A control device, method, and DC socket for a DC socket.

Abstract

This invention discloses a control device, method, and DC socket for a DC socket. The device includes: a detection unit that detects electrical parameters of a DC input interface, denoted as first electrical parameters; detects electrical parameters of a DC output interface, denoted as second electrical parameters; and detects the impedance parameters of the DC output interface; a control unit that determines whether a load is connected to the DC output interface based on the impedance parameters of the DC output interface; and, when a load is determined to be connected to the DC output interface, controls the drive signal of a DC / DC conversion module based on the first and second electrical parameters to adjust the magnitude and change time of the output voltage of the DC output interface. This solution, by dynamically adjusting the DC output electrical parameters of the DC socket based on the electrical parameters of the DC output interface in the socket interface, helps to improve the stability and reliability of the power supply of the DC socket.

Description

Technical Field

[0001] This invention belongs to the field of power supply technology, specifically relating to a control device, method, and DC socket for a DC socket, and more particularly to a control circuit, method, and DC power supply socket for a flexible DC power supply socket. Background Technology

[0002] With the development of energy internet technology, new power supply and consumption systems are showing a diversified trend, and the load penetration rate of DC characteristics is constantly increasing, leading to a greater demand for high-efficiency DC power supply systems and low-voltage DC interfaces. In related solutions, most DC socket interfaces can only support constant voltage output and lack dynamic output voltage variation and load response adjustment functions. They cannot support flexible voltage, flexible current, and flexible power regulation functions based on the characteristics of DC power supply and consumption, which is detrimental to the stability of DC power supply and the reliability of DC sockets.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a control device, method, and DC socket for a DC socket, in order to solve the problem that the socket interface of a DC socket can only support constant voltage output and does not have the function of dynamic change of output voltage and flexible adjustment of load response, which is not conducive to the stability and reliability of the power supply of the DC socket. The invention achieves the effect of dynamically adjusting the DC output electrical parameters of the DC socket according to the electrical parameters of the DC output interface in the socket interface, which is beneficial to improving the stability and reliability of the power supply of the DC socket.

[0005] This invention provides a control device for a DC socket, the DC socket comprising: a DC input interface, a DC / DC conversion module, and a DC output interface; the DC / DC conversion module is capable of performing DC / DC conversion on a first DC power input from the DC input interface and outputting the converted second DC power from the DC output interface; the control device for the DC socket comprises: a detection unit and a control unit; wherein the detection unit is configured to detect electrical parameters of the DC input interface, denoted as first electrical parameters; detect electrical parameters of the DC output interface, denoted as second electrical parameters; and detect impedance parameters of the DC output interface; the control unit is configured to determine whether a load is connected to the DC output interface based on the impedance parameters of the DC output interface; and, when it is determined that a load is connected to the DC output interface, control the drive signal of the DC / DC conversion module based on the first electrical parameters and the second electrical parameters to adjust the magnitude and change time of the output voltage of the DC output interface.

[0006] In some embodiments, the impedance parameters of the DC output interface include: no-load impedance and current impedance; the control unit determines whether the DC output interface has a load connected based on the impedance parameters of the DC output interface, including: determining the impedance difference between the no-load impedance and the current impedance; if the impedance difference meets the set impedance range, then it is determined that the DC output interface has a load connected.

[0007] In some embodiments, the electrical parameters in the first and second electrical parameters include voltage and current; the control unit controls the drive signal of the DC / DC conversion module according to the first and second electrical parameters to adjust the magnitude and change time of the output voltage of the DC output interface, including: when the output voltage of the DC socket is used to power the load, controlling the DC / DC conversion module to operate, so that the voltage of the DC output interface rises to a first set voltage at a first set time, so as to start the load; the first set voltage is greater than a minimum set voltage and less than the rated voltage of the DC output interface.

[0008] In some embodiments, the control unit controls the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface. The control unit further includes: when the voltage of the DC output interface rises to a first set voltage at a first set time and the load starts, determining the power of the load according to the voltage and current in the second electrical parameter; if the power of the load rises to a value greater than or equal to a set coefficient multiple of the rated power and less than or equal to the rated power, then controlling the voltage of the DC output interface to rise to the rated voltage at a second set time.

[0009] In some embodiments, the control unit controls the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface, and further includes: when the voltage of the DC output interface rises to the rated voltage at a second set time, continuing to determine the power of the load according to the voltage and current in the second electrical parameter; if the power of the load rises to a level greater than the rated power and less than or equal to the maximum set power, then controlling the voltage of the DC output interface to rise to the second set voltage at a third set time; the second set voltage is greater than the rated voltage and less than or equal to the maximum set voltage.

[0010] In some embodiments, the control unit controls the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface. The control unit further includes: if the voltage of the DC output interface rises to a second set voltage at a third set time, continuing to determine the power of the load based on the voltage and current in the second electrical parameter; if the power of the load rises to a level greater than the maximum set power, then controlling the voltage of the DC output interface to decrease until the voltage of the DC output interface decreases to a level less than the minimum set voltage, then controlling the voltage of the DC output interface to disconnect from the output and initiating a reminder message indicating that the DC socket is in a fault state.

[0011] In some embodiments, the control unit controls the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface. It further includes: when the voltage of the DC output interface rises to a first set voltage at a first set time and the load is started, if the voltage and / or current in the first electrical parameter decreases, then the voltage and / or current output by the DC output interface is appropriately reduced.

[0012] In conjunction with the above-described device, the present invention further provides a DC socket, comprising: the control device for the DC socket described above.

[0013] In conjunction with the aforementioned DC socket, the present invention further provides a control method for a DC socket, comprising: the DC socket including: a DC input interface, a DC / DC conversion module, and a DC output interface; the DC / DC conversion module being capable of performing DC / DC conversion on a first DC power input from the DC input interface, and outputting the converted second DC power from the DC output interface; the control method for the DC socket comprising: detecting electrical parameters of the DC input interface, denoted as first electrical parameters; detecting electrical parameters of the DC output interface, denoted as second electrical parameters; and detecting impedance parameters of the DC output interface; determining whether a load is connected to the DC output interface based on the impedance parameters of the DC output interface; and, when it is determined that a load is connected to the DC output interface, controlling the drive signal of the DC / DC conversion module based on the first electrical parameters and the second electrical parameters to adjust the magnitude and change time of the output voltage of the DC output interface.

[0014] In some embodiments, the impedance parameters of the DC output interface include: no-load impedance and current impedance; determining whether the DC output interface has a load connected based on the impedance parameters of the DC output interface includes: determining the impedance difference between the no-load impedance and the current impedance; if the impedance difference meets the set impedance range, then it is determined that the DC output interface has a load connected.

[0015] In some embodiments, the electrical parameters in the first and second electrical parameters include voltage and current. Controlling the drive signal of the DC / DC conversion module according to the first and second electrical parameters to adjust the magnitude and timing of the output voltage of the DC output interface includes: when the output voltage of the DC socket is used to power the load, controlling the DC / DC conversion module to operate, causing the voltage of the DC output interface to rise to a first set voltage at a first set time, thereby starting the load; the first set voltage is greater than a minimum set voltage and less than the rated voltage of the DC output interface.

[0016] In some embodiments, controlling the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface further includes: when the voltage of the DC output interface rises to a first set voltage at a first set time and the load starts, determining the power of the load according to the voltage and current in the second electrical parameter; if the power of the load rises to a value greater than or equal to a set coefficient multiple of the rated power and less than or equal to the rated power, then controlling the voltage of the DC output interface to rise to the rated voltage at a second set time.

[0017] In some embodiments, controlling the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface further includes: when the voltage of the DC output interface rises to the rated voltage at a second set time, continuing to determine the power of the load according to the voltage and current in the second electrical parameter; if the power of the load rises to a level greater than the rated power and less than or equal to the maximum set power, then controlling the voltage of the DC output interface to rise to the second set voltage at a third set time; the second set voltage is greater than the rated voltage and less than or equal to the maximum set voltage.

[0018] In some implementations, controlling the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface further includes: if the voltage of the DC output interface rises to a second set voltage at a third set time, continuing to determine the power of the load according to the voltage and current in the second electrical parameter; if the power of the load rises to a level greater than the maximum set power, then controlling the voltage of the DC output interface to decrease until the voltage of the DC output interface decreases to a level less than the minimum set voltage, then controlling the voltage of the DC output interface to disconnect the output and initiating a reminder message that the DC socket is in a fault state.

