Power supply device and computer system

Abstract

Embodiments of the present application relate to the technical field of servers, and in particular to a power supply device and a computer system. The power supply device comprises a first contact and a second contact, wherein the first contact is configured to be electrically connected to a conductive interface of a power supply end and the second contact, and the second contact is configured to be electrically connected to the conductive interface of the power supply end and a power interface of a server. The length of the first contact is greater than that of the second contact, so that during insertion of the power supply device into the power supply end, the first contact first makes contact with the conductive interface to increase the voltage of the second contact in advance, and then the second contact starts being connected to the conductive interface to supply power to the server. The power supply device can avoid an electric spark caused by the presence of a voltage difference at the moment when the power supply device is electrically connected to the power supply end, thereby improving the safety and reliability of supplying power to the server.

Description

Power supply device and computer system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on March 26, 2024, with application number 202410349404.5 and application name “A Power Supply Device and Computer System”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of server technology, and in particular to a power supply device and a computer system. Background Art

[0004] Currently, servers are powered by centralized power supply, which involves centrally assembling the server power modules within a power supply enclosure in the center of the cabinet. 220V AC power enters the power supply enclosure, where the power modules convert the 220V AC power into low-voltage DC power, which is then fed to a copper busbar. The servers typically draw power from the busbar. The servers are typically connected to a power supply unit that plugs into the copper busbar to transmit power to the servers.

[0005] However, when the server is plugged in or out of the power supply, the large voltage difference between the copper busbar and the power supply unit can cause sparks at the moment of contact. This can damage the metal coating on the copper busbar and the power supply unit, increase contact resistance, and affect the safety and reliability of the power supply unit. Therefore, existing servers suffer from insufficient safety and reliability. Summary of the Invention

[0006] In a first aspect, an embodiment of the present application provides a power supply device, which includes a first contact and a second contact, the first contact being used to electrically connect a conductive interface of a power supply end and a second contact, the second contact being used to electrically connect the conductive interface of the power supply end and a power interface of a server.

[0007] Among them, the length of the first contact is greater than the length of the second contact, so that when the power supply device is inserted into the power supply end, the first contact first contacts the conductive interface to pre-increase the voltage of the second contact, and then the second contact starts to connect with the conductive interface to power the server.

[0008] In some embodiments, the first contact is elastically extendable, and in the extension direction, the length of the fully extended first contact is greater than the length of the second contact, so that when the power supply device is inserted into the power supply end, the first contact is in an elastically contracted state after abutting against the conductive interface.

[0009] In some embodiments, the first contact and the second contact are arranged in parallel in the extension direction.

[0010] In some embodiments, the power supply device may include a current limiting circuit connected between the first contact and the second contact.

[0011] In some embodiments, the power supply device may include a filtering tank circuit connected to the second contact, and the filtering tank circuit includes a filtering capacitor for storing and filtering the current transmitted to the second contact via the current limiting circuit.

[0012] In some embodiments, the power supply device may include a discharge circuit and a logic control circuit. The discharge circuit includes a discharge switch. The three ends of the discharge switch are respectively connected to the second contact, the logic control circuit and the ground end. The logic control circuit is used to control the switching state of the discharge switch. When the discharge switch is turned on, the current in the filter capacitor is discharged.

[0013] In some embodiments, the length difference between the first contact and the second contact is the quotient of the product of the preset plug-in speed of the power supply device and the current value output by the current limiting circuit, and the product of the capacity value of the filter capacitor and the power supply voltage value of the server.

[0014] In some embodiments, the capacity of the filter capacitor ranges from 5000 μF to 10000 μF, the server power supply voltage is 12V or 54V, the preset plug-in speed ranges from 0.01 m / s to 0.5 m / s, and the current value output by the current limiting circuit ranges from 2 A to 10 A.

[0015] In some embodiments, the length difference ranges from 0.01 m to 0.3 m.

[0016] In some embodiments, the first contact and the second contact both include metal sheets, and the metal sheet of the first contact and the metal sheet of the second contact are used to connect a conductive interface to achieve electrical conduction from the power supply end.

[0017] In some embodiments, the load current value of the first contact is smaller than the load current value of the second contact, and the load current value of the second contact is determined by the power value of the server and the supply voltage value of the server.

[0018] In some embodiments, the power supply device may include a current transmission circuit connected between the second contact and the server power interface. The current transmission circuit includes a current detection circuit and a current switching circuit. The power supply device also includes a logic control circuit.

[0019] The current detection circuit includes a current detection component, which is connected to the logic control circuit to detect the current value of the current transmission circuit and transmit the current value to the logic control circuit.

[0020] The current switching circuit includes a current switching component, which is connected to the logic control circuit.

[0021] The logic control circuit is used to control the switch state of the current switch component according to the current value of the current transmission circuit to change the current transmission state of the current transmission circuit and the server power interface.

[0022] In some embodiments, the current switching component includes a control switch and a field effect transistor, wherein the gate terminal of the field effect transistor is connected to the control switch, and the drain terminal and the source terminal of the field effect transistor are respectively connected to the two ends of the current transmission circuit to adjust the current flow state of the current transmission circuit according to the gate voltage generated by the control switch.

[0023] In some embodiments, the logic control circuit is further used to: in response to the current value of the current transmission circuit being greater than a preset second current threshold and less than a preset first current threshold, reduce the gate voltage generated by the control switch to reduce the current value of the current transmission circuit until the current value of the current transmission circuit is less than the second current threshold; and, in response to the current value of the current transmission circuit being greater than the first current threshold, close the control switch to cut off the current transmission of the current transmission circuit.

[0024] The first current threshold is greater than the second current threshold, and the first current threshold and the second current threshold are multiples of a preset server current threshold.

[0025] In some embodiments, the power supply device further includes a temperature detection circuit for detecting the temperature of the current switch assembly. The temperature detection circuit is connected to the logic control circuit, and the logic control circuit is further configured to, in response to temperature data transmitted by the temperature detection circuit being greater than a preset temperature threshold, turn off the current switch assembly to cut off current transmission in the current transmission circuit.

[0026] In a second aspect, embodiments of the present application provide a computer system comprising: a power supply, a server, and a power supply device. The power supply device is the power supply device described in any embodiment of the first aspect of the present application, and is configured to electrically connect the power supply to a power interface of the server to power the server.

[0027] In some embodiments, the conductive interface of the power supply end is a copper busbar, which is used to transmit direct current. The power interface of the server is a power supply interface. The power supply device is used to connect the copper busbar and the power supply interface to realize power supply of the server.

