Power connection device and electronic node

Abstract

The invention relates to the technical field of computers, and discloses a power supply connecting device and an electronic node, the power supply connecting device comprises a power supply connector and a power supply module; the power supply module comprises a first control circuit and a protection circuit; the power supply connector comprises a power supply pin and a signal pin; the power supply pin is located outside the signal pin; the first control circuit is configured to output a first control signal under the condition that the signal pin is not electrified; under the condition that the signal pin is electrified, a second control signal is output; the protection circuit is configured to stop working under the condition that a first control signal is accessed to the control end; and under the condition that the second control signal is accessed to the control end, the control output end supplies power to the electronic node. According to the invention, corresponding signals can be successively provided for the power supply module at the rear end based on successively contacting the two pins of the power supply busbar, safe hot plugging is realized in cooperation with the power supply module at the rear end, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to a power connection device and an electronic node. Background Art

[0002] The whole cabinet has the characteristics of high-density deployment and can integrate multiple electronic nodes, which is conducive to improving computing power density. In order to be able to add or remove some internal electronic nodes without shutting down the whole cabinet system, the electronic nodes must be hot-swappable. Summary of the invention

[0003] In view of this, the present invention provides a power connection device and an electronic node to enable hot plugging of the electronic node.

[0004] In a first aspect, the present invention provides a power connection device, comprising a power connector and a power supply module; the power supply module comprises a first control circuit and a protection circuit; The power connector includes a power pin and a signal pin; the power pin is located outside the signal pin; The input end of the first control circuit is connected to the signal pin, and the output end is connected to the control end of the protection circuit; The first control circuit is configured to: output a first control signal when the signal pin is not powered; and output a second control signal when the signal pin is powered; The input end of the protection circuit is connected to the power pin; the protection circuit is configured to: stop working when the control end is connected to the first control signal; and control the output end to power the electronic node when the control end is connected to the second control signal.

[0005] In a second aspect, the present invention provides an electronic node, comprising: a power connection device according to the first aspect or any corresponding embodiment thereof.

[0006] The power connection device provided by the embodiment of the present invention includes a power connector and a power supply module, and the power connector is provided with power pins and signal pins in sequence from the outside to the inside, so that during hot plugging, the power pins are closer to the power supply busbar, the power pins are powered first when the power connector is plugged in, and the signal pins are detached first when the power connector is unplugged. There is a transition period in which the power pins contact the power supply busbar but the signal pins do not contact the power supply busbar. During the transition period, the electronic nodes are not powered, so that the power pins and the power supply busbar will not affect the rear-end electronic nodes when they are connected or disconnected, and there is no large current, so that safe hot plugging of electronic nodes can be achieved. In addition, the power connector has a simple structure, and the power supply module can be implemented based on a simple circuit without the need for complex control logic. The implementation method is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0008] Figure 1 is a schematic diagram of an electronic node taking power from a power supply busbar according to an embodiment of the present invention; Figure 2 is a structural schematic diagram of a power connection device according to an embodiment of the present invention; Figure 3 is a structural schematic diagram of a power connector according to an embodiment of the present invention; Figure 4 is another structural schematic diagram of a power connection device according to an embodiment of the present invention; Figure 5 is another structural schematic diagram of a power connection device according to an embodiment of the present invention; Figure 6 is a schematic diagram of a first structure of a power supply module according to an embodiment of the present invention; Figure 7 is a second structural schematic diagram of a power supply module according to an embodiment of the present invention; Figure 8 is a third structural schematic diagram of a power supply module according to an embodiment of the present invention; Fig. 9 is a fourth structural schematic diagram of a power supply module according to an embodiment of the present invention; Fig.10 is a fifth structural schematic diagram of a power supply module according to an embodiment of the present invention; Fig.11 is a sixth structural schematic diagram of a power supply module according to an embodiment of the present invention; Fig.12 is a seventh structural schematic diagram of a power supply module according to an embodiment of the present invention; Fig.13 is an eighth structural schematic diagram of a power supply module according to an embodiment of the present invention; Fig.14 is a ninth structural schematic diagram of a power supply module according to an embodiment of the present invention; Fig.15 is a tenth structural schematic diagram of a power supply module according to an embodiment of the present invention; Fig.16 is an eleventh structural schematic diagram of a power supply module according to an embodiment of the present invention; Fig.17 is a twelfth structural schematic diagram of a power supply module according to an embodiment of the present invention.

[0009] Description of reference numerals: 10, power connector; 20, first control circuit; 30, protection circuit; 40, second control circuit; 50, power supply board; 100, power supply busbar; J1, power wiring assembly; J2, signal wiring assembly; a1, first power supply terminal; b1, first grounding terminal; a2, second power supply terminal; b2, second grounding terminal; 11, power pin; 12, signal pin; 111, first power supply contact; 112, first grounding contact; 121, second power supply contact; 122, second grounding contact; 201, detection circuit; 2 02, first switch circuit; 401, second switch circuit; Q1, first switch tube; Q2, second switch tube; Q3, third switch tube; Q4, fourth switch tube; Q5, fifth switch tube; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; R8, eighth resistor; R9, ninth resistor; R10, tenth resistor; R11, eleventh resistor; R12, twelfth resistor; R13, thirteenth resistor; R0, discharge resistor. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0011] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0012] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0013] In addition, in order to better illustrate the present invention, numerous specific details are provided in the following specific embodiments. It should be understood by those skilled in the art that the present invention can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present invention.

[0014] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0015] As a key device for achieving high computing density, high interconnection bandwidth, high power density and high energy efficiency, the hot-swap technology of the electronic nodes inside the whole cabinet becomes particularly important. Hot-swap technology allows electronic nodes to be added or removed without shutting down the entire system, thereby improving the availability and flexibility of the system.

[0016] Figure 1 The figure shows a schematic diagram of a power supply architecture of a cabinet server, in which one or more independently operable electronic nodes such as server nodes and switch nodes are installed in the cabinet. Figure 1 As shown, the server cabinet is provided with a power supply busbar, and each electronic node is connected to the power supply busbar through a power connector to obtain power.

[0017] The power connector of the electronic node is connected to the power supply busbar in a plug-in manner, which is convenient for adding electronic nodes. The power connector is, for example, a power clip. When the electronic node is hot-swapped to power on and off the electronic node, a large surge current is easily generated at the moment when the power connector is connected or disconnected from the DC busbar, which can easily impact the motherboard, hard disk, heat sink and other components inside the electronic node.

[0018] In order to realize hot plugging of electronic nodes, in the related art, a complex mechanical structure is designed between the electronic node and the power supply busbar so that the electronic node can be safely plugged in or unplugged in a live state.

[0019] Some solutions use the BMC (Baseboard Management Controller) or CPLD (Complex Programmable Logic Device) inside the electronic node to control the on and off status of the power connector. Power management is relatively complex and requires precise control of power outage and restoration to avoid impact on the system. In addition, devices from different manufacturers have differences in hot-swap interfaces and protocols, which leads to compatibility issues and affects the scalability and interoperability of the system.

[0020] An embodiment of the present invention provides a power connection device, which is provided with a signal pin for a power connector and is located at the rear end of the power pin; and a power supply module is used to detect the power supply status of the power pin and the power supply pin, so that a transition can be performed when the power pin contacts the power supply busbar but the signal pin does not contact the power supply busbar, so that no large current is generated when the power pin and the power supply busbar are connected or disconnected, and the electronic nodes at the rear end are not affected, so that safe hot plugging can be achieved.

[0021] The embodiment of the present invention provides a power connection device for connecting an electronic node to a power supply busbar of a cabinet, thereby providing power to the electronic node. Figure 2 As shown, the power connection device includes: a power connector 10 and a power supply module; the power supply module includes a first control circuit 20 and a protection circuit 30.

[0022] The power connector 10 includes a power pin 11 and a signal pin 12 ; the power pin 11 is located outside the signal pin 12 .

[0023] The input end of the first control circuit 20 is connected to the signal pin 12, and the output end is connected to the control end of the protection circuit 30. The first control circuit 20 is configured to output a first control signal when the signal pin 12 is not powered, and output a second control signal when the signal pin 12 is powered.

[0024] The input end of the protection circuit 30 is connected to the power pin 11; the protection circuit 30 is configured to: stop working when the control end is connected to the first control signal; and control the output end to power the electronic node when the control end is connected to the second control signal.

[0025] In this embodiment, the power connection device is used to draw power from the power supply busbar 100, and at least includes a power connector 10 for connecting to the power supply busbar 100. The power connector 10 mainly includes an insulating body and a pin for conducting electricity, namely a power pin 11. The power pin 11 is used to draw power from the power supply busbar 100, thereby being able to supply power to the electronic node. The power connector 10 can adopt a variety of structural forms, such as a gold finger power connector, a power clip, etc.

[0026] Figure 2 In the figure, a power connector 10 with a power clip structure is taken as an example; Figure 2 As shown, the power connector 10 includes a U-shaped insulating body, which forms a slot, and the power pin 11 is arranged in the slot; by plugging the power connector 10 into the power busbar 100, the power pin 11 can be electrically connected to the power busbar 100, thereby realizing power supply.

[0027] And, if Figure 2 As shown, the power connector 10 also includes a signal pin 12; wherein the power pin 11 and the signal pin 12 are arranged side by side, and the power pin 11 is located outside the signal pin 12, that is, the power pin 11 is closer to the outside, so that when the power connector 10 is plugged into the power supply busbar 100, the power pin 11 contacts the power supply busbar 100 first, and the signal pin 12 contacts the power supply busbar 100 later.