[0019] In some embodiments, the drive signal of the DC / DC conversion module is controlled according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface. The method further includes: when the voltage of the DC output interface rises to a first set voltage at a first set time and the load is started, if the voltage and / or current in the first electrical parameter decreases, the voltage and / or current output by the DC output interface is appropriately reduced.

[0020] Therefore, the solution of the present invention detects the electrical parameters of the DC output interface in the socket interface of the DC socket, including voltage, current and impedance. Based on the detected impedance, it determines whether a load is connected to the DC output interface. If a load is connected, the power of the load is determined based on the detected voltage and current. The output voltage of the DC socket is established based on the power of the load, and the rise time and magnitude of the output voltage of the DC socket are adjusted to dynamically regulate the output voltage of the DC socket within a set range. The output voltage of the DC socket is then used to supply power to the load. Thus, by dynamically adjusting the DC output electrical parameters of the DC socket based on the electrical parameters of the DC output interface in the socket interface of the DC socket, it is beneficial to improve the stability and reliability of the power supply of the DC socket.

[0021] Furthermore, in the present invention, when the output voltage of the DC socket is used to power the load, the electrical parameters of the DC output interface of the DC socket are detected. These electrical parameters include voltage and current. Based on the input power of the DC socket, the power supply voltage of the load is adjusted. When the load is operating stably, if the input electrical parameters of the DC socket decrease, the output electrical parameters of the DC output interface of the DC socket are also controlled to decrease accordingly. This enables the load to respond to the adjustment signal and change its power level, thereby improving the safety of DC power supply and the lifespan of the interface.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0023] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a structure of an embodiment of the control device for the DC socket of the present invention;

[0025] Figure 2 This is a flowchart illustrating an embodiment of the control method for a DC socket of the present invention;

[0026] Figure 3 This is a flowchart illustrating an embodiment of the method of the present invention for determining whether a load is connected to the DC output interface;

[0027] Figure 4 This is a flowchart illustrating an embodiment of the first heavy-load control in the method of the present invention;

[0028] Figure 5 This is a flowchart illustrating an embodiment of the second overload control in the method of the present invention;

[0029] Figure 6 This is a flowchart illustrating an embodiment of the third overload control in the method of the present invention;

[0030] Figure 7 A schematic diagram of one embodiment of a DC socket;

[0031] Figure 8 A schematic diagram of one embodiment of a DC-DC socket conversion unit;

[0032] Figure 9 A circuit diagram of one embodiment of a DC-DC socket conversion unit;

[0033] Figure 10 A schematic diagram illustrating the workflow of one embodiment of a DC-DC socket conversion unit;

[0034] Figure 11 This is a schematic diagram of the voltage regulation waveform of an embodiment of the DC output interface in a DC socket conversion unit.

[0035] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0036] 1-Socket panel; 2-DC output interface; 3-Status indicator light; 4-First fast charging interface; 5-Second fast charging interface; 6-DC input interface; 7-DC / DC conversion module; 8-Acquisition module (specifically, the voltage and current acquisition module for the DC output interface); 9-DC output interface; 10-DC voltage input terminal; 11-DC input protection module; 12-DC voltage output interface; 13-MCU control module; 14-Power supply module; 15-Interface detection module. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention 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 invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0038] According to an embodiment of the present invention, a control device for a DC socket is provided. See also Figure 1 The diagram shows a structural schematic of an embodiment of the device of the present invention. The DC socket includes: a DC input interface, a DC / DC conversion module, and a DC output interface. The DC input interface is, for example, DC input interface 6; the DC / DC conversion module is, for example, DC / DC conversion module 7; and the DC output interfaces are, for example, DC output interface 2, DC output interface 9, etc. The DC / DC conversion module is capable of performing DC / DC conversion on the first DC power input from the DC input interface and outputting the converted second DC power from the DC output interface.

[0039] Figure 7 This is a schematic diagram of one embodiment of a DC socket. Figure 7 As shown, the DC socket includes: a socket panel 1. The socket panel 1 of the DC socket is provided with a DC output interface 2, a status indicator light 3, a first fast charging interface 4, and a second fast charging interface 5.

[0040] exist Figure 7In the example shown, the socket panel 1 provides structural support and sealing insulation. The socket panel 1 has a single circular DC output interface, characterized by a positive terminal at the center and a negative terminal at the outer circle. It outputs a rated voltage of 48VDC, and the range of the output voltage Uo is set, such as satisfying minimum output voltage Umin ≤ output voltage Uo ≤ maximum output voltage Umax. A second fast charging interface 5, such as a USB interface, can be provided on the socket panel 1. Optional indicator lights, such as a status indicator light 3, can be provided on the socket panel 1 to indicate the operating status of the DC output interface 2 of the DC socket: when the DC output interface 2 is connected to a load and is normally powered, the first set color light (e.g., green) is constantly lit. When the DC output interface 2 is connected without load, the second set color light (e.g., yellow) is constantly lit. In case of a fault, the third set color light (e.g., red) flashes.

[0041] certainly, Figure 7 The socket panel 1 shown is only one example of an implementation method. The panel can have various shapes and styles of interface outputs. The indicator light is only for display purposes; the socket may not have an indicator light function, and it will not affect its use and control.

[0042] Figure 8 This is a schematic diagram of one embodiment of a DC-DC socket conversion unit. Figure 8 As shown, a DC socket conversion unit is provided inside the socket panel 1 of the DC socket. The DC socket conversion unit includes: a DC input interface 6, a DC / DC conversion module 7, a data acquisition module 8 (specifically, a voltage and current acquisition module for the DC output interface), and a DC output interface 9. Figure 8 The DC output interface 9 shown is... Figure 7 The DC output interface 2 shown is the same interface. Alternatively, Figure 8 The DC output interface 9 shown can be electrically connected to Figure 7 The DC output interface 2 is shown.

[0043] Of course, the DC / DC conversion module 7 can be either a unidirectional or bidirectional DC / DC conversion circuit. Here, a bidirectional DC / DC conversion circuit refers to a 48V output interface with a built-in isolation circuit in the socket, where the current can flow in both directions. When the interface is connected to an electrical load, the output current flows in the forward direction, providing power to the load. When the output interface is connected to a power supply or battery, the output current can flow in the reverse direction, meaning the 48V power is supplied to the high-voltage side (400V) via the DC / DC converter.

[0044] Figure 9 This is a schematic diagram of the circuit structure of one embodiment of a DC-DC socket conversion unit. Figure 9As shown, in the DC socket conversion unit, the DC input interface 6 includes a DC voltage input terminal 10, which specifically includes a positive voltage Vin+ input terminal and a negative voltage Vin- input terminal. The DC / DC conversion module 7 includes an input protection module 11, a capacitor C1, and a DC / DC converter. The acquisition module 8 includes a sampling resistor R0. The DC output interface 9 includes a DC voltage output interface 12. The DC / DC converter includes switches Q1 and Q2, an inductor L1, a transformer T1, capacitors C2 and C3, and diodes D1 and D2.

[0045] exist Figure 9 In the example shown, the DC socket conversion unit also includes: MCU control module 13, power supply module 14 and interface detection module 15.

[0046] exist Figure 9 In the example shown, the positive voltage Vin+ input terminal is connected to the first connection terminal of the input protection module 11. The negative voltage Vin- input terminal is connected to the second connection terminal of the input protection module 11. The third connection terminal of the input protection module 11 is connected to the first connection terminal of capacitor C1. The fourth connection terminal of the input protection module 11 is connected to the second connection terminal of capacitor C1. The first connection terminal of capacitor C1 is connected to the first connection terminal of switch Q1. The second connection terminal of capacitor C1 is connected to the second connection terminal of switch Q2. The second connection terminal of switch Q1 is connected to the first connection terminal of switch Q2. The second connection terminal of switch Q1 is grounded (specifically, connected to the power supply ground) via inductor L1, the primary winding of transformer T1, and capacitor C2. The second connection terminal of switch Q2 is grounded.