[0028] In some embodiments, the computer system includes multiple power supply devices. The multiple power supply devices are used to connect to a server and a power supply terminal to form a parallel circuit to power the server. The operating power of the server is greater than the rated power of any one of the power supply devices, and the total rated power of the multiple power supply devices is greater than the operating power of the server.

[0029] In some embodiments, the plurality of power supplies includes a redundant power supply.

[0030] In some embodiments, any two power supply devices among the plurality of power supply devices have the same size specifications and circuit design.

[0031] In some embodiments, the rated current of the current limiting circuit of each of the plurality of power supply devices is proportional to the number of the power supply devices.

[0032] In some embodiments, the server includes a control circuit, and each of the multiple power supply devices is connected to the control circuit of the server, so that the control circuit of the server obtains circuit parameters of each power supply device, wherein the circuit parameters include the current value and / or temperature data of the current transmission circuit.

[0033] In some embodiments, the control circuit of the server is used to: in response to the current values ​​of the current transmission circuits of all power supply devices in the system being greater than a preset current threshold, control the current switching components of all power supply devices to cut off current transmission.

[0034] In some embodiments, the control circuit of the server is used to: in response to the temperature data being higher than a preset temperature threshold, control the current switch components of all power supply devices to cut off current transmission.

[0035] In a third aspect, an embodiment of the present application provides a method for installing a server, the method comprising:

[0036] Electrically connecting the power supply device in any embodiment of the first aspect of the present application to a power interface of the server; and

[0037] Insert the first contact of the power supply device into the power supply end at a preset speed.

[0038] Among them, the preset speed is less than the quotient of a first value and a second value, wherein the first value is the product of the current value output by the current limiting circuit and the length difference between the first contact and the second contact in the extension direction, and the second value is the product of the filter capacitor capacity value in the filter energy storage circuit and the power supply voltage value of the server. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a diagram of an application environment of a power supply device according to one or more embodiments;

[0040] FIG2 is a circuit structure block diagram of a power supply device, a power supply terminal, and a server according to one or more embodiments;

[0041] FIG3 is a schematic diagram of the structure of the power supply device before being inserted into the power supply end according to one or more embodiments;

[0042] FIG4 is a schematic diagram of the structure of a power supply device after being inserted into a power supply end according to one or more embodiments;

[0043] FIG5 is a schematic diagram of a top view of a conductive interface and a power supply device (partial schematic diagram) of a power supply end according to one or more embodiments;

[0044] FIG6 is a circuit structure block diagram of a power supply device according to one or more embodiments;

[0045] FIG7 is a block diagram of another circuit structure related to a power supply device according to one or more embodiments;

[0046] FIG8 is a schematic diagram of a circuit structure of a power supply device according to one or more embodiments;

[0047] FIG9 is a structural block diagram of a computer system according to one or more embodiments;

[0048] FIG10 is a schematic diagram of a circuit structure in which multiple power supply devices are connected to a server according to one or more embodiments;

[0049] FIG11 is a structural block diagram of a server according to one or more embodiments. DETAILED DESCRIPTION

[0050] In order to make the technical solutions and advantages of this application more clearly understood, the following is a further detailed description of the embodiments and related technical contents of this application in conjunction with the accompanying drawings and text descriptions. It should be understood that the embodiments described below are only used to explain the technical solutions of the embodiments of this application and are not intended to limit the more possible implementations of this application.

[0051] It should be noted that relational terms such as "first" and "second" appearing herein are used solely to distinguish between things, states, or actions and do not necessarily indicate or imply relative importance or a sequential relationship. The terms "include," "comprise," or any other variations thereof are used to indicate non-exclusive inclusion, and the objects included are not limited to the objects listed herein. The term "plurality" or any other variations thereof is used to indicate that the number of objects is two or more.

[0052] In a first aspect, embodiments of the present application provide a power supply device. This device can be used in an application environment as shown in Figure 1. This application environment can be a centralized power supply server cabinet. A power supply device 101 is electrically connected to a server 102 and a power supply terminal 103, respectively, to transmit current from the power supply terminal 103 to the server 102, thereby providing power to the server 102.

[0053] Among them, the server 102 can be implemented as an independent server or a server cluster composed of multiple servers. The server 102 can be a server with a PSU (PC Power supply unit) power interface. In this application environment, the server adopts a centralized power supply method for power supply. The power supply end 103 is used to convert 220V AC power into low-voltage DC power. Specifically, a power frame can be provided in the power supply end 103. After the power module inside the power frame performs AC-to-DC conversion, the DC power is output through the conductive interface of the power supply end 103. Among them, the conductive interface of the power supply end 103 can be a copper busbar. The power supply device 101 is plugged into the copper busbar to obtain power to power the server 102.

[0054] 1 and 2 , the power supply device 101 includes a first contact 201 and a second contact 202. The first contact 201 and the second contact 202 are described below.

[0055] The first contact 201 is used to electrically connect the conductive interface of the power supply end 103 and the second contact 202 . The second contact 202 is used to electrically connect the conductive interface of the power supply end 103 and the power interface of the server 102 .

[0056] Among them, the length of the first contact 201 is greater than the length of the second contact 202, so that when the power supply device 101 is inserted into the power supply end 103, the first contact 201 first contacts the conductive interface to pre-increase the voltage of the second contact 202, and then the second contact 202 starts to connect with the conductive interface to power the server 102.

[0057] In some specific embodiments, before the power supply device 101 is inserted into the power supply end 103, the state relationship between the first contact 201 and the second contact 202 and the power supply end 103 is shown in Figure 3. Before the power supply device 101 is inserted, the length of the first contact 201 is greater than the length of the second contact 202, and the length difference is L. After the power supply device 101 is inserted into the power supply device 101, the first contact 201 first contacts the conductive interface of the power supply end 103, and introduces current to the second contact 202 through the first contact 201 to increase the voltage of the second contact 202. As the power supply device 101 continues to be inserted, the second contact 202 is connected to the conductive interface of the power supply end 103. At this time, the power supply device 101 is inserted completely, and the state when the insertion is completed is shown in Figure 4. In some cases, when the power supply device 101 is inserted, the ends of the first contact and the second contact remain flush.

[0058] The first contact 201 is used to continuously increase the voltage of the second contact 202 from 0V to the rated voltage value of the power supply end (eg, 12V or 54V) before the second contact 202 is inserted into the power supply end 103 .

[0059] In some embodiments, the first contact can be elastically extended and retracted, and in the extension direction, the length of the fully extended first contact 201 is greater than the length of the second contact 202, so that when the power supply device 101 is inserted into the power supply end 103, the first contact 201 is in an elastically contracted state after abutting against the conductive interface.

