Power supply control circuit and distribution box

Abstract

The invention provides a power supply control circuit and a distribution box, and the circuit comprises a plurality of high-voltage DC power supplies which are used for providing a first DC input voltage; the sensor module is used for feeding back the collected voltage analog quantity and current analog quantity to the display control module; the display control module is used for displaying the voltage digital quantity and the current digital quantity; the controller is also used for controlling opening and closing of the incoming circuit breaker and the branching circuit breaker according to the device control instruction; the anti-reverse diode is used for providing reverse power supply protection for the plurality of high-voltage direct-current power supplies; the incoming circuit breaker is used for carrying out voltage protection and current protection on the main loop; the direct-current busbar is used for fusing the first direct-current input voltages provided by the plurality of high-voltage direct-current power supplies; the plurality of output branches are used for distributing power for a load; and the branching circuit breaker is used for carrying out voltage protection and current protection on the output branches. According to the embodiment of the invention, the power utilization reliability of the equipment on the vehicle is improved, and the performance of the vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply and distribution, and in particular to a power supply control circuit and a distribution box. Background Art

[0002] In the related technology, the design idea of ​​the distribution box is to divide the input high-voltage DC power into several paths to supply power to the output load through contactors or relays according to actual needs, and then manually control the auxiliary line package of the contactor or relay through a button switch or remotely control the control device to close the main circuit power supply to realize the power distribution of the distribution box. At the same time, the DC bus voltage, current information and leakage current in the distribution box are monitored in real time to realize fault diagnosis on the line, and then the power-on state of the branch is disconnected manually or automatically. Human intervention or delayed processing is required in the protection of branch power distribution. Summary of the invention

[0003] In view of the above problems, an embodiment of the present invention provides a power supply control circuit and a distribution box to solve the problem in the prior art that human intervention or delayed processing is required in the protection of branch power distribution.

[0004] In a first aspect, an embodiment of the present invention provides a power supply control circuit, the power supply control circuit comprising:

[0005] A plurality of high-voltage DC power supplies, used for providing a first DC input voltage to the power supply control circuit;

[0006] The sensor module is used to collect the voltage analog quantity and the current analog quantity of the input port, and feed back the voltage analog quantity and the current analog quantity to the display control module;

[0007] A display control module, used to convert the voltage analog quantity into a voltage digital quantity, convert the current analog quantity into a current digital quantity, and display the voltage digital quantity and the current digital quantity; and also used to generate a device control instruction according to the acquired host computer control instruction, and control the opening and closing of the incoming circuit breaker and the branch circuit breaker according to the device control instruction;

[0008] An anti-reverse diode, used to provide reverse power supply protection for the multiple high-voltage direct current power supplies;

[0009] Incoming circuit breaker, used to control the power on or off of the main circuit, and to provide voltage and current protection for the main circuit;

[0010] A DC busbar, used to integrate the first DC input voltage provided by the multiple high-voltage DC power supplies;

[0011] Multiple output branches for distributing power to loads;

[0012] The branch circuit breaker is used to control the power on or off of the output branch and perform voltage protection and current protection on the output branch.

[0013] In a possible implementation, the multiple high-voltage DC power supplies are electrically connected to the sensor module;

[0014] The sensor module is electrically connected to the display control module and the anti-reverse diode respectively;

[0015] The anti-reverse diode is electrically connected to the incoming line circuit breaker;

[0016] The incoming line circuit breaker is electrically connected to the display control module and the DC busbar respectively;

[0017] The branch circuit breaker is electrically connected to the display control module, the DC busbar and the load respectively.

[0018] In a possible implementation manner, the power supply control circuit further includes:

[0019] A low-voltage DC power supply, used for providing a second DC input voltage for the auxiliary power supply module;

[0020] The auxiliary power supply module is electrically connected to the display control module and the low-voltage DC power supply respectively, and is used to stabilize and filter the second DC input voltage to provide a stable second DC input voltage for the low-voltage electrical equipment in the power supply control circuit.

[0021] In a possible implementation manner, the power supply control circuit further includes:

[0022] The Ethernet communication module is electrically connected to the display control module and is used to convert the acquired Ethernet data into controller area network (CAN) bus data recognizable by the display control module.

