Power supply control distribution circuit and electronic equipment

Abstract

The utility model discloses a power supply control distribution circuit and electronic equipment, which are applied to the field of power supply distribution control. The system comprises a power supply control board and at least one power supply distribution board. The first input end of the power distribution board is connected with the first output end of the corresponding switching power supply, the second input end of the power distribution board is connected with the output end of the power control board, and the first output end of the power distribution board is connected with the first end of the corresponding load; the first input end of the power supply control board is connected with the second output end of any power supply distribution board, and the second input end of the power supply control board is connected with the second output end of the switching power supply and the second end of the load; the input end of the switching power supply is connected with the commercial power port. According to the invention, through the power supply control board and the power supply distribution board, each load is powered on in sequence, thereby reducing the damage of surge to circuit devices and prolonging the service life of an instrument; meanwhile, the load and the switching power supply voltage are detected, the fault rate of the system is reduced on the whole, and the reliability of the system is improved.

Description

Technical Field

[0001] The utility model relates to the field of power distribution control, in particular to a power control distribution circuit and an electronic device. Background Art

[0002] The fully automatic chemiluminescence immunoassay analyzer contains many unit modules and has many electrical loads, such as heating modules, refrigeration modules, motion control modules, motor drives, pump valve drive modules, etc. The power supplies of these modules are all DC inputs, and the supply voltages are 12V, 24V, and 48V. If power is supplied to all modules simultaneously, a large inrush current will be generated, which will damage the devices in the circuit. In addition, if the power supply to each module load is abnormal, such as uncontrolled power supply, too high or too low supply voltage, it will damage the load and the fault points caused thereby are difficult to locate, consuming a large amount of manpower and time for maintenance, increasing the failure rate of the whole machine and reducing the reliability. When the same power supply circuit is used to supply power to the immunoassay analyzer, when the power supply fails, the whole machine will stop working, which also increases the failure rate of the whole machine and reduces the reliability, and wastes the consumables used in the test, increasing the test cost.

[0003] In view of the above technology, it is an urgent problem for those skilled in the art to seek a power control distribution circuit. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a power control distribution circuit and an electronic device, which can solve the problems of damage to devices caused by inrush current caused by jointly powering on multiple loads by multiple modules in the prior art, as well as the problems of high failure rate and low stability caused by using a single power supply circuit.

[0005] To solve the above technical problems, the utility model provides a power control distribution circuit, including: a power control board and at least one power distribution board;

[0006] Wherein, the first input end of the power distribution board is connected to the first output end of the corresponding switching power supply, the second input end of the power distribution board is connected to the output end of the power control board, and the first output end of the power distribution board is connected to the first end of the corresponding load;

[0007] The first input end of the power control board is connected to the second output end of any one power distribution board, and the second input end of the power control board is connected to the second output end of the switching power supply and the second end of the load;

[0008] The input end of the switching power supply is connected to the mains port.

[0009] Preferably, the power control board includes: a power-down interface circuit, a controller, a pre-charge control circuit, a load output control switch circuit, a load output control switch drive circuit, a load, and a switching power supply output voltage feedback circuit;

[0010] Among them, the input end of the power-down interface circuit is connected to the power-down button, and the output end of the power-down interface circuit is connected to the first input end of the controller;

[0011] The input end of the load and switching power supply output voltage feedback circuit is connected to the second output end of the switching power supply and the second end of the load, and the output end of the load and switching power supply output voltage feedback circuit is connected to the second input end of the controller;

[0012] The first output end of the controller is connected to the input end of the pre-charge control circuit, and the second output end of the controller is connected to the input end of the load output control switch circuit;

[0013] The output end of the pre-charge control circuit is connected to the second input end of the power distribution board;

[0014] The output end of the load output control switch circuit is connected to the input end of the load output control switch drive circuit;

[0015] The output end of the load output control switch drive circuit is connected to the second input end of the power distribution board.

[0016] Preferably, the power control board further includes: a first level conversion circuit, a second level conversion circuit, and a third level conversion circuit;

[0017] The input end of the first level conversion circuit is connected to the output end of the power-down interface circuit, and the output end of the first level conversion circuit is connected to the first input end of the controller;

[0018] The input end of the second level conversion circuit is connected to the output end of the pre-charge control circuit, and the output end of the second level conversion circuit is connected to the second input end of the power distribution board;

[0019] The input end of the third level conversion circuit is connected to the output end of the load and switching power supply output voltage feedback circuit, and the output end of the third level conversion circuit is connected to the second input end of the controller.

[0020] Preferably, the power distribution board includes: a pre-charge circuit, a load output switch circuit, a power supply input circuit, and a load output voltage feedback interface;

[0021] Among them, the first input end of the pre-charge circuit is connected to the output end of the power control board, the second output end of the pre-charge circuit is connected to the first output end of the power supply input circuit, and the output end of the pre-charge circuit is connected to the first input end of the load output switch circuit;

[0022] The second output terminal of the power supply output circuit is connected to the second input terminal of the load output switch circuit;

[0023] The third input terminal of the load output switch circuit is connected to the output terminal of the power control board, and the output terminal of the load output switch circuit is connected to the input terminal of the load output voltage feedback interface.