[0028] The power supply busbar 100 is generally fixed in position. When power needs to be supplied to the electronic node, for example, when the electronic node is assembled into a cabinet, the power connector 10 can be plugged into the power supply busbar 100. Figure 2 As shown, the plugging direction of the power connector 10 is from right to left, so as to plug the power connector 10 into the power supply busbar 100. In the plugging direction of the power connector 10, the signal pin 12 and the power pin 11 are arranged in sequence, or in other words, the power pin 11 is located at a more outer position of the power connector 10 relative to the signal pin 12.

[0029] like Figure 2 As shown, for the power connector 10 with a power clip structure, the power pin 11 and the signal pin 12 are both arranged in the slot of the power connector 10, and from the inside to the outside they are the signal pin 12 and the power pin 11, or in other words, the signal pin 12 is arranged on the side of the power pin 11 close to the bottom of the slot.

[0030] In the power connector 10 provided in this embodiment, since the power pin 11 is located outside the signal pin 12, when the power connector 10 is plugged into the power busbar 100, the power pin 11 first contacts the power busbar 100, and the signal pin 12 contacts the power busbar 100 later. Based on the two pins that contact the power busbar 100 in sequence, corresponding signals can be provided to the power supply module at the rear end in sequence, and safe hot swapping can be achieved in coordination with the power supply module at the rear end.

[0031] Specifically, the power supply module includes a first control circuit 20 and a protection circuit 30. Figure 2 As shown, the input terminal of the first control circuit 20 ( Figure 2 The upper end of the first control circuit 20) is connected to the signal pin 12, and the output end of the first control circuit 20 ( Figure 2 The right end of the first control circuit 20) and the control end of the protection circuit 30 ( Figure 2 The left end of the protection circuit 30 is connected.

[0032] When the signal pin 12 is not powered, that is, when the signal pin 12 is not connected to the power supply bus 100, the input end of the first control circuit 20 will not collect the corresponding electrical signal, for example, the input end of the first control circuit 20 is at a low level or is suspended, and at this time, the output end of the first control circuit 20 outputs a control signal, that is, a first control signal, which can be sent to the control end of the protection circuit 30. When the signal pin 12 is powered, that is, when the signal pin 12 is connected to the power supply bus 100, the input end of the first control circuit 20 will collect the corresponding electrical signal, such as a high-level signal provided by the power supply bus 100, and at this time, the output end of the first control circuit 20 outputs another control signal different from the first control signal, that is, a second control signal, which can also be sent to the control end of the protection circuit 30, so that the protection circuit 30 can perform different processing based on different control signals.

[0033] For the protection circuit 30, if Figure 2 As shown, the input terminal of the protection circuit 30 ( Figure 2 The upper end of the protection circuit 30 is connected to the power pin 11, and the output end of the protection circuit 30 is used to power the electronic node, for example, to power the node loads such as the processor and the heat sink in the electronic node. Figure 2 If the control signal connected to the control end of the protection circuit 30 is the first control signal, that is, the signal pin 12 is not powered at this time, the protection circuit 30 stops working, that is, the protection circuit 30 does not work, and the electronic node will not be powered at this time; if the control signal connected to the control end of the protection circuit 30 is the second control signal, the protection circuit 30 starts working at this time, and controls its output end to power the electronic node at the back end according to the power provided by the power pin 11 connected to the input end.

[0034] Among them, the protection circuit 30 can specifically be a level conversion circuit with a protection function. When the protection circuit 30 is working, the level connected to the input end (that is, the level introduced by the power supply pin 11 from the power supply bus 100) can be converted to the level required by the rear-end electronic node. Alternatively, the protection circuit 30 can also be a switch circuit with a protection function. For example, the protection circuit 30 is an electronic fuse (electronic fuse, eFuse), and the electronic fuse is controlled by a control signal to control whether it works. When the electronic fuse works, its input end and output end are turned on, so that the power taken from the power supply pin 11 from the power supply bus 100 can be transmitted to the rear-end electronic node. At this time, a level conversion circuit is set at the output end of the electronic fuse to provide the electronic node with the required level for work. Generally, the power supply bus 100 provides 54V DC power. If the working voltage of the electronic node is 12V, it is necessary to use a level conversion circuit to convert 54V to 12V.

[0035] For traditional power connectors, during the hot-plugging process, since the voltage provided by the power bus is relatively high, currently generally 54V, a large surge current will be generated at the moment of connection or disconnection between the power connector and the DC bus, which may not only impact the internal devices of the electronic node, but may also cause arcing and heating due to ionization, thus posing a safety hazard.

[0036] The power connection device provided in this embodiment can effectively solve the above problems. Specifically, the working principle of the power connection device is as follows: When the power connector 10 is inserted into the power supply busbar 100 of the cabinet, since the power pin 11 is located outside the signal pin 12, the power pin 11 is powered first (contacts the power supply busbar 100 first), and the signal pin 12 is not powered at this time, so the first control circuit 20 outputs the first control signal; although the input end of the protection circuit 30 is connected to the power provided by the power supply busbar 100, under the action of the first control signal, the protection circuit 30 does not work, and the input and output ends of the protection circuit 30 are disconnected, that is, the power pin 11 is not connected to the electronic node at the rear end. At the moment when the power pin 11 contacts the power supply busbar 100, since the protection circuit 30 is not working at this time, it is in a disconnected state, so no large current will be generated between the power pin 11 and the power supply busbar 100.

[0037] When the power connector 10 is further inserted, the signal pin 12 is energized, that is, the signal pin 12 contacts the power supply busbar 100, and the first control circuit 20 outputs the second control signal; for the protection circuit 30, its input end is first connected to the power provided by the power pin 11, and then the control end of the protection circuit 30 receives the second control circuit, and then the protection circuit 30 starts to work. That is, after the protection circuit 30 is connected to the power provided by the power pin 11 (or connected to the power supply busbar 100), it will start to work after a short period of time. When the protection circuit 30 starts to work, since there is no moment of contact with the power supply busbar 100, there will be no large current at this time, so that the back-end electronic nodes can be safely powered on.

[0038] When the power connector 10 is unplugged, the process is the opposite of plugging in. Specifically, when the power connector 10 is unplugged, the signal pin 12 loses power first, that is, the signal pin 12 is first disconnected from the power supply busbar 100, and at this time, the first control circuit 20 outputs the first control signal again, so that the protection circuit 30 is converted from the working state to the non-working state, that is, the protection circuit 30 stops working, and the power supply busbar 100 no longer supplies power to the electronic node.

[0039] Continue to unplug the power connector 10, and the power pin 11 will lose power, that is, the power pin 11 will be separated from the power supply busbar 100; similar to the above-mentioned plug-in process, since the protection circuit 30 is not working at this time, the input and output ends of the protection circuit 30 are disconnected, that is, the power pin 11 is not connected to the rear-end electronic node, so at the moment when the power pin 11 contacts the power supply busbar 100, no large current will be generated between the power pin 11 and the power supply busbar 100.

[0040] In addition, at the moment when the signal pin 12 is powered on or off, that is, at the moment when the signal pin 12 is connected to or disconnected from the power supply bus 100, since the signal collected by the signal pin 12 is used to control the protection circuit 30, it will not power the rear-end electronic nodes, so there will be no large current at this time, that is, it will not affect the power supply of the rear-end electronic nodes.

[0041] The power connection device provided by the embodiment of the present invention includes a power connector 10 and a power supply module, and the power connector is provided with a power pin 11 and a signal pin 12 in sequence from the outside to the inside, so that during hot plugging, the power pin 11 is closer to the power supply bus 100, and the power pin 11 is powered first when the power connector 10 is plugged in, and the signal pin 12 is disconnected first when the power connector 10 is unplugged. There is a transition period in which the power pin 11 contacts the power supply bus 100 but the signal pin 12 does not contact the power supply bus 100. During the transition period, the electronic node is not powered, so that the power pin 11 and the power supply bus 100 are connected or disconnected without affecting the electronic nodes at the rear end, and there is no large current, so that the safe hot plugging of the electronic node can be achieved. In addition, the power connector 10 has a simple structure, and the power supply module can be implemented based on a simple circuit, does not require complex control logic, and has a simple implementation method and low cost.

[0042] In some optional embodiments, since the power supply bus 100 includes a positive pole and a negative pole, the positive pole is used to provide power, such as 54V DC, and the negative pole of the power supply bus 100 provides ground (Gnd); accordingly, the power pin 11 and the signal pin 12 also include two contacts, which are respectively used to connect the positive pole and the negative pole of the power supply bus 100.

[0043] Specifically, Figure 3 As shown, the power pin 11 includes a first power supply contact 111 and a first ground contact 112 ; the first power supply contact 111 is used to connect to the positive pole of the power supply busbar 100 , and the first ground contact 112 is used to connect to the negative pole of the power supply busbar 100 .

[0044] The signal pin 12 includes a second power supply contact 121 and a second ground contact 122 ; the second power supply contact 121 is used to be connected to the positive electrode of the power supply busbar 100 , and the second ground contact 122 is used to be connected to the negative electrode of the power supply busbar 100 . Figure 3 In the figure, components related to the power supply are represented by gray graphics, such as the positive pole of the power supply busbar 100, the first power supply contact 111, the second power supply contact 121, etc.

[0045] In which, in the plugging direction of the power connector 10, the first grounding contact 112 is further outward than the first power contact 111; and / or, in the plugging direction of the power connector 10, the second grounding contact 122 is further outward than the second power contact 121.

[0046] In this embodiment, in the plugging direction of the power connector 10, the first grounding contact 112 is located further outward than the first power contact 111, so that when the power connector 10 is plugged in, the first grounding contact 112 first contacts the negative pole of the power busbar 100, and then the first power contact 111 contacts the positive pole of the power busbar 100. Figure 3As shown, in the plugging direction of the power connector 10 , the first grounding contact 112 is outside the first power supply contact 111 , and there is a certain distance difference between the two, and the distance difference is d1 .