[0060] Specifically, the first contact 201 in Figure 3 can be in a fully extended state. During the process of inserting the power supply device 101 into the power supply end 103, the first contact 201 contacts the conductive interface of the power supply end 103 and begins to be in a compressed state. As the power supply device 101 continues to be inserted, the first contact 201 is continuously compressed.

[0061] For example, the end of the first contact 201 facing the extension direction may be inelastic, and the end of the first contact 201 facing the compression direction may be provided with an elastic member, such as a spring, to achieve elastic expansion and contraction. The first contact 201 may also be made of an elastically expandable material except for the portion (e.g., the plug portion) for inserting into the power supply terminal 103. Specifically, there are no excessive restrictions on how the first contact 201 can achieve elastic expansion and contraction, and those skilled in the art can configure it according to actual needs.

[0062] In some specific embodiments, a schematic diagram of a top view of the conductive interface 510 of the power supply terminal 103 and the power supply device 101 (a portion of the power supply device 101 is shown) is shown in Figure 5. The conductive interface 510 can be a copper busbar, including a positive copper busbar 511 and a negative copper busbar 512, respectively. The first contact 201 and the second contact 202 of the power supply device 101 can be power clips with positive and negative poles, respectively. The first contact 201 and the second contact 202 each include a plug-in portion (521 and 531) for inserting into the conductive interface 510, a retaining portion (522 and 532), and a current extraction portion (523 and 533). Among them, the plug-in part 521 and the plug-in part 531 both include a metal structure for conduction, such as a copper sheet, and the limiting part 522 and the limiting part 532 are used to limit the depth of the contact inserted into the conductive interface 510. In the insertion direction perpendicular to the conductive interface of the power supply device inserted into the power supply end, the outer diameter of the limiting part 522 and the limiting part 532 are both larger than the outer diameter of the edge of the conductive interface of the power supply end.

[0063] The first contact 201 and the second contact 202 in FIG5 are arranged vertically in a plan view. That is, when the power supply device 101 is inserted into the power supply terminal 103, the first contact 201 is plugged into the lower portion of the copper busbar of the conductive interface 510, and the second contact 202 is plugged into the upper portion of the copper busbar of the conductive interface 210. The specific vertical positional relationship between the first contact 201 and the second contact 202 can be changed, and the first contact 201 can also be plugged into the upper portion of the copper busbar of the conductive interface 510, and the second contact 202 can be plugged into the lower portion of the copper busbar of the conductive interface 210.

[0064] During the insertion of the power supply device 101 into the conductive interface 510 of the power supply terminal 103, the plug-in portion 521 of the first contact 201 is inserted into the conductive interface 510 before the second contact 202. The plug-in portion 521 abuts the positive and negative copper bars of the conductive interface 510, and the stop portion 522 engages with the edge of the conductive interface 510, resting against the edge of the conductive interface 510. As the power supply device 101 continues to be inserted into the power supply terminal 103, the first contact 201 is compressed, and the plug-in portion 531 of the second contact 202 begins to insert into the conductive interface 510, abutting the positive and negative copper bars of the conductive interface 510. Subsequently, the stop portion 532 of the second contact 202 abuts with the edge of the conductive interface 510, resting against the edge of the conductive interface 510. When the power supply device 101 is fully inserted into the power supply end 103 , the limiting portions of the first contact 201 and the second contact 202 both abut against the edge of the conductive interface 510 .

[0065] The power supply device 101 can achieve that during the process of inserting the power supply end 103, the first contact 201 contacts the power supply end 103 before the second contact 202, and the first contact 201 contacts the power supply end 103 to transmit current to the second contact 202 position to pre-increase the voltage of the second contact 202, and as the power supply device continues to be inserted, the voltage value at the second contact 202 position approaches or is equal to the positive pole voltage value of the power supply end 103. At the moment when the second contact 202 is inserted into the power supply end 103 to turn on the circuit, there will be no electric spark caused by the instantaneous large voltage difference, thereby improving the safety and reliability of power supply to the server 102.

[0066] At the same time, the power supply device 101 can use a centralized power supply method to power the server 102, which can improve the power conversion efficiency without modifying the interface of the server 102, and also enhance the flexibility of the deployment of the server 102.

[0067] In some embodiments, the first contact 201 and the second contact 202 are arranged in parallel in the extension direction.

[0068] The parallel arrangement of the first contact 201 and the second contact 202 can ensure smooth plugging of the power supply device 101 into the power supply end 103 , thereby improving the user's plugging experience.

[0069] As shown in FIG. 6 , in some embodiments, the power supply device further includes a current limiting circuit 203 , which is connected between the first contact 201 and the second contact 202 .

[0070] The current limiting circuit 203 may include a current limiting device for limiting the current drawn from the power supply end 103 by the first contact 201 . Specifically, the current limiting device may be a high-power cement resistor or other current limiting devices.

[0071] In some specific embodiments, the current value of the current limiting circuit 203 may be in the range of 2A to 3A. Accordingly, those skilled in the art may determine the resistance value of the current limiting device based on the current value range and the voltage value of the power supply terminal. For example, when the voltage value of the power supply terminal is 54V and the current value is 2A, the resistance value of the current limiting device may be 27Ω.

[0072] In some embodiments, as shown in FIG6 , the power supply device 101 further includes a filtering tank circuit 204 , and the filtering tank circuit 204 is electrically connected to the second contact 202 .

[0073] The filter tank circuit 204 may include a filter energy storage device, such as a filter capacitor, for storing and filtering the current transmitted to the second contact 202 via the current limiting circuit 203. Filter capacitors are commonly used in power rectifier circuits to filter out AC components and smooth the output DC. The filter capacitor may be a polarized capacitor, also known as an electrolytic capacitor, which is a capacitor with polarity, having a positive and negative pole.

[0074] The first contact 201 is used to input current into the filter tank circuit 204 through the current limiting circuit 203 before the second contact 202 is inserted into the power supply terminal 103, thereby continuously increasing the voltage of the filter tank circuit 204 from 0V to the rated voltage value of the power supply terminal (for example, 12V or 54V).

[0075] During the process of inserting the power supply device 101 into the power supply terminal 103, the first contact 201 contacts the power supply terminal 103 before the second contact 202, and transmits the current drawn by the first contact 201 to the filter tank circuit 204. Due to the action of the current limiting circuit 203, the current value transmitted to the filter tank circuit 204 will not be too large, thereby avoiding the situation where the first contact 201 is inserted into the power supply terminal 103 and transmits current to the filter tank circuit 204, causing electric sparks.

