Power connection device and electronic node

Abstract

The present invention relates to the field of computer technology, and discloses a power connection device and an electronic node. The power connection device includes: a power connector and a power supply module; the power supply module includes 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 first control circuit is configured to: output a first control signal when the signal pin is not powered; output a second control signal when the signal pin is powered; the protection circuit is configured to: stop working when the first control signal is connected to the control end; control the output end to supply power to the electronic node when the second control signal is connected to the control end. Based on the two types of pins that contact the power supply busbar successively, the present invention can provide corresponding signals to the subsequent power supply module successively, cooperate with the subsequent power supply module to achieve safe hot plugging, and has a simple structure and low cost.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and particularly 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 beneficial to improving the computing power density. In order to be able to add or remove some internal electronic nodes without shutting down the whole cabinet system, it is required that the electronic nodes can achieve hot plugging. Summary of the Invention

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

[0004] In a first aspect, the present invention provides a power connection device, including a power connector and a power supply module; the power supply module includes a first control circuit and a protection circuit;

[0005] The power connector includes power pins and signal pins; the power pins are located outside the signal pins;

[0006] The input end of the first control circuit is connected to the signal pins, and the output end is connected to the control end of the protection circuit;

[0007] The first control circuit is configured to: output a first control signal when the signal pins are not powered; output a second control signal when the signal pins are powered;

[0008] The input end of the protection circuit is connected to the power pins; the protection circuit is configured to: stop working when the first control signal is connected to the control end; control the output end to supply power to the electronic node when the second control signal is connected to the control end.

[0009] In a second aspect, the present invention provides an electronic node, including: the power connection device according to the first aspect or any corresponding embodiment thereof.

[0010] The power connection device provided by an embodiment of the present invention includes a power connector and a power supply module. The power connector is provided with power pins and signal pins in sequence from outside to inside, such that during hot plugging and unplugging, the power pins are closer to the power supply bus bar. When plugging in the power connector, the power pins are powered first, and when unplugging the power connector, the signal pins are disengaged first. There is a transition period during which the power pins are in contact with the power supply bus bar but the signal pins are not in contact with the power supply bus bar. During this transition period, power is not supplied to the electronic node, so that when the power pins are connected to or disconnected from the power supply bus bar, it will not affect the backend electronic node, and there is no large current, enabling safe hot plugging of the electronic node. Moreover, the structure of the power connector is simple, and the power supply module can be realized based on a simple circuit without the need for complex control logic, with a simple implementation method and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 is a schematic diagram of an electronic node obtaining power from a power supply bus bar according to an embodiment of the present invention;

[0013] Figure 2 is a schematic structural diagram of a power connection device according to an embodiment of the present invention;

[0014] Figure 3 is a schematic structural diagram of a power connector according to an embodiment of the present invention;

[0015] Figure 4 is another schematic structural diagram of a power connection device according to an embodiment of the present invention;

[0016] Figure 5 is yet another schematic structural diagram of a power connection device according to an embodiment of the present invention;

[0017] Figure 6 is a first schematic structural diagram of a power supply module according to an embodiment of the present invention;

[0018] Figure 7 is a second schematic structural diagram of a power supply module according to an embodiment of the present invention;

[0019] Figure 8 is a third schematic structural diagram of a power supply module according to an embodiment of the present invention;

[0020] Figure 9It is the fourth schematic structural diagram of the power supply module according to an embodiment of the present invention;

[0021] Figure 10 It is the fifth schematic structural diagram of the power supply module according to an embodiment of the present invention;

[0022] Figure 11 It is the sixth schematic structural diagram of the power supply module according to an embodiment of the present invention;

[0023] Figure 12 It is the seventh schematic structural diagram of the power supply module according to an embodiment of the present invention;

[0024] Figure 13 It is the eighth schematic structural diagram of the power supply module according to an embodiment of the present invention;

[0025] Figure 14 It is the ninth schematic structural diagram of the power supply module according to an embodiment of the present invention;

[0026] Figure 15 It is the tenth schematic structural diagram of the power supply module according to an embodiment of the present invention;

[0027] Figure 16 It is the eleventh schematic structural diagram of the power supply module according to an embodiment of the present invention;

[0028] Figure 17 It is the twelfth schematic structural diagram of the power supply module according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 10. Power connector; 20. First control circuit; 30. Protection circuit; 40. Second control circuit; 50. Power supply board; 100. Power supply busbar; J1. Power connection assembly; J2. Signal connection 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; 202. 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 implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0033] In the present invention, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, to better illustrate the present invention, numerous specific details are given in the following specific embodiments. Those of ordinary skill in the art should understand that the present invention can still be implemented without some specific details. In some instances, methods, means, and elements well known to those of ordinary skill in the art are not described in detail to highlight the gist of the present invention.

[0035] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] As a key device for achieving high computing power density, high interconnection bandwidth, high power density, and high energy efficiency, the hot-swap technology of internal electronic nodes in a whole cabinet becomes particularly important. The hot-swap technology allows adding or removing electronic nodes without shutting down the entire system, thereby improving the availability and flexibility of the system.

[0037] Figure 1 Fig. shows a schematic diagram of a power supply architecture of a cabinet server. The cabinet server inserts one or more independently operable server nodes, switching nodes, and other electronic nodes in a cabinet. As Figure 1As 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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 .

[0044] The input terminal of the first control circuit 20 is connected to the signal pin 12, and the output terminal is connected to the control terminal 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; output a second control signal when the signal pin 12 is powered.

[0045] The input terminal of the protection circuit 30 is connected to the power supply pin 11; the protection circuit 30 is configured to: stop working when the first control signal is applied to the control terminal; control the output terminal to supply power to the electronic node when the second control signal is applied to the control terminal.

[0046] In this embodiment, the power connection device is used to draw power from the power supply busbar 100, and it at least includes a power connector 10 for accessing the power supply busbar 100. Among them, the power connector 10 mainly includes an insulating body and pins for conducting electricity, that is, the power supply pin 11. Power is drawn from the power supply busbar 100 by using the power supply pin 11, and thus power can be supplied to the electronic node. The power connector 10 can adopt various structural forms, such as a gold finger power connector, a power clip, etc.

[0047] Figure 2 In, the power connector 10 with a power clip structure is taken as an example; as Figure 2 shown, the power connector 10 includes a U-shaped insulating body, which forms a slot, and the power supply pin 11 is arranged in the slot; by plugging the power connector 10 into the power supply busbar 100, the electrical connection between the power supply pin 11 and the power supply busbar 100 can be realized, and thus power supply can be realized.

[0048] And, as Figure 2 shown, the power connector 10 further includes a signal pin 12; among them, the power supply pin 11 and the signal pin 12 are arranged side by side, and the power supply pin 11 is located outside the signal pin 12, that is, the power supply pin 11 is more outward, so that when the power connector 10 is plugged into the power supply busbar 100, the power supply pin 11 contacts the power supply busbar 100 first, and the signal pin 12 contacts the power supply busbar 100 later.

[0049] The position of the power supply busbar 100 is generally fixed. When power needs to be supplied to the electronic node, for example, when the electronic node is assembled into the cabinet, the power connector 10 can be plugged into the power supply busbar 100. As Figure 2 shown, the plugging direction of the power connector 10 is from right to left to plug the power connector 10 onto the power supply busbar 100. In the plugging direction of the power connector 10, the signal pin 12 and the power supply pin 11 are arranged in sequence, or rather, the power supply pin 11 is located at a more outward position of the power connector 10 relative to the signal pin 12.

[0050] As Figure 2As shown, for the power connector 10 of the power clip structure, both the power pins 11 and the signal pins 12 are disposed within the slot of the power connector 10, and from the inside to the outside are the signal pins 12 and the power pins 11 in sequence, or rather, the signal pins 12 are disposed on the side of the power pins 11 close to the bottom of the slot.