[0047] The first connection terminal of the secondary winding of transformer T1 is connected to the anode of diode D1. The cathode of diode D1 is grounded (specifically, connected to signal ground) via capacitor C3. The cathode of diode D1 also serves as the voltage output terminal Vo+, connected to the first connection terminal of DC voltage output interface 12. The second connection terminal of the secondary winding of transformer T1 is connected to the anode of diode D2. The cathode of diode D2 is connected to the cathode of diode D1. The center tap of the secondary winding of transformer T1 is grounded (specifically, connected to signal ground). The center tap of the secondary winding of transformer T1 is also connected to the second connection terminal of DC voltage output interface 12 via sampling resistor R0. The signal at the voltage output terminal Vo+, the signal at the center tap of the secondary winding of transformer T1 (i.e., the signal at the first connection terminal of sampling resistor R0), and the signal at the second connection terminal of sampling resistor R0 are used as the first feedback signal (i.e., feedback signal 1) and input to the first input terminal of MCU control module 13. The first connection terminal of DC voltage output interface 12 is connected to the first input terminal of interface detection module 15. The second connection terminal of the DC voltage output interface 12 is connected to the second input terminal of the interface detection module 15. The output terminal of the interface detection module 15, as a second feedback signal (such as feedback signal 2), is input to the second input terminal of the MCU control module 13. The first output terminal of the MCU control module 13 is connected to the control terminal of switch Q1, and the control terminal of switch Q1 is connected to the second connection terminal of switch Q1. The second output terminal of the MCU control module 13 is connected to the control terminal of switch Q2, and the control terminal of switch Q2 is connected to the second connection terminal of switch Q2. The first power supply terminal of the power supply module 14 is connected to the power supply terminal of the MCU control module 13. The second power supply terminal of the power supply module 14 is connected to the power supply terminal of the interface detection module 14.

[0048] Feedback signal 1 mainly includes the output voltage and current values. By comparing these values ​​with reference values ​​set in the MCU's internal program, it controls the states of switches Q1 and Q2 to decrease, increase, or stabilize the output voltage and current values, thus enabling the detection of output voltage and current. Feedback signal 2 primarily provides feedback from the interface detection module, such as the detected interface impedance value and high / low level changes, allowing the MCU to collect the interface status in real time for control adjustments. The interface detection module 14 can be a dedicated chip or detection circuit, primarily responsible for impedance detection between the positive and negative terminals of the interface, converting the impedance detection results into a voltage signal for MCU calculation. The internal circuitry can consist of series resistors, differential sampling, and operational amplifier circuits.

[0049] The control device for the DC socket includes a detection unit and a control unit. The detection unit may include a data acquisition module 8, an interface detection module 15, etc., and the control unit may include an MCU control module 13.

[0050] The detection unit is configured to detect the electrical parameters of the DC input interface, denoted as the first electrical parameter, such as by using a DC input interface detection circuit. It also detects the electrical parameters of the DC output interface, denoted as the second electrical parameter, such as by using a DC output interface detection circuit. Furthermore, it detects the impedance parameters of the DC output interface, such as by using an impedance detection circuit.

[0051] The control unit is configured to determine whether a load is connected to the DC output interface based on the impedance parameters of the DC output interface.

[0052] In some embodiments, the impedance parameters of the DC output interface include: no-load impedance and current impedance. The no-load impedance is the impedance when no load is connected between the positive and negative terminals of the DC output interface. The current impedance is the impedance between the positive and negative terminals of the DC output interface as currently measured.

[0053] The control unit determines whether a load is connected to the DC output interface based on the impedance parameters of the DC output interface, including:

[0054] The control unit is further configured to determine the impedance difference between the no-load impedance and the current impedance.

[0055] The control unit is further configured to determine that a load is connected to the DC output interface if the impedance difference meets the set impedance range.

[0056] Specifically, the load connection status is analyzed as follows: First, the change in interface impedance ΔZ = Z0 - Z is calculated through the impedance detection circuit. Z0 is the impedance between the positive and negative terminals when there is no load connected, and Z is the real-time detection value. The change in ΔZ indicates that there is a load connected to the interface.

[0057] For example, when there is no load connected, the value of Z0 is stable. When an external electrical load is connected to the interface, Z0 will increase or decrease. For example, if a resistor R1 is connected to the interface, the interface impedance becomes Z0, and the parallel impedance of the resistor R1 is Z, where ΔZ = |Z0 - Z|. The presence of a load can be determined by comparing three detection values. When the load is unplugged, the output current decreases to 0, and the impedance detection value between the positive and negative terminals is Z0, indicating that there is no load connected. Z0 varies depending on the load. However, generally, if ΔZ is greater than or equal to 5% of Z0, it is considered that a load is connected.

[0058] The control unit is further configured to, when it is determined that a load is connected to the DC output interface, control the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter, so as to adjust the magnitude and change time of the output voltage of the DC output interface, that is, to adjust the magnitude of the output voltage of the DC output interface and the change time of the output voltage of the DC output interface.

[0059] Specifically, the socket panel 1 is equipped with a DC / DC conversion module 7, whose main function is to isolate and convert high-voltage power supply, such as 375VDC / 400VDC, to low-voltage 48VDC. The DC socket conversion unit collects electrical parameters such as voltage, current, and impedance of the DC input interface and DC output interface, analyzes the power supply status of the socket, and adjusts the start-up and steady-state voltage values ​​of the output voltage to achieve flexible adjustment and safe stability of the DC voltage of the socket output interface, and provides overload and short-circuit protection functions.

[0060] exist Figure 9 In the example shown, the main functions of the DC socket conversion unit include: acquiring parameters such as voltage, current, power, and impedance of the DC input and output interfaces through a sampling circuit; analyzing the load connection status based on these parameters; calculating the load size by detecting the electrical parameters of the power supply circuit inside the DC socket, and adjusting the rise time and magnitude of the output DC voltage; and dynamically adjusting the voltage value within a set range to achieve load response regulation of the interface voltage.

[0061] Specifically, calculating the load size and adjusting the rise time and magnitude of the output DC voltage includes: when the load is running, calculating the load power value by detecting the voltage and current magnitudes, and adjusting the interface output voltage value based on the magnitude and changes of the power value.

[0062] Figure 10 This is a schematic diagram illustrating the workflow of one embodiment of a DC-DC socket conversion unit. Figure 10 As shown, the working process of the DC-DC adapter unit includes:

[0063] Step 1: Turn on the input voltage.

[0064] Step 2: Power supply module 14 is activated.

[0065] Step 3: Initialize the MCU control module 13 and set the initial standby state.

[0066] For example, in standby mode settings, the MCU enters standby mode, the auxiliary power supply, the feedback signals from various voltage and current sampling modules are normal, the interface detection module is normal, and after initialization, it enters standby mode. At this time, there is no output of the switch signal, and the interface output voltage is 0, in order to reduce the standby power consumption of the circuit and the MCU.

[0067] Step 4: Interface detection module 15 detects the status of DC output interface 2.

[0068] Step 5: Determine if there is a load connected to DC output interface 2: If yes, proceed to step 6. Otherwise, return to step 3.

[0069] Step 6: The MCU control module 13 outputs a drive signal to control the main circuit of the DC socket conversion unit to work and establish the output voltage.

[0070] like Figure 9 and Figure 10 As shown, in the internal conversion unit of the socket (i.e., the DC socket conversion unit), the input voltage Vin on the input side of the internal conversion unit is preferably a DC voltage, such as 375VDC or 400VDC. A protection circuit is provided on the input side, such as adding a DC fuse as an input protection module 11, or adding a diode, rectifier bridge, or similar switching device as an input protection module 11 to achieve reverse connection protection of the input voltage, thereby increasing the reliability of the Vin DC power supply bus. The internal conversion unit of the socket preferably adopts a high-efficiency DC / DC topology (i.e., DC / DC conversion module 07), such as LLC, bridge circuit, etc.

[0071] The interface detection module 15 is used to identify whether a load is connected to the output interface, and the signal is fed back to the MCU for judgment and control. Specifically, in the socket internal conversion unit (i.e., DC socket conversion unit), on the output side of the socket internal conversion unit, there are DC socket control circuits, current detection circuits, and impedance detection circuits used to determine whether a load is connected to the output interface. The sampling signal has a separate feedback loop, preferably using optocouplers, isolation chip circuits, etc. as the feedback loops for signal feedback 1 and signal feedback 2. The main function of the power supply module 14 is to provide auxiliary power to the MCU control module 13 and the detection sampling module (i.e., interface detection module 15). By identifying the status of the output interface and calculating the load power, the value of the output voltage Uo is adjusted to realize different working modes. The output voltage Uo can be autonomously adjusted within a set range to match different load sizes and improve the stability of the interface output voltage.