[0076] In some embodiments, as shown in FIG7 , the power supply device 101 further includes a leakage circuit (not shown in FIG7 ) and a logic control circuit 703. The leakage circuit includes a leakage switch, the three terminals of which are respectively connected to the second contact 202, the logic control circuit 703, and the ground terminal.

[0077] The logic control circuit 703 is used to control the switching state of the discharge switch, and when the discharge switch is turned on, the current in the filter capacitor is discharged.

[0078] By adding a discharge circuit for the filter capacitor in the power supply device 101 , the voltage level in the filter capacitor can be quickly discharged after the server 102 is unloaded.

[0079] In some specific embodiments, the logic control circuit controls the connection of the leakage circuit switch according to the voltage signal of the first contact 201. Specifically, when it is detected that the voltage of the first contact 201 is 0, the switch of the leakage circuit is controlled to be connected to discharge the current in the filter capacitor.

[0080] In some embodiments, the leakage switch of the leakage circuit is controlled by the enable signal of the first contact, and an isolation conversion device is provided between the current limiting circuit 203 and the leakage circuit and the leakage switch. When the first contact contacts the conductive interface of the power supply terminal 103, the enable signal of the first contact is high. After passing through the isolation conversion device, the enable signal is converted to a low level. The drive of the leakage switch is in the closed state, and the ground terminal is not connected. When the first contact is separated from the conductive interface of the power supply terminal 103, the enable signal of the first contact is low. After passing through the isolation conversion device, the drive control of the leakage switch is to open, and the leakage circuit connects the channel between the positive electrode of the filter capacitor and the ground terminal. The level in the filter capacitor gradually decreases, thereby realizing the discharge of the current of the filter capacitor.

[0081] In some embodiments, the length difference between the first contact 201 and the second contact 202 is the quotient of the product of the preset plug-in speed of the power supply device 101 and the current value output by the current limiting circuit 203 and the product of the capacity value of the filter capacitor and the power supply voltage value of the server 102.

[0082] Specifically, the length difference is represented by L, the capacity value of the filter capacitor is represented by C, the power supply voltage value of the server 102 is represented by U, the preset plug-in speed of the power supply device 101 is represented by V, and the current value output by the current limiting circuit 203 is represented by I. Accordingly, the length difference between the first contact 201 and the second contact 202 in the extension direction can be represented by the following formula: L=VI / CU.

[0083] In some embodiments, the capacity of the filter capacitor ranges from 5000 μF (microfarads) to 10000 μF, the power supply voltage of the server 102 is 12V (volts) or 54V, the preset plug-in speed ranges from 0.01 m / s (meters / second) to 0.5 m / s, and the current value output by the current limiting circuit 203 ranges from 2A (amperes) to 10A.

[0084] For example, the capacity of the filter capacitor C = 10000uf, i.e. 0.01F, the power supply voltage of the server 102 U = 54V, the current value output by the current limiting circuit 203 = 2A, and the preset plug-in speed V = 0.05m / s, the length difference L = 0.185m.

[0085] For example, the capacity of the filter capacitor C = 10000uF, ie 0.01F, the power supply voltage of the server 102 U = 54V, the current value output by the current limiting circuit 203 = 6A, and when the preset plug-in speed V is 0.03m / s, the length difference L = 0.333m.

[0086] For example, the capacity of the filter capacitor C = 5000uF, ie 0.005F, the power supply voltage of the server 102 U = 54V, the current value output by the current limiting circuit 203 = 2A, and when the preset plug-in speed V is 0.03m / s, the length difference L = 0.222m.

[0087] For example, the capacity of the filter capacitor C = 5000uF, ie 0.005F, the power supply voltage of the server 102 U = 54V, the current value output by the current limiting circuit 203 = 5A, and when the preset plug-in speed V is 0.02m / s, the length difference L = 0.37m.

[0088] In some embodiments, the length difference ranges from 0.01 m to 0.30 m.

[0089] In some embodiments, the first contact 201 and the second contact 202 shown in FIG. 2 both include metal sheets. The metal sheet of the first contact 201 is used to connect to the conductive interface, and the metal sheet of the second contact 202 is used to connect to the conductive interface to achieve electrical conduction from the power supply end 103 .

[0090] In some specific embodiments, the metal sheets of the first contact 201 and the second contact 202 are copper sheets. In some cases, the number of copper sheets in the first contact 201 is less than the number of copper sheets in the second contact 202. Regarding the specific material and number of the metal sheets of the first contact 201 and the second contact 202, those skilled in the art can set them according to actual needs.

[0091] In some embodiments, the load current value of the first contact 201 is smaller than the load current value of the second contact 202 , and the load current value of the second contact 202 is determined by the power value of the server 102 and the supply voltage value of the server 102 .

[0092] The load current value refers to the maximum current that can be carried.

[0093] In some specific implementations, the load current value of the first contact 201 may be the rated current value of the components in the filter tank circuit 204 , for example, 20A.

[0094] The load current value of the second contact 202 may be the maximum load current value of the server 102 . For example, when the rated power of the server 102 is 2400 W and the rated voltage is 12 V, the load current value of the second contact 202 may be 200 A.

[0095] In some embodiments, as shown in FIG. 7 , the power supply device 101 may further include a current transmission circuit 205 , wherein the current transmission circuit 205 is connected between the second contact 202 and a power interface of the server 102 .

[0096] The current transmission circuit 205 includes a current detection circuit 701 and a current switching circuit 702. The power supply device 101 further includes a logic control circuit 703.

[0097] The current detection circuit 701 includes a current detection component, which is connected to the logic control circuit 703 to detect the current value of the current transmission circuit 205 and transmit the current value to the logic control circuit 703 .

[0098] The current switching circuit 702 includes a current switching component, which is connected to the logic control circuit 703 .

[0099] The logic control circuit 703 is used to control the switch state of the current switch component according to the current value of the current transmission circuit 205 to change the current transmission state of the power interface between the current transmission circuit 205 and the server 102.

[0100] The current detection component can be a shunt resistor, a Hall current sensor, or other components for detecting current.

[0101] In some embodiments, the current switching component includes a control switch and a field effect transistor, wherein the gate terminal of the field effect transistor is connected to the control switch, and the drain terminal and the source terminal of the field effect transistor are respectively connected to the two ends of the current transmission circuit 205 to adjust the current flow state of the current transmission circuit 205 according to the gate voltage generated by the control switch.

[0102] Specifically, the field-effect transistor can be an N-channel MOS transistor (a Metal-Oxide-Semiconductor Field-Effect Transistor). The control switch can be a charge pump. The output of the charge pump is connected to the gate of the MOS transistor. By controlling the output voltage of the charge pump, the current conduction at the drain and source ends of the MOS transistor can be controlled.