[0051] For the power connector 10 provided in this embodiment, since the power pins 11 are located outside the signal pins 12, when the power connector 10 is plugged into the power supply bus bar 100, the power pins 11 contact the power supply bus bar 100 first, and the signal pins 12 contact the power supply bus bar 100 later. Based on the two types of pins that contact the power supply bus bar 100 successively, corresponding signals can be provided to the subsequent power supply module successively, and cooperate with the subsequent power supply module to achieve safe hot plugging.

[0052] Specifically, the power supply module includes a first control circuit 20 and a protection circuit 30. As Figure 2 shown, the input end ( Figure 2 the upper end of the first control circuit 20 in Figure 2 the right end of the first control circuit 20 in Figure 2 the left end of the protection circuit 30 in

[0053] When the signal pins 12 are not powered, that is, when the signal pins 12 are not connected to the power supply bus bar 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 floating. At this time, the output end of the first control circuit 20 outputs a control signal, that is, a first control signal, and this first control signal can be sent to the control end of the protection circuit 30. When the signal pins 12 are powered, that is, when the signal pins 12 are connected to the power supply bus bar 100, the input end of the first control circuit 20 will collect the corresponding electrical signal. For example, a high-level signal provided by the power supply bus bar 100. 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, and this second control signal can also be sent to the control end of the protection circuit 30, so that the protection circuit 30 can perform different processes based on different control signals.

[0054] For the protection circuit 30, as Figure 2 shown, the input end ( Figure 2 the upper end of the protection circuit 30 in Figure 2 is connected to the power pins 11, and the output end of the protection circuit 30 is used to supply power to the electronic node, such as supplying power to node loads such as a processor and a radiator in the electronic node.It is not shown in the figure. Among them, 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 to work at this time, and according to the power supply provided by the power supply pin 11 connected to the input end, controls its output end to supply power to the electronic node at the back end.

[0055] Among them, the protection circuit 30 can specifically be a level conversion circuit with a protection function. When the protection circuit 30 works, it can convert the level connected to the input end (that is, the level introduced by the power supply pin 11 from the power supply bus bar 100) into the level required by the electronic node at the back end. 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). Whether the electronic fuse works is controlled by a control signal. When the electronic fuse works, its input end and output end are conducted, so that the power taken from the power supply bus bar 100 by the power supply pin 11 can be transmitted to the electronic node at the back end. At this time, a level conversion circuit is arranged at the output end of the electronic fuse to be able to provide the level required for the operation of the electronic node. Generally, the power supply bus bar 100 provides 54V of direct current. If the operating voltage of the electronic node is 12V, it is necessary to use a level conversion circuit to convert 54V to 12V.

[0056] For a traditional power connector, during the hot plugging and unplugging process, due to the relatively high voltage provided by the power supply bus bar, which is generally 54V at present, a large surge current will be generated at the moment when the power connector is connected or disconnected from the DC bus bar, which may not only impact the internal components of the electronic node, but also cause arc ignition and heating due to ionization, thus bringing potential safety hazards.

[0057] 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:

[0058] When inserting the power connector 10 into the power supply busbar 100 of the cabinet, since the power pins 11 are located outside the signal pins 12, the power pins 11 are powered first (come into contact with the power supply busbar 100 first). At this time, the signal pins 12 are not powered, so the first control circuit 20 outputs a first control signal. Although the input end of the protection circuit 30 is connected to the power supply 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 end and the output end of the protection circuit 30 are disconnected, that is, the power pins 11 are not connected to the backend electronic node. At the moment when the power pins 11 come into contact with the power supply busbar 100, since the protection circuit 30 does not work at this time and is in an open state, no large current will be generated between the power pins 11 and the power supply busbar 100.

[0059] When continuing to insert the power connector 10, the signal pins 12 are powered, that is, the signal pins 12 come into contact with the power supply busbar 100 later. At this time, the first control circuit 20 outputs a second control signal. For the protection circuit 30, its input end is first connected to the power supply provided by the power pins 11, and then the control end of the protection circuit 30 receives the second control circuit. At this time, the protection circuit 30 starts to work. That is, after the protection circuit 30 is connected to the power supply provided by the power pins 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, no large current will exist at this time, so that the backend electronic node can be safely powered on.

[0060] When pulling out the power connector 10, it is the opposite of the insertion process. Specifically, when pulling out the power connector 10, the signal pins 12 lose power first, that is, the signal pins 12 are separated from the power supply busbar 100 first. At this time, the first control circuit 20 outputs a first control signal again, so that the protection circuit 30 is switched 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.

[0061] Continue to pull out the power connector 10, and the power pins 11 lose power later, that is, the power pins 11 are separated from the power supply busbar 100 later; similar to the above insertion process, since the protection circuit 30 does not work at this time and the input end and the output end of the protection circuit 30 are disconnected, that is, the power pins 11 are not connected to the backend electronic node, no large current will be generated between the power pins 11 and the power supply busbar 100 at the moment when the power pins 11 come into contact with the power supply busbar 100.

[0062] 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 busbar 100, since the signal collected by the signal pin 12 is used to control the protection circuit 30 and it does not supply power to the backend electronic nodes, there will be no large current at this time, that is, it will not affect the power supply situation of the backend electronic nodes.

[0063] The power connection device provided by the embodiment of the present invention includes a power connector 10 and a power supply module. The power connector is sequentially provided with a power pin 11 and a signal pin 12 from outside to inside, so that during hot plugging, the power pin 11 is closer to the power supply busbar 100. When the power connector 10 is plugged in, the power pin 11 is powered on first. When the power connector 10 is unplugged, the signal pin 12 is disengaged first. There is a transition period during which the power pin 11 contacts the power supply busbar 100 but the signal pin 12 does not contact the power supply busbar 100. During the transition period, power is not supplied to the electronic nodes, so that when the power pin 11 is connected to or disconnected from the power supply busbar 100, it will not affect the backend electronic nodes, and there is no large current, enabling safe hot plugging of the electronic nodes. Moreover, the structure of the power connector 10 is simple, and the power supply module can be realized based on a simple circuit without complex control logic, with a simple implementation method and low cost.

[0064] In some optional embodiments, since the power supply busbar 100 includes a positive electrode and a negative electrode, the positive electrode is used to provide power, such as 54V DC power, and the negative electrode of the power supply busbar 100 provides ground (Gnd); correspondingly, the power pin 11 and the signal pin 12 also include two contacts, which are respectively used to connect the positive electrode and the negative electrode of the power supply busbar 100.

[0065] Specifically, as Figure 3 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 electrode of the power supply busbar 100, and the first ground contact 112 is used to connect to the negative electrode of the power supply busbar 100.

[0066] 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 connect to the positive electrode of the power supply busbar 100, and the second ground contact 122 is used to connect to the negative electrode of the power supply busbar 100. Figure 3 In, gray graphics are used to represent components related to power, such as the positive electrode of the power supply busbar 100, the first power supply contact 111, the second power supply contact 121, etc.

[0067] Among them, in the plugging direction of the power connector 10, the first ground contact 112 is more outward relative to the first power supply contact 111; and / or, in the plugging direction of the power connector 10, the second ground contact 122 is more outward relative to the second power supply contact 121.

[0068] In this embodiment, in the insertion direction of the power connector 10, the first grounding contact 112 is more outward than the first power supply contact 111. When the power connector 10 is inserted, the first grounding contact 112 first contacts the negative pole of the power supply bus bar 100, and then the first power supply contact 111 contacts the positive pole of the power supply bus bar 100. As Figure 3 shown, in the insertion 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 d1 between the two.