[0047] Similarly, for the signal pin 12, in the plugging direction of the power connector 10, the second grounding contact 122 is located further outward than the second power contact 121, so that when the power connector 10 is plugged in, the second grounding contact 122 first contacts the negative pole of the power busbar 100, and then the second power contact 121 contacts the positive pole of the power busbar 100. Figure 3 As shown, in the plugging direction of the power connector 10 , the second grounding contact 122 is outside the second power supply contact 121 , and there is a certain distance difference between the two, and the distance difference is d2 .

[0048] In this embodiment, when the power connector 10 is plugged in, since the first grounding contact 112 is further outward, the first grounding contact 112 first contacts the negative pole of the power supply busbar 100, so that the power connection device (especially the power supply module therein) can be grounded first, which can provide a grounding path for the device housing or conductive parts, release the static electricity accumulated by the human body or the device in advance, and avoid electrostatic discharge (ESD) from damaging sensitive electronic components. In addition, the power connection device is grounded and then connected to the positive pole. The contacted ground wire can balance the potential between the power connection device and the power supply busbar 100, reduce the generation of arcs, and effectively reduce the probability of generating instantaneous surge currents, so as to protect the power connection device and extend its life.

[0049] In addition, contrary to the plug-in process, when the power connector 10 is unplugged, the first power supply contact 111 is first disconnected from the power supply bus 100, and then the first grounding contact 112 is disconnected, that is, the positive pole is disconnected first and then the ground wire, which can ensure that there is always grounding protection during the power-off process, reducing the risks caused by residual charge, etc.

[0050] Similarly, the second grounding contact 122 is located further outwards than the second power supply contact 121 and has the same effect, which will not be described in detail herein.

[0051] It can be understood that since the signal pin 12 is mainly used to generate a control signal, and when it is connected to the power supply bus 100, the first grounding contact 112 has been grounded, the two contacts of the signal pin 12 can be aligned, or one in front of the other (that is, the second grounding contact 122 is further outward relative to the second power supply contact 121), and this embodiment does not limit this. However, for safety reasons, the two pins of the power pin 11 need to be one in front of the other, that is, the first grounding contact 112 is further outward relative to the first power supply contact 111.

[0052] Optionally, since the second ground contact 122 of the signal pin 12 can also be used to detect whether the signal pin 12 is energized, in order to ensure that the power supply module can accurately start working after the power pin 11 is connected to the power supply bus 100, in this embodiment, in the plugging direction of the power connector 10, the first power supply contact 111 is further outward relative to the second ground contact 122.

[0053] like Figure 3 As shown, the first power supply contact 111 and the second grounding contact 122 are also spaced a certain distance apart, so that when the power connector 10 is plugged in, the first power supply contact 111 first contacts the positive pole of the power supply busbar 100, and then the second grounding contact 122 contacts the negative pole of the power supply busbar 100, thereby ensuring that the order of contact meets the requirements.

[0054] In some alternative embodiments, see Figure 4 As shown, the power connection device also includes a power supply board 50; the power supply module is deployed on the power supply board 50; for example, the power supply board 50 can be a PCB board (printed circuit board), and a first control circuit 20 and a protection circuit 30 are arranged on the power supply board 50.

[0055] And, if Figure 4 As shown, the power supply board 50 also includes a power wiring assembly J1 and a signal wiring assembly J2; wherein the power pin 11 is connected to the power supply module through the power wiring assembly J1, and the signal pin 12 is connected to the power supply module through the signal wiring assembly J2.

[0056] Specifically, the power pin 11 can be connected to the input end of the protection circuit 30 through the power wiring assembly J1. The signal pin 12 can be connected to the input end of the first control circuit 20 through the signal wiring assembly J2. The power wiring assembly J1 and the signal wiring assembly J2 are components that facilitate electrical connection between the circuit board and other pins, such as terminal blocks.

[0057] In this embodiment, the power supply module is deployed on the power supply board 50, and the power connection component J1 and the signal connection component J2 of the power supply board 50 can be used to realize the electrical connection between each pin in the power connector 10 and the corresponding circuit of the power supply module. The implementation method is simple and makes the connection method between the power connector 10 and the power supply module more flexible and convenient for disassembly.

[0058] Alternatively, if Figure 5As shown, the power pin 11 includes a first power supply contact 111 and a first ground contact 112, and the signal pin 12 includes a second power supply contact 121 and a second ground contact 122. Accordingly, the power wiring assembly J1 includes a first power supply terminal a1 and a first ground terminal b1, and the signal wiring assembly J2 includes a second power supply terminal a2 and a second ground terminal b2.

[0059] The first power supply contact 111 is connected to the first power supply terminal a1, and the first ground contact 112 is connected to the first ground terminal b1; the second power supply contact 121 is connected to the second power supply terminal a2, and the second ground contact 122 is connected to the second ground terminal b2. Figure 5 In the figure, components related to the power supply are represented by gray graphics, such as the first power supply contact 111, the second power supply contact 121, the first power supply terminal a1, the second power supply terminal a2, etc.

[0060] Accordingly, each terminal in the wiring assembly is connected to the circuit of the power supply module. Since the first grounding contact 112 is further outward, it can be used as the ground of the entire power supply module. Specifically, Figure 5 As shown, the first grounding contact 112 is connected to the protection circuit 30 through the first grounding terminal b1 and serves as the ground (Gnd) of the protection circuit 30; and the first power supply contact 111 is connected to the first end of the protection circuit 30 through the first power supply terminal a1 to provide the power supply Vin for the protection circuit 30. The subsequent protection circuit 30 supplies power to the node load at the rear end based on the power supply Vin.

[0061] Similarly, the second power supply contact 121 and / or the second grounding contact 122 may also be connected to the first control circuit 20 via the second power supply terminal a2 and / or the second grounding terminal b2. Figure 5 For example, the second power supply contact 121 is connected to the first control circuit 20 through the second power supply terminal a2, so that the first control circuit 20 can detect whether the second power supply contact 121 is powered.

[0062] In some optional embodiments, another input terminal of the first control circuit 20 is connected to the power pin 11; the first control circuit 20 is configured to output a second control signal when the signal pin 12 and the power pin 11 are powered.

[0063] In this embodiment, see Figure 6 As shown, in addition to being connected to the signal pin 12, the first control circuit 20 can also be connected to the power pin 11, so as to comprehensively determine the power status of the power pin 11 and the signal pin 12, so as to accurately detect whether the power connector 10 is plugged into the DC bus 100. Figure 6In the subsequent related drawings, IN represents the input terminal of the protection circuit 30 , EN represents the control terminal of the protection circuit 30 , and OUT represents the output terminal of the protection circuit 30 .

[0064] For example, the first control circuit 20 may be an AND gate circuit, and the power pin 11 and the signal pin 12 are respectively connected to the two input ends of the AND gate circuit. When the signal pin 12 is powered and the power pin 11 is powered, the two input ends of the AND gate circuit will both be high level, and the AND gate circuit will output a high level at this time. When only one pin is powered (for example, only the power pin 11 is powered) or both pins are not powered, the AND gate circuit outputs a low level, so that different control signals can be distinguished, which is convenient for controlling the back-end protection circuit 30.

[0065] Optionally, since the first control circuit 20 also requires power when working, in this embodiment, the power pin 11 is connected to the power end of the first control circuit 20 to be able to power the first control circuit 20; and the first control circuit 20 mainly detects whether the signal pin 12 is powered.

[0066] Specifically, see Figure 7 As shown, the first control circuit 20 includes a detection circuit 201 and a first switch circuit 202 .

[0067] The input end of the detection circuit 201 is connected to the signal pin 12, and the output end is connected to the control end of the first switch circuit 202. The detection circuit 201 is configured to output a corresponding detection signal when it is detected that the signal pin 12 is powered.

[0068] The power supply end of the first switch circuit 202 is connected to the power supply pin 11, and the output end is connected to the control end of the protection circuit 30. The first switch circuit 202 is configured to: output a first control signal when no detection signal is received; and output a second control signal when a detection signal is received.

[0069] In this embodiment, the signal pin 12 is connected to the input end of the detection circuit 201, for example, the second power supply contact 121 of the signal pin 12 is connected to the input end of the detection circuit 201, or the second ground contact 122 of the signal pin 12 is connected to the input end of the detection circuit 201, so as to detect whether the signal pin 12 contacts the power supply bus 100.

[0070] If the detection circuit 201 detects that the signal pin 12 is energized, that is, detects that the signal pin 12 contacts the power supply busbar 100, the detection circuit 201 outputs a signal indicating that the signal pin 12 is energized, that is, a detection signal, to the first switch circuit 202. If the detection circuit 201 does not detect the signal pin 12, the detection circuit 201 may not work (or not work, which is equivalent to the absence of the detection circuit 201), or the detection circuit 201 outputs other signals different from the detection signal, that is, the first switch circuit 202 at the back end will not receive the detection signal.

[0071] For example, the second power supply contact 121 is connected to the input end of the detection circuit 201, so that the detection circuit 201 can detect whether the second power supply contact 121 is in contact with the power supply bus 100. When the second power supply contact 121 becomes a high level, it can be determined that the second power supply contact 121 is in contact with the power supply bus 100, that is, the signal pin 12 is energized. At this time, the output end of the detection circuit 201 outputs a corresponding detection signal, and the detection signal corresponds to the signal pin 12 being energized.

[0072] And, if Figure 7 As shown, in addition to being connected to the input terminal IN of the protection circuit 30, the power pin 11 is also connected to the input terminal of the first switch circuit 202, so as to provide power Vin for the protection circuit 30 and the first switch circuit 202. Specifically, the input terminal IN of the protection circuit 30 and the input terminal of the first switch circuit 202 are connected by the first power supply contact 111 of the power pin 11.