[0103] In some embodiments, the logic control circuit 703 is also used to reduce the gate voltage generated by the control switch when the current value of the current transmission circuit is greater than a preset second current threshold and less than a preset first current threshold, so as to reduce the current value of the current transmission circuit until the current value of the current transmission circuit is less than the second current threshold.

[0104] The logic control circuit 703 is further configured to turn off the control switch to cut off the current transmission of the current transmission circuit 205 when the current value of the current transmission circuit is greater than the first current threshold.

[0105] The first current threshold is greater than the second current threshold, and the first current threshold and the second current threshold are multiples of a preset server current threshold.

[0106] The preset server current threshold may be the rated input current of the server 102 .

[0107] In some specific embodiments, the first current threshold may be 1.5 times the preset server current threshold, and the second current threshold may be 1.1 times, 1.2 times, or 1.3 times the preset server current threshold. The specific relationship between the second current threshold and the preset server current threshold can be designed based on the heat dissipation capability of the current transmission circuit 205 and the current flow capability of the switch component in the current switching circuit 702, and is not specifically limited here.

[0108] The current detection component is used to monitor the current size transmitted in the current transmission circuit 205. When the current is abnormal (short circuit or overcurrent fault occurs), the current transmission can be cut off through the control switch in the current switching circuit 702, thereby protecting the server 102 and improving the safety and reliability of the power supply process for the server 102.

[0109] In some embodiments, the power supply device 101 further includes a temperature detection circuit for detecting the temperature of the current switch component.

[0110] The temperature detection circuit is connected to the logic control circuit 703 , and the logic control circuit 703 is further configured to control the switching state of the current switch component according to the temperature data transmitted by the temperature detection circuit.

[0111] In some embodiments, the logic control circuit 703 is further configured to turn off the current switch component to cut off current transmission of the current transmission circuit when the temperature data is greater than a preset temperature threshold.

[0112] Specifically, the temperature detection circuit may include a thermistor, a thermocouple, or other types of temperature sensors. A person skilled in the art may set the preset temperature threshold based on the actual conditions of the power board components in the power supply device 101. In some specific embodiments, the preset temperature threshold may be set to 105 degrees Celsius.

[0113] By feeding back the temperature value of the current switch component detected by the temperature detection circuit to the logic control circuit, when the temperature is greater than the preset temperature threshold, the current switch component is promptly closed to cut off the current transmission. In the event that the power supply device 101 has uneven heat dissipation, causing the switching device to heat abnormally, the circuit can be shut down in time, thereby improving the safety of the power supply device 101 supplying power to the server 102.

[0114] In some specific implementations, the circuit structure of the power supply device 101 may be as shown in FIG8 , which involves the first contact 201, the second contact 202, the current limiting circuit 203, the filtering tank circuit 204, the current leakage circuit, the current detection circuit 701, the current switching circuit 702, the logic control circuit 703, and the temperature detection circuit in FIG2 , FIG6 , and FIG7 .

[0115] Specifically, the current limiting circuit 203 includes a resistor R1, the filter energy storage circuit 204 may include filter capacitors C1 and C2, the number of filter capacitors can be determined according to demand, the leakage circuit may include a switch SW1 and a resistor R2, the current detection circuit 701 may include a current detection unit (resistor R3 and operational amplifier O1), the current switching circuit 702 may include field effect transistors Q1, Q2 and a charge pump CP1, and the temperature detection circuit may include a temperature sensor TE1 and an operational amplifier O2.

[0116] The first contact is connected to one end of the resistor R1 of the current limiting circuit, the other end of R1 is connected to the first end (positive end) of the filter capacitors C1 and C2, and the second contact is connected to the first end (positive end) of the filter capacitor C1 and the first end (positive end) of the filter capacitor C2. The negative terminals of the filter capacitors C1 and C2 are both grounded. The filter capacitors C1 and C2 are connected in parallel with the current transmission circuit. The first end of C1 and the first end of C2 are both connected to the first end of the switch SW1 of the discharge circuit, and the other end of the switch SW1 is connected to the logic control circuit. The other end of the switch SW1 is connected to a grounded resistor R2, which is used to limit the current of the discharge circuit. The current transmission circuit includes a current detection circuit and a current switching circuit. The resistor R3 in the current detection circuit is connected to the operational amplifier O1, and the other end of the operational amplifier O1 is connected to the logic control circuit. The input end of resistor R3 is connected to filter capacitor C2 and the first end of filter capacitor C2. The output end of resistor R3 is connected to the current switching circuit. Specifically, the output end of resistor R3 is connected to the drain ends of field-effect transistors Q1 and Q2 of the current switching circuit. The source ends of field-effect transistors Q1 and Q2 are connected to the server power interface. Field-effect transistors Q1 and Q2 are connected in parallel, and the drain ends of field-effect transistors Q1 and Q2 are connected to the first end of charge pump CP1. The second end of charge pump CP1 is connected to the logic control circuit. The third end of charge pump CP1 is grounded. Temperature sensor TE1 of the temperature detection circuit is connected to operational amplifier O2, and the other end of operational amplifier O2 is connected to the logic control circuit.

[0117] In some embodiments, the power supply device 101 includes a power board, and components of the current limiting circuit 203, the filtering energy storage circuit 204 and the current transmission circuit 205 are arranged on the power board. The first contact 201 is connected to the current limiting circuit 203 and the current transmission circuit 205 by welding or cable connection, and the second contact 202 is connected to the current transmission circuit 205 by welding or cable connection.

[0118] In some specific embodiments, the power board includes copper foil for transmitting current between components of various circuits on the power board. The power board also includes gold finger contacts, and the current transmission circuit 205 is connected to the power interface of the server 102 through the gold finger contacts to provide power to the server 102.

[0119] Those skilled in the art will understand that the structures shown in Figures 2, 6 and 7 are merely block diagrams of partial structures related to the embodiment scheme of the present application, and do not constitute a limitation on the power supply device to which the embodiment scheme of the present application is applied. The specific power supply device may include more or fewer components than shown in the figures, or combine certain components, or have a different arrangement of components.

[0120] In a second aspect, an embodiment of the present application provides a computer system. As shown in FIG9 , the computer system 900 may include a power supply 901, a server 903, and a power supply device 902, wherein:

[0121] The power supply end 901 is used to provide power, and the power supply device 902 is used to electrically connect the power supply end 901 and the power interface of the server 903 to realize power supply to the server 903, wherein the power supply device 902 is the power supply device disclosed in any embodiment of the first aspect.