[0069] Similarly, for the signal pin 12, in the insertion direction of the power connector 10, the second grounding contact 122 is more outward than the second power supply contact 121. When the power connector 10 is inserted, the second grounding contact 122 first contacts the negative pole of the power supply bus bar 100, and then the second power supply contact 121 contacts the positive pole of the power supply bus bar 100. As Figure 3 shown, in the insertion 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 d2 between the two.

[0070] In this embodiment, when the power connector 10 is inserted, since the first grounding contact 112 is more outward, the first grounding contact 112 first contacts the negative pole of the power supply bus bar 100, so that the power connection device (especially the power supply module therein) can be grounded first, providing a grounding path for the device housing or conductive components, discharging the static electricity accumulated by the human body or the device in advance, and avoiding damage to sensitive electronic components due to electrostatic discharge (ESD). Moreover, the power connection device is grounded first and then connected to the positive pole. The grounded wire in contact can balance the electric potential between the power connection device and the power supply bus bar 100, reduce the generation of electric arcs, and also effectively reduce the probability of generating instantaneous surge currents, so as to protect the power connection device and extend its service life.

[0071] In addition, contrary to the insertion process, when the power connector 10 is unplugged, the first power supply contact 111 first disconnects from the power supply bus bar 100, and then the first grounding contact 112 disconnects, that is, the positive pole is disconnected first and then the ground wire is disconnected, which can ensure that there is always grounding protection during the power-off process and reduce the risk caused by residual charges and the like.

[0072] Similarly, the second grounding contact 122 is more outward than the second power supply contact 121 and has the same effect, which will not be elaborated here.

[0073] It can be understood that since the signal pin 12 is mainly used to generate control signals, and when it is connected to the power supply busbar 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 (i.e., the second grounding contact 122 is more outward relative to the second power supply contact 121). This embodiment does not limit this. However, for safety reasons, the two pins of the power supply pin 11 need to be one in front of the other, that is, the first grounding contact 112 is more outward relative to the first power supply contact 111.

[0074] Optionally, since the second grounding contact 122 of the signal pin 12 can also be used to detect whether the signal pin 12 is powered, in order to ensure that the protection circuit 30 starts to work after the power supply pin 11 is connected to the power supply busbar 100 accurately, in this embodiment, in the insertion direction of the power connector 10, the first power supply contact 111 is more outward relative to the second grounding contact 122.

[0075] As Figure 3 shown, there is also a certain distance between the first power supply contact 111 and the second grounding contact 122, so that when the power connector 10 is inserted, 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, ensuring that the sequence of contact meets the requirements.

[0076] In some alternative embodiments, as shown in Figure 4 shown, the power connection device further 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 the first control circuit 20 and the protection circuit 30 are provided on the power supply board 50.

[0077] And, as Figure 4 shown, the power supply board 50 further includes a power connection component J1 and a signal connection component J2; among them, the power supply pin 11 is connected to the power supply module through the power connection component J1, and the signal pin 12 is connected to the power supply module through the signal connection component J2.

[0078] Specifically, the power supply pin 11 can be connected to the input end of the protection circuit 30 through the power connection component J1. The signal pin 12 can be connected to the input end of the first control circuit 20 through the signal connection component J2. Among them, the power connection component J1 and the signal connection component J2 are both components that facilitate the electrical connection between the circuit board and other pins, such as terminal blocks, etc.

[0079] 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 the connection method between the power connector 10 and the power supply module is more flexible and convenient for disassembly.

[0080] Optionally, as Figure 5 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. Correspondingly, the power connection component J1 includes a first power supply terminal a1 and a first ground terminal b1, and the signal connection component J2 includes a second power supply terminal a2 and a second ground terminal b2.

[0081] Among them, 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 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.

[0082] Correspondingly, each terminal in the connection component is connected to the circuit of the power supply module. Since the first ground contact 112 is more outward, it can be used as the ground of the entire power supply module. Specifically, as Figure 5 shown, the first ground contact 112 is connected to the protection circuit 30 through the first ground terminal b1 and serves as the ground (Gnd) of the protection circuit 30; while 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, and then the protection circuit 30 supplies power to the subsequent node loads based on the power supply Vin.

[0083] Similarly, the second power supply contact 121 and / or the second ground contact 122 can also be connected to the first control circuit 20 through the second power supply terminal a2 and / or the second ground terminal b2, Figure 5 Taking the second power supply contact 121 being connected to the first control circuit 20 through the second power supply terminal a2 as an example, so that the first control circuit 20 can detect whether the second power supply contact 121 is powered on.

[0084] In some alternative embodiments, another 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 on and the power pin 11 is powered on.

[0085] In this embodiment, refer to Figure 6As 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 judge the energization states 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 busbar 100. Figure 6 In the following and related drawings, IN represents the input end of the protection circuit 30, EN represents the control end of the protection circuit 30, and OUT represents the output end of the protection circuit 30.

[0086] For example, the first control circuit 20 can be an AND gate circuit. 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 energized and the power pin 11 is energized, both input ends of the AND gate circuit will be at a high level, and only then will the AND gate circuit output a high level. When only one pin is energized (for example, only the power pin 11 is energized) or both pins are not energized, the AND gate circuit outputs a low level, so as to be able to distinguish different control signals and facilitate the control of the subsequent protection circuit 30.

[0087] Optionally, since the first control circuit 20 also needs power during operation, in this embodiment, the power pin 11 is connected to the power supply end of the first control circuit 20 to be able to supply power to the first control circuit 20; and the first control circuit 20 mainly needs to detect whether the signal pin 12 is energized.

[0088] Specifically, referring to Figure 7 As shown, the first control circuit 20 includes a detection circuit 201 and a first switch circuit 202.

[0089] Among them, 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 detects that the signal pin 12 is energized.

[0090] The power supply end of the first switch circuit 202 is connected to the power 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 it does not receive a detection signal; output a second control signal when it receives a detection signal.

[0091] 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 be able to detect whether the signal pin 12 is in contact with the power supply busbar 100.

[0092] Among them, if the detection circuit 201 detects that the signal pin 12 is powered on, that is, it 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 powered on to the first switch circuit 202, that is, the detection signal. When the detection circuit 201 does not detect the signal pin 12, the detection circuit 201 may not work (or has no effect, equivalent to the non - existence of the detection circuit 201), or the detection circuit 201 outputs other signals different from the detection signal, that is, the subsequent first switch circuit 202 will not receive the detection signal.

[0093] 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 contacts the power supply busbar 100. When the second power supply contact 121 becomes high - level, it can be determined that the second power supply contact 121 contacts the power supply busbar 100, that is, the signal pin 12 is powered on. At this time, the output end of the detection circuit 201 outputs a corresponding detection signal, and this detection signal corresponds to the power - on of the signal pin 12.

[0094] And, as Figure 7 shown, in addition to being connected to the input end IN of the protection circuit 30, the power supply pin 11 is also connected to the input end of the first switch circuit 202 to be able to provide the power supply Vin for the protection circuit 30 and the first switch circuit 202. Specifically, the first power supply contact 111 of the power supply pin 11 connects the input end IN of the protection circuit 30 and the input end of the first switch circuit 202.

[0095] During the process of the power supply connector 10 being plugged into the power supply busbar 100, the power supply pin 11 contacts the power supply busbar 100 first, that is, the power supply pin 11 is powered on first, and the first power supply contact 111 is at a high level (for example, 54V), so as to be able to provide the power supply Vin for the subsequent first switch circuit 202 and the protection circuit 30, that is, the first switch circuit 202 has been connected to the power supply capable of working. Since the signal pin 12 is not powered on 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. At this time, the first switch circuit 202 outputs a first control signal to the control end EN of the protection circuit 30; as described above, the protection circuit 30 does not work at this time.