[0024] Preferably, the power distribution board further includes: a pre-charge signal input interface and a load output switch control signal output interface;

[0025] Among them, the input terminal of the pre-charge signal input interface is connected to the output terminal of the power control board, and the output terminal of the pre-charge signal input interface is connected to the first input terminal of the pre-charge circuit;

[0026] The input terminal of the load output switch control signal input interface is connected to the output terminal of the power control board, and the output terminal of the load output switch control signal input interface is connected to the third input terminal of the load output switch circuit.

[0027] Preferably, the pre-charge circuit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a triode, and a MOS transistor;

[0028] The first end of the first resistor is connected to the output terminal of the pre-charge signal input interface, the second end of the first resistor is connected to the first end of the second resistor and the first end of the third resistor, and the first end of the first resistor is the first input terminal of the pre-charge circuit;

[0029] The second end of the second resistor is connected to the base of the triode;

[0030] The second end of the third resistor is connected to the emitter of the triode and grounded;

[0031] The first end of the fourth resistor is connected to the first output terminal of the power supply input circuit and the source of the MOS transistor, the second end of the fourth resistor is connected to the first output terminal of the power supply input circuit, the gate of the MOS transistor, and the first end of the fifth resistor, and the first end of the fourth resistor is the second input terminal of the pre-charge circuit;

[0032] The second end of the fifth resistor is connected to the collector of the triode;

[0033] The drain of the MOS transistor is connected to the second input terminal of the load output switch circuit, and the drain of the MOS transistor is the output terminal of the pre-charge circuit.

[0034] Preferably, the pre-charge circuit further includes: a first capacitor, a second capacitor, a sixth resistor, a seventh resistor, and a rheostat;

[0035] Among them, the first end of the first capacitor is connected to the first end of the second resistor, the first end of the sixth resistor, and the base of the triode. The second end of the first capacitor is connected to the second end of the sixth resistor, the second end of the third resistor, and the emitter of the triode, and is grounded.

[0036] The first end of the rheostat is connected to the first end of the second capacitor, the first end of the fourth resistor, and the source of the MOS transistor. The second end of the rheostat is connected to the second end of the second capacitor, the second end of the fourth resistor, the first end of the fifth resistor, and the gate of the MOS transistor.

[0037] The first end of the seventh resistor is connected to the drain of the MOS transistor. The second end of the seventh resistor is connected to the second input terminal of the load output switch circuit, and the second end of the seventh resistor is connected to the output terminal of the precharge circuit.

[0038] Preferably, the load output switch circuit includes: a power supply switch controller, a first rectifier diode, a second rectifier diode, an eighth resistor, a first light-emitting diode, a ninth resistor, and a second light-emitting diode.

[0039] Among them, the first end of the power supply switch controller is connected to the output terminal of the load output switch control signal input interface and the first end of the first rectifier diode. The second end of the power supply switch controller is connected to the second end of the first rectifier diode and the second output terminal of the power supply input circuit. The third end of the power supply switch controller is connected to the second output terminal of the power supply input circuit and the first end of the second rectifier diode. The fourth end of the power supply switch controller is connected to the second end of the second rectifier diode, the first end of the eighth resistor, and the output terminal of the precharge circuit.

[0040] The second end of the eighth resistor is connected to the first end of the first light-emitting diode.

[0041] The second end of the first light-emitting diode is connected to the first end of the ninth resistor.

[0042] The second end of the ninth resistor is connected to the first end of the second light-emitting diode.

[0043] The second end of the second light-emitting diode is grounded.

[0044] Preferably, the load output switch circuit further includes: a fuse, a tenth resistor, and an eleventh resistor.

[0045] Among them, the first end of the fuse is connected to the first end of the eighth resistor, the second end of the second rectifier diode, and the fourth end of the power supply switch controller. The second end of the fuse is connected to the second end of the first light-emitting diode, the first end of the ninth resistor, and the first end of the tenth resistor.

[0046] The second end of the tenth resistor is connected to the first end of the eleventh resistor.

[0047] The second terminal of the eleventh resistor is connected to the second terminal of the second light-emitting diode and grounded.

[0048] To solve the above technical problems, the present application also provides an electronic device, including the above power control and distribution circuit.