[0023] In a possible implementation, the sensor module and the display control module communicate with each other via a CAN bus.

[0024] In a possible implementation, the power supply control circuit further includes a CAN communication module electrically connected to the display control module and configured to implement CAN communication with an external device.

[0025] In a possible implementation, the sensor module includes a voltage sensor and a current sensor;

[0026] The voltage sensor is used to collect the voltage analog quantity of the input port and feed the voltage analog quantity back to the display control module;

[0027] The current sensor is used to collect the current analog quantity of the input port and feed the current analog quantity back to the display control module.

[0028] In a possible implementation, the device control instruction includes an incoming circuit breaker opening instruction or an incoming circuit breaker closing instruction;

[0029] The incoming circuit breaker is specifically used to cut off the power supply of the main circuit in response to the incoming circuit breaker opening instruction; or, to connect the power supply of the main circuit in response to the incoming circuit breaker closing instruction.

[0030] In a possible implementation, the device control instruction includes a branch circuit breaker opening instruction or a branch circuit breaker closing instruction;

[0031] The branch circuit breaker is specifically used to cut off the power supply of the output branch in response to the branch circuit breaker opening instruction; or, to connect the power supply of the output branch in response to the branch circuit breaker closing instruction.

[0032] In a second aspect, an embodiment of the present invention provides a distribution box, the distribution box comprising:

[0033] Multiple status indicators to indicate different status of the distribution box;

[0034] Input control button, used to control the closing or opening of the high voltage DC power supply;

[0035] The load control button is used to control the power on or off of the output branch where the load is located.

[0036] In the technical solution provided by the embodiment of the present invention, the voltages input by two high-voltage DC power supplies are effectively distributed and then output, thereby achieving reliable redundant power supply for vehicle-mounted equipment, improving the reliability of power consumption of vehicle-mounted equipment, and improving the performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A connection diagram of a power supply control circuit provided by an embodiment of the present invention.

[0038] Figure 2 A connection diagram of another power supply control circuit provided by an embodiment of the present invention.

[0039] Figure 3 A schematic diagram of a distribution box provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer and more understandable, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Figure 1 A connection diagram of a power supply control circuit provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the power supply control circuit includes: multiple high-voltage DC power supplies 11, a sensor module 12, a display control module 13, an anti-reverse diode 14, an incoming line circuit breaker 15, a DC busbar 16, a branch line circuit breaker 17 and a load 18. The multiple high-voltage DC power supplies 11 are electrically connected to the sensor module 12; the sensor module 12 is electrically connected to the display control module 13 and the anti-reverse diode 14 respectively; the anti-reverse diode 14 is electrically connected to the incoming line circuit breaker 15; the incoming line circuit breaker 15 is electrically connected to the display control module 13 and the DC busbar 16 respectively; the branch line circuit breaker 17 is electrically connected to the display control module 13, the DC busbar 16 and the load 18 respectively.

[0042] In an embodiment of the present invention, multiple high-voltage DC power supplies 11 are used to provide a first DC input voltage for a power supply control circuit; a sensor module 12 is used to collect voltage analog quantities and current analog quantities of an input port, and feed the voltage analog quantities and current analog quantities back to a display control module 13; the display control module 13 is used to convert the voltage analog quantity into a voltage digital quantity, convert the current analog quantity into a current digital quantity, and display the voltage digital quantity and the current digital quantity; it is also used to generate a device control instruction according to the acquired host computer control instruction, and control the opening and closing of the incoming circuit breaker 15 and the branch circuit breaker 17 according to the device control instruction; an anti-reverse diode 14 is used to provide reverse power supply protection for the multiple high-voltage DC power supplies 11; the incoming circuit breaker 15 is used to control the power on or off of the main circuit, and perform voltage protection and current protection on the main circuit; a DC busbar 16 is used to integrate the first DC input voltage provided by the multiple high-voltage DC power supplies 11; multiple output branches are used to distribute power to a load 18; and the branch circuit breaker 17 is used to control the power on or off of the output branch, and perform voltage protection and current protection on the output branch.

[0043] Specifically, the sensor module 12 includes a voltage sensor and a current sensor; the voltage sensor is used to collect the voltage analog quantity of the input port and feed the voltage analog quantity back to the display control module 13; the current sensor is used to collect the current analog quantity of the input port and feed the current analog quantity back to the display control module 13.