[0072] The voltage detection circuit can be implemented using a series resistor between the positive and negative terminals for voltage division sampling, or a dedicated voltage sampling chip module. It converts the voltage value into a sampled signal and feeds it back to the MCU. The current detection circuit can be implemented using a sampling resistor R0 or a current sensor, converting the current signal into a voltage signal and feeding it back to the MCU. The impedance detection circuit can be a dedicated chip or a detection circuit, primarily implementing impedance detection between the positive and negative terminals of the interface, converting the impedance detection result into a voltage signal and feeding it back to the MCU for calculation. The internal circuitry can consist of a series resistor, differential sampling, and operational amplifier circuitry.

[0073] The present invention provides a circuit and control method for a flexible DC power socket. By collecting parameters such as voltage, current, power, and impedance from the DC input and output interfaces, the system analyzes the load connection status, calculates the load size through circuit power parameter detection, and adjusts the rise time and magnitude of the output DC voltage. Furthermore, the voltage value can be dynamically varied within a specified range to accommodate different load sizes. This enables the DC socket's output voltage to achieve proactive response and flexible adjustment within a defined range, improving the stability of the DC power supply system and solving the problems of DC sockets lacking proactive voltage response and flexible load adjustment.

[0074] In some implementations, the electrical parameters in the first and second electrical parameters include voltage and current.

[0075] The control unit controls the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface, including a light-load control process, as follows:

[0076] The control unit is further configured to, upon determining that a load is connected to the DC output interface and supplying power to the load using the output voltage of the DC socket, control the DC / DC conversion module to operate, causing the voltage of the DC output interface to rise to a first set voltage at a first set time, thereby activating the load. The first set voltage is greater than a minimum set voltage and less than the rated voltage of the DC output interface.

[0077] Figure 11 This is a schematic diagram of the voltage regulation waveform of an embodiment of the DC output interface in a DC socket conversion unit. The following is in conjunction with... Figure 11 The example shown illustrates the control process of the output voltage rise in the DC socket, and more specifically the flexible DC power supply socket, under no-load, light-load, normal load, and abnormal conditions.

[0078] In the first scenario: under no-load mode, the DC socket is in standby mode, the indicator light displays the second set color light (such as yellow light), and the output voltage Uo of DC output interface 2 is 0V.

[0079] The second scenario: Light load mode, such as Figure 11 As shown, at time t0, the DC output interface 2 is connected to a load. The impedance detection circuit in the interface detection module 15 identifies the interface impedance change value ΔZ, determining that the DC output interface 2 is connected to a load. The DC / DC conversion module 7 operates, and the voltage of the DC output interface 2 rises. At time t1, the voltage of the DC output interface 2 rises to the first set voltage U1. At this time, the voltage of the DC output interface 2 satisfies the minimum set voltage Umin < the first set voltage U1 < the rated output voltage Uo, and the load starts. Using the power P calculation formula P = U * I, where U is voltage and I is current, the power of the load P1 is calculated. When P1 < 0.2Po, Po is the rated power, and the output voltage U1 of the DC output interface 2 operates stably. The time from t0 to t1 is within 500ms. t0 is the initial time, and t1 is the first set time.

[0080] In light load mode, the MCU sets the output voltage value to U1. By increasing the duty cycle of the drive signals of switches Q1 and Q2 or changing the operating frequency, the MCU detects the output voltage U in real time and compares it with the set value U1, so that the output voltage rises from 0 to U1 and is output stably.

[0081] In some embodiments, the control unit controls the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface, and further includes a first heavy-load control process, as follows:

[0082] The control unit is further configured to determine the power of the load based on the voltage and current in the second electrical parameters when the voltage of the DC output interface rises to a first set voltage at a first set time and the load is started.

[0083] The control unit is further configured to control the voltage of the DC output interface to rise to the rated voltage at a second set time if the power of the load rises to a set coefficient multiple greater than or equal to the rated power and less than or equal to the rated power.

[0084] The third scenario: When the load current continues to increase, if the load power P1 satisfies 0.2Po≤P1≤Po, the output voltage of DC output interface 2 will increase, reaching the rated voltage U0 at time t2 and operating stably. The adjustment can be completed within 1 second from t1 to t2. t2 is the second set time.

[0085] When the load power reaches the set range value, the MCU sets the output voltage value to U0. By increasing the duty cycle of the driving signals of switch Q1 and switch Q2 or changing the operating frequency, the output voltage U is detected in real time and compared with the set value U0. Finally, the output voltage rises from U1 to U0 and is stably output.

[0086] In some embodiments, the control unit controls the driving signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface. It further includes: the process of second overload control, which is specifically as follows:

[0087] The control unit is specifically further configured to, when the voltage of the DC output interface rises to the rated voltage at the second set time, continue to determine the power of the load according to the voltage and current in the second electrical parameter.

[0088] The control unit is specifically further configured to, if the power of the load rises to be greater than the rated power and less than or equal to the maximum set power, control the voltage of the DC output interface to rise to the second set voltage at the third set time. The second set voltage is greater than the rated voltage and less than or equal to the maximum set voltage.

[0089] The fourth case: When Po < P1 ≤ Pmax, the output voltage of the DC output interface 2 rises to the second set voltage U2 at the t3 moment and operates, satisfying Uo < U2 ≤ Umax. t3 is the third set time.

[0090] When the load power reaches the set range value, the MCU sets the output voltage value to U2. By further increasing the duty cycle of the driving signals of switch Q1 and switch Q2 or changing the operating frequency, the output voltage U is detected in real time and compared with the set value U2. Finally, the output voltage rises from U1 to U​​​​​​​​​

[0094] The control unit is specifically further configured that if the power of the load rises to be greater than the maximum set power, it controls the voltage of the DC output interface to decrease until the voltage of the DC output interface decreases to be less than the minimum set voltage, and then controls the DC output interface to disconnect the output and initiate a reminder message indicating that the DC socket is in a fault state.

[0095] The fifth case: when the power P1 of the load satisfies that the load power P1 exceeds the set protection value Pmax of the socket, the output voltage of the DC output interface 2 decreases. When the output voltage Uo of the DC output interface 2 < Umin, the output is disconnected. At the same time, the third set color light (such as a red light) of the socket indicator flashes to indicate the fault state.

[0096] Among them, when the load power exceeds the protection value, the MCU outputs a control signal to reduce the duty cycle or increase the frequency to reduce the output voltage value. The load size remains unchanged, and the output voltage continues to decrease until the output is disconnected to 0, and the switches Q1 and Q2 do not work.

[0097] In the solution of the present invention, for the output voltage or load response control of the flexible DC power supply socket, specifically, when the output voltage of the DC output interface 2 is operating stably, a flexible load adjustment signal can be transmitted through the change value of the output voltage of the DC output interface 2 to achieve the adjustment function of the DC socket load response. For example: when the output voltage of the socket is the rated value Uo, the output load power is the rated power Po. At this time, when the output voltage of the socket interface decreases to the first set voltage U1, the corresponding load power actively responds and reduces the operating power to the first set power P1, where the first set power P1 < the rated power Po.

[0098] Of course, the adjustable electrical parameters of the DC output interface 2 are not limited to the flexible adjustment of voltage, but can also be the adjustment of the output current magnitude.

[0099] In some embodiments, the control unit controls the driving signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface, and further includes: a process of adapting the input capacity control, specifically as follows:

[0100] The control unit is specifically further configured that when the voltage of the DC output interface rises to the first set voltage at the first set moment and the load starts, if the voltage and / or current in the first electrical parameter decreases, it adapts to reduce the voltage and / or current output by the DC output interface.

[0101] In the solution of this invention, the waveform and / or data of the socket voltage, current, and power can be detected to determine whether the increase in the interface output voltage or current value can automatically adjust to the load size. Figure 11 As shown, does it have the function of voltage / current regulation to transmit load response signals during steady-state operation? The specific judgment process is as follows:

[0102] The first step is to identify the load connection at the output interface by connecting and disconnecting a load, and then testing the interface voltage waveform and value. When no load is connected, the output voltage is 0 or a very small voltage. When a load is connected, the voltage waveform is similar to... Figure 11 The rising waveform changes with the load power, and the output port voltage value will also change accordingly.