[0073] When the power connector 10 is plugged into the power busbar 100, the power pin 11 contacts the power busbar 100 first, that is, the power pin 11 is powered first, and the first power contact 111 is at a high level (e.g., 54V), so that the power Vin can be provided to the first switch circuit 202 and the protection circuit 30 at the rear end, that is, the first switch circuit 202 is connected to a working power supply. Since the signal pin 12 is not powered at this time, the detection circuit 201 will not output a detection signal, that is, the first switch circuit 202 will not receive the detection signal, and the first switch circuit 202 will output a first control signal to the control terminal EN of the protection circuit 30 at this time; as described above, the protection circuit 30 is not working at this time.

[0074] Continue to plug in the power connector 10 so that the signal pin 12 contacts the power bus 100, that is, the signal pin 12 is energized. At this time, the detection circuit 201 outputs a detection signal, and the first switch circuit 202 responds to the detection signal, and can adaptively adjust the output control signal, that is, output a second control signal. At this time, the protection circuit 30 starts to work, and according to the power Vin connected to the input terminal IN, the output terminal OUT of the protection circuit 30 is controlled to output a corresponding voltage to be able to power the node load.

[0075] In this embodiment, a detection circuit 201 and a first switch circuit 202 are provided in the first control circuit 20, and the detection circuit 201 and the first switch circuit 202 are respectively connected to the signal pin 12 and the power pin 11, so as to be able to isolate the two pins while detecting the power supply status of each pin; the detection circuit 201 and the first switch circuit 202 have clear division of labor to ensure stable operation of the circuit.

[0076] Optionally, the detection signal is a low level signal, the first control signal is a low level signal, and the second control signal is a high level signal. In addition, the first switch circuit 202 includes a first switch tube Q1.

[0077] The control end of the first switch tube Q1 is connected to the output end of the detection circuit 201, and the output loop of the first switch tube Q1 is connected to the control end of the protection circuit 30. The first switch tube Q1 is configured to control the on-off of the output loop according to the detection signal to change the level state of the output end of the first switch circuit 202.

[0078] In this embodiment, the control signal output by the first switch circuit 202 is a level signal, and the first control signal or the second control signal can be output by outputting level signals of different magnitudes. Among them, the control terminal EN of the protection circuit 30 is also the enable terminal of the protection circuit 30, that is, the control signal output by the first control circuit 20 is an enable signal; generally, when the enable signal is at a high level, the protection circuit 30 starts to work, so the first control signal is set to a low level signal, and the second control signal is set to a high level signal.

[0079] Moreover, after the power pin 11 contacts the power supply bus 100, the input end of the first switch circuit 202 is connected to the power supply Vin. If the detection signal is designed to be a high level, the detection signal is likely to affect the power supply Vin. Therefore, in this embodiment, the detection signal is set to a low level to ensure that the detection signal only plays a control role.

[0080] In order to simply implement the first switch circuit 202, a switch tube, i.e., a first switch tube Q1, is provided for the first switch circuit 202. By controlling the conduction state of the first switch tube Q1, the first switch circuit 202 can adaptively output the first control signal or the second control signal. Specifically, the control end of the first switch tube Q1 is connected to the output end of the detection circuit 201, i.e., the control end of the first switch tube Q1 can receive the detection signal, and then can control the on and off of the output circuit according to the detection signal.

[0081] The output loop refers to a loop in which the switch tube can control the on / off state of the back end under the action of the input control signal. After the switch tube is turned on, the current can flow into one end of the switch tube and flow out from the other end of the switch tube, that is, the output loop is turned on; the two ends corresponding to the output loop of the switch tube are subsequently referred to as the current input end and the current output end, respectively. By controlling whether the output loop is turned on, the signal output by the output end of the first switch circuit 202 can be adjusted, so that the corresponding first control signal or the second control signal can be output.

[0082] In this embodiment, the switch tube can be a triode or a field effect tube (MOS). For example, if the switch tube is a triode, the base of the triode is the control terminal, and its collector and emitter are the current input terminal and the current output terminal; if the switch tube is a field effect tube, the gate of the field effect tube is the control terminal, and its source and drain are the current input terminal and the current output terminal.

[0083] Alternatively, see Figure 8 As shown, the first switch circuit 202 includes, in addition to the first switch tube Q1, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4.

[0084] like Figure 8 As shown, one end of the first resistor R1 is connected to the power pin 11, and the other end of the first resistor R1 is connected to the control end of the first switch tube Q1. One end of the second resistor R2 is connected to the control end of the first switch tube Q1, and the other end of the second resistor R2 is grounded. The ground of the first switch circuit 202 can be provided by the first grounding contact 112 of the power pin 11 to ensure that the first switch circuit 202 can work normally after connecting to the power supply Vin.

[0085] One end of the first resistor R1 is specifically connected to the first power supply contact 111. For example, one end of the first resistor R1 can be connected to the first power supply terminal a1 of the power connection assembly J1. It can be understood that other ends connected to the power pin 11 can also be connected in a similar manner, which will not be described in detail later.

[0086] One end of the third resistor R3 is connected to the power pin 11, and the other end of the third resistor R3 is connected to the current input end of the first switch tube Q1. One end of the fourth resistor R4 is connected to the current input end of the first switch tube Q1, and the other end of the fourth resistor R4 is grounded.

[0087] The current output terminal of the first switch tube Q1 is grounded; the current input terminal of the first switch tube Q1 is the output terminal of the first switch circuit 202, that is, the current input terminal of the first switch tube Q1 is connected to the control terminal EN of the protection circuit 30. The first switch tube Q1 is configured to: control the first switch tube Q1 to be turned on when no detection signal is received; and control the first switch tube Q1 to be turned off when a detection signal is received.

[0088] In this embodiment, the power supply Vin connected to the first switch circuit 202 is provided by the power supply bus 100, and its voltage is generally 54V, which is a high voltage level. In order to prevent the voltage at the control end of the first switch tube Q1 from being too high, a voltage divider resistor is formed based on the first resistor R1 and the second resistor R2, thereby reducing the access voltage of the control end of the first switch tube Q1. Similarly, the level signal required by the control end EN of the protection circuit 30 is generally a signal with a lower voltage level, such as 12V, 3V, etc., so this embodiment also forms a voltage divider resistor through the third resistor R3 and the fourth resistor R4, so as to provide a control signal of appropriate size for the control end EN of the protection circuit.

[0089] Moreover, when the control end of the first switch tube Q1 does not receive the detection signal, under the voltage division effect of the first resistor R1 and the second resistor R2, the control end of the first switch tube Q1 is at a high level, and the first switch tube Q1 is turned on, that is, the output circuit of the first switch tube Q1 is turned on; if the control end of the first switch tube Q1 receives the detection signal, that is, the control end is at a low level, then the first switch tube Q1 is turned off, that is, the output circuit of the first switch tube Q1 is turned off.

[0090] Specifically, the first switch tube Q1 may be an NMOS or NPN transistor, which can meet the above configuration requirements. Figure 8 As shown in the example, the first switch tube Q1 is an NMOS, whose gate is a control terminal, the drain is a current input terminal (connected to the connection node between the third resistor R3 and the fourth resistor R4), the source is a current output terminal, and is grounded.

[0091] for Figure 8 The working principle of the first control circuit 20 shown is as follows: When the power connector 10 is plugged into the power busbar 100, the power pin 11 is powered first, so the input end of the first switch circuit 202 is connected to the power supply Vin, and the first switch circuit 202 starts to work; at this time, since the signal pin 12 is not powered, the detection circuit 201 will not output a detection signal, and the detection circuit 201 does not work (or outputs a high-level signal, which is not described in detail in this embodiment); through the voltage division effect of the first resistor R1 and the second resistor R2, the gate of the first switch tube Q1 is at a high level, which meets the conduction condition, that is, the first switch tube Q1 is turned on, and the turned-on first switch tube Q1 pulls the connection node between the third resistor R3 and the fourth resistor R4 to the ground, that is, the control end EN of the protection circuit 30 is grounded, that is, the first switch circuit 202 outputs a low-level first control signal.

[0092] Continue to insert the power connector 10, then the signal pin 12 is energized, and the detection circuit 201 outputs a low-level detection signal, so that the gate of the first switch tube Q1 is at a low level, and the first switch tube Q1 is turned off; at this time, under the voltage division effect of the third resistor R3 and the fourth resistor R4, a high level after voltage division can be provided to the control terminal EN of the protection circuit 30, that is, the first switch circuit 202 outputs a high-level second control signal, and then the protection circuit 30 starts to work.

[0093] When the power connector 10 is unplugged, the working principle is similar to that described above and will not be described in detail herein.

[0094] In this embodiment, a plurality of resistors are provided in the first switch circuit 202, which cooperate with the first switch tube Q1. The circuit structure is simple, which can reduce the influence of the higher power supply Vin and ensure the output of the corresponding control signal as required. Moreover, using NMOS and other devices as the first switch tube Q1 also has a low cost.

[0095] Optionally, the first switch tube Q1 may also be a PMOS device, and, as Fig. 9 As shown, the first switch circuit 202 may include a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7 in addition to the first switch tube Q1.

[0096] like Fig. 9 As shown, one end of the fifth resistor R5 is connected to the power pin 11, and the other end of the fifth resistor R5 is connected to the control end of the first switch tube Q1.

[0097] The current input end of the first switch tube Q1 is connected to the power pin 11, and the current output end of the first switch tube Q1 is grounded through the sixth resistor R6 and the seventh resistor R7 in sequence. Specifically, one end of the sixth resistor R6 is connected to the current output end of the first switch tube Q1, the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7, and the other end of the seventh resistor R7 is grounded.

[0098] The connection node between the sixth resistor R6 and the seventh resistor R7 is the output terminal of the first switch circuit 202, which is connected to the control terminal EN of the protection circuit 30 and is used to output a corresponding control signal. The first switch tube Q1 is configured to: control the first switch tube Q1 to be turned off when no detection signal is received; and control the first switch tube Q1 to be turned on when a detection signal is received.