[0044] Optionally, the device control instruction includes an incoming circuit breaker disconnect instruction or an incoming circuit breaker closing instruction; the incoming circuit breaker 15 is specifically used to cut off the power supply of the main circuit in response to the incoming circuit breaker disconnect instruction; or, in response to the incoming circuit breaker closing instruction, connect the power supply of the main circuit. The main circuit includes multiple high-voltage DC power supplies 11, a sensor module 12, an anti-reverse diode 14 and an incoming circuit breaker 15.

[0045] Optionally, the device control instruction includes a branch breaker opening instruction or a branch breaker closing instruction; the branch breaker 17 is specifically used to cut off the power supply of the output branch in response to the branch breaker opening instruction; or, in response to the branch breaker closing instruction, connect the power supply of the output branch.

[0046] In practical applications, the branch circuit breaker is selected according to the power of the load to avoid failure of overload protection due to over-selection. In the embodiment of the present invention, both the incoming circuit breaker and the branch circuit breaker have manual opening and closing functions and electric opening and closing functions.

[0047] In the embodiment of the present invention, the power supply control circuit further includes: a low-voltage DC power supply 19 and an auxiliary power supply module 20, wherein the auxiliary power supply module 20 is electrically connected to the display control module 13 and the low-voltage DC power supply 19, respectively. The low-voltage DC power supply 19 is used to provide a second DC input voltage for the auxiliary power supply module; the auxiliary power supply module 20 is used to stabilize and filter the second DC input voltage, and provide a stable second DC input voltage for the low-voltage electrical equipment in the power supply control circuit.

[0048] In the embodiment of the present invention, the power supply control circuit also includes an Ethernet communication module 21, which is electrically connected to the display control module 13 and is used to convert the acquired Ethernet data into controller area network (CAN) bus data that can be recognized by the display control module. The Ethernet communication module 21 has two independent Ethernet channels, one of which is used as a main channel and the other is used as a redundant channel. When the main channel fails and cannot be used, the redundant channel intervenes and assumes the work of the main channel to reduce the failure time.

[0049] In an embodiment of the present invention, communication transmission is achieved between the sensor module 12 and the display control module 13 via a CAN bus. The power supply control circuit also includes a CAN communication module 22, which is electrically connected to the display control module 13 and is used to achieve CAN communication with external devices. The display control module 13 has four independent CAN channels, and the four CAN channels are divided into two groups, one group is used for communication transmission with the sensor module 12, and the other group is used for communication transmission with external devices through the CAN communication module 22. Each group has two CAN channels, one CAN channel is used as the main channel, and the other CAN channel is used as a redundant channel. When the main channel fails and cannot be used, the redundant channel intervenes and assumes the work of the main channel to reduce the failure time.

[0050] In the technical solution provided by the embodiment of the present invention, the voltages input by two high-voltage DC power supplies are effectively distributed and then output, thereby achieving reliable redundant power supply for vehicle-mounted equipment, improving the reliability of power consumption of vehicle-mounted equipment, and improving the performance of the vehicle.

[0051] Figure 2 A connection diagram of another power supply control circuit provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the power supply control circuit includes multiple high-voltage DC power supplies and sensor modules. The multiple high-voltage DC power supplies include a first high-voltage DC power supply 111 and a second high-voltage DC power supply 112, and the sensor module includes a first sensor module 121 and a second sensor module 122. The first high-voltage DC power supply 111 is electrically connected to the first sensor module 121, and the second high-voltage DC power supply 112 is electrically connected to the second sensor module 122.

[0052] In the embodiment of the present invention, the power supply control circuit further includes a display control module 13. The display control module 13 is used to convert the voltage analog quantity into the voltage digital quantity, convert the current analog quantity into the current digital quantity, and display the voltage digital quantity and the current digital quantity; it is also used to generate a device control instruction according to the acquired host computer control instruction, and control the opening and closing of the incoming circuit breaker and the branch circuit breaker according to the device control instruction.