[0103] The second step involves the input voltage decreasing during stable operation, which in turn causes the output voltage to decrease. The load detects this voltage change and reduces its operating power, thus achieving flexible DC power regulation. The difference lies in the fact that in related solutions, the output voltage remains constant or changes are achieved through communication or other means when the input voltage varies within a certain range. In contrast, the flexible DC power supply transmits load regulation signals based on changes in the bus voltage, allowing the load to respond by adjusting its power output.

[0104] Reducing the output voltage can be achieved through chip control by decreasing the proportion of the drive signals for switches Q1 and Q2 or by increasing the switching frequency.

[0105] In this invention, by collecting electrical parameters such as the impedance at both ends of the interface, the system determines whether a load is connected and implements output voltage mode switching control, reducing the current surge caused by direct connection. This effectively reduces the current surge generated when a load is connected to the socket, improving DC power safety and interface lifespan. It solves the problem of excessive current surge when a load is connected to a DC socket, thus improving interface lifespan and safety.

[0106] The technical solution of this invention detects the electrical parameters of the DC output interface in the socket of a DC socket. These electrical parameters include voltage, current, and impedance. The detected impedance determines whether a load is connected to the DC output interface. If a load is connected, the power of the load is determined based on the detected voltage and current. The output voltage of the DC socket is then established based on the load power, and the rise time and magnitude of the output voltage are adjusted to dynamically regulate the output voltage within a set range. The output voltage of the DC socket is then used to power the load. Therefore, by dynamically adjusting the DC output electrical parameters of the DC socket based on the electrical parameters of the DC output interface in the socket, the stability and reliability of the DC socket's power supply are improved.

[0107] According to an embodiment of the present invention, a DC socket corresponding to a control device for a DC socket is also provided. This DC socket may include the control device for the DC socket described above.

[0108] Since the processing and functions implemented by the DC socket in this embodiment are basically the same as those in the embodiments, principles and examples of the device, any details not covered in this embodiment can be found in the relevant descriptions in the foregoing embodiments, and will not be repeated here.

[0109] The technical solution of this invention detects the electrical parameters of the DC output interface in the socket of a DC socket. These parameters include voltage, current, and impedance. Based on the detected impedance, it is determined whether a load is connected to the DC output interface. When a load is connected, the power of the load is determined based on the detected voltage and current. The output voltage of the DC socket is then established based on the load power, and the rise time and magnitude of the output voltage are adjusted to dynamically regulate the output voltage of the DC socket within a set range. The output voltage of the DC socket is then used to supply power to the load, which can effectively reduce the current surge caused by the load connecting to the socket, improve the safety of DC power supply, and extend the lifespan of the interface.

[0110] According to embodiments of the present invention, a control method for a DC socket corresponding to a DC socket is also provided, such as... Figure 2 The diagram shows a flowchart of an embodiment of the method of the present invention. The DC socket includes: a DC input interface, a DC / DC conversion module, and a DC output interface. Examples of DC input interfaces include DC input interface 6, DC / DC conversion modules include DC / DC conversion module 7, and DC output interfaces include DC output interface 2, DC output interface 9, etc. The DC / DC conversion module is capable of performing DC / DC conversion on a first DC current input from the DC input interface and outputting the converted second DC current from the DC output interface.

[0111] Figure 7 This is a schematic diagram of one embodiment of a DC socket. Figure 7 As shown, the DC socket includes: a socket panel 1. The socket panel 1 of the DC socket is provided with a DC output interface 2, a status indicator light 3, a first fast charging interface 4, and a second fast charging interface 5.

[0112] exist Figure 7In the example shown, the socket panel 1 provides structural support and sealing insulation. The socket panel 1 has a single circular DC output interface, characterized by a positive terminal at the center and a negative terminal at the outer circle. It outputs a rated voltage of 48VDC, and the range of the output voltage Uo is set, such as satisfying minimum output voltage Umin ≤ output voltage Uo ≤ maximum output voltage Umax. A second fast charging interface 5, such as a USB interface, can be provided on the socket panel 1. Optional indicator lights, such as a status indicator light 3, can be provided on the socket panel 1 to indicate the operating status of the DC output interface 2 of the DC socket: when the DC output interface 2 is connected to a load and is normally powered, the first set color light (e.g., green) is constantly lit. When the DC output interface 2 is connected without load, the second set color light (e.g., yellow) is constantly lit. In case of a fault, the third set color light (e.g., red) flashes.

[0113] certainly, Figure 7 The socket panel 1 shown is only one example of an implementation method. The panel can have various shapes and styles of interface outputs. The indicator light is only for display purposes; the socket may not have an indicator light function, and it will not affect its use and control.

[0114] Figure 8 This is a schematic diagram of one embodiment of a DC-DC socket conversion unit. Figure 8 As shown, a DC socket conversion unit is provided inside the socket panel 1 of the DC socket. The DC socket conversion unit includes: a DC input interface 6, a DC / DC conversion module 7, a data acquisition module 8 (specifically, a voltage and current acquisition module for the DC output interface), and a DC output interface 9. Figure 8 The DC output interface 9 shown is... Figure 7 The DC output interface 2 shown is the same interface. Alternatively, Figure 8 The DC output interface 9 shown can be electrically connected to Figure 7 The DC output interface 2 is shown.

[0115] Of course, the DC / DC conversion module 7 can be either a unidirectional or bidirectional DC / DC conversion circuit. Here, a bidirectional DC / DC conversion circuit refers to a 48V output interface with a built-in isolation circuit in the socket, where the current can flow in both directions. When the interface is connected to an electrical load, the output current flows in the forward direction, providing power to the load. When the output interface is connected to a power supply or battery, the output current can flow in the reverse direction, meaning the 48V power is supplied to the high-voltage side (400V) via the DC / DC converter.

[0116] Figure 9 This is a schematic diagram of the circuit structure of one embodiment of a DC-DC socket conversion unit. Figure 9As shown, in the DC socket conversion unit, the DC input interface 6 includes a DC voltage input terminal 10, which specifically includes a positive voltage Vin+ input terminal and a negative voltage Vin- input terminal. The DC / DC conversion module 7 includes an input protection module 11, a capacitor C1, and a DC / DC converter. The acquisition module 8 includes a sampling resistor R0. The DC output interface 9 includes a DC voltage output interface 12. The DC / DC converter includes switches Q1 and Q2, an inductor L1, a transformer T1, capacitors C2 and C3, and diodes D1 and D2.

[0117] exist Figure 9 In the example shown, the DC socket conversion unit also includes: MCU control module 13, power supply module 14 and interface detection module 15.

[0118] exist Figure 9 In the example shown, the positive voltage Vin+ input terminal is connected to the first connection terminal of the input protection module 11. The negative voltage Vin- input terminal is connected to the second connection terminal of the input protection module 11. The third connection terminal of the input protection module 11 is connected to the first connection terminal of capacitor C1. The fourth connection terminal of the input protection module 11 is connected to the second connection terminal of capacitor C1. The first connection terminal of capacitor C1 is connected to the first connection terminal of switch Q1. The second connection terminal of capacitor C1 is connected to the second connection terminal of switch Q2. The second connection terminal of switch Q1 is connected to the first connection terminal of switch Q2. The second connection terminal of switch Q1 is grounded (specifically, connected to the power supply ground) via inductor L1, the primary winding of transformer T1, and capacitor C2. The second connection terminal of switch Q2 is grounded.

[0119] The first connection terminal of the secondary winding of transformer T1 is connected to the anode of diode D1. The cathode of diode D1 is grounded (specifically, connected to signal ground) via capacitor C3. The cathode of diode D1 also serves as the voltage output terminal Vo+, connected to the first connection terminal of DC voltage output interface 12. The second connection terminal of the secondary winding of transformer T1 is connected to the anode of diode D2. The cathode of diode D2 is connected to the cathode of diode D1. The center tap of the secondary winding of transformer T1 is grounded (specifically, connected to signal ground). The center tap of the secondary winding of transformer T1 is also connected to the second connection terminal of DC voltage output interface 12 via sampling resistor R0. The signal at the voltage output terminal Vo+, the signal at the center tap of the secondary winding of transformer T1 (i.e., the signal at the first connection terminal of sampling resistor R0), and the signal at the second connection terminal of sampling resistor R0 are used as the first feedback signal (i.e., feedback signal 1) and input to the first input terminal of MCU control module 13. The first connection terminal of DC voltage output interface 12 is connected to the first input terminal of interface detection module 15. The second connection terminal of the DC voltage output interface 12 is connected to the second input terminal of the interface detection module 15. The output terminal of the interface detection module 15, as a second feedback signal (such as feedback signal 2), is input to the second input terminal of the MCU control module 13. The first output terminal of the MCU control module 13 is connected to the control terminal of switch Q1, and the control terminal of switch Q1 is connected to the second connection terminal of switch Q1. The second output terminal of the MCU control module 13 is connected to the control terminal of switch Q2, and the control terminal of switch Q2 is connected to the second connection terminal of switch Q2. The first power supply terminal of the power supply module 14 is connected to the power supply terminal of the MCU control module 13. The second power supply terminal of the power supply module 14 is connected to the power supply terminal of the interface detection module 14.