[0096] Continue to plug in the power supply connector 10 so that the signal pin 12 contacts the power supply busbar 100, that is, the signal pin 12 is powered on. At this time, the detection circuit 201 outputs a detection signal, and the first switch circuit 202 responds to this 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 supply Vin connected to the input end IN, controls the output end OUT of the protection circuit 30 to output a corresponding voltage to be able to supply power to the node load.

[0097] 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 supply pin 11, so as to isolate the two pins while detecting the powered states of the respective pins; the detection circuit 201 and the first switch circuit 202 have clear division of labor to ensure the stable operation of the circuit.

[0098] 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. And the first switch circuit 202 includes a first switching transistor Q1.

[0099] The control end of the first switching transistor Q1 is connected to the output end of the detection circuit 201, and the output loop of the first switching transistor Q1 is connected to the control end of the protection circuit 30. The first switching transistor Q1 is configured to: control the on / off of the output loop according to the detection signal so as to change the level state of the output end of the first switch circuit 202.

[0100] In this embodiment, the control signal output by the first switch circuit 202 is a level signal. By outputting level signals of different magnitudes, the first control signal or the second control signal can be output. Among them, the control end EN of the protection circuit 30 is also the enable end 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 as a low-level signal and the second control signal is set as a high-level signal.

[0101] Moreover, after the power supply pin 11 contacts the power supply bus bar 100, the input end of the first switch circuit 202 is connected to the power supply Vin. If the detection signal is designed as a high level, the detection signal is likely to affect each other with the power supply Vin. Therefore, in this embodiment, the detection signal is set as a low level to ensure that the detection signal only plays a control role.

[0102] To simply implement the first switch circuit 202, a switching transistor, that is, the first switching transistor Q1, is provided for the first switch circuit 202. By controlling the conduction state of the first switching transistor 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 switching transistor Q1 is connected to the output end of the detection circuit 201, that is, the control end of the first switching transistor Q1 can receive the detection signal, and thus can control the on / off of the output loop according to the detection signal.

[0103] Among them, the output circuit refers to a circuit in which a switching tube can control the on / off state of the subsequent stage under the action of an input control signal. Among them, after the switching tube is turned on, current can flow into one end of the switching tube and flow out from the other end of the switching tube, that is, the output circuit is turned on; subsequently, the two ends corresponding to the output circuit of the switching tube are respectively called the current input end and the current output end. By controlling whether the output circuit is turned on, the signal output from the output end of the first switching circuit 202 can be adjusted, so that a corresponding first control signal or second control signal can be output.

[0104] In this embodiment, the switching tube can specifically be a triode or a field effect transistor (MOS). For example, if the switching tube is a triode, the base of the triode is the control end, and its collector and emitter are the current input end and the current output end; if the switching tube is a field effect transistor, the gate of the field effect transistor is the control end, and its source and drain are the current input end and the current output end.

[0105] Optionally, as shown in Figure 8 In addition to including the first switching tube Q1, the first switching circuit 202 further includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.

[0106] As shown in Figure 8 One end of the first resistor R1 is connected to the power supply pin 11, and the other end of the first resistor R1 is connected to the control end of the first switching tube Q1. One end of the second resistor R2 is connected to the control end of the first switching tube Q1, and the other end of the second resistor R2 is grounded. Among them, the ground of the first switching circuit 202 can be provided by the first grounding contact 112 of the power supply pin 11 to ensure that the first switching circuit 202 can work normally after being connected to the power supply Vin.

[0107] Specifically, one end of the first resistor R1 is 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 supply connection component J1. It can be understood that other ends connected to the power supply pin 11 can also adopt a similar connection method, which will not be elaborated hereinafter.

[0108] One end of the third resistor R3 is connected to the power supply pin 11, and the other end of the third resistor R3 is connected to the current input end of the first switching tube Q1. One end of the fourth resistor R4 is connected to the current input end of the first switching tube Q1, and the other end of the fourth resistor R4 is grounded.

[0109] The current output terminal of the first switching transistor Q1 is grounded; the current input terminal of the first switching transistor Q1 is the output terminal of the first switching circuit 202, that is, the current input terminal of the first switching transistor Q1 is connected to the control terminal EN of the protection circuit 30. The first switching transistor Q1 is configured to: turn on the first switching transistor Q1 when no detection signal is received; turn off the first switching transistor Q1 when a detection signal is received.

[0110] In this embodiment, the power supply Vin connected to the first switching circuit 202 is provided by the power supply busbar 100, and its voltage is generally 54V, with a relatively high voltage level. To avoid too high a voltage at the control terminal of the first switching transistor Q1, a voltage-dividing resistor is formed based on the first resistor R1 and the second resistor R2, thereby reducing the access voltage at the control terminal of the first switching transistor Q1. Similarly, the level signal required at the control terminal EN of the protection circuit 30 is generally a signal with a relatively low voltage level, such as 12V, 3V, etc. Therefore, in this embodiment, a voltage-dividing resistor is also formed by the third resistor R3 and the fourth resistor R4, so as to be able to provide a control signal of an appropriate magnitude for the control terminal EN of the protection circuit.

[0111] Moreover, when the control terminal of the first switching transistor Q1 does not receive a detection signal, under the voltage-dividing action of the first resistor R1 and the second resistor R2, the control terminal of the first switching transistor Q1 is at a high level, and the first switching transistor Q1 is turned on, that is, the output loop of the first switching transistor Q1 is turned on; if the control terminal of the first switching transistor Q1 receives a detection signal, that is, the control terminal is at a low level, at this time the first switching transistor Q1 is turned off, that is, the output loop of the first switching transistor Q1 is turned off.

[0112] Specifically, the first switching transistor Q1 can be an NMOS or NPN type triode, which can meet the above configuration requirements. Taking Figure 8 as an example, the first switching transistor Q1 is an NMOS, its gate is the control terminal, the drain is the current input terminal (connected to the connection node between the third resistor R3 and the fourth resistor R4), and the source is the current output terminal and is grounded.

[0113] For Figure 8 the first control circuit 20 shown, its working principle is as follows:

[0114] When the power connector 10 is plugged into the power supply busbar 100, the power pin 11 is powered first. Therefore, 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 at this time the detection circuit 201 does not work (or outputs a high-level signal, and this embodiment does not elaborate on this situation). Through the voltage division of the first resistor R1 and the second resistor R2, the gate of the first switch tube Q1 is at a high level, meeting the conduction condition, that is, the first switch tube Q1 conducts. The conducting 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.

[0115] Continue to insert the power connector 10. After that, the signal pin 12 is powered, and the detection circuit 201 outputs a low-level detection signal, making the gate of the first switch tube Q1 at a low level, and the first switch tube Q1 turns off. At this time, under the voltage division of the third resistor R3 and the fourth resistor R4, a divided high-level voltage 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.

[0116] When the power connector 10 is unplugged, its working principle is similar to the above, and will not be elaborated here.

[0117] In this embodiment, multiple resistors are arranged in the first switch circuit 202 and cooperate with the first switch tube Q1 to work. The circuit structure is simple, which can not only reduce the influence of the relatively high power supply Vin, but also ensure the output of corresponding control signals as required. Moreover, using devices such as NMOS as the first switch tube Q1 also has a relatively low cost.

[0118] Optionally, the first switch tube Q1 can also use devices such as PMOS. And, as Figure 9 shown, in addition to the first switch tube Q1, the first switch circuit 202 may further include a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7.

[0119] As Figure 9 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.

[0120] 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.

[0121] Among them, the connection node between the sixth resistor R6 and the seventh resistor R7 is the output end of the first switch circuit 202, which is connected to the control end EN of the protection circuit 30 and is used to output a corresponding control signal. The first switch transistor Q1 is configured to: turn off the first switch transistor Q1 when no detection signal is received; turn on the first switch transistor Q1 when a detection signal is received.