[0099] In this embodiment, the sixth resistor R6 and the seventh resistor R7 have similar functions to the third resistor R3 and the fourth resistor R4 , and can provide a suitable control signal (enable signal) to the control terminal EN of the protection circuit 30 through voltage division.

[0100] In addition, for Fig. 9 For the first switch tube Q1 shown, when the control end does not receive the detection signal, the control end of the first switch tube Q1 is at a high level, and the first switch tube Q1 is turned off, that is, the output circuit of the first switch tube Q1 is turned off; if the control end of the first switch tube Q1 receives the detection signal, that is, the control end is at a low level, then the first switch tube Q1 is turned on, that is, the output circuit of the first switch tube Q1 is turned on.

[0101] Specifically, the first switch tube Q1 may be a PMOS or PNP transistor, which can meet the above configuration requirements. Fig. 9 As shown in the example, the first switch tube Q1 is a PMOS, whose gate is a control terminal, the source is a current input terminal (connected to the power pin 11), and the drain is a current output terminal to connect to one end of the sixth resistor R6.

[0102] for Fig. 9 The working principle of the first control circuit 20 shown is as follows: When the power connector 10 is plugged into the power busbar 100, the power pin 11 is powered first, so the input end of the first switch circuit 202 is connected to the power supply Vin, and the first switch circuit 202 starts to work; at this time, since the signal pin 12 is not powered, that is, the detection circuit 201 will not output a detection signal, and the detection circuit 201 does not work at this time; since there is no current passing through the fifth resistor R5, the potentials of the two ends of the fifth resistor R5 are the same, that is, the gate voltage of the first switch tube Q1 is also Vin, which does not meet the turn-on condition of the first switch tube Q1, that is, the first switch tube Q1 is turned off, and at this time, there is no current in the sixth resistor R6 and the seventh resistor R7, and the control end EN of the protection circuit 30 is grounded through the seventh resistor R7, which is low level, that is, the first switch circuit 202 outputs a low-level first control signal.

[0103] Continue to insert the power connector 10, then the signal pin 12 is energized, and the detection circuit 201 outputs a low-level detection signal, so that the gate of the first switch tube Q1 is at a low level, and the first switch tube Q1 is turned on; at this time, the upper end of the sixth resistor R6 is connected to the power supply Vin, and under the voltage division effect of the sixth resistor R6 and the seventh resistor R7, a high level after voltage division can be provided to the control end EN of the protection circuit 30, that is, the first switch circuit 202 outputs a high-level second control signal, and then the protection circuit 30 starts to work.

[0104] To prevent a large gate-source voltage when the first switch tube Q1 is turned on, the detection circuit 201 may also be provided with a pull-down resistor. When the detection circuit 201 outputs a detection signal, the pull-down resistor and the fifth resistor R5 form a voltage divider resistor to protect the first switch tube Q1.

[0105] In this embodiment, the first switch circuit 202 can also be implemented based on PMOS and other devices. However, since the cost of NMOS is relatively low, it is preferred to use NMOS as the first switch tube Q1. Figure 8 The first switch circuit 202 is shown for explanation.

[0106] Optionally, the detection circuit 201 includes: a second switch tube Q2 ; wherein the control end of the second switch tube Q2 is used to be connected to the signal pin 12 , and the output loop of the second switch tube Q2 is connected to the control end of the first switch circuit 202 .

[0107] The second switch tube Q2 is configured to: control the on-off of the output circuit according to whether the signal pin 12 is powered, so as to control whether the output end of the detection circuit 201 outputs a low-level detection signal. Specifically, when the signal pin 12 is not detected to be powered, the second switch tube Q2 is turned off, and the detection circuit 201 does not work; when the signal pin 12 is detected to be powered, the second switch tube Q2 is turned on, and the detection circuit 201 outputs a low-level detection signal.

[0108] See also Fig.10 As shown, the detection circuit 201 specifically includes: a second switch tube Q2, an eighth resistor R8 and a ninth resistor R9.

[0109] Among them, one end of the eighth resistor R8 is connected to the signal pin 12, and the other end of the eighth resistor R8 is connected to the control end of the second switch tube Q2; one end of the ninth resistor R9 is connected to the control end of the second switch tube Q2, and the other end of the ninth resistor R9 is grounded.

[0110] The current input end of the second switch tube Q2 is connected to the control end of the first switch circuit 202 (for example, connected to the control end of the first switch tube Q1), and the current output end of the second switch tube Q2 is grounded. The second switch tube Q2 is configured to: when the signal pin 12 is not powered, control the second switch tube Q2 to be turned off; when the signal pin 12 is powered, control the second switch tube Q2 to be turned on.

[0111] In this embodiment, the eighth resistor R8 and the ninth resistor R9 can also form a voltage-dividing resistor, and their working principles are similar to those of the first resistor R1 and the second resistor R2 mentioned above, both of which are to ensure that the switch tube can work safely when connected to a 54V high-level voltage.

[0112] The second switch tube Q2 can be an NMOS or NPN transistor, which can meet the above configuration requirements. Fig.10 As shown in the example, the second switch tube Q2 is an NMOS, whose gate is the control terminal, the drain is the current input terminal (used to be connected to the control terminal of the first switch tube Q1), the source is the current output terminal, and is grounded.

[0113] And, if Fig.10 As shown, one end of the eighth resistor R8 is connected to the second power supply terminal a2 of the signal wiring assembly J2, thereby connecting to the signal pin 12. In addition, the ground of the detection circuit 201 is slightly different from the ground of the first switch circuit 202, as shown in FIG. Fig.10 As shown, the second grounding terminal b2 of the signal wiring assembly J2 is used as the ground of the detection circuit 201. It can be understood that since the grounds of the signal pin 12 and the power pin 11 are both the ground of the power supply busbar 100, after the power connector 10 is fully plugged in, the ground of the detection circuit 201 and the ground of the first switch circuit 202 are the same ground, which will not affect the stable operation of the power supply module.

[0114] for Fig.10 The working principle of the detection circuit 201 shown is as follows: Since the second power supply contact 121 is connected to the input end of the detection circuit 201 through the second power supply terminal a2, the detection circuit 201 can detect whether the second power supply contact 121 contacts the power supply busbar 100. When the signal pin 12 is not powered, the signal wiring assembly J2 is not connected to any level. At this time, the control end of the second switch tube Q2 is at a low level (or suspended), and the second switch tube Q2 remains turned off. At this time, the detection circuit 201 does not work and will not affect the working state of the first switch circuit 202 at the back end.

[0115] When the second power supply contact 121 becomes a high level, it can be determined that the second power supply contact 121 is in contact with the power supply bus 100, that is, the signal pin 12 is energized, and the second power supply terminal a2 becomes a high level, for example, 54V; under the voltage dividing action of the eighth resistor R8 and the ninth resistor R9, the gate of the second switch tube Q2 is a high level, which meets the conduction condition, that is, the second switch tube Q2 is turned on, and the turned-on second switch tube Q2 pulls down the control end of the first switch circuit 202 (that is, the control end of the first switch tube Q1), thereby being able to output a low-level detection signal.

[0116] In addition, if Fig.11 As shown, if the first switch tube Q1 is a PMOS, the detection circuit 201 can also adaptively output a corresponding detection signal. In order to avoid a large gate-source voltage when the first switch tube Q1 is turned on, the detection circuit 201 can also be provided with a pull-down resistor, which can be specifically provided between the current output terminal of the second switch tube Q2 and the ground ( Fig.11 ), so as to achieve a voltage division effect.

[0117] Alternatively, see Fig.12 As shown, the signal pin 12 includes a second grounding contact 122 for connecting to the negative pole of the power supply busbar 100; the second grounding contact 122 is connected to the second grounding terminal b2 of the signal wiring assembly J2. The detection circuit 201 is used to connect the second grounding contact 122 and the control end of the first switch circuit 202 (for example, the control end of the first switch tube Q1).

[0118] In this embodiment, the detection circuit 201 is a wire, which connects the second grounding contact 122 (corresponding to the second grounding terminal b2) and the control end of the second switch tube Q2. In this case, when the second grounding contact 122 of the signal pin 12 does not contact the power supply bus 100, it is equivalent to that the signal pin 12 is not powered. At this time, the detection circuit 201 is a suspended wire and does not work; when the second grounding contact 122 of the signal pin 12 contacts the power supply bus 100, the signal pin 12 is powered, and the control end of the first switch tube Q1 is pulled to the ground of the signal pin 12 (which is also the ground of the power pin 11, both of which are the ground of the power supply bus 100), thereby outputting a low-level detection signal to the first switch circuit 202. Among them, since there may be suspended wires, in order to ensure reliability, it is preferably used Fig.10 The detection circuit 201 is shown.

[0119] Understandably, to ensure Fig.12 The detection circuit 201 shown can work as required, requiring that after the power pin 11 provides power Vin, the signal pin 12 is grounded, that is, in the plugging direction of the power connector 10, the first power contact 111 is further outward than the second ground contact 122.

[0120] In this embodiment, the detection circuit 201 utilizes the second switch tube Q2 to conveniently convert the signal collected by the detected signal pin 12 into a low-level detection signal, and the circuit structure is simple; and the second switch tube Q2 can isolate the power supply contacts of the power pin 11 and the signal pin 12, thereby preventing the 54V DC power connected to the signal pin 12 from affecting the power supply status of other circuits at the back end.

[0121] In some optional implementations, when the electronic node is hot-swapped in the cabinet, surge current may also be generated when power is off due to the presence of equivalent capacitance in components such as the motherboard and hard disk in the electronic node, and the presence of filter capacitance in the protection circuit 30. To protect the node load in the electronic node, the power supply module may also have a discharge function.