[0049] A power control and distribution circuit provided by the present utility model includes: a power control board and at least one power distribution board; wherein, the first input terminal of the power distribution board is connected to the first output terminal of the corresponding switching power supply, the second input terminal of the power distribution board is connected to the output terminal of the power control board, and the first output terminal of the power distribution board is connected to the first terminal of the corresponding load; the first input terminal of the power control board is connected to the second output terminal of any one of the power distribution boards, the second input terminal of the power control board is connected to the second output terminal of the switching power supply and the second terminal of the load; the input terminal of the switching power supply is connected to the mains port. It can be seen that the present application realizes the sequential power-on of each load through the power control board and the power distribution board, so as to reduce the damage of surge to circuit components and extend the service life of the instrument; at the same time, the power control board in the present application is also connected to the switching power supply and the load, detects the voltage of the load and the switching power supply and alarms when the voltage is abnormal to protect the circuit components, and overall reduces the failure rate of the system and improves the reliability of the system. Description of the Drawings

[0050] In order to more clearly illustrate the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0051] Figure 1 It is a schematic diagram of a power control and distribution circuit provided by an embodiment of the present application;

[0052] Figure 2 It is a schematic diagram of a specific first power control and distribution circuit provided by an embodiment of the present application;

[0053] Figure 3 It is a schematic diagram of a specific second power control and distribution circuit provided by an embodiment of the present application;

[0054] Figure 4 It is a schematic diagram of a power control board provided by an embodiment of the present application;

[0055] Figure 5 It is a circuit diagram of the first part of the power control board provided by an embodiment of the present application;

[0056] Figure 6 It is a circuit diagram of the second part of the power control board provided by an embodiment of the present application;

[0057] Figure 7 The circuit diagram of the third part of the power control board provided by the embodiment of the present application;

[0058] Figure 8 The circuit diagram of the fourth part of the power control board provided by the embodiment of the present application;

[0059] Figure 9 The schematic diagram of the power distribution board provided by the embodiment of the present application;

[0060] Figure 10 The circuit diagram of the pre-charge circuit provided by the embodiment of the present application;

[0061] Figure 11 The circuit diagram of the load output switch circuit provided by the embodiment of the present application. Detailed implementation manners

[0062] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0063] The core of the present invention is to provide a power control and distribution circuit and an electronic device.

[0064] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0065] Figure 1 The schematic diagram of a power control and distribution circuit provided by the present application is shown in the figure and includes: a power control board and at least one power distribution board;

[0066] Among them, the first input end of the power distribution board is connected to the first output end of the corresponding switching power supply, the second input end of the power distribution board is connected to the output end of the power control board, and the first output end of the power distribution board is connected to the first end of the corresponding load;

[0067] The first input end of the power control board is connected to the second output end of any one power distribution board, and the second input end of the power control board is connected to the second output end of the switching power supply and the second end of the load;

[0068] The input end of the switching power supply is connected to the mains port.

[0069] In a specific embodiment, such as Figure 1As shown in the figure, there are a power control board 1, a power distribution board 2, a switching power supply 3, a load 4, and a mains power port 5. Among them, the first input end of the power distribution board 2 is connected to the first output end of the corresponding switching power supply 3, the second input end of the power distribution board 2 is connected to the output end of the power control board 1, and the first output end of the power distribution board 2 is connected to the first end of the corresponding load 4; the first input end of the power control board 1 is connected to the second output end of any one power distribution board 2, and the second input end of the power control board 1 is connected to the second output end of the switching power supply 3 and the second end of the load 4; the input end of the switching power supply 3 is connected to the mains power port 5. Among them, the mains power is connected to the power distribution board 2 through the switching power supply 3 via the mains power port 5, and the power distribution board 2 connects to the loads 4 of each unit of the instrument, and these units include motion control, heating, refrigeration, photometry, pump valve drive, etc. Its working principle is as follows: when the whole machine is connected to the AC mains power, the switching power supply 3 is closed. When the power control board 1 receives the port opening command sent by the upper computer, the power control board 1 controls the power distribution board 2 to power on each module load 4 of the whole machine in sequence; the output of the load 4 is detected and fed back to the power control board 1. When abnormal voltage is detected, the port power supply is turned off and relevant faults are reported to the upper computer through CAN communication.

[0070] For example, when the number of power distribution boards 2 is 3, each power distribution board 2 corresponds to 2 switching power supplies 3, and corresponds to N loads 4, the schematic diagram is as Figure 2 and Figure 3 shown. Among them, the power supply of the power control board 1 is provided by the power distribution board 2, and each power distribution board 2 connects to N paths of loads 4. Each power distribution board 2 connects to 2 switching power supplies 3 of the same model and specification. The 2 switching power supplies 3 are connected in parallel to supply power to the loads 4 connected to each power distribution board 2, and the power distribution board 2 powers on the loads 4 in sequence.

[0071] A power control and distribution circuit provided by the present utility model includes: a power control board and at least one power distribution board; among them, the first input end of the power distribution board is connected to the first output end of the corresponding switching power supply, the second input end of the power distribution board is connected to the output end of the power control board, and the first output end of the power distribution board is connected to the first end of the corresponding load; the first input end of the power control board is connected to the second output end of any one power distribution board, and the second input end of the power control board is connected to the second output end of the switching power supply and the second end of the load; the input end of the switching power supply is connected to the mains power port. It can be seen that the present application realizes powering on each load in sequence through the power control board and the power distribution board, so as to reduce the damage of inrush current to circuit components and extend the service life of the instrument; at the same time, the power control board in the present application is also connected to the switching power supply and the load, detects the voltages of the load and the switching power supply and alarms when the voltage is abnormal, thereby protecting the circuit components, and overall reducing the failure rate of the system and improving the reliability of the system.