[0120] The control method for the DC socket includes steps S110 to S130.

[0121] In step S110, the electrical parameters of the DC input interface are detected and recorded as the first electrical parameter, for example, by using a DC input interface detection circuit. The electrical parameters of the DC output interface are also detected and recorded as the second electrical parameter, for example, by using a DC output interface detection circuit. Finally, the impedance parameters of the DC output interface are detected, for example, by using an impedance detection circuit.

[0122] In step S120, it is determined whether there is a load connected to the DC output interface based on the impedance parameters of the DC output interface.

[0123] In some embodiments, the impedance parameters of the DC output interface include: no-load impedance and current impedance. The no-load impedance is the impedance when no load is connected between the positive and negative terminals of the DC output interface. The current impedance is the impedance between the positive and negative terminals of the DC output interface as currently measured.

[0124] The specific process of determining whether a load is connected to the DC output interface based on the impedance parameters of the DC output interface in step S120 can be found in the following exemplary description.

[0125] The following is combined with Figure 3 The flowchart shown is a schematic diagram of an embodiment of the method of the present invention for determining whether a load is connected to the DC output interface. The specific process of determining whether a load is connected to the DC output interface in step S120 is further explained, including steps S210 and S220.

[0126] Step S210: Determine the impedance difference between the unloaded impedance and the current impedance.

[0127] Step S220: If the impedance difference meets the set impedance range, then it is determined that the DC output interface has a load connected.

[0128] The analysis of the load connection status is as follows: First, the change in interface impedance ΔZ = Z0 - Z is calculated through the impedance detection circuit. Z0 is the impedance between the positive and negative terminals when there is no load connected, and Z is the real-time detection value. The change in ΔZ indicates that there is a load connected to the interface.

[0129] For example, when there is no load connected, the value of Z0 is stable. When an external electrical load is connected to the interface, Z0 will increase or decrease. For example, if a resistor R1 is connected to the interface, the interface impedance becomes Z0, and the parallel impedance of the resistor R1 is Z, where ΔZ = |Z0 - Z|. The presence of a load can be determined by comparing three detection values. When the load is unplugged, the output current decreases to 0, and the impedance detection value between the positive and negative terminals is Z0, indicating that there is no load connected. Z0 varies depending on the load. However, generally, if ΔZ is greater than or equal to 5% of Z0, it is considered that a load is connected.

[0130] In step S130, when it is determined that a load is connected to the DC output interface, the drive signal of the DC / DC conversion module is controlled according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface, that is, to adjust the magnitude of the output voltage of the DC output interface and the change time of the output voltage of the DC output interface.

[0131] Specifically, the socket panel 1 is equipped with a DC / DC conversion module 7, whose main function is to isolate and convert high-voltage power supply, such as 375VDC / 400VDC, to low-voltage 48VDC. The DC socket conversion unit collects electrical parameters such as voltage, current, and impedance of the DC input interface and DC output interface, analyzes the power supply status of the socket, and adjusts the start-up and steady-state voltage values ​​of the output voltage to achieve flexible adjustment and safe stability of the DC voltage of the socket output interface, and provides overload and short-circuit protection functions.

[0132] exist Figure 9 In the example shown, the main functions of the DC socket conversion unit include: acquiring parameters such as voltage, current, power, and impedance of the DC input and output interfaces through a sampling circuit; analyzing the load connection status based on these parameters; calculating the load size by detecting the electrical parameters of the power supply circuit inside the DC socket, and adjusting the rise time and magnitude of the output DC voltage; and dynamically adjusting the voltage value within a set range to achieve load response regulation of the interface voltage.

[0133] Specifically, calculating the load size and adjusting the rise time and magnitude of the output DC voltage includes: when the load is running, calculating the load power value by detecting the voltage and current magnitudes, and adjusting the interface output voltage value based on the magnitude and changes of the power value.

[0134] Figure 10 This is a schematic diagram illustrating the workflow of one embodiment of a DC-DC socket conversion unit. Figure 10 As shown, the working process of the DC-DC adapter unit includes:

[0135] Step 1: Turn on the input voltage.

[0136] Step 2: Power supply module 14 is activated.

[0137] Step 3: Initialize the MCU control module 13 and set the initial standby state.

[0138] Step 4: Interface detection module 15 detects the status of DC output interface 2.

[0139] Step 5: Determine if there is a load connected to DC output interface 2: If yes, proceed to step 6. Otherwise, return to step 3.

[0140] Step 6: The MCU control module 13 outputs a drive signal to control the main circuit of the DC socket conversion unit to work and establish the output voltage.

[0141] like Figure 9 and Figure 10As shown, in the internal conversion unit of the socket (i.e., the DC socket conversion unit), the input voltage Vin on the input side of the internal conversion unit is preferably a DC voltage, such as 375VDC or 400VDC. A protection circuit is provided on the input side, such as adding a DC fuse as an input protection module 11, or adding a diode, rectifier bridge, or similar switching device as an input protection module 11 to achieve reverse connection protection of the input voltage, thereby increasing the reliability of the Vin DC power supply bus. The internal conversion unit of the socket preferably adopts a high-efficiency DC / DC topology (i.e., DC / DC conversion module 07), such as LLC, bridge circuit, etc.

[0142] The interface detection module 15 is used to identify whether a load is connected to the output interface, and the signal is fed back to the MCU for judgment and control. Specifically, in the socket internal conversion unit (i.e., DC socket conversion unit), on the output side of the socket internal conversion unit, there are DC socket control circuits, current detection circuits, and impedance detection circuits used to determine whether a load is connected to the output interface. The sampling signal has a separate feedback loop, preferably using optocouplers, isolation chip circuits, etc. as the feedback loops for signal feedback 1 and signal feedback 2. The main function of the power supply module 14 is to provide auxiliary power to the MCU control module 13 and the detection sampling module (i.e., interface detection module 15). By identifying the status of the output interface and calculating the load power, the value of the output voltage Uo is adjusted to realize different working modes. The output voltage Uo can be autonomously adjusted within a set range to match different load sizes and improve the stability of the interface output voltage.

[0143] The present invention provides a circuit and control method for a flexible DC power socket. By collecting parameters such as voltage, current, power, and impedance from the DC input and output interfaces, the system analyzes the load connection status, calculates the load size through circuit power parameter detection, and adjusts the rise time and magnitude of the output DC voltage. Furthermore, the voltage value can be dynamically varied within a specified range to accommodate different load sizes. This enables the DC socket's output voltage to achieve proactive response and flexible adjustment within a defined range, improving the stability of the DC power supply system and solving the problems of DC sockets lacking proactive voltage response and flexible load adjustment.

[0144] In some implementations, the electrical parameters in the first and second electrical parameters include voltage and current.

[0145] Step S130 involves controlling the drive signal of the DC / DC conversion module based on the first and second electrical parameters to adjust the magnitude and timing of the output voltage of the DC output interface. This includes a light-load control process, specifically: when a load is connected to the DC output interface and the load is powered using the output voltage of the DC socket, the DC / DC conversion module is controlled to operate, causing the voltage of the DC output interface to rise to a first set voltage at a first set time, thereby starting the load. The first set voltage is greater than a minimum set voltage and less than the rated voltage of the DC output interface.

[0146] Figure 11 This is a schematic diagram of the voltage regulation waveform of an embodiment of the DC output interface in a DC socket conversion unit. The following is in conjunction with... Figure 11 The example shown illustrates the control process of the output voltage rise in the DC socket, and more specifically the flexible DC power supply socket, under no-load, light-load, normal load, and abnormal conditions.