[0053] In the embodiment of the present invention, the power supply control circuit further includes an anti-reverse diode, an incoming line circuit breaker, a DC busbar 16 and a branch line circuit breaker. The anti-reverse diode includes a first anti-reverse diode 141 and a second anti-reverse diode 142, the incoming line circuit breaker includes a first incoming line circuit breaker 151 and a second incoming line circuit breaker 152, and the branch line circuit breaker includes a first branch line circuit breaker 171, a second branch line circuit breaker 172, a third branch line circuit breaker 173, a fourth branch line circuit breaker 174, a fifth branch line circuit breaker 175 and a sixth branch line circuit breaker 176. The first anti-reverse diode 141 is electrically connected to the first sensor module 121 and the first incoming line circuit breaker 151, respectively, and the second anti-reverse diode 142 is electrically connected to the second sensor module 122 and the second incoming line circuit breaker 152, respectively. The first incoming circuit breaker 151 is electrically connected to the first branch circuit breaker 171, the second branch circuit breaker 172, the third branch circuit breaker 173, the fourth branch circuit breaker 174, the fifth branch circuit breaker 175 and the sixth branch circuit breaker 176, respectively, and the second incoming circuit breaker 152 is electrically connected to the first branch circuit breaker 171, the second branch circuit breaker 172, the third branch circuit breaker 173, the fourth branch circuit breaker 174, the fifth branch circuit breaker 175 and the sixth branch circuit breaker 176, respectively.

[0054] In the embodiment of the present invention, the anti-reverse diode separates the input positive poles of the two main circuits, protecting the high-voltage DC power supply from being reversely supplied by another high-voltage DC power supply due to voltage reduction, thereby achieving isolation between the first high-voltage DC power supply 111 and the second high-voltage DC power supply 112 so that they do not affect each other.

[0055] In the embodiment of the present invention, the DC busbar 16 is used to integrate the DC input voltage provided by the first high-voltage DC power supply 111 and the second high-voltage DC power supply 112. When any one of the two high-voltage DC power supplies provides a DC input voltage to the power supply control circuit, the DC busbar 16 is in a charged state.

[0056] In the embodiment of the present invention, the loads include a first load 181, a second load 182, a third load 183, a fourth load 184, a fifth load 185, and a sixth load 186. The first load 181 is electrically connected to the first branch circuit breaker 171, the second load 182 is electrically connected to the second branch circuit breaker 172, the third load 183 is electrically connected to the third branch circuit breaker 173, the fourth load 184 is electrically connected to the fourth branch circuit breaker 174, the fifth load 185 is electrically connected to the fifth branch circuit breaker 175, and the sixth load 186 is electrically connected to the sixth branch circuit breaker 176.

[0057] like Figure 2As shown, the various components in the power supply control circuit are electrically connected through a variety of different cables. In the embodiment of the present invention, different line colors are used to represent different cables. Among them, the black line represents the cable that provides the first DC input voltage from the high-voltage DC power supply 111, the red line represents the cable that provides the first DC input voltage from the second high-voltage DC power supply 112, the light green line represents the cable that provides input from the low-voltage DC power supply 19, the blue line represents the control cable, the purple line represents the DC busbar, the yellow line represents the high-voltage DC output, the brown line represents the CAN communication cable, and the green line represents the Ethernet communication cable.

[0058] In an embodiment of the present invention, the first high-voltage DC power supply 111 and the second high-voltage DC power supply 112 continuously supply power, and the circuits where the first incoming circuit breaker 151 and the second incoming circuit breaker 152 are located are both energized. At this time, each branch circuit breaker has two power inputs, so that redundant power supply can be provided to the load through the two power inputs.

[0059] In the technical solution provided by the embodiment of the present invention, the voltages input by two high-voltage DC power supplies are effectively distributed and then output, thereby realizing reliable redundant power supply for vehicle-mounted equipment, improving the reliability of power consumption of vehicle-mounted equipment, and improving the performance of the vehicle.

[0060] Figure 3 A schematic diagram of a distribution box provided by an embodiment of the present invention, such as Figure 3 As shown, the front of the distribution box is provided with multiple status indicator lights and multiple lighted buttons. Among them, the multiple status indicator lights include a running indicator light, a fault indicator light and two power status indicator lights. The multiple lighted buttons include a power control state button, an input control button and a load control button.