[0072] Based on the above embodiments, as a preferred embodiment, the power control board includes: a power-off interface circuit, a controller, a pre-charge control circuit, a load output control switch circuit, a load output control switch drive circuit, a load, and a switching power supply output voltage feedback circuit;

[0073] Among them, the input end of the power-off interface circuit is connected to the power-off button, and the output end of the power-off interface circuit is connected to the first input end of the controller;

[0074] The input end of the load and switching power supply output voltage feedback circuit is connected to the second output end of the switching power supply and the second end of the load, and the output end of the load and switching power supply output voltage feedback circuit is connected to the second input end of the controller;

[0075] The first output end of the controller is connected to the input end of the pre-charge control circuit, and the second output end of the controller is connected to the input end of the load output control switch circuit;

[0076] The output end of the pre-charge control circuit is connected to the second input end of the power distribution board;

[0077] The output end of the load output control switch circuit is connected to the input end of the load output control switch drive circuit;

[0078] The output end of the load output control switch drive circuit is connected to the second input end of the power distribution board.

[0079] The power control board further includes: a first level conversion circuit, a second level conversion circuit, and a third level conversion circuit;

[0080] The input end of the first level conversion circuit is connected to the output end of the power-off interface circuit, and the output end of the first level conversion circuit is connected to the first input end of the controller;

[0081] The input end of the second level conversion circuit is connected to the output end of the pre-charge control circuit, and the output end of the second level conversion circuit is connected to the second input end of the power distribution board;

[0082] The input end of the third level conversion circuit is connected to the output end of the load and switching power supply output voltage feedback circuit, and the output end of the third level conversion circuit is connected to the second input end of the controller.

[0083] In a specific embodiment, as Figure 4 shown, among them, the power control board 1 includes: a power-off interface circuit 6, a first level conversion circuit 7, a controller 8, a pre-charge control circuit 9, a second level conversion circuit 10, a load output control switch circuit 11, a load output control switch drive circuit 12, a load and switching power supply output voltage feedback circuit 13, and a third level conversion circuit 14; Figure 4It also includes: a host computer 15, a power-off button (stop button 16, sleep button 17). Among them, the input end of the power-off interface circuit 6 is connected to the power-off button, and the output end of the power-off interface circuit 6 is connected to the input end of the first level conversion circuit 7; the output end of the first level conversion circuit 7 is connected to the first input end of the controller 8; the input end of the load and the switching power supply output voltage feedback circuit 13 is connected to the second output end of the switching power supply 3 and the second end of the load 4, and the output end of the load and the switching power supply output voltage feedback circuit 13 is connected to the input end of the third level conversion circuit 14; among them, the input end of the load and the switching power supply output voltage feedback circuit 13 is the second input end of the power control board 1; the output end of the third level conversion circuit 14 is connected to the second input end of the controller 8; the first output end of the controller 8 is connected to the input end of the pre-charge control circuit, and the second output end of the controller 8 is connected to the input end of the load output control switch circuit 11; the output end of the pre-charge control circuit 9 is connected to the input end of the second level conversion circuit 10; the output end of the second level conversion circuit 10 is connected to the second input end of the power distribution board 1; the output end of the load output control switch circuit 11 is connected to the input end of the load output control switch drive circuit 12; the output end of the load output control switch drive circuit 12 is connected to the second input end of the power distribution board 1, among which, the output end of the second level conversion circuit 10 and the output end of the load output control switch drive circuit 12 are the output ends of the power control board. The working principle of the power control board is: the controller 8 receives the power provided by the power distribution board 2. When receiving the signal from the host computer through CAN communication, the power control board 1 outputs a pre-charge control circuit signal and a load output control switch circuit signal in total. Among them, after the pre-charge circuit control signal passes through the second level conversion circuit 10, it is connected to the power distribution board 2, and the load output control switch circuit signal passes through the load output control switch drive circuit 12 and is connected to the power distribution board 2. For example, when the number of power distribution boards 2 is 3 and the number of loads is 10, the pre-charge circuit control signal passing through the second level conversion circuit 10 and the load output control switch circuit signal passing through the load transfer control switch drive circuit 12, where each 1 path is divided into 3 paths and respectively connected to the pre-charge circuits and the load power supply switch control circuits of the 3 power distribution boards 2. That is, the 10 paths of the power control board correspond to 3 power distribution boards. The control circuits of the 3 power distribution boards power on the loads in sequence from the first path to the tenth path.