[0122] In this embodiment, the sixth resistor R6 and the seventh resistor R7 are similar in function to the above-mentioned third resistor R3 and fourth resistor R4, and can provide a suitable control signal (enable signal) for the control end EN of the protection circuit 30 by voltage division.

[0123] In addition, for Figure 9 the first switch transistor Q1 shown, when its control end does not receive a detection signal, the control end of the first switch transistor Q1 is at a high level, and the first switch transistor Q1 is turned off, that is, the output loop of the first switch transistor Q1 is turned off; if the control end of the first switch transistor Q1 receives a detection signal, that is, the control end is at a low level, at this time the first switch transistor Q1 is turned on, that is, the output loop of the first switch transistor Q1 is turned on.

[0124] Specifically, the first switch transistor Q1 can be a PMOS or PNP type triode, which can meet the above configuration requirements. Taking Figure 9 the one shown as an example, the first switch transistor Q1 is a PMOS, its gate is the control end, the source is the current input end (connected to the power supply pin 11), and the drain is the current output end to connect to one end of the sixth resistor R6.

[0125] For Figure 9 the first control circuit 20 shown, its working principle is as follows:

[0126] When the power connector 10 is plugged into the power supply busbar 100, the power supply 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 at this time the detection circuit 201 does not work; since there is no current passing through the fifth resistor R5, the electric potentials at both ends of the fifth resistor R5 are the same, that is, the gate voltage of the first switch transistor Q1 is also Vin, which does not meet the conduction condition of the first switch transistor Q1, that is, the first switch transistor Q1 is turned off. At this time, there is also 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, and it is at a low level, that is, the first switch circuit 202 outputs a low-level first control signal.

[0127] Continue to insert the power connector 10. After that, the signal pin 12 is powered on, and the detection circuit 201 outputs a detection signal of low level, making the gate of the first switching transistor Q1 at low level, and the first switching transistor Q1 conducts; at this time, the upper end of the sixth resistor R6 is connected to the power supply Vin, and under the voltage division of the sixth resistor R6 and the seventh resistor R7, a divided high level can be provided to the control terminal EN of the protection circuit 30, that is, the first switching circuit 202 outputs a second control signal of high level, and then the protection circuit 30 starts to work.

[0128] Among them, to avoid a relatively large gate-source voltage when the first switching transistor Q1 conducts, the detection circuit 201 may also be provided with a pull-down resistor. When the detection circuit 201 outputs a detection signal, this pull-down resistor and the fifth resistor R5 form a voltage-dividing resistor to protect the first switching transistor Q1.

[0129] In this embodiment, the first switching circuit 202 can also be implemented based on devices such as PMOS. However, since the cost of NMOS is relatively low, it is preferably to use NMOS as the first switching transistor Q1, and the following mainly uses Figure 8 the shown first switching circuit 202 for explanation.

[0130] Optionally, the detection circuit 201 includes: a second switching transistor Q2; wherein, the control terminal of the second switching transistor Q2 is used to be connected to the signal pin 12, and the output loop of the second switching transistor Q2 is connected to the control terminal of the first switching circuit 202.

[0131] The second switching transistor Q2 is configured to: control the on-off of the output loop according to whether the signal pin 12 is powered on, so as to control whether the output terminal of the detection circuit 201 outputs a detection signal of low level. Specifically, when it is not detected that the signal pin 12 is powered on, the second switching transistor Q2 is turned off, and at this time the detection circuit 201 does not work; when it is detected that the signal pin 12 is powered on, the second switching transistor Q2 conducts, and at this time the detection circuit 201 outputs a detection signal of low level.

[0132] See Figure 10 As shown, the detection circuit 201 specifically includes: a second switching transistor Q2, an eighth resistor R8, and a ninth resistor R9.

[0133] 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 terminal of the second switching transistor Q2; one end of the ninth resistor R9 is connected to the control terminal of the second switching transistor Q2, and the other end of the ninth resistor R9 is grounded.

[0134] The current input terminal of the second switching transistor Q2 is connected to the control terminal of the first switching circuit 202 (for example, connected to the control terminal of the first switching transistor Q1), and the current output terminal of the second switching transistor Q2 is grounded. The second switching transistor Q2 is configured to: turn off the second switching transistor Q2 when the signal pin 12 is not powered; turn on the second switching transistor Q2 when the signal pin 12 is powered.

[0135] In this embodiment, the eighth resistor R8 and the ninth resistor R9 can also form a voltage-dividing resistor, and their working principle is similar to that of the above-mentioned first resistor R1 and second resistor R2, both of which are to ensure that the switching transistor can also work safely when a 54V high-level voltage is connected.

[0136] The second switching transistor Q2 can be an NMOS or NPN type triode, which can meet the above configuration requirements. Taking Figure 10 as an example, the second switching transistor Q2 is an NMOS, its gate is the control terminal, the drain is the current input terminal (for connecting to the control terminal of the first switching transistor Q1), and the source is the current output terminal and is grounded.

[0137] And, as Figure 10 shown, one end of the eighth resistor R8 is connected to the second power supply terminal a2 of the signal wiring component J2, so as to realize the connection to the signal pin 12. And, the ground of the detection circuit 201 is slightly different from the ground of the first switching circuit 202. As Figure 10 shown, the second ground terminal b2 of the signal wiring component 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 supply pin 11 are both the ground of the power supply bus bar 100, after the power supply connector 10 is fully plugged in, the ground of the detection circuit 201 and the ground of the first switching circuit 202 are the same ground, which will not affect the stable operation of the power supply module.

[0138] For Figure 10 the detection circuit 201 shown, its working principle is as follows:

[0139] 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 bus bar 100. When the signal pin 12 is not powered, the signal wiring component J2 is not connected to any level. At this time, the control terminal of the second switching transistor Q2 is at a low level (or floating), and the second switching transistor Q2 remains off. At this time, the detection circuit 201 does not work and will not affect the working state of the subsequent first switching circuit 202.

[0140] When the second power supply contact 121 becomes high level, it can be determined that the second power supply contact 121 touches the power supply bus bar 100, that is, the signal pin 12 is powered on. At this time, the second power supply terminal a2 becomes high level, such as 54V. Under the voltage division of the eighth resistor R8 and the ninth resistor R9, the gate of the second switching transistor Q2 is at high level, meeting the conduction condition, that is, the second switching transistor Q2 conducts. The conducting second switching transistor Q2 pulls down the control terminal of the first switching circuit 202 (that is, the control terminal of the first switching transistor Q1), so as to output a detection signal of low level.

[0141] In addition, as Figure 11 shown, if the first switching transistor Q1 is a PMOS, the detection circuit 201 can also adaptively output a corresponding detection signal. Among them, to avoid a large gate-source voltage when the first switching transistor Q1 conducts, the detection circuit 201 can also be provided with a pull-down resistor, which can be specifically arranged between the current output terminal of the second switching transistor Q2 and the ground ( Figure 11 not shown in the figure), so as to achieve the voltage division effect.

[0142] Or optionally, as shown in Figure 12 , the signal pin 12 includes a second grounding contact 122 for connecting to the negative pole of the power supply bus bar 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 terminal of the first switching circuit 202 (such as the control terminal of the first switching transistor Q1).

[0143] 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 terminal of the second switching transistor Q2. In this case, when the second grounding contact 122 of the signal pin 12 does not touch the power supply bus bar 100, it is equivalent to that the signal pin 12 is not powered on. 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 touches the power supply bus bar 100, the signal pin 12 is powered on, and the control terminal of the first switching transistor Q1 is pulled to the ground of the signal pin 12 (which is also the ground of the power supply pin 11, and both are the ground of the power supply bus bar 100), so as to output a detection signal of low level to the first switching circuit 202. Among them, due to the possible existence of suspended wires, for ensuring reliability, it is preferably to adopt the detection circuit 201 shown in Figure 10 .