[0147] In the first scenario: under no-load mode, the DC socket is in standby mode, the indicator light displays the second set color light (such as yellow light), and the output voltage Uo of DC output interface 2 is 0V.

[0148] The second scenario: Light load mode, such as Figure 11 As shown, at time t0, the DC output interface 2 is connected to a load. The impedance detection circuit in the interface detection module 15 identifies the interface impedance change value ΔZ, determining that the DC output interface 2 is connected to a load. The DC / DC conversion module 7 operates, and the voltage of the DC output interface 2 rises. At time t1, the voltage of the DC output interface 2 rises to the first set voltage U1. At this time, the voltage of the DC output interface 2 satisfies the minimum set voltage Umin < the first set voltage U1 < the rated output voltage Uo, and the load starts. Using the power P calculation formula P = U * I, where U is voltage and I is current, the power of the load P1 is calculated. When P1 < 0.2Po, Po is the rated power, and the output voltage U1 of the DC output interface 2 operates stably. The time from t0 to t1 is within 500ms. t0 is the initial time, and t1 is the first set time.

[0149] In some implementations, step 130, which controls the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface, also includes a first heavy load control process.

[0150] The following is combined with Figure 4Schematic diagram of a process of an embodiment of the first overload control in the method of the present invention, further illustrating the specific process of the first overload control, which may include: steps S310 to S320.

[0151] Step S310, when the voltage of the DC output interface rises to a first set voltage at a first set time and the load starts, determine the power of the load according to the voltage and current in the second electrical parameter.

[0152] Step S320, if the power of the load rises to be greater than or equal to a set multiple of the rated power and less than or equal to the rated power, control the voltage of the DC output interface to rise to the rated voltage at a second set time.

[0153] The third case: when the current of the load continues to increase, if the power magnitude P1 of the load satisfies: 0.2Po ≤ P1 ≤ Po, the output voltage of the DC output interface 2 increases, reaches the rated voltage U0 at time t2, and operates stably. From t1 to t2, the adjustment can be completed within 1 s. t2 is the second set time.

[0154] In some embodiments, in step 130, according to the first electrical parameter and the second electrical parameter, controlling the driving signal of the DC / DC conversion module to adjust the magnitude and change time of the output voltage of the DC output interface further includes: the process of the second overload control.

[0155] The following combines Figure 5 Schematic diagram of a process of an embodiment of the second overload control in the method of the present invention, further illustrating the specific process of the second overload control, which may include: steps S410 to S420.

[0156] Step S410, when the voltage of the DC output interface rises to the rated voltage at a second set time, continue to determine the power of the load according to the voltage and current in the second electrical parameter.

[0157] Step S420, if the power of the load rises to be greater than the rated power and less than or equal to the maximum set power, control the voltage of the DC output interface to rise to a second set voltage at a third set time. The second set voltage is greater than the rated voltage and less than or equal to the maximum set voltage.

[0158] The fourth case: when Po < P1 ≤ Pmax, the output voltage of the DC output interface 2 is raised to the second set voltage U2 at time t3 for operation, satisfying Uo < U2 ≤ Umax. t3 is the third set time.

[0159] Among them, Umin can be selected as 36V, and Umax can be selected as 53V. U1 can be selected from 36 to 48V, preferably 42V. U2 can be selected from 48 to 53V, preferably 50V.

[0160] In some embodiments, in step 130, according to the first electrical parameter and the second electrical parameter, controlling the driving signal of the DC / DC conversion module to adjust the magnitude and change time of the output voltage of the DC output interface further includes: a process of third overload control.

[0161] The following Figure 6 shows a schematic flowchart of an embodiment of the third overload control in the method of the present invention, and further illustrates the specific process of the third overload control, which may include: step S510 to step S520.

[0162] Step S510, when the voltage of the DC output interface rises to the second set voltage at the third set moment, continue to determine the power of the load according to the voltage and current in the second electrical parameter.

[0163] Step S520, if the power of the load rises to be greater than the maximum set power, control the voltage of the DC output interface to decrease until the voltage of the DC output interface decreases to be less than the minimum set voltage, then control the DC output interface to disconnect the output and initiate a reminder message that the DC socket is in a fault state.

[0164] The fifth case: When the power magnitude P1 of the load satisfies that the load power P1 exceeds the socket set protection value Pmax, the output voltage of the DC output interface 2 decreases. When the output voltage Uo of the DC output interface 2 < Umin, the output is disconnected. At the same time, the third set color light (such as a red light) of the socket indicator flashes to indicate the fault state.

[0165] In the solution of the present invention, for the output voltage or load response control of the flexible DC power supply socket, specifically when the output voltage of the DC output interface 2 is operating stably, a flexible load adjustment signal can be transmitted through the change value of the output voltage of the DC output interface 2 to achieve the adjustment function of the DC socket load response. For example: when the socket output voltage is the rated value Uo, the output load power is the rated power Po. At this time, the output voltage of the socket interface decreases to the first set voltage U1, and the corresponding load power actively responds and reduces the operating power to the first set power P1. At this time, the first set power P1 < the rated power Po.

[0166] Of course, the adjustable electrical parameters of the DC output interface 2 are not limited to the flexible adjustment of voltage, but can also be the adjustment of the output current magnitude.

[0167] In some implementations, step 130, which controls the drive signal of the DC / DC conversion module according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface, further includes: an adaptation input capability control process, specifically including: when the voltage of the DC output interface rises to a first set voltage at a first set time and the load is started, if the voltage and / or current in the first electrical parameter decreases, then the voltage and / or current output by the DC output interface is adapted to decrease.

[0168] In the solution of this invention, the waveform and / or data of the socket voltage, current, and power can be detected to determine whether the increase in the interface output voltage or current value can automatically adjust to the load size. Figure 11 As shown, does it have the function of voltage / current regulation to transmit load response signals during steady-state operation? The specific judgment process is as follows:

[0169] The first step is to identify the load connection at the output interface by connecting and disconnecting a load, and then testing the interface voltage waveform and value. When no load is connected, the output voltage is 0 or a very small voltage. When a load is connected, the voltage waveform is similar to... Figure 11 The rising waveform changes with the load power, and the output port voltage value will also change accordingly.

[0170] The second step involves the input voltage decreasing during stable operation, which in turn causes the output voltage to decrease. The load detects this voltage change and reduces its operating power, thus achieving flexible DC power regulation. The difference lies in the fact that in related solutions, the output voltage remains constant or changes are achieved through communication or other means when the input voltage varies within a certain range. In contrast, the flexible DC power supply transmits load regulation signals based on changes in the bus voltage, allowing the load to respond by adjusting its power output.

[0171] In this invention, by collecting electrical parameters such as the impedance at both ends of the interface, the system determines whether a load is connected and implements output voltage mode switching control, reducing the current surge caused by direct connection. This effectively reduces the current surge generated when a load is connected to the socket, improving DC power safety and interface lifespan. It solves the problem of excessive current surge when a load is connected to a DC socket, thus improving interface lifespan and safety.

[0172] Since the processing and functions implemented by the method in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned DC socket, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0173] The technical solution of this embodiment detects the electrical parameters of the DC output interface in the socket interface of the DC socket, including voltage, current and impedance. Based on the detected impedance, it is determined whether a load is connected to the DC output interface. If a load is connected, the power of the load is determined based on the detected voltage and current. The output voltage of the DC socket is established based on the power of the load, and the rise time and magnitude of the output voltage of the DC socket are adjusted to dynamically regulate the output voltage of the DC socket within a set range. The output voltage of the DC socket is then used to supply power to the load. This enables the output voltage of the DC socket to achieve active response and flexible adjustment within a range, which is beneficial to the stability of the DC power supply system.