[0061] In the embodiment of the present invention, the status indicator light is used to indicate different states of the distribution box. Specifically, the operation indicator light is used to indicate the operation state of the display control module. When the operation indicator light is on, it indicates that the display control module has been powered on and can work normally; when the operation indicator light is off, it indicates that the display control module has not been powered on and cannot work normally. The fault indicator light is used to indicate the fault state of the distribution box; when the fault indicator light is on, it indicates that a fault has occurred inside the distribution box; when the fault indicator light is off, it indicates that no fault has occurred inside the distribution box.

[0062] In an embodiment of the present invention, the two power status indicator lights are respectively a first power status indicator light and a second power status indicator light. The first power status indicator light is used to indicate the input power supply status of the first high-voltage DC power supply, and the second power status indicator light is used to indicate the input power supply status of the second high-voltage DC power supply. When the power status indicator light is on, it indicates that the high-voltage DC power supply is supplying power to the distribution box; when the power input terminal indicator light is off, it indicates that the high-voltage DC power supply is not supplying power to the distribution box.

[0063] In an embodiment of the present invention, the input control button includes an input opening button and an input closing button, and each high-voltage DC power supply has a corresponding input opening button and input closing button. The input control button includes a first input closing button, a first input opening button, a second input closing button, and a second input opening button. The first input closing button and the first input opening button are respectively used to control the closing or opening of the first high-voltage DC power supply, and the second input closing button and the second input opening button are respectively used to control the closing or opening of the second high-voltage DC power supply.

[0064] In an embodiment of the present invention, the load control button includes an opening button and a closing button, and each load has a corresponding opening button and closing button. The opening button includes a first opening button, a second opening button, a third opening button, a fourth opening button, a fifth opening button, and a sixth opening button. The closing button includes a first closing button, a second closing button, a third closing button, a fourth closing button, a fifth closing button, and a sixth closing button. The opening button and the closing button are respectively used to control the power off or power on of the output branch where the load is located.

[0065] In an embodiment of the present invention, when the power-on operation is performed locally, the control power status button is pressed, and the indicator light of the control power status button lights up. When the display control module inside the distribution box works normally, the operation indicator light lights up, indicating that the display control module inside the distribution box has been started normally. When either the first high-voltage DC power supply or the second high-voltage DC power supply supplies power to the distribution box, the corresponding power status indicator light lights up after the input is stable. If there is no fault inside the distribution box, according to the input requirements and output requirements, first operate the corresponding input closing button, and then operate the closing button of the corresponding load to complete the power distribution. If a fault occurs inside the distribution box, the fault indicator light lights up, and the light color is red, so as to effectively remind the maintenance personnel that a fault has occurred inside the distribution box.

[0066] In the embodiment of the present invention, when the local power-off operation is performed, the disconnect button of the corresponding load is operated first, and then the corresponding input disconnect button is operated. The control power state button is pressed, and the indicator light of the control power state button goes out, and the operation indicator light goes out.

[0067] In the embodiment of the present invention, after pressing the control power state button locally, the distribution box can be powered on or off remotely. When the remote control power-on operation is performed, according to the power-on control instruction input by the user through the remote software operation interface, the corresponding input closing button is operated first, and then the closing button of the corresponding load is operated. When the remote control power-off operation is performed, according to the power-off control instruction input by the user through the remote software operation interface, the opening button of the corresponding load is operated first, and then the corresponding input opening button is operated.

[0068] In the embodiment of the present invention, when problems occur in local control and remote control, after confirming that there is no high-voltage DC power input to the distribution box, the distribution box is disassembled with proper protection, and the incoming circuit breaker and the branch circuit breaker are manually closed to implement emergency operation, thereby improving the safety of the distribution box.

[0069] In the embodiment of the present invention, a fault buzzer is also provided on the front of the distribution box, and the fault buzzer is used to emit a buzzer sound when a fault occurs in the distribution box, so as to remind the user that a fault occurs in the distribution box.

[0070] In the embodiment of the present invention, the fault reset button is used to clear the fault state.

[0071] In the embodiment of the present invention, an upgrade test interface is also provided on the front of the distribution box, and the upgrade test interface is used to implement software testing and upgrading.

[0072] In the embodiment of the present invention, the left and right sides of the distribution box are screwed and fixed by four mounting feet. A quick-connect aviation plug is used at the rear of the distribution box to facilitate plugging and maintenance. In addition, different types of aviation plugs are selected according to the power size of the load to distinguish, prevent different loads from being plugged into the wrong interface, and improve the user experience.