[0144] It can be understood that to ensure that the detection circuit 201 shown in Figure 12 can work as required, after the power supply Vin is provided at the power supply pin 11, the signal pin 12 needs to be grounded. That is, in the insertion direction of the power supply connector 10, the first power supply contact 111 is more outward than the second grounding contact 122.

[0145] In this embodiment, the detection circuit 201 can conveniently convert the signal collected by the signal pin 12 into a detection signal with a low level by using the second switching transistor Q2, and the circuit structure is simple. Moreover, the second switching transistor Q2 can isolate the power supply contacts of the power supply pin 11 and the signal pin 12, avoiding the 54V DC power supply connected to the signal pin 12 from affecting the power supply state of other circuits at the back end.

[0146] In some alternative embodiments, when a hot plug operation is performed on an electronic node in a cabinet, since components such as the main board and hard disk in the electronic node have equivalent capacitances, and the protection circuit 30 also has filtering capacitors, etc., a surge current may also be generated when the power is cut off. To protect the node load in the electronic node, the power supply module may also have a discharging function.

[0147] See Figure 13 As shown, in addition to including the first control circuit 20 and the protection circuit 30, the power supply module further includes a second control circuit 40.

[0148] 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; stop working when the signal pin 12 is powered. For example, when the first control circuit 20 outputs a first control signal, discharge the output end of the protection circuit 30; when the first control circuit 20 outputs a second control signal, stop working.

[0149] In this embodiment, the second control circuit 40 mainly functions when the power connector 10 is pulled out from the power supply bus bar 100.

[0150] Specifically, when the power connector 10 is plugged into the power supply bus bar 100, the power supply pin 11 is first powered. As described above, at this time, the first control circuit 20 outputs a first control circuit to the control end EN of the protection circuit 30. At this time, the protection circuit 30 does not work, that is, the output end OUT of the protection circuit 30 does not output a voltage. Even if the second control circuit 40 discharges, it will not affect the operation of the protection circuit 30. After the signal pin 12 is powered, the first control circuit 20 outputs a second control circuit to the control end 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 function. Therefore, when the power connector 10 is plugged in, it can be considered that the second control circuit 40 never functions. The following in this embodiment mainly explains the working principle of the second control circuit 40 when the power connector 10 is pulled out.

[0151] After the power connector 10 is completely plugged into the power supply bus bar 100, the protection circuit 30 starts to work, and its output terminal OUT supplies power to the load node at the back end; 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.

[0152] 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; moreover, the second control circuit 40 starts to work, that is, the second control circuit 40 discharges the output terminal OUT of the protection circuit 30 to be able to discharge the charge in the node load or the capacitor of the protection circuit 30, avoiding the generation of surge current due to the stop of the protection circuit 30 and impacting the node load at the back end.

[0153] 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. And as described above, the protection circuit 30 that has stopped working can make the node load at the back end not affected by the disconnection of the power pin 11.

[0154] In addition, the output terminal OUT of the protection circuit 30 can specifically be connected to the power supply terminal of the second control circuit 40 to provide working power for 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, when the first control circuit 20 outputs the first control signal and the output terminal of the protection circuit 30 has an output voltage, the second control circuit 40 will discharge the output terminal of the protection circuit 30.

[0155] In this embodiment, the second control circuit 40 is arranged at the output terminal 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 terminal of the protection circuit 30, avoiding the generation of surge current due to the stop of the protection circuit 30 and playing a protective role for the node load.

[0156] Optionally, the second control circuit 40 is provided with a discharge resistor, and the discharge function is realized based on this discharge resistor. See Figure 14 As shown, the second control circuit 40 includes a second switch circuit 401 and a discharge resistor R0.

[0157] The discharge resistor R0 is connected in series in the discharge loop between the output terminal of the protection circuit 30 and the ground.

[0158] The second switch circuit 401 is configured to: control the discharge loop to conduct when the signal pin 12 is not powered; control the discharge loop to turn off when the signal pin 12 is powered.

[0159] In this embodiment, after the power connector 10 is fully plugged into the power supply busbar, the signal pin 12 is powered. At this time, the second switch circuit 401 controls the discharge loop between the output terminal OUT of the protection circuit 30 and the ground to turn off, that is, the discharge resistor R0 does not work. When the power connector 10 is unplugged, when the signal pin 12 loses power, the second switch circuit 401 controls the discharge loop between the output terminal OUT of the protection circuit 30 and the ground to conduct, so that the discharge resistor R0 connected in series to the discharge loop can discharge the output terminal OUT of the protection circuit 30, playing a protective role.

[0160] Optionally, based on whether the signal pin 12 is powered, the output terminal of the first control circuit 20 can output a corresponding control signal. Therefore, in this embodiment, as Figure 14 shown, the control terminal of the second switch circuit 401 is connected to the output terminal of the first control circuit 20; for example, the control terminal of the second switch circuit 401 is connected to the output terminal of the first switch circuit 202.

[0161] The second switch circuit 401 is configured to: control the discharge loop to conduct when the first control circuit 20 outputs a first control signal; control the discharge loop to turn off when the first control circuit 20 outputs a second control signal.

[0162] In this embodiment, the control signals (the first control signal, the second control signal) output by the first control circuit 20 not only enable the protection circuit 30, but also synchronously control the on / off state of the second switch circuit 401. Specifically, if the first control circuit 20 outputs a 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 loop to conduct for discharging. On the contrary, if the first control circuit 20 outputs a 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 loop to turn off, that is, the second control circuit 40 does not work.

[0163] Specifically, as described above, the first control signal is a low-level signal, and the second control signal is a high-level signal. And, the second switch circuit 401 includes a third switching tube Q3 and a fourth switching tube Q4.

[0164] The control terminal of the third switching tube Q3 is connected to the output terminal of the first control circuit 20, and the output loop of the third switching tube Q3 is connected to the control terminal of the fourth switching tube Q4; the discharge resistor R0 is connected in series to the output loop of the fourth switching tube Q4. That is, the output loop of the fourth switching tube Q4 can be used as the above-mentioned discharge loop.

[0165] The third switching transistor Q3 is configured to: when the first control circuit 20 outputs a first control signal, control the control terminal of the fourth switching transistor Q4 to be at a high level; when the first control circuit 20 outputs a second control signal, control the control terminal of the fourth switching transistor Q4 to be at a low level.

[0166] The fourth switching transistor Q4 is configured to: when the control terminal is at a high level, control the fourth switching transistor Q4 to conduct; when the control terminal is at a low level, control the fourth switching transistor Q4 to turn off.

[0167] In this embodiment, the second switching circuit 401 is still implemented by using a switching transistor; among them, it is relatively complex to implement the discharge loop with PMOS and other devices, so NMOS and other types of devices are used for discharging. That is, the fourth switching transistor Q4 can specifically be an NMOS or NPN-type triode, etc. And because NMOS and the like can only conduct when the control terminal is at a high level, and the first control signal that enables the discharge loop to conduct is at a low level, another switching transistor, that is, the third switching transistor Q3, is also provided for the second switching circuit 401, and the third switching transistor Q3 is used to provide a suitable control level for the fourth switching transistor Q4.

[0168] Specifically, the control terminal of the third switching transistor Q3 is connected to the output terminal of the first control circuit 20. When the first control circuit 20 outputs a first control signal, the third switching transistor Q3 can control whether the output loop of the controller conducts by controlling its own conduction state (for example, turning off), and then control the control terminal of the fourth switching transistor Q4 to be at a high level, so that the fourth switching transistor Q4 can conduct, and the discharge resistor R0 realizes the discharge function through the output loop conducted by the fourth switching transistor Q4.

[0169] When the first control circuit 20 outputs a second control signal, the third switching transistor Q3 can control whether the output loop of the controller conducts by controlling its own conduction state (for example, turning on), and then control the control terminal of the fourth switching transistor Q4 to be at a low level, so that the fourth switching transistor Q4 turns off, and the loop 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.