[0122] See also Fig.13 As shown, the power supply module includes not only the first control circuit 20 and the protection circuit 30 , but also a second control circuit 40 .

[0123] The second control circuit 40 is connected to the first control circuit 20, and the input end of the second control circuit 40 is connected to the output end of the protection circuit 30. The second control circuit 40 is configured to discharge the output end of the protection circuit 30 when the signal pin 12 is not powered, and stop working when the signal pin 12 is powered. For example, when the first control circuit 20 outputs the first control signal, the output end of the protection circuit 30 is discharged; when the first control circuit 20 outputs the second control signal, the protection circuit 30 stops working.

[0124] In this embodiment, the second control circuit 40 mainly functions when the power connector 10 is unplugged from the power supply busbar 100 .

[0125] Specifically, when the power connector 10 is plugged into the power supply busbar 100, the power pin 11 is powered first. As described above, at this time, the first control circuit 20 outputs the first control circuit to the control terminal EN of the protection circuit 30. At this time, the protection circuit 30 does not work, that is, the output terminal OUT of the protection circuit 30 does not output voltage, and even if the second control circuit 40 is discharged, it will not affect the operation of the protection circuit 30. After the signal pin 12 is powered, the first control circuit 20 outputs the second control circuit to the control terminal EN of the protection circuit 30. At this time, the protection circuit 30 starts to work, but the second control circuit 40 stops working, that is, the second control circuit 40 still does not work. Therefore, when the power connector 10 is plugged in, it can be considered that the second control circuit 40 clock does not work. The following of this embodiment mainly explains the working principle of the second control circuit 40 when the power connector 10 is unplugged.

[0126] After the power connector 10 is fully plugged into the power bus 100, the protection circuit 30 starts working, and its output terminal OUT supplies power to the rear end load node; at this time, the second control circuit 40 does not work, that is, the second control circuit 40 will not discharge the output terminal OUT of the protection circuit 30.

[0127] When the power connector 10 is unplugged, the signal pin 11 loses power first. At this time, the control signal output by the first control circuit 20 changes from the second control signal to the first control signal, and the protection circuit 30 stops working; and the second control circuit 40 starts to work, that is, the output terminal OUT of the second control circuit 40 protection circuit 30 is discharged to discharge the charge in the node load or the capacitor of the protection circuit 30, so as to avoid surge current caused by the cessation of the protection circuit 30 and impact on the node load at the rear end.

[0128] Continue to unplug the power connector 10. After the power pin 11 loses power, the entire power supply module (including the first control circuit 20, the protection circuit 30, and the second control circuit 40) has no working power supply. As mentioned above, the protection circuit 30 that is no longer working can ensure that the rear-end node load is not affected by the disconnection of the power pin 11.

[0129] In addition, the output terminal OUT of the protection circuit 30 can be specifically connected to the power supply terminal of the second control circuit 40 to provide working power to the second control circuit 40. In other words, when the output terminal OUT of the protection circuit 30 does not output voltage, even if the first control circuit 20 outputs the first control signal, the protection circuit 30 will not function; that is, the second control circuit 40 will discharge the output terminal of the protection circuit 30 only when the first control circuit 20 outputs the first control signal and there is an output voltage at the output terminal of the protection circuit 30.

[0130] In this embodiment, a second control circuit 40 is provided at the output end of the protection circuit 30, and the second control circuit 40 can collect relevant signals of the first control circuit 20, so that when the first control circuit 20 outputs the first control signal, the second control circuit 40 can discharge the output end of the protection circuit 30, thereby avoiding surge current caused by the protection circuit 30 stopping working, and protecting the node load.

[0131] Optionally, the second control circuit 40 is provided with a discharge resistor, and a discharge function is realized based on the discharge resistor. Fig.14 As shown, the second control circuit 40 includes a second switch circuit 401 and a discharge resistor R0.

[0132] The discharge resistor R0 is connected in series to a discharge loop between the output terminal of the protection circuit 30 and the ground.

[0133] The second switch circuit 401 is configured to: when the signal pin 12 is not powered, control the discharge circuit to be turned on; when the signal pin 12 is powered, control the discharge circuit to be turned off.

[0134] In this embodiment, after the power connector 10 is fully plugged into the power supply busbar, the signal pin 12 is powered, and at this time, the second switch circuit 401 controls the discharge circuit between the output terminal OUT of the protection circuit 30 and the ground to be turned off, that is, the discharge resistor R0 does not work. When the power connector 10 is unplugged and the signal pin 12 loses power, the second switch circuit 401 controls the discharge circuit between the output terminal OUT of the protection circuit 30 and the ground to be turned on, so that the discharge resistor R0 connected in series to the discharge circuit can discharge the output terminal OUT of the protection circuit 30, thereby playing a protective role.

[0135] Optionally, based on whether the signal pin 12 is powered, the output end of the first control circuit 20 can output a corresponding control signal. Fig.14 As shown, the control end of the second switch circuit 401 is connected to the output end of the first control circuit 20 ; for example, the control end of the second switch circuit 401 is connected to the output end of the first switch circuit 202 .

[0136] The second switch circuit 401 is configured to: control the discharge circuit to be turned on when the first control circuit 20 outputs the first control signal; and control the discharge circuit to be turned off when the first control circuit 20 outputs the second control signal.

[0137] In this embodiment, the control signal (first control signal, second control signal) output by the first control circuit 20 not only enables the protection circuit 30, but also synchronously controls the on-off state of the second switch circuit 401. Specifically, if the first control circuit 20 outputs the first control signal, it means that the signal pin 12 is not powered at this time, so the second switch circuit 401 can control the discharge circuit to be turned on for discharge. On the contrary, if the first control circuit 20 outputs the second control signal, it means that the signal pin 12 is powered at this time, so the second switch circuit 401 can control the discharge circuit to be turned off, that is, the second control circuit 40 does not work.

[0138] Specifically, as described above, the first control signal is a low level signal, and the second control signal is a high level signal. In addition, the second switch circuit 401 includes a third switch tube Q3 and a fourth switch tube Q4.

[0139] The control end of the third switch tube Q3 is connected to the output end of the first control circuit 20, and the output loop of the third switch tube Q3 is connected to the control end of the fourth switch tube Q4; the discharge resistor R0 is connected in series to the output loop of the fourth switch tube Q4. That is, the output loop of the fourth switch tube Q4 can be used as the above-mentioned discharge loop.

[0140] The third switch tube Q3 is configured to: when the first control circuit 20 outputs the first control signal, control the control terminal of the fourth switch tube Q4 to a high level; when the first control circuit 20 outputs the second control signal, control the control terminal of the fourth switch tube Q4 to a low level.

[0141] The fourth switch tube Q4 is configured to: when the control terminal is at a high level, control the fourth switch tube Q4 to be turned on; when the control terminal is at a low level, control the fourth switch tube Q4 to be turned off.

[0142] In this embodiment, the second switch circuit 401 is still implemented by a switch tube; wherein, it is relatively complicated to implement the discharge loop by using a PMOS or other device, so an NMOS or other type of device is used for discharge, that is, the fourth switch tube Q4 can be specifically an NMOS or NPN type transistor, etc. And since NMOS or the like can be turned on only when the control terminal is at a high level, and the first control signal for turning on the discharge loop is at a low level, another switch tube, namely the third switch tube Q3, is further provided for the second switch circuit 401, and the third switch tube Q3 is used to provide a suitable control level for the fourth switch tube Q4.

[0143] Specifically, the control end of the third switch tube Q3 is connected to the output end of the first control circuit 20. When the first control circuit 20 outputs the first control signal, the third switch tube Q3 can control whether the control output circuit is turned on by controlling its own conduction state (for example, off), and then control the control end of the fourth switch tube Q4 to a high level, so that the fourth switch tube Q4 can be turned on, and the discharge resistor R0 realizes the discharge function through the output circuit of the fourth switch tube Q4.

[0144] When the first control circuit 20 outputs the second control signal, the third switch tube Q3 can control whether the output circuit of the controller is turned on by controlling its own conduction state (for example, being turned on), and further controls the control end of the fourth switch tube Q4 to be at a low level, so that the fourth switch tube Q4 is turned off, and the circuit where the discharge resistor R0 is located is cut off, and no discharge occurs at this time, that is, the second control circuit 40 does not work.

[0145] Optionally, the third switch tube Q3 is preferably an NMOS or NPN transistor, which has low cost and simple circuit structure. Fig.15 As shown, the second switch circuit 401 includes, in addition to the third switch tube Q3 and the fourth switch tube Q4, a tenth resistor R10 and an eleventh resistor R11. The tenth resistor R10 and the eleventh resistor R11 also form a voltage dividing resistor.

[0146] One end of the tenth resistor R10 is connected to the output terminal OUT of the protection circuit 30, and the other end of the tenth resistor R10 is connected to the control terminal of the fourth switch tube Q4. One end of the eleventh resistor R11 is connected to the control terminal of the fourth switch tube Q4, and the other end of the eleventh resistor R11 is grounded.

[0147] The current input end of the third switch tube Q3 is connected to the control end of the fourth switch tube Q4, and the current output end of the third switch tube Q3 is grounded; one end of the discharge resistor R0 is connected to the output end of the protection circuit 30, and the other end of the discharge resistor R0 is connected to the current input end of the fourth switch tube Q4; the current output end of the fourth switch tube Q4 is grounded.

[0148] At this time, the third switch tube Q3 is configured to be turned off when the control terminal is connected to the first control signal; and to be turned on when the control terminal is connected to the second control signal.

[0149] Specifically, for Fig.15 The working principle of the second control circuit 40 shown is as follows: After the power connector 10 is fully plugged into the power supply busbar, the signal pin 12 is energized, and the detection circuit 201 outputs a low-level detection signal, causing the first switch circuit 202 to output a high-level second control signal, and the protection circuit 30 is enabled to work; and the high-level second control signal turns on the third switch tube Q3, thereby pulling the control end of the fourth switch tube Q4 to a low level, and the fourth switch tube Q4 is turned off, that is, the discharge circuit where the discharge resistor R0 is located (which is also the output circuit of the fourth switch tube Q4) is not turned on, and the discharge resistor R0 is not discharged at this time.