[0122] In some embodiments, the conductive interface of the power supply end 901 is a copper busbar, which is used to transmit direct current; the power interface of the server 903 is a power supply interface; the power supply device 902 is used to connect the copper busbar and the power supply interface to realize power supply of the server 903.

[0123] By electrically connecting the power supply device 902 to the server 903 and the power supply end 901, during the process of inserting the power supply device 902 into the power supply end 901, the first contact contacts the power supply end 901 before the second contact. The first contact contacts the power supply end 901 to transmit current to the second contact position to pre-increase the voltage of the second contact. As the power supply device 902 continues to be inserted, the voltage value at the second contact position approaches or is equal to the positive voltage value of the power supply end 901. Therefore, at the moment when the second contact is inserted into the power supply end 103 to turn on the circuit, there will be no electric spark caused by the instantaneous large voltage difference, thereby improving the safety and reliability of power supply to the server 903.

[0124] At the same time, the power supply device 902 can use a centralized power supply method to power the server 903, which can improve the power conversion efficiency without modifying the interface of the server 903. The absence of the need to modify the interface of the server 903 also enhances the flexibility of the deployment of the server 903.

[0125] In some embodiments, the computer system includes multiple power supply devices, which are used to connect the server and the power supply end to form a parallel circuit to power the server.

[0126] The operating power of the server is greater than the rated power of any power supply device, and the total rated power of the multiple power supply devices is greater than the operating power of the server.

[0127] As the computing performance of servers gradually increases, the operating power of servers becomes larger and larger. When the operating power of a server is greater than the rated power of one power supply device, multiple power supply devices need to be configured for the server so that the total rated power of the multiple power supply devices is greater than the server operating power to ensure the normal operation of the server.

[0128] In some embodiments, the plurality of power supplies includes a redundant power supply.

[0129] In the related art, when a server is powered by a PSU power supply, if the server needs to be powered by N PSU power supplies, since each PSU power supply needs to convert the incoming AC power into DC, and each PSU power supply has the ability to increase the output voltage and balance the current, any failure of any PSU power supply will affect the normal operation of the server. Therefore, in order to ensure the reliability of the PSU power supply, N redundant PSU power supplies are usually required, so the power supply cost is relatively high.

[0130] In this embodiment, since the power supply device is powered by a centralized power supply method, the power supply device used for centralized power supply does not have the ability to actively raise the output voltage. Only one redundant power supply device can be configured. When any power supply device fails, the redundant power supply device can replace its work to ensure the stable operation of the server.

[0131] In some embodiments, any two power supply devices among the plurality of power supply devices have the same size specifications and circuit design.

[0132] In some specific embodiments, the sizes and electrical specifications of the first contacts of any two power supply devices among the multiple power supply devices are the same, the sizes and electrical specifications of the second contacts of any two power supply devices are the same, and the circuit components and circuit designs in the power boards of any two power supply devices are the same.

[0133] Therefore, during the development and design process of the power supply device, only one power supply device with the same size specifications and circuit design needs to be developed, which can reduce development costs. At the same time, since the multiple power supply devices connected to the server are completely consistent, blind plugging is also convenient.

[0134] In some embodiments, the power supply device may be designed differently based on the position differences between the server power interfaces and the different heat dissipation environments to improve the performance and operational stability of the power supply device.

[0135] In some embodiments, the rated current of the current limiting circuit of each of the plurality of power supply devices is proportional to the number of the power supply devices.

[0136] Although the length of the first contacts of any two power supply devices among multiple power supply devices is the same, in actual products, there may be slight differences in the installation gaps between different power supply devices, resulting in differences in the order in which the first contacts contact the conductive interface of the power supply end when a server connected to multiple power supply devices is plugged into the power supply end. Since a parallel circuit is formed between the power supply devices to power the server, at this time, the first contact that first contacts the conductive interface of the power supply end needs to introduce current into the filter energy storage circuits in all power supply devices. Therefore, the rated current of the current limiting circuit of each power supply device in the multiple power supply devices must be able to load the total capacitance value of multiple filter energy storage circuits, that is, the rated current of the current limiting circuit must be proportional to the number of power supply devices.

[0137] In some specific implementations, when the server is connected to one power supply device, the rated current output by the current limiting circuit of the power supply device is 3A. Then, when the server is connected to five power supplies, the rated current of the current limiting circuit of each power supply device is 15A.

[0138] In some embodiments, the rated power of the current limiting resistor of the current limiting circuit of each of the plurality of power supply devices is proportional to the number of the power supply devices.

[0139] This can avoid the situation where the actual current of the current limiting circuit corresponding to the first contact that makes priority contact is forcibly increased at the moment when one of the first contacts in multiple power supply devices contacts the conductive interface of the power supply end before other first contacts, thereby causing the current limiting resistor to burn out.

[0140] In some embodiments, the enable signal of the leakage circuit of each of the multiple power supply devices is connected to the first contact of the power board.

[0141] In some embodiments, the server includes a control circuit, and each of the multiple power supply devices is connected to the control circuit of the server, so that the control circuit of the server obtains circuit parameters of each power supply device, wherein the circuit parameters include the current value and / or temperature data of the current transmission circuit.

[0142] In some embodiments, the current detection circuit of each of the multiple power supply devices may be connected in parallel via pins of a gold finger connector of the server.

[0143] In some specific implementations, a specific structure of multiple power supply devices electrically connected to a server is shown in Figure 10. In the figure, two power supply devices (A, B) electrically connected to a server C are taken as an example.

[0144] The circuit structures of power supply devices A and B are the same. Both power supply devices A and B include a first contact, a second contact, a current limiting circuit resistor R1, a filter capacitor C1 and a filter capacitor C2, a switch SW1 of the leakage circuit, a resistor R2 of the leakage circuit, a resistor R3 in the current detection circuit, an operational amplifier O1 in the current detection circuit, a field-effect transistor Q1 in the current switching circuit, a field-effect transistor Q2 in the current switching circuit, a charge pump CP1 in the current switching circuit, and a temperature sensor TE1 and an operational amplifier O2 in the temperature detection circuit.