[0084] Among them, the circuit diagrams of the pre-charge control circuit 9 and the second level conversion circuit 10 are as Figure 5As shown in the figure, it includes: a first buffer chip circuit (chip U5, resistor R11, resistor R12, capacitor C24), a first optocoupler chip circuit (chip U4, resistor R13, resistor R14, resistor R15, resistor R16), and a second optocoupler chip circuit (chip U6, resistor R17, resistor R18, resistor R19, resistor R20). Among them, pins 2 - 9 and 19 of chip U5 are connected to the first output terminal of the controller, pins 15 - 18 of chip U5 are connected to pins 2, 4, 6, 8 of chip U4, and pins 11 - 14 of chip U5 are connected to pins 2, 4, 6, 8 of chip U6. Resistor R11, resistor R12, and capacitor C24 are also connected to the pins of chip U5; resistor R13, resistor R14, resistor R15, and resistor R16 are also connected to the pins of chip U4; resistor R17, resistor R18, resistor R19, and resistor R20 are also connected to the pins of chip U6. The load output control switch circuit 11 is as Figure 6 shown, and includes: a second buffer chip circuit (chip U16, resistor R51, resistor R52, capacitor C28) and a driver chip circuit (chip U17); among them, pins 2 - 8 of chip U16 are connected to the second output terminal of the controller 8, pins 12 - 18 of chip U16 are connected to pins 1 - 7 of chip U17, and resistor R51, resistor R52, and capacitor C28 are also connected to the pins of chip U16. The power-down interface circuit 6 is as Figure 7 shown, and includes chip U36, resistor R132, resistor R133, resistor R136, resistor R138, resistor R134, resistor R137, resistor R139, and resistor R141. Among them, Figure 7 J5, J6, J7, and J8 in Figure 8 are all power-down interfaces, pins 10, 12, 14, 16 of chip U36 are connected to the controller 8, and the pins of chip U36 are also connected to resistor R132, resistor R133, resistor R136, resistor R138, resistor R134, resistor R137, resistor R139, and resistor R141. The third level conversion circuit 14 is as

[0085] shown, and includes chip U26, resistor R61, resistor R63, resistor R65, resistor R67, resistor R62, resistor R64, resistor R66, and resistor R68. Pins 10, 12, 14, 16 of chip U26 are connected to the second output terminal of the controller 8, and the pins of chip U26 are also connected to resistor R61, resistor R63, resistor R65, resistor R67, resistor R62, resistor R64, resistor R66, and resistor R68.

[0085] Among them, the controller 8 can be a controller device such as MCU, FPGA, DSP, ARM, etc.; the optocoupler chip device can be replaced with a level conversion chip or a MOS transistor and other devices.

[0086] It should be noted that the circuit provided in this application is only one possible implementation, but it is not limited to this implementation only. It can be set according to the needs of users.

[0087] Based on the above embodiments, as a preferred embodiment, the power distribution board includes: a pre-charge circuit, a load output switch circuit, a power supply input circuit, and a load output voltage feedback interface;

[0088] The first input end of the pre-charge circuit is connected to the output end of the power control board. The second output end of the pre-charge circuit is connected to the first output end of the power supply input circuit. The output end of the pre-charge circuit is connected to the first input end of the load output switch circuit;

[0089] The second output end of the power supply output circuit is connected to the second input end of the load output switch circuit;

[0090] The third input end of the load output switch circuit is connected to the output end of the power control board. The output end of the load output switch circuit is connected to the input end of the load output voltage feedback interface.

[0091] The power distribution board further includes: a pre-charge signal input interface and a load output switch control signal output interface;

[0092] The input end of the pre-charge signal input interface is connected to the output end of the power control board. The output end of the pre-charge signal input interface is connected to the first input end of the pre-charge circuit;

[0093] The input end of the load output switch control signal input interface is connected to the output end of the power control board. The output end of the load output switch control signal input interface is connected to the third input end of the load output switch circuit.

[0094] In a specific embodiment, such as Figure 9As shown, the power distribution board includes: a pre-charge signal input interface 18, a load output switch control signal input interface 19, a pre-charge circuit 20, a load output switch circuit 21, a power supply input circuit 22, and a load output voltage feedback interface 23; wherein, the input end of the pre-charge signal input interface 18 is connected to the output end of the power control board 1, and the output end of the pre-charge signal input interface 18 is connected to the first input end of the pre-charge circuit 20; the first output end of the power supply input circuit 22 is connected to the second input end of the pre-charge circuit 20, and the second input end of the power supply input circuit 22 is connected to the first input end of the load output switch circuit 21; the output end of the pre-charge circuit 20 is connected to the second input end of the load output switch circuit 21; the input end of the load output switch control signal input interface 19 is connected to the output end of the power control board 1, and the output end of the load output switch control signal input interface 19 is connected to the third input end of the load output switch circuit 21; wherein, the input end of the pre-charge signal input interface 18 and the input end of the load output switch control signal input interface 19 are the second input ends of the power distribution board 2; the output end of the load output switch circuit 21 is connected to the input end of the load output voltage feedback interface 23; the output end of the load output voltage feedback interface 23 is connected to the second input end of the power control board 1.