[0150] When the power connector 10 is unplugged, the signal pin 12 loses power. At this time, the detection circuit 201 does not work, the first switch circuit 202 outputs a low-level first control signal, and the protection circuit 30 stops working; and the low-level first control signal turns off the third switch tube Q3. In addition, since the node load is powered before, after the protection circuit 30 stops working, its output terminal OUT is still maintained at a high level for a short time. At this time, under the voltage division effect of the tenth resistor R10 and the eleventh resistor R11, the control end of the fourth switch tube Q4 is at a high level, and the fourth switch tube Q4 is turned on, so that one end of the discharge resistor R0 is connected to the output terminal OUT of the protection circuit 30, and the other end is grounded, and the discharge resistor R0 is discharged.

[0151] After the discharge is completed, the output terminal OUT of the protection circuit 30 becomes a low level, and the voltage provided to the control terminal of the fourth switch tube Q4 after voltage division by the tenth resistor R10 and the eleventh resistor R11 is also a low level, which is insufficient to keep the fourth switch tube Q4 turned on, that is, the fourth switch tube Q4 is turned off, and the discharge is ended.

[0152] Among them, the tenth resistor R10 and the eleventh resistor R11 are relatively large, so that the current flowing through the tenth resistor R10 and the eleventh resistor R11 is relatively small, and the heat generated is also small, which is not used for discharge; and the resistance of the discharge resistor R0 is relatively small, so that it can be discharged quickly. That is, the resistance of the discharge resistor R0 is smaller than the resistance of the tenth resistor R10 and / or the eleventh resistor R11; in general, the discharge resistor R0 is at least one order of magnitude smaller than the resistance of the tenth resistor R10 and / or the eleventh resistor R11. For example, the sum of the resistance of the tenth resistor R10 and the eleventh resistor R11 is 110KΩ, and the resistance of the discharge resistor R0 is 5KΩ.

[0153] In this embodiment, the control signal generated by the first control circuit 20 synchronously controls the rear-end protection circuit 30 and the second control circuit 40, so that when the power connector 10 is unplugged, the second control circuit 40 can discharge the output end OUT of the protection circuit 30 in time; and, the third switch tube Q3 and the fourth switch tube Q4 can form a simple second control circuit 40 with low cost.

[0154] In addition, optionally, as described above, if the first control circuit 20 includes a detection circuit 201, the conduction status of the second switch circuit 401 can be controlled based on whether the detection circuit 201 outputs a detection signal. Fig.16 As shown, the input end of the detection circuit 201 is connected to the signal pin 12, and the detection circuit 201 is configured to: output a corresponding detection signal when it is detected that the signal pin 12 is powered; wherein, when there is no detection signal, the first control circuit 20 outputs a first control signal, and when there is a detection signal, the first control circuit 20 outputs a second control signal.

[0155] And, if Fig.16 As shown, the control end of the second switch circuit 401 is connected to the output end of the detection circuit 201 to obtain the detection signal. The second switch circuit 401 is configured to: control the discharge circuit to be turned on when no detection signal is received; and control the discharge circuit to be turned off when a detection signal is received.

[0156] In this embodiment, the detection circuit 201 can also directly control the second control circuit 40. Specifically, when the detection circuit 201 outputs a low-level detection signal due to detecting that the signal pin 12 is powered, the second switch circuit 401 can receive the detection signal. At this time, the second switch circuit 401 controls the discharge circuit to be turned off, that is, the discharge resistor R0 will not discharge. When the power connector 10 is unplugged, the detection circuit 201 no longer outputs the detection signal. At this time, the second switch circuit 401 controls the discharge circuit to be turned on, so that the discharge resistor R0 starts to discharge.

[0157] Specifically, the detection signal is a low level signal; Fig.17 As shown, the second switch circuit 401 includes: a fifth switch tube Q5, a twelfth resistor R12 and a thirteenth resistor R13. The twelfth resistor R12 and the thirteenth resistor R13 also constitute a voltage dividing resistor, which has a similar working principle to the tenth resistor R10 and the eleventh resistor R11, and will not be described here.

[0158] like Fig.17 As shown, one end of the twelfth resistor R12 is connected to the output end of the protection circuit 30, and the other end of the twelfth resistor R12 is connected to the control end of the fifth switch tube Q5.

[0159] One end of the thirteenth resistor R13 is connected to the control end of the fifth switch tube Q5, and the other end of the thirteenth resistor R13 is grounded. One end of the discharge resistor R0 is connected to the output end of the protection circuit 30, and the other end of the discharge resistor R0 is connected to the current input end of the fifth switch tube Q5; the control end of the fifth switch tube Q5 is connected to the output end of the detection circuit 201, and the current output end of the fifth switch tube Q5 is grounded.

[0160] In this embodiment, the fifth switch tube Q5 is similar to the fourth switch tube Q4, and may also be an NMOS or NPN transistor, and the working principles of the two are similar.

[0161] Specifically, for Fig.17 The working principle of the second control circuit 40 shown is as follows: After the power connector 10 is fully plugged into the power busbar, the signal pin 12 is energized, and the detection circuit 201 outputs a low-level detection signal. The low-level detection signal pulls down the control end of the fifth switch tube Q5, and the fifth switch tube Q5 is turned off, that is, the discharge circuit where the discharge resistor R0 is located (which is also the output circuit of the fifth switch tube Q5) is not conductive, and the discharge resistor R0 is not discharged at this time.

[0162] When the power connector 10 is unplugged, the signal pin 12 loses power. At this time, the detection circuit 201 does not work, for example, the second switch tube Q2 is turned off, so the detection circuit 201 does not affect the operation of the second switch circuit 401. At this time, since the protection circuit 30 previously supplies power to the node load, after the protection circuit 30 stops working, its output terminal OUT still maintains a high level for a short time. At this time, under the voltage division effect of the twelfth resistor R12 and the thirteenth resistor R13, the control end of the fifth switch tube Q5 is at a high level, and the fifth switch tube Q5 is turned on, so that one end of the discharge resistor R0 is connected to the output terminal OUT of the protection circuit 30, and the other end is grounded, and the discharge resistor R0 is discharged.

[0163] After the discharge is completed, the output terminal OUT of the protection circuit 30 becomes a low level. At this time, the voltage provided to the control terminal of the fifth switch tube Q5 is also a low level, which is insufficient to keep the fifth switch tube Q5 turned on, that is, the fifth switch tube Q5 is turned off, and the discharge is ended.

[0164] It should be noted that, since the output end of the detection circuit 201 is also connected to the first switch circuit 202, it is necessary to prevent the first switch circuit 202 from affecting the operation of the second switch circuit 401. Fig.17 As shown, the power supply Vin provided by the power pin 11 will also affect the level of the control end of the fifth switch tube Q5. In addition, at the moment when the power pin 11 is disconnected, the surge current may be transmitted to the node load through the twelfth resistor R12 in the second switch circuit 401. Therefore, it is also necessary to set an isolation circuit in the second switch circuit 401 to isolate the output end OUT of the protection circuit 30 from the power pin 11.

[0165] Therefore, the second switch circuit 401 is preferably connected to the output end of the first switch circuit 202, and the second switch circuit 401 is controlled by a control signal, which can be specifically as follows: Fig.15 As shown; due to the provision of the third switch tube Q3, the output terminal OUT of the protection circuit 30 can be isolated from the power pin 11, effectively preventing the node load from being affected by the surge current.

[0166] Based on the same inventive concept, an embodiment of the present invention also provides an electronic node, which includes any of the power connection devices described above, and the power busbar 100 is plugged into the power connection device to power the node loads such as the processor and hard disk in the electronic node, and will not be affected by surge current during hot plugging, and can achieve safe hot plugging, making it convenient to replace the electronic node. The electronic node can be a node device in the cabinet that can draw power through a power connector. For example, the electronic node can be a server node, a switching node, a storage node, etc., which is not limited in this embodiment.

[0167] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations should all be included in the protection scope of the present invention.

Claims

1. A power connection device, characterized in that: include: A power connector (10) and a power supply module; the power supply module comprises a first control circuit (20) and a protection circuit (30); The power connector (10) comprises a power pin (11) and a signal pin (12); the power pin (11) is located outside the signal pin (12); The input end of the first control circuit (20) is connected to the signal pin (12), and the output end is connected to the control end of the protection circuit (30); The first control circuit (20) is configured to: output a first control signal when the signal pin (12) is not powered; and output a second control signal when the signal pin (12) is powered; The input end of the protection circuit (30) is connected to the power pin (11); the protection circuit (30) is configured to: stop working when the control end is connected to the first control signal; and control the output end to supply power to the electronic node when the control end is connected to the second control signal.

2. The power connection device according to claim 1, characterized in that: The power pin (11) comprises a first power supply contact (111) and a first grounding contact (112); the first power supply contact (111) is used to be connected to the positive electrode of the power supply busbar (100), and the first grounding contact (112) is used to be connected to the negative electrode of the power supply busbar (100); The signal pin (12) comprises a second power supply contact (121) and a second ground contact (122); the second power supply contact (121) is used to be connected to the positive electrode of the power supply busbar (100), and the second ground contact (122) is used to be connected to the negative electrode of the power supply busbar (100); Wherein, in the plugging direction of the power connector (10), the first grounding contact (112) is located further outwards than the first power supply contact (111); and / or, in the plugging direction of the power connector (10), the second grounding contact (122) is located further outwards than the second power supply contact (121).