[0145] Since the circuit component design and component connection relationship of power supply device A and power supply device B are the same, power supply device A is used as an example for explanation. In power supply device A, the first contact is connected to one end of the resistor R1 of the current limiting circuit, the other end of R1 is connected to the first end (positive end) of the filter capacitors C1 and C2, and the second contact is connected to the first end (positive end) of the filter capacitor C1 and the first end (positive end) of the filter capacitor C2. The negative ends of the filter capacitors C1 and C2 are both grounded. The filter capacitors C1 and C2 are connected in parallel with the current transmission circuit. The first end of C1 and the first end of C2 are both connected to the first end of the switch SW1 of the discharge circuit, and the other end of the switch SW1 is connected to the logic control circuit. The other end of the switch SW1 is connected to a grounded resistor R2, which is used to limit the current of the discharge circuit. The current transmission circuit includes a current detection circuit and a current switching circuit. Resistor R3 in the current detection circuit is connected to operational amplifier O1, the other end of which is connected to the logic control circuit. Operational amplifier O1 is also connected to the server power interface. The input end of resistor R3 is connected to filter capacitor C2 and the first end of filter capacitor C2, and the output end of resistor R3 is connected to the current switching circuit. Specifically, the output end of resistor R3 is connected to the drain ends of field-effect transistors Q1 and Q2 in the current switching circuit, the source ends of field-effect transistors Q1 and Q2 are connected to the server power interface, field-effect transistors Q1 and Q2 are connected in parallel, and the drain ends of field-effect transistors Q1 and Q2 are connected to the first end of charge pump CP1, the second end of charge pump CP1 is connected to the logic control circuit, and the third end of charge pump CP1 is grounded. Temperature sensor TE1 in the temperature detection circuit is connected to operational amplifier O2, the other end of which is connected to the logic control circuit.

[0146] The circuit structure within server C shown in Figure 10 can be that of a server motherboard. Server C includes multiple sub-servers, each of which includes a filter capacitor. The current transmission circuits of power supply devices A and B are electrically connected to the power interface of each sub-server. The power interface can be a server's gold finger connector. Accordingly, the electrical connection between the current transmission circuit and the server power interface can be connected to the pins of the gold finger connector, forming a parallel circuit to power the server. Power supply devices A and B are connected to different gold finger connector pins, respectively. The power interface of each sub-server is also connected to the filter capacitor of each sub-server, forming a voltage bus within server C. The control circuit of server C is connected to the logic control circuits of power supply devices A and B.

[0147] The power supply's current transmission path is connected to the server's filter capacitor and voltage busbar. Multiple power supply paths are connected in parallel. The power supply's logic control circuit is connected to the server's control circuit, enabling communication signals between them.

[0148] In some specific embodiments, the current signal collected by the current detection circuit can be a level signal. When multiple power supply devices are connected in parallel, the current flow signal forms a current bus. The level signal of the current bus is actually the average current of the multiple power supply devices. The current detection circuit or logic control circuit of any power supply device can determine whether the current of the current transmission circuit of the power supply device exceeds the average value based on the bus level, indicating that a current anomaly exists.

[0149] In some embodiments, the control circuit of the server is used to: when the current values ​​of the current transmission circuits of all power supply devices in the system are greater than a preset current threshold, or when the temperature data are higher than a preset temperature threshold, control the current switching components of all power supply devices to cut off current transmission.

[0150] The control circuit of the server is connected to the logic control circuit of the power supply device, and can monitor the current value and temperature data of the current transmission circuit of each power supply device. When the current value of all power supply devices is greater than the preset current threshold or the temperature value is greater than the preset temperature threshold, the current switch components of all power supply devices are controlled to cut off the current transmission of the current transmission circuit.

[0151] The preset current threshold may be 1.5 times the current value of the current bus of the server, and the preset temperature threshold may be 105 degrees Celsius.

[0152] In the above embodiments, when describing one circuit being connected to another circuit, or describing the output terminal of one circuit being connected to the input terminal of another circuit, it can mean that the two circuits are directly connected, or it can mean that the two circuits are indirectly connected, that is, there may be other circuits or intermediate components between the two circuits. In any case, there is a signal flow relationship between the two circuits.

[0153] In a third aspect, an embodiment of the present application provides a method for installing a server, which may include the following steps:

[0154] Connect the power supply to the server's power interface, and

[0155] Insert the first contact of the power supply device into the power supply end at a preset speed.

[0156] Among them, the power supply device is the power supply device disclosed in any embodiment of the first aspect, and the power interface of the server is a server power supply interface that can be connected to a PSU power supply.

[0157] The preset speed is smaller than the quotient of the current value output by the current limiting circuit and the product of the difference between the lengths of the first contact and the second contact, the capacity of the filter capacitor, and the power supply voltage of the server.

[0158] By inserting the power supply device electrically connected to the server into the power supply end at a preset speed, during the process of inserting the power supply device into the power supply end, the first contact contacts the power supply end before the second contact, and the current is transmitted to the second contact position through the contact between the first contact and the power supply end, so as to pre-increase the voltage of the second contact, and as the power supply device continues to be inserted, the voltage value at the second contact position approaches or is equal to the positive voltage value of the power supply end. At the moment when the second contact is inserted into the power supply end to conduct the circuit, there will be no electric spark caused by the instantaneous large voltage difference, thereby improving the safety and reliability of the server power supply.

[0159] In some specific embodiments, when a server is electrically connected to multiple power supply devices, electrically connecting the power supply devices to the power interface of the server includes: electrically connecting the multiple power supply devices to multiple target power interfaces respectively, wherein the target power interface is a power supply interface whose power supply path length with the server mainboard is within a preset range.

[0160] Exemplarily, when the server is electrically connected to N power supply devices, N power supply interfaces with the smallest power supply path differences among the server power supply interfaces are selected for connection to the power supply devices, ensuring that the impedance difference of the N formed power supply paths is minimal.

[0161] In some embodiments, the power supply terminal includes a conductive interface. Inserting the first contact of the power supply device into the power supply terminal at a preset speed includes: inserting the first contact of the power supply device into the conductive interface at a preset speed. Specifically, the conductive interface can be a copper busbar.

[0162] By controlling the advancement speed of the first contact into the conductive interface of the power supply end, it can be ensured that after the first contact is inserted, when the second contact is inserted into the conductive interface of the power supply end, the voltage value on the current transmission circuit connected to the second contact approaches or is equal to the positive pole voltage value of the power supply end, thereby avoiding the occurrence of electric sparks.

[0163] In some embodiments, the server installation method further includes: after the second contact of the power supply device is inserted into the power supply end, controlling the server to start up.

[0164] In related technologies, starting the server when the power supply device has not been fully inserted into the conductive interface of the power supply end will cause current to be introduced into the server at the moment the power supply device contacts the power supply end. At this time, the current is unstable, and there are safety risks in the operation of the server.

[0165] In an embodiment of the present application, the server must be started after the second contact of the power supply device is inserted into the power supply end, that is, the server is started after the power supply device is fully inserted into the conductive interface. At this time, the filter capacitor in the power supply device has been fully charged, and the current and voltage transmitted through the power supply device are stable, which can improve the safety and reliability of the server operation.