[0095] Among them, the pre-charge circuit 20 is as Figure 10The components shown include: a first resistor R18, a second resistor R21, a third resistor R23, a fourth resistor R13, a fifth resistor R15, a triode Q3, a MOS transistor Q1, a first capacitor C3, a second capacitor C1, a sixth resistor R24, a seventh resistor R19, and a varistor D2. The first end of the first resistor R18 is connected to the output end of the pre-charge signal input interface. The second end of the first resistor R18 is connected to the first end of the second resistor R21 and the first end of the third resistor R23. The first end of the first resistor R18 is the first input end of the pre-charge circuit. The second end of the second resistor R21 is connected to the base of the triode Q3. The second end of the third resistor R23 is connected to the emitter of the triode Q3 and is grounded. The first end of the fourth resistor R13 is connected to the first output end (+24V) of the power supply input circuit and the source of the MOS transistor Q1. The second end of the fourth resistor R13 is connected to the first output end (+24V) of the power supply input circuit, the gate of the MOS transistor Q1, and the first end of the fifth resistor R15. The first end of the fourth resistor R13 is the second input end of the pre-charge circuit. The second end of the fifth resistor R15 is connected to the collector of the triode Q3. The drain of the MOS transistor Q1 is connected to the second input end of the load output switch circuit. The drain of the MOS transistor Q1 is the output end of the pre-charge circuit. The first end of the first capacitor C3 is connected to the first end of the second resistor R21, the first end of the sixth resistor R247, and the base of the triode Q3. The second end of the first capacitor C3 is connected to the second end of the sixth resistor R24, the second end of the third resistor R23, and the emitter of the triode Q3 and is grounded. The first end of the varistor D2 is connected to the first end of the second capacitor C1, the first end of the fourth resistor R13, and the source of the MOS transistor Q1. The second end of the varistor D2 is connected to the second end of the second capacitor C1, the second end of the fourth resistor R13, the first end of the fifth resistor R15, and the gate of the MOS transistor Q1. The first end of the seventh resistor R19 is connected to the drain of the MOS transistor Q1. The second end of the seventh resistor R19 is connected to the second input end of the load output switch circuit. The second end of the seventh resistor R19 is connected to the output end of the pre-charge circuit.

[0096] The load output switch circuit 21 is as Figure 11As shown in the figure, it includes: a power supply switch controller K1, a first rectifier diode D12, a second rectifier diode D14, an eighth resistor R84, a first light-emitting diode R18, a ninth resistor R83, a second light-emitting diode R15, fuses F3 and F4, a tenth resistor R86, and an eleventh resistor R87. Among them, the first end of the power supply switch controller K1 is connected to the output end of the load output switch control signal input interface and the first end of the first rectifier diode D12. The second end of the power supply switch controller K1 is connected to the second end of the first rectifier diode D12 and the second output end (+24V) of the power supply input circuit. The third end of the power supply switch controller K1 is connected to the second output end (+24V) of the power supply input circuit and the first end of the second rectifier diode D14. The fourth end of the power supply switch controller K1 is connected to the second end of the second rectifier diode D14, the first end of the eighth resistor R84, and the output end (V1) of the pre-charge circuit. The second end of the eighth resistor R84 is connected to the first end of the first light-emitting diode D18. The second end of the first light-emitting diode D18 is connected to the first end of the ninth resistor R83. The second end of the ninth resistor R83 is connected to the first end of the second light-emitting diode D15. The second end of the second light-emitting diode D15 is grounded. The first end of the fuse F3 is connected to the first end of the eighth resistor R84, the second end of the second rectifier diode D14, and the fourth end of the power supply switch control K1. The second end of the fuse F4 is connected to the second end of the first light-emitting diode D18, the first end of the ninth resistor R83, and the first end of the tenth resistor R86. The second end of the tenth resistor R86 is connected to the first end of the eleventh resistor R87. The second end of the eleventh resistor R87 is connected to the second end of the second light-emitting diode D15 and is grounded.

[0097] It should be noted that the circuit provided in the embodiment of the present application is only one implementable way, but it is not limited to only this implementable way, and can be set by oneself according to the needs of users.