3. The power connection device according to claim 2, characterized in that: In the plugging direction of the power connector (10), the first power supply contact (111) is located further outward than the second grounding contact (122).

4. The power connection device according to claim 1, characterized in that: The other input end of the first control circuit (20) is connected to the power pin (11); The first control circuit (20) is configured to output a second control signal when the signal pin (12) is powered and the power pin (11) is powered.

5. The power connection device according to claim 4, characterized in that: The first control circuit (20) comprises a detection circuit (201) and a first switch circuit (202); The input end of the detection circuit (201) is connected to the signal pin (12), and the output end is connected to the control end of the first switch circuit (202); The detection circuit (201) is configured to: output a corresponding detection signal when detecting that the signal pin (12) is powered; The power supply end of the first switch circuit (202) is connected to the power supply pin (11), and the output end is connected to the control end of the protection circuit (30); The first switch circuit (202) is configured to: output the first control signal when the detection signal is not received; and output the second control signal when the detection signal is received.

6. The power connection device according to claim 5, characterized in that: The detection signal is a low-level signal; the first switch circuit (202) comprises a first switch tube (Q1); The control end of the first switch tube (Q1) is connected to the output end of the detection circuit (201), and the output loop of the first switch tube (Q1) is connected to the control end of the protection circuit (30); The first switch tube (Q1) is configured to: control the on / off of the output circuit according to the detection signal, so as to change the level state of the output end of the first switch circuit (202); wherein the first control signal is a low-level signal, and the second control signal is a high-level signal.

7. The power connection device according to claim 6, characterized in that: The first switch circuit (202) further comprises a first resistor (R1), a second resistor (R2), a third resistor (R3) and a fourth resistor (R4); One end of the first resistor (R1) is connected to the power pin (11), and the other end of the first resistor (R1) is connected to the control end of the first switch tube (Q1); One end of the second resistor (R2) is connected to the control end of the first switch tube (Q1), and the other end of the second resistor (R2) is grounded; One end of the third resistor (R3) is connected to the power pin (11), and the other end of the third resistor (R3) is connected to the current input end of the first switch tube (Q1); One end of the fourth resistor (R4) is connected to the current input end of the first switch tube (Q1), and the other end of the fourth resistor (R4) is grounded; The current output end of the first switch tube (Q1) is grounded; the current input end of the first switch tube (Q1) is the output end of the first switch circuit (202); The first switch tube (Q1) is configured to: control the first switch tube (Q1) to be turned on when the detection signal is not received; and control the first switch tube (Q1) to be turned off when the detection signal is received.

8. The power connection device according to claim 6, characterized in that: The first switch circuit (202) further comprises a fifth resistor (R5), a sixth resistor (R6) and a seventh resistor (R7); One end of the fifth resistor (R5) is connected to the power pin (11), and the other end of the fifth resistor (R5) is connected to the control end of the first switch tube (Q1); The current input end of the first switch tube (Q1) is connected to the power pin (11), and the current output end of the first switch tube (Q1) is grounded through the sixth resistor (R6) and the seventh resistor (R7) in sequence; The connection node between the sixth resistor (R6) and the seventh resistor (R7) is the output end of the first switch circuit (202); The first switch tube (Q1) is configured to: control the first switch tube (Q1) to be turned off when the detection signal is not received; and control the first switch tube (Q1) to be turned on when the detection signal is received.

9. The power connection device according to claim 5, characterized in that: The detection circuit (201) comprises: a second switch tube (Q2), an eighth resistor (R8) and a ninth resistor (R9); One end of the eighth resistor (R8) is connected to the signal pin (12), and the other end of the eighth resistor (R8) is connected to the control end of the second switch tube (Q2); One end of the ninth resistor (R9) is connected to the control end of the second switch tube (Q2), and the other end of the ninth resistor (R9) is grounded; The current input end of the second switch tube (Q2) is connected to the control end of the first switch circuit (202), and the current output end of the second switch tube (Q2) is grounded; The second switch tube (Q2) is configured to: when the signal pin (12) is not powered, control the second switch tube (Q2) to be turned off; when the signal pin (12) is powered, control the second switch tube (Q2) to be turned on.

10. The power connection device according to claim 5, characterized in that: The signal pin (12) comprises a second grounding contact (122) for connecting to the negative pole of the power supply busbar (100); The detection circuit (201) is used to connect the second grounding contact (122) and the control end of the first switch circuit (202).

11. The power connection device according to claim 1, characterized in that: The power supply module also includes a second control circuit (40); The second control circuit (40) is connected to the first control circuit (20), and an input end of the second control circuit (40) is connected to an output end of the protection circuit (30); The second control circuit (40) is configured to: discharge the output end of the protection circuit (30) when the signal pin (12) is not powered; and stop working when the signal pin (12) is powered.

12. The power connection device according to claim 11, characterized in that: The second control circuit (40) comprises a second switch circuit (401) and a discharge resistor (R0); The discharge resistor (R0) is connected in series to a discharge loop between the output end of the protection circuit (30) and the ground; The second switch circuit (401) is configured to: control the discharge circuit to be turned on when the signal pin (12) is not powered; and control the discharge circuit to be turned off when the signal pin (12) is powered.

13. The power connection device according to claim 12, characterized in that: The control end of the second switch circuit (401) is connected to the output end of the first control circuit (20); The second switch circuit (401) is configured to: control the discharge circuit to be turned on when the first control circuit (20) outputs the first control signal; and control the discharge circuit to be turned off when the first control circuit (20) outputs the second control signal.

14. The power connection device according to claim 13, characterized in that: The first control signal is a low level signal, and the second control signal is a high level signal; The second switch circuit (401) comprises a third switch tube (Q3) and a fourth switch tube (Q4); The control end of the third switch tube (Q3) is connected to the output end of the first control circuit (20), and the output loop of the third switch tube (Q3) is connected to the control end of the fourth switch tube (Q4); the discharge resistor (R0) is connected in series to the output loop of the fourth switch tube (Q4); The third switch tube (Q3) is configured to: when the first control circuit (20) outputs the first control signal, control the control end of the fourth switch tube (Q4) to be at a high level; and when the first control circuit (20) outputs the second control signal, control the control end of the fourth switch tube (Q4) to be at a low level; The fourth switch tube (Q4) is configured to: when the control terminal is at a high level, control the fourth switch tube (Q4) to be turned on; when the control terminal is at a low level, control the fourth switch tube (Q4) to be turned off.

15. The power connection device according to claim 14, characterized in that: The second switch circuit (401) further comprises: a tenth resistor (R10) and an eleventh resistor (R11); One end of the tenth resistor (R10) is connected to the output end of the protection circuit (30), and the other end of the tenth resistor (R10) is connected to the control end of the fourth switch tube (Q4); One end of the eleventh resistor (R11) is connected to the control end of the fourth switch tube (Q4), and the other end of the eleventh resistor (R11) is grounded; The current input end of the third switch tube (Q3) is connected to the control end of the fourth switch tube (Q4), and the current output end of the third switch tube (Q3) is grounded; One end of the discharge resistor (R0) is connected to the output end of the protection circuit (30), and the other end of the discharge resistor (R0) is connected to the current input end of the fourth switch tube (Q4); the current output end of the fourth switch tube (Q4) is grounded.

16. The power connection device according to claim 13, characterized in that: The first control circuit (20) comprises a detection circuit (201); The input end of the detection circuit (201) is connected to the signal pin (12), and the detection circuit (201) is configured to: output a corresponding detection signal when it is detected that the signal pin (12) is powered; wherein, in the absence of the detection signal, the first control circuit (20) outputs the first control signal, and in the presence of the detection signal, the first control circuit (20) outputs the second control signal; Furthermore, the control end of the second switch circuit (401) is connected to the output end of the detection circuit (201); The second switch circuit (401) is configured to: control the discharge circuit to be turned on when the detection signal is not received; and control the discharge circuit to be turned off when the detection signal is received.

17. The power connection device according to claim 16, characterized in that: The detection signal is a low level signal; The second switch circuit (401) comprises: a fifth switch tube (Q5), a twelfth resistor (R12) and a thirteenth resistor (R13); One end of the twelfth resistor (R12) is connected to the output end of the protection circuit (30), and the other end of the twelfth resistor (R12) is connected to the control end of the fifth switch tube (Q5); One end of the thirteenth resistor (R13) is connected to the control end of the fifth switch tube (Q5), and the other end of the thirteenth resistor (R13) is grounded; One end of the discharge resistor (R0) is connected to the output end of the protection circuit (30), and the other end of the discharge resistor (R0) is connected to the current input end of the fifth switch tube (Q5); The control end of the fifth switch tube (Q5) is connected to the output end of the detection circuit (201), and the current output end of the fifth switch tube (Q5) is grounded.

18. The power connection device according to claim 1, characterized in that: It also includes a power supply board (50); the power supply module is deployed on the power supply board (50); The power supply board (50) comprises a power connection assembly (J1) and a signal connection assembly (J2); The power pin (11) is connected to the power supply module via the power connection assembly (J1), and the signal pin (12) is connected to the power supply module via the signal connection assembly (J2).

19. The power connection device according to claim 18, characterized in that: The power pin (11) comprises a first power supply contact (111) and a first ground contact (112), and the signal pin (12) comprises a second power supply contact (121) and a second ground contact (122); The power connection assembly (J1) includes a first power supply terminal (a1) and a first ground terminal (b1), and the signal connection assembly (J2) includes a second power supply terminal (a2) and a second ground terminal (b2); The first power supply contact (111) is connected to the first power supply terminal (a1), and the first grounding contact (112) is connected to the first grounding terminal (b1); the second power supply contact (121) is connected to the second power supply terminal (a2), and the second grounding contact (122) is connected to the second grounding terminal (b2).

20. An electronic node, characterized in that: Comprising a power connection device as claimed in any one of claims 1 to 19.

Images