[0073] In the technical solution provided by the embodiment of the present invention, the voltages input by two high-voltage DC power supplies are effectively distributed and then output, thereby achieving reliable redundant power supply for vehicle-mounted equipment, improving the reliability of power consumption of vehicle-mounted equipment, and improving the performance of the vehicle.

[0074] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A power supply control circuit, characterized in that: The power supply control circuit comprises: A plurality of high-voltage DC power supplies, used for providing a first DC input voltage to the power supply control circuit; The sensor module is used to collect the voltage analog quantity and the current analog quantity of the input port, and feed back the voltage analog quantity and the current analog quantity to the display control module; A display control module, used to convert the voltage analog quantity into a voltage digital quantity, convert the current analog quantity into a current digital quantity, and display the voltage digital quantity and the current digital quantity; and also used to generate a device control instruction according to the acquired host computer control instruction, and control the opening and closing of the incoming circuit breaker and the branch circuit breaker according to the device control instruction; An anti-reverse diode, used to provide reverse power supply protection for the multiple high-voltage direct current power supplies; Incoming circuit breaker, used to control the power on or off of the main circuit, and to provide voltage and current protection for the main circuit; A DC busbar, used to integrate the first DC input voltage provided by the multiple high-voltage DC power supplies; Multiple output branches for distributing power to loads; The branch circuit breaker is used to control the power on or off of the output branch and perform voltage protection and current protection on the output branch.

2. The power supply control circuit according to claim 1, characterized in that: The multiple high-voltage DC power supplies are electrically connected to the sensor module; The sensor module is electrically connected to the display control module and the anti-reverse diode respectively; The anti-reverse diode is electrically connected to the incoming line circuit breaker; The incoming line circuit breaker is electrically connected to the display control module and the DC busbar respectively; The branch circuit breaker is electrically connected to the display control module, the DC busbar and the load respectively.

3. The power supply control circuit according to claim 1, characterized in that: The power supply control circuit also includes: A low-voltage DC power supply, used for providing a second DC input voltage for the auxiliary power supply module; The auxiliary power supply module is electrically connected to the display control module and the low-voltage DC power supply respectively, and is used to stabilize and filter the second DC input voltage to provide a stable second DC input voltage for the low-voltage electrical equipment in the power supply control circuit.

4. The power supply control circuit according to claim 1, characterized in that: The power supply control circuit also includes: The Ethernet communication module is electrically connected to the display control module and is used to convert the acquired Ethernet data into controller area network (CAN) bus data recognizable by the display control module.

5. The power supply control circuit according to claim 1, characterized in that: The sensor module and the display control module realize communication transmission via the CAN bus.

6. The power supply control circuit according to claim 1, characterized in that: The power supply control circuit also includes a CAN communication module, which is electrically connected to the display control module and is used to implement CAN communication with external devices.

7. The power supply control circuit according to claim 1, characterized in that: The sensor module includes a voltage sensor and a current sensor; The voltage sensor is used to collect the voltage analog quantity of the input port and feed the voltage analog quantity back to the display control module; The current sensor is used to collect the current analog quantity of the input port and feed the current analog quantity back to the display control module.

8. The power supply control circuit according to claim 1, characterized in that: The device control instruction includes an incoming circuit breaker opening instruction or an incoming circuit breaker closing instruction; The incoming circuit breaker is specifically used to cut off the power supply of the main circuit in response to the incoming circuit breaker opening instruction; or, to connect the power supply of the main circuit in response to the incoming circuit breaker closing instruction.

9. The power supply control circuit according to claim 1, characterized in that: The device control instruction includes a branch circuit breaker opening instruction or a branch circuit breaker closing instruction; The branch circuit breaker is specifically used to cut off the power supply of the output branch in response to the branch circuit breaker opening instruction; or, to connect the power supply of the output branch in response to the branch circuit breaker closing instruction.

10. A distribution box, characterized in that: The distribution box comprises: Multiple status indicators to indicate different status of the distribution box; Input control button, used to control the closing or opening of the high voltage DC power supply; The load control button is used to control the power on or off of the output branch where the load is located.

Images