[0174] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0175] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A control device for a DC socket, characterized in that, The DC socket includes: a DC input interface, a DC / DC conversion module, and a DC output interface; the DC / DC conversion module is capable of performing DC / DC conversion on a first DC power input from the DC input interface, and outputting the converted second DC power from the DC output interface; The control device for the DC socket includes: a detection unit and a control unit; wherein, The detection unit is configured to detect the electrical parameters of the DC input interface, denoted as the first electrical parameter; detect the electrical parameters of the DC output interface, denoted as the second electrical parameter; and detect the impedance parameters of the DC output interface. The control unit is configured to determine whether a load is connected to the DC output interface based on the impedance parameters of the DC output interface; and, When it is determined that a load is connected to the DC output interface, the drive signal of the DC / DC conversion module is controlled according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface; The system detects the voltage, current, and impedance of the DC output interface in the socket of the DC socket. Based on the detected impedance, it determines whether a load is connected to the DC output interface. If a load is connected, it determines the power of the load based on the detected voltage and current, establishes the output voltage of the DC socket based on the power of the load, and adjusts the rise time and magnitude of the output voltage of the DC socket to dynamically regulate the output voltage of the DC socket within a set range, and uses the output voltage of the DC socket to power the load. When the output voltage of a DC socket is used to power the load, the voltage and current of the DC output interface of the DC socket are detected. Based on the input power of the DC socket, the supply voltage of the load is adjusted so that if the input electrical parameters of the DC socket decrease when the load is running stably, the output electrical parameters of the DC output interface of the DC socket will also decrease accordingly, so that the load can respond to the adjustment signal to change the power.

2. The control device for the DC socket according to claim 1, characterized in that, The impedance parameters of the DC output interface include: no-load impedance and current impedance; The control unit determines whether a load is connected to the DC output interface based on the impedance parameters of the DC output interface, including: Determine the impedance difference between the unloaded impedance and the current impedance; If the impedance difference meets the set impedance range, then it is determined that the DC output interface has a load connected.

3. The control device for a DC socket according to claim 1 or 2, characterized in that, The electrical parameters in the first electrical parameter and the second electrical parameter include: voltage and current; The control unit, based on the first electrical parameter and the second electrical parameter, controls the drive signal of the DC / DC conversion module to adjust the magnitude and change time of the output voltage of the DC output interface, including: When the load is powered by the output voltage of the DC socket, the DC / DC conversion module is controlled to operate, so that the voltage of the DC output interface rises to a first set voltage at a first set time, so as to start the load; the first set voltage is greater than the minimum set voltage and less than the rated voltage of the DC output interface.

4. The control device for the DC socket according to claim 3, characterized in that, The control unit, based on the first electrical parameter and the second electrical parameter, controls the drive signal of the DC / DC conversion module to adjust the magnitude and change time of the output voltage of the DC output interface, and further includes: When the voltage at the DC output interface rises to a first set voltage at a first set time and the load is started, the power of the load is determined based on the voltage and current in the second electrical parameters. If the power of the load rises to a value greater than or equal to a set factor multiple of the rated power, but less than or equal to the rated power, the voltage of the DC output interface is controlled to rise to the rated voltage at a second set time.

5. The control device for the DC socket according to claim 4, characterized in that, The control unit, based on the first electrical parameter and the second electrical parameter, controls the drive signal of the DC / DC conversion module to adjust the magnitude and change time of the output voltage of the DC output interface, and further includes: If the voltage at the DC output interface rises to the rated voltage at a second set time, the power of the load is determined based on the voltage and current in the second electrical parameters. If the power of the load rises to a level greater than the rated power and less than or equal to the maximum set power, the voltage of the DC output interface is controlled to rise to a second set voltage at a third set time; the second set voltage is greater than the rated voltage and less than or equal to the maximum set voltage.

6. The control device for a DC socket according to claim 5, characterized in that, The control unit, based on the first electrical parameter and the second electrical parameter, controls the drive signal of the DC / DC conversion module to adjust the magnitude and change time of the output voltage of the DC output interface, and further includes: If the voltage at the DC output interface rises to the second set voltage at a third set time, the power of the load is determined based on the voltage and current in the second electrical parameters. If the power of the load rises to a level greater than the maximum set power, the voltage of the DC output interface is controlled to decrease until the voltage of the DC output interface decreases to a level less than the minimum set voltage. Then, the voltage of the DC output interface is controlled to disconnect, and a reminder message indicating that the DC socket is in a fault state is initiated.

7. The control device for a DC socket according to any one of claims 4 to 6, characterized in that, The control unit, based on the first electrical parameter and the second electrical parameter, controls the drive signal of the DC / DC conversion module to adjust the magnitude and change time of the output voltage of the DC output interface, and further includes: When the voltage of the DC output interface rises to a first set voltage at a first set time and the load is started, if the voltage and / or current in the first electrical parameters decrease, the voltage and / or current output by the DC output interface shall be appropriately reduced.

8. A DC socket, characterized in that, include: The control device for a DC socket as described in any one of claims 1 to 7.

9. A method for controlling a DC socket using a control device for a DC socket as described in any one of claims 1 to 7, characterized in that, The DC socket includes: a DC input interface, a DC / DC conversion module, and a DC output interface; the DC / DC conversion module is capable of performing DC / DC conversion on a first DC power input from the DC input interface, and outputting the converted second DC power from the DC output interface; The control method for the DC socket includes: The electrical parameters of the DC input interface are detected and recorded as the first electrical parameter; the electrical parameters of the DC output interface are detected and recorded as the second electrical parameter; and the impedance parameter of the DC output interface is detected. Based on the impedance parameters of the DC output interface, determine whether a load is connected to the DC output interface; and, When it is determined that a load is connected to the DC output interface, the drive signal of the DC / DC conversion module is controlled according to the first electrical parameter and the second electrical parameter to adjust the magnitude and change time of the output voltage of the DC output interface.

10. The control method for a DC socket according to claim 9, characterized in that, The impedance parameters of the DC output interface include: no-load impedance and current impedance; Determining whether a load is connected to the DC output interface based on its impedance parameters includes: Determine the impedance difference between the unloaded impedance and the current impedance; If the impedance difference meets the set impedance range, then it is determined that the DC output interface has a load connected.

11. The control method for a DC socket according to claim 9 or 10, characterized in that, The electrical parameters in the first electrical parameter and the second electrical parameter include: voltage and current; Based on the first electrical parameter and the second electrical parameter, the drive signal of the DC / DC conversion module is controlled to adjust the magnitude and change time of the output voltage of the DC output interface, including: When the load is powered by the output voltage of the DC socket, the DC / DC conversion module is controlled to operate, so that the voltage of the DC output interface rises to a first set voltage at a first set time, so as to start the load; the first set voltage is greater than the minimum set voltage and less than the rated voltage of the DC output interface.

12. The control method for a DC socket according to claim 11, characterized in that, Based on the first electrical parameter and the second electrical parameter, the drive signal of the DC / DC conversion module is controlled to adjust the magnitude and change time of the output voltage of the DC output interface, and the method further includes: When the voltage at the DC output interface rises to a first set voltage at a first set time and the load is started, the power of the load is determined based on the voltage and current in the second electrical parameters. If the power of the load rises to a value greater than or equal to a set factor multiple of the rated power, but less than or equal to the rated power, the voltage of the DC output interface is controlled to rise to the rated voltage at a second set time.

13. The control method for a DC socket according to claim 12, characterized in that, Based on the first electrical parameter and the second electrical parameter, the drive signal of the DC / DC conversion module is controlled to adjust the magnitude and change time of the output voltage of the DC output interface, and the method further includes: If the voltage at the DC output interface rises to the rated voltage at a second set time, the power of the load is determined based on the voltage and current in the second electrical parameters. If the power of the load rises to a level greater than the rated power and less than or equal to the maximum set power, the voltage of the DC output interface is controlled to rise to a second set voltage at a third set time; the second set voltage is greater than the rated voltage and less than or equal to the maximum set voltage.

14. The control method for a DC socket according to claim 13, characterized in that, Based on the first electrical parameter and the second electrical parameter, the drive signal of the DC / DC conversion module is controlled to adjust the magnitude and change time of the output voltage of the DC output interface, and the method further includes: If the voltage at the DC output interface rises to the second set voltage at a third set time, the power of the load is determined based on the voltage and current in the second electrical parameters. If the power of the load rises to a level greater than the maximum set power, the voltage of the DC output interface is controlled to decrease until the voltage of the DC output interface decreases to a level less than the minimum set voltage. Then, the voltage of the DC output interface is controlled to disconnect, and a reminder message indicating that the DC socket is in a fault state is initiated.

15. The control method for a DC socket according to any one of claims 12 to 14, characterized in that, Based on the first electrical parameter and the second electrical parameter, the drive signal of the DC / DC conversion module is controlled to adjust the magnitude and change time of the output voltage of the DC output interface, and the method further includes: When the voltage of the DC output interface rises to a first set voltage at a first set time and the load is started, if the voltage and / or current in the first electrical parameters decrease, the voltage and / or current output by the DC output interface shall be appropriately reduced.

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