[0170] Optionally, the third switching transistor Q3 is preferably an NMOS or NPN-type triode, etc., which not only has a low cost but also has a simple circuit structure. Specifically, as Figure 15 shown, in addition to including the third switching transistor Q3 and the fourth switching transistor Q4, the second switching circuit 401 further includes: a tenth resistor R10 and an eleventh resistor R11. The tenth resistor R10 and the eleventh resistor R11 also form voltage-dividing resistors.

[0171] 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 switching transistor Q4. One end of the eleventh resistor R11 is connected to the control terminal of the fourth switching transistor Q4, and the other end of the eleventh resistor R11 is grounded.

[0172] The current input terminal of the third switching transistor Q3 is connected to the control terminal of the fourth switching transistor Q4, and the current output terminal of the third switching transistor Q3 is grounded; one end of the discharge resistor R0 is connected to the output terminal of the protection circuit 30, and the other end of the discharge resistor R0 is connected to the current input terminal of the fourth switching transistor Q4; the current output terminal of the fourth switching transistor Q4 is grounded.

[0173] At this time, the third switching transistor Q3 is configured to: turn off when a first control signal is applied to the control terminal; turn on when a second control signal is applied to the control terminal.

[0174] Specifically, for Figure 15 the second control circuit 40 shown, its working principle is as follows:

[0175] After the power connector 10 is fully plugged into the power supply busbar, the signal pin 12 is powered on. At this time, the detection circuit 201 outputs a low-level detection signal, causing the first switching circuit 202 to output a high-level second control signal. At this time, the protection circuit 30 enables operation; moreover, the high-level second control signal causes the third switching transistor Q3 to turn on, thereby pulling the control terminal of the fourth switching transistor Q4 to a low level, and the fourth switching transistor Q4 turns off, that is, the discharge loop where the discharge resistor R0 is located (which is also the output loop of the fourth switching transistor Q4) is not conducting, and at this time the discharge resistor R0 does not discharge.

[0176] When the power connector 10 is unplugged, the signal pin 12 loses power. At this time, the detection circuit 201 does not work, and the first switching circuit 202 outputs a low-level first control signal, and the protection circuit 30 stops working; moreover, the low-level first control signal causes the third switching transistor Q3 to turn off. In addition, since the node load was powered before, after the protection circuit 30 stops working, its output terminal OUT still remains at a high level for a short time. At this time, under the voltage division of the tenth resistor R10 and the eleventh resistor R11, the control terminal of the fourth switching transistor Q4 is at a high level, and the fourth switching transistor Q4 turns on, causing one end of the discharge resistor R0 to be connected to the output terminal OUT of the protection circuit 30 and the other end to be grounded, and the discharge resistor R0 discharges.

[0177] After the discharge is completed, the output terminal OUT of the protection circuit 30 becomes low level, and the voltage provided by the voltage division of the tenth resistor R10 and the eleventh resistor R11 to the control terminal of the fourth switching transistor Q4 is also low level, which is not sufficient to maintain the conduction of the fourth switching transistor Q4, that is, the fourth switching transistor Q4 turns off, ending the discharge.

[0178] 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 small, and the generated heat is also small, which is not used for discharging; while the resistance value of the discharge resistor R0 is relatively small to enable rapid discharging. That is, the resistance value of the discharge resistor R0 is less than the resistance value of the tenth resistor R10 and / or the eleventh resistor R11; generally, the resistance value of the discharge resistor R0 is at least one order of magnitude smaller than the resistance value of the tenth resistor R10 and / or the eleventh resistor R11. For example, the sum of the resistance values of the tenth resistor R10 and the eleventh resistor R11 is 110 KΩ, and the resistance value of the discharge resistor R0 is 5 KΩ.

[0179] In this embodiment, the control signal generated by the first control circuit 20 synchronously controls the protection circuit 30 and the second control circuit 40 at the rear end, so that when the power connector 10 is unplugged, the second control circuit 40 can timely discharge the output end OUT of the protection circuit 30; and, a simple second control circuit 40 can be formed by using the third switching transistor Q3 and the fourth switching transistor Q4, with low cost.

[0180] In addition, optionally, as described above, if the first control circuit 20 includes a detection circuit 201, the conduction state of the second switching circuit 401 can be controlled based on whether the detection circuit 201 outputs a detection signal. As Figure 16 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 detects that the signal pin 12 is powered; among them, 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.

[0181] And, as Figure 16 shown, the control end of the second switching circuit 401 is connected to the output end of the detection circuit 201 to be able to obtain the detection signal. The second switching circuit 401 is configured to: control the discharge loop to conduct when it does not receive the detection signal; control the discharge loop to turn off when it receives the detection signal.

[0182] In this embodiment, the second control circuit 40 can also be directly controlled by the detection circuit 201. Specifically, when the detection circuit 201 outputs a low-level detection signal because it detects that the signal pin 12 is powered, the second switching circuit 401 can receive this detection signal, and at this time, the second switching circuit 401 controls the discharge loop to turn off, that is, the discharge resistor R0 does not discharge. And when the power connector 10 is unplugged, the detection circuit 201 no longer outputs the detection signal, and at this time, the second switching circuit 401 controls the discharge loop to conduct, so that the discharge resistor R0 starts to discharge.

[0183] Specifically, the detection signal is a low-level signal; as Figure 17 shown, the second switch circuit 401 includes: a fifth switching transistor Q5, a twelfth resistor R12, and a thirteenth resistor R13. Among them, the twelfth resistor R12 and the thirteenth resistor R13 also form voltage-dividing resistors, and their working principle is similar to that of the above-mentioned tenth resistor R10 and eleventh resistor R11, so it will not be elaborated here.

[0184] As Figure 17 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 switching transistor Q5.

[0185] One end of the thirteenth resistor R13 is connected to the control end of the fifth switching transistor 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 switching transistor Q5; the control end of the fifth switching transistor Q5 is connected to the output end of the detection circuit 201, and the current output end of the fifth switching transistor Q5 is grounded.

[0186] In this embodiment, the fifth switching transistor Q5 is similar to the above-mentioned fourth switching transistor Q4, and can also be an NMOS or NPN type triode, and their working principles are similar.

[0187] Specifically, for Figure 17 the second control circuit 40 shown, its working principle is as follows:

[0188] After the power connector 10 is fully inserted into the power supply busbar, the signal pin 12 is powered on. At this time, the detection circuit 201 outputs a low-level detection signal, and the low-level detection signal pulls down the control end of the fifth switching transistor Q5, and the fifth switching transistor Q5 is turned off, that is, the discharge loop where the discharge resistor R0 is located (which is also the output loop of the fifth switching transistor Q5) is not conducting, and at this time, the discharge resistor R0 does not discharge.

[0189] When the power connector 10 is pulled out, the signal pin 12 loses power. At this time, the detection circuit 201 does not work. For example, the second switching transistor 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 powered 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-dividing action of the twelfth resistor R12 and the thirteenth resistor R13, the control end of the fifth switching transistor Q5 is at a high level, and the fifth switching transistor 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 discharges.

[0190] After the discharge ends, the output terminal OUT of the protection circuit 30 becomes low level. At this time, the voltage provided to the control terminal of the fifth switching transistor Q5 is also low level, which is not sufficient to maintain the conduction of the fifth switching transistor Q5, that is, the fifth switching transistor Q5 turns off, and the discharge ends.