[0098] From the circuit described in the above embodiments, for example, the logic of powering on the first-way load power supply is as follows: after the input switch between the commercial power and the switching power supply is closed, the commercial power is connected to the switching power supply. After the power control board receives the port opening command from the upper computer through CAN communication, the controller 8 outputs a low level to pin 2 of the chip U5. After buffering, pin 18 outputs a low level, and then it is connected to pin 2 of the chip U4. The secondary pin 15 of the chip U4 outputs a high level to the pre-charge circuit to turn on the pre-charge function. At this time Figure 10When Q3 and Q1 in it are turned on, the voltage at V1 quickly charges from 0 to the power supply voltage of 24V. After the pre-charging is completed, after a delay in the internal program of the controller, the high level output by the controller 8 reaches pin 2 of chip U16. After buffering, the high level is output from pin 18 to pin 1 of chip U17. After current amplification and inversion, the low level is output from pin 16, and then the coil of the load power supply switch control device K1 is energized, causing the contacts of K1 to close and powering on VOUT1. Among them, J1 is externally connected to the load, and D15 lights up to indicate that the first load port is powered on. When the upper port of the load is powered on, the controller 8 closes the pre-charging function after a delay, and the voltage at point V1 drops from 24V to 0V. When there is a short circuit or overcurrent in this path, fuses F3 and F4 blow, and D18 lights up to indicate a fault in this path. Then, the power supplies for the 2nd, 3rd, and up to the 10th loads are powered on in sequence. When the port closing command from the upper computer is received, the controller 8 controls to turn on the pre-charging function, closes the load power supply control switch after a delay, and closes the pre-charging function after a delay. Then, the power supplies for the 2nd, 2nd, and up to the 10th loads are powered off in sequence. Among them, as Figure 7 shown, the power-off button is connected to the power supply control board through the power-off interface (J8, J7, J6, J5). When the stop button is pressed, the signal enters pin 1 of chip U36 after being limited in current by resistor R132 and is at a high level. The secondary pin 16 of chip U36 outputs a low level and enters the controller 8, and then controls the load power supply switches of all ports to disconnect, and all load power supplies are powered off. Among them, different power-off buttons have certain differences. When the power-off button is the stop button, then control the load power supply switches of all ports to disconnect, and all load power supplies are powered off; when the power-off button is the sleep button, the power supply for the refrigeration load is retained, and the power supplies for all other loads are powered off. The power supply voltage of the load is divided by resistor R86 and resistor R87 and enters pin 1 of chip U26, and then after level conversion, it is output from pin 16 of chip U26 to the controller 8 for voltage sampling. When the load power supply voltage is abnormal, the load power supply is powered off and the control machine is reported an error. The principle of switching power supply voltage sampling is the same. Among them, as Figure 2 、 3 shown, when the instrument is working properly, switching power supply 1 and switching power supply 2 supply power to the 10 loads connected to power distribution board 1 at the same time, and each power supply supplies 50% of the load. When one of the power supplies fails, the other power supply supplies 100% of the load, and at the same time reports the switching power supply failure to the upper computer and waits to replace the faulty power supply when the instrument is idle. The working principles of power distribution boards 2 and 3 and switching power supplies 3, 4, 5, and 6 are the same.

[0099] A power control and distribution circuit provided by the present utility model includes: a power control board and at least one power distribution board; wherein, the first input end of the power distribution board is connected to the first output end of the corresponding switching power supply, the second input end of the power distribution board is connected to the output end of the power control board, and the first output end of the power distribution board is connected to the first end of the corresponding load; the first input end of the power control board is connected to the second output end of any one power distribution board, the second input end of the power control board is connected to the second output end of the switching power supply and the second end of the load; the input end of the switching power supply is connected to the mains port. It can be seen that the present application realizes the sequential power-on of each load through the power control board and the power distribution board, so as to reduce the damage of surge to circuit devices and extend the service life of the instrument; at the same time, the power control board in the present application is also connected to the switching power supply and the load, detects the voltage of the load and the switching power supply and alarms when the voltage is abnormal, thereby protecting the circuit devices, and overall reducing the failure rate of the system and improving the reliability of the system.

[0100] To solve the above technical problems, the present application also provides an electronic device, which includes the above power control and distribution circuit and has the same beneficial effects. Since the embodiments of the electronic device part correspond to the embodiments of the above power control and distribution circuit, please refer to the description of the embodiments of the above power control and distribution circuit part for the embodiments of the electronic device part, and will not be elaborated here for the time being.

[0101] The above has introduced in detail a power control and distribution circuit and an electronic device provided by the present utility model. The various embodiments in the specification are described in a progressive manner, and the key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

[0102] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A power control distribution circuit, characterized in that: include: a power control board, at least one power distribution board; Wherein, the first input end of the power distribution board is connected to the first output end of the corresponding switching power supply, the second input end of the power distribution board is connected to the output end of the power control board, and the first output end of the power distribution board is connected to the first end of the corresponding load; The first input end of the power control board is connected to the second output end of any one of the power distribution boards, and the second input end of the power control board is connected to the second output end of the switching power supply and the second end of the load; The input end of the switching power supply is connected to the mains power port.

2. The power control distribution circuit according to claim 1, characterized in that: The power control board includes: a power-off interface circuit, a controller, a pre-charge control circuit, a load output control switch circuit, a load output control switch drive circuit, and a load and switch power supply output voltage feedback circuit; Wherein, the input end of the power-off interface circuit is connected to the power-off button, and the output end of the power-off interface circuit is connected to the first input end of the controller; The input end of the load and switching power supply output voltage feedback circuit is connected to the second output end of the switching power supply and the second end of the load, and the output end of the load and switching power supply output voltage feedback circuit is connected to the second input end of the controller; The first output terminal of the controller is connected to the input terminal of the pre-charge control circuit, and the second output terminal of the controller is connected to the input terminal of the load output control switch circuit; The output end of the pre-charge control circuit is connected to the second input end of the power distribution board; The output end of the load output control switch circuit is connected to the input end of the load output control switch driving circuit; The output end of the load output control switch driving circuit is connected to the second input end of the power distribution board.

3. The power control distribution circuit according to claim 2, characterized in that: The power control board further includes: a first level conversion circuit, a second level conversion circuit and a third level conversion circuit; The input end of the first level conversion circuit is connected to the output end of the power-off interface circuit, and the output end of the first level conversion circuit is connected to the first input end of the controller; The input end of the second level conversion circuit is connected to the output end of the pre-charge control circuit, and the output end of the second level conversion circuit is connected to the second input end of the power distribution board; The input end of the third level conversion circuit is connected to the load and the output end of the switching power supply output voltage feedback circuit, and the output end of the third level conversion circuit is connected to the second input end of the controller.

4. The power control distribution circuit according to any one of claims 1 to 3, characterized in that: The power distribution board includes: a pre-charging circuit, a load output switch circuit, a power supply input circuit and a load output voltage feedback interface; Wherein, the first input end of the pre-charging circuit is connected to the output end of the power control board, the second output end of the pre-charging circuit is connected to the first output end of the power supply input circuit, and the output end of the pre-charging circuit is connected to the first input end of the load output switch circuit; The second output end of the power supply input circuit is connected to the second input end of the load output switch circuit; The third input terminal of the load output switch circuit is connected to the output terminal of the power control board, and the output terminal of the load output switch circuit is connected to the input terminal of the load output voltage feedback interface.

5. The power control distribution circuit according to claim 4, characterized in that: The power distribution board also includes: a pre-charge signal input interface and a load output switch control signal output interface; Wherein, the input end of the pre-charge signal input interface is connected to the output end of the power control board, and the output end of the pre-charge signal input interface is connected to the first input end of the pre-charge circuit; The input end of the load output switch control signal input interface is connected to the output end of the power control board, and the output end of the load output switch control signal input interface is connected to the third input end of the load output switch circuit.

6. The power control distribution circuit according to claim 5, characterized in that: The pre-charging circuit comprises: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a triode and a MOS tube; The first end of the first resistor is connected to the output end of the pre-charging signal input interface, the second end of the first resistor is connected to the first end of the second resistor and the first end of the third resistor, and the first end of the first resistor is the first input end of the pre-charging circuit; The second end of the second resistor is connected to the base of the transistor; The second end of the third resistor is connected to the emitter of the transistor and is grounded; The first end of the fourth resistor is connected to the first output end of the power supply input circuit and the source of the MOS tube, the second end of the fourth resistor is connected to the first output end of the power supply input circuit, the gate of the MOS tube and the first end of the fifth resistor, and the first end of the fourth resistor is the second input end of the pre-charging circuit; The second end of the fifth resistor is connected to the collector of the transistor; The drain of the MOS tube is connected to the second input end of the load output switch circuit, and the drain of the MOS tube is the output end of the pre-charging circuit.

7. The power control distribution circuit according to claim 6, characterized in that: The pre-charging circuit further includes: a first capacitor, a second capacitor, a sixth resistor, a seventh resistor and a variable resistor; Wherein, the first end of the first capacitor is connected to the first end of the second resistor, the first end of the sixth resistor and the base of the transistor, and the second end of the first capacitor is connected to the second end of the sixth resistor, the second end of the third resistor and the emitter of the transistor, and is grounded; The first end of the variable resistor is connected to the first end of the second capacitor, the first end of the fourth resistor and the source of the MOS tube, and the second end of the variable resistor is connected to the second end of the second capacitor, the second end of the fourth resistor, the first end of the fifth resistor and the gate of the MOS tube; The first end of the seventh resistor is connected to the drain of the MOS tube, the second end of the seventh resistor is connected to the second input end of the load output switch circuit, and the second end of the seventh resistor is connected to the output end of the pre-charging circuit.

8. The power control distribution circuit according to claim 4, characterized in that: The load output switch circuit comprises: a power supply switch controller, a first rectifier diode, a second rectifier diode, an eighth resistor, a first light emitting diode, a ninth resistor and a second light emitting diode; Wherein, a first end of the power switch controller is connected to an output end of the load output switch control signal input interface and a first end of the first rectifier diode, a second end of the power switch controller is connected to a second end of the first rectifier diode and a second output end of the power input circuit, a third end of the power switch controller is connected to a second output end of the power input circuit and a first end of the second rectifier diode, and a fourth end of the power switch controller is connected to a second end of the second rectifier diode, a first end of the eighth resistor, and an output end of the pre-charging circuit; The second end of the eighth resistor is connected to the first end of the first light emitting diode; The second end of the first light emitting diode is connected to the first end of the ninth resistor; The second end of the ninth resistor is connected to the first end of the second light emitting diode; The second terminal of the second light emitting diode is grounded.

9. The power control distribution circuit according to claim 8, characterized in that: The load output switch circuit further includes: a fuse, a tenth resistor and an eleventh resistor; Wherein, the first end of the fuse is connected to the first end of the eighth resistor, the second end of the second rectifier diode and the fourth end of the power switch controller, and the second end of the fuse is connected to the second end of the first light-emitting diode, the first end of the ninth resistor and the first end of the tenth resistor; The second end of the tenth resistor is connected to the first end of the eleventh resistor; The second end of the eleventh resistor is connected to the second end of the second light emitting diode and is grounded.

10. An electronic device, characterized in that: The invention comprises the power control distribution circuit as described in any one of claims 1 to 9.

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