[0191] It should be noted that since the output terminal of the detection circuit 201 is also connected to the first switching circuit 202, it is necessary to avoid the first switching circuit 202 affecting the operation of the second switching circuit 401. If the first switching circuit 202 is Figure 17 as shown, the power supply Vin provided by the power supply pin 11 will also affect the level of the control terminal of the fifth switching transistor Q5. In addition, at the moment when the power supply pin 11 is disconnected, the surge current may be transmitted to the node load through the twelfth resistor R12 in the second switching circuit 401. Therefore, an isolation circuit needs to be provided in the second switching circuit 401 at this time to isolate the output terminal OUT of the protection circuit 30 from the power supply pin 11.

[0192] Therefore, the second switching circuit 401 is preferably connected to the output terminal of the first switching circuit 202, and the second switching circuit 401 is controlled by a control signal. Specifically, it can be as Figure 15 shown; since the third switching transistor Q3 is provided, the output terminal OUT of the protection circuit 30 can be isolated from the power supply pin 11, effectively avoiding the node load from being affected by the surge current.

[0193] Based on the same inventive concept, an embodiment of the present invention further provides an electronic node. The electronic node includes any one of the power connection devices described above. By using this power connection device to plug in the power supply busbar 100, power is supplied to node loads such as the processor and hard disk in the electronic node, and it will not be affected by the surge current during hot plugging, enabling safe hot plugging and facilitating the replacement of the electronic node. The electronic node can be a node device that can obtain power through a power connector in a cabinet. For example, the electronic node can be a server node, a switching node, a storage node, etc. This embodiment does not make any limitations in this regard.

[0194] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations should be covered within the protection scope of the present invention.

Claims

1. A power connection device, characterized in that, Comprising: A power connector (10) and a power supply module; the power supply module includes a first control circuit (20) and a protection circuit (30); The power connector (10) includes a power pin (11) and a signal pin (12); in the insertion direction of the power connector (10), 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; 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 first control signal is connected to the control end; control the output end to supply power to the electronic node when the second control signal is connected to the control end.

2. The power connection device according to claim 1, characterized in that, 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); 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 connect to the positive pole of the power supply busbar (100), and the second ground contact (122) is used to connect to the negative pole of the power supply busbar (100); Wherein, in the insertion direction of the power connector (10), the first ground contact (112) is more outward relative to the first power supply contact (111); and / or, in the insertion direction of the power connector (10), the second ground contact (122) is more outward relative to the second power supply contact (121).

3. The power connection device according to claim 2, characterized in that, In the insertion direction of the power connector (10), the first power supply contact (111) is more outward relative to the second ground contact (122).

4. The power connection device according to claim 1, wherein Another 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, wherein, The first control circuit (20) includes 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 it detects that the signal pin (12) is powered; The power supply end of the first switch circuit (202) is connected to the power pin (11), and the output end is connected to the control end of the protection circuit (30); The first switching 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, wherein, The detection signal is a low-level signal; the first switching circuit (202) includes a first switching transistor (Q1); The control terminal of the first switching transistor (Q1) is connected to the output terminal of the detection circuit (201), and the output loop of the first switching transistor (Q1) is connected to the control terminal of the protection circuit (30); The first switching transistor (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 terminal of the first switching 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 switching circuit (202) further includes 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 supply pin (11), and the other end of the first resistor (R1) is connected to the control terminal of the first switching transistor (Q1); One end of the second resistor (R2) is connected to the control terminal of the first switching transistor (Q1), and the other end of the second resistor (R2) is grounded; One end of the third resistor (R3) is connected to the power supply pin (11), and the other end of the third resistor (R3) is connected to the current input terminal of the first switching transistor (Q1); One end of the fourth resistor (R4) is connected to the current input terminal of the first switching transistor (Q1), and the other end of the fourth resistor (R4) is grounded; The current output terminal of the first switching transistor (Q1) is grounded; the current input terminal of the first switching transistor (Q1) is the output terminal of the first switching circuit (202); The first switching transistor (Q1) is configured to: turn on the first switching transistor (Q1) when the detection signal is not received; and turn off the first switching transistor (Q1) when the detection signal is received.

8. The power connection device according to claim 6, characterized in that, The first switching circuit (202) further includes 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 supply pin (11), and the other end of the fifth resistor (R5) is connected to the control terminal of the first switching transistor (Q1); The current input terminal of the first switching transistor (Q1) is connected to the power supply pin (11), and the current output terminal of the first switching transistor (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 terminal of the first switching circuit (202); The first switching transistor (Q1) is configured to: turn off the first switching transistor (Q1) when the detection signal is not received; and turn on the first switching transistor (Q1) when the detection signal is received.

9. The power connection device according to claim 5, characterized in that The detection circuit (201) includes: a second switching transistor (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 terminal of the second switching transistor (Q2); One end of the ninth resistor (R9) is connected to the control terminal of the second switching transistor (Q2), and the other end of the ninth resistor (R9) is grounded; The current input terminal of the second switching transistor (Q2) is connected to the control terminal of the first switching circuit (202), and the current output terminal of the second switching transistor (Q2) is grounded; The second switching transistor (Q2) is configured to: turn off the second switching transistor (Q2) when the signal pin (12) is not powered; turn on the second switching transistor (Q2) when the signal pin (12) is powered.

10. The power connection device according to claim 5, characterized in that, The signal pin (12) includes 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 terminal of the first switching circuit (202).

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

12. The power connection device according to claim 11, wherein The second control circuit (40) includes a second switching circuit (401) and a discharge resistor (R0); The discharge resistor (R0) is connected in series in the discharge loop between the output terminal of the protection circuit (30) and the ground; The second switching circuit (401) is configured to: turn on the discharge loop when the signal pin (12) is not powered; turn off the discharge loop when the signal pin (12) is powered.

13. The power connection device according to claim 12, characterized in that, The control terminal of the second switching circuit (401) is connected to the output terminal of the first control circuit (20); The second switching circuit (401) is configured to: turn on the discharge loop when the first control circuit (20) outputs the first control signal; turn off the discharge loop 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 switching circuit (401) includes a third switching transistor (Q3) and a fourth switching transistor (Q4); The control terminal of the third switching transistor (Q3) is connected to the output terminal of the first control circuit (20), and the output loop of the third switching transistor (Q3) is connected to the control terminal of the fourth switching transistor (Q4); the discharge resistor (R0) is connected in series in the output loop of the fourth switching transistor (Q4); The third switching transistor (Q3) is configured to: when the first control circuit (20) outputs the first control signal, control the control terminal of the fourth switching transistor (Q4) to be at a high level; when the first control circuit (20) outputs the second control signal, control the control terminal of the fourth switching transistor (Q4) to be at a low level; The fourth switching transistor (Q4) is configured to: when the control terminal is at a high level, control the fourth switching transistor (Q4) to conduct; when the control terminal is at a low level, control the fourth switching transistor (Q4) to turn off.

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

16. The power connection device according to claim 13, characterized in that, The first control circuit (20) includes a detection circuit (201); The input terminal of the detection circuit (201) is connected to the signal pin (12), and the detection circuit (201) is configured to: when detecting that the signal pin (12) is powered on, output a corresponding detection signal; wherein, when there is no detection signal, the first control circuit (20) outputs the first control signal, and when there is a detection signal, the first control circuit (20) outputs the second control signal; And, the control terminal of the second switching circuit (401) is connected to the output terminal of the detection circuit (201); The second switching circuit (401) is configured to: when not receiving the detection signal, control the discharge loop to conduct; when receiving the detection signal, control the discharge loop to turn off.

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

18. The power connection device according to claim 1, wherein It further includes a power supply board (50); the power supply module is deployed on the power supply board (50); The power supply board (50) includes a power connection assembly (J1) and a signal connection assembly (J2); The power pin (11) is connected to the power supply module through the power connection assembly (J1), and the signal pin (12) is connected to the power supply module through the signal connection assembly (J2).

19. The power connection device according to claim 18, characterized in that, 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); 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 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).

20. An electronic node, characterized in that, It includes the power connection device according to any one of claims 1 to 19.

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