[0166] In some embodiments, as a computer device, as shown in FIG11 , server 1100 may include a processor 1102, a non-volatile storage medium 1103, an internal memory 1104, and a network interface 1105 connected via a system bus 1101. Processor 1102 provides computing and control capabilities. Non-volatile storage medium 1103 and internal memory 1104 serve as the memory for server 1100. Non-volatile storage medium 1103 stores an operating system 11031 and computer-readable instructions 11032. Internal memory 1104 provides an environment for the operation of operating system 11031 and computer-readable instructions 11032 in non-volatile storage medium 1103. Network interface 1105 is used to communicate with external terminals or other servers via a network connection. In other embodiments, server 1100 may include more or fewer components, combine certain components, or have a different component arrangement.

[0167] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0168] The above embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the appended claims.

Claims

1. A power supply device, characterized in that: The power supply device includes a first contact and a second contact; The first contact is used to electrically connect the conductive interface of the power supply end and the second contact; The second contact is used to electrically connect the conductive interface of the power supply end and the power interface of the server; The length of the first contact is greater than the length of the second contact, so that when the power supply device is inserted into the power supply end, the first contact first contacts the conductive interface to pre-increase the voltage of the second contact, and then the second contact starts to connect with the conductive interface to power the server.

2. The device according to claim 1, characterized in that The first contact is elastically retractable, and in the retracting direction, the length of the fully extended first contact is greater than the length of the second contact, so that when the power supply device is inserted into the power supply end, the first contact is in an elastically retracted state after abutting against the conductive interface.

3. The device according to claim 2, characterized in that The first contact and the second contact are arranged in parallel in the extension direction.

4. The device according to any one of claims 1 to 3, characterized in that The power supply device further includes a current limiting circuit connected between the first contact and the second contact.

5. The device according to claim 4, characterized in that The power supply device further includes a filtering tank circuit connected to the second contact. The filtering tank circuit includes a filtering capacitor for storing and filtering the current transmitted to the second contact via the current limiting circuit.

6. The device according to claim 5, characterized in that The power supply device further includes a current leakage circuit and a logic control circuit; The leakage circuit includes a leakage switch, and the three ends of the leakage switch are respectively connected to the second contact, the logic control circuit and the ground end; The logic control circuit is used to control the switching state of the discharge switch, and when the discharge switch is turned on, the current in the filter capacitor is discharged.

7. The device according to claim 5, characterized in that The length difference between the first contact and the second contact is the quotient of the product of the preset plug-in speed of the power supply device and the current value output by the current limiting circuit and the product of the capacity value of the filter capacitor and the power supply voltage value of the server.

8. The device according to claim 7, characterized in that The capacity of the filter capacitor ranges from 5000 μF to 10000 μF; The server power supply voltage is 12V or 54V; The preset plugging speed ranges from 0.01 m / s to 0.5 m / s; The current value output by the current limiting circuit ranges from 2A to 10A.

9. The device according to claim 7 or 8, characterized in that The length difference ranges from 0.01 m to 0.3 m.

10. The device according to any one of claims 1 to 9, characterized in that The first contact and the second contact both include metal sheets, and the metal sheets of the first contact and the second contact are used to connect the conductive interface to achieve electrical conduction from the power supply end.

11. The device according to any one of claims 1 to 10, characterized in that The load current value of the first contact is smaller than the load current value of the second contact, and the load current value of the second contact is determined by the power value of the server and the power supply voltage value of the server.

12. The device according to any one of claims 1 to 11, characterized in that The power supply device further includes a current transmission circuit connected between the second contact and the server power interface; The current transmission circuit includes a current detection circuit and a current switching circuit; the power supply device also includes a logic control circuit; The current detection circuit includes a current detection component, which is connected to the logic control circuit to detect the current value of the current transmission circuit and transmit the current value to the logic control circuit; The current switching circuit includes a current switching component, and the current switching component is connected to the logic control circuit; The logic control circuit is used to control the switch state of the current switch component according to the current value of the current transmission circuit, so as to change the current transmission state between the current transmission circuit and the server power interface.

13. The device according to claim 12, characterized in that The current switching component includes a control switch and a field effect transistor, wherein the gate terminal of the field effect transistor is connected to the control switch, and the drain terminal and the source terminal of the field effect transistor are respectively connected to the two ends of the current transmission circuit to adjust the current flow state of the current transmission circuit according to the gate voltage generated by the control switch.

14. The device according to claim 13, characterized in that The logic control circuit is further configured to: In response to a current value of the current transmission circuit being greater than a preset second current threshold and less than a preset first current threshold, reducing the gate voltage generated by the control switch to reduce the current value of the current transmission circuit until the current value of the current transmission circuit is less than the second current threshold; as well as In response to a current value of the current transmission circuit being greater than the first current threshold, closing the control switch to cut off current transmission of the current transmission circuit; The first current threshold is greater than the second current threshold, and the first current threshold and the second current threshold are multiples of a preset server current threshold.

15. The device according to any one of claims 12 to 14, characterized in that The power supply device further includes a temperature detection circuit for detecting the temperature of the current switch assembly; The temperature detection circuit is connected to the logic control circuit, and the logic control circuit is further used to: in response to the temperature data transmitted by the temperature detection circuit being greater than a preset temperature threshold, turn off the current switch component to cut off the current transmission of the current transmission circuit.

16. A computer system, characterized in that: The system includes: a power supply end, a server, and a power supply device according to any one of claims 1 to 15; the power supply device is used to electrically connect the power supply end and the power interface of the server to realize power supply to the server.

17. The system according to claim 16, wherein: The conductive interface of the power supply end is a copper busbar, which is used to transmit direct current; The power interface of the server is a power supply interface; The power supply device is used to connect the copper busbar and the power supply interface to realize power supply to the server.

18. The system according to claim 16 or 17, characterized in that The system includes a plurality of power supply devices; The multiple power supply devices are used to connect the server and the power supply end to form a parallel circuit to power the server; wherein, the operating power of the server is greater than the rated power of any one of the power supply devices, and the total rated power of the multiple power supply devices is greater than the operating power of the server.

19. The system according to claim 18, wherein: The plurality of power supplies include a redundant power supply.

20. The system according to claim 18 or 19, characterized in that Any two of the multiple power supply devices have the same size specifications and circuit design.

21. The system according to any one of claims 18 to 20, characterized in that The rated current of the current limiting circuit of each of the plurality of power supply devices is proportional to the number of the power supply devices.

22. The system according to any one of claims 18 to 21, characterized in that The server includes a control circuit, and each of the multiple power supply devices is connected to the control circuit of the server, so that the control circuit of the server obtains circuit parameters of each power supply device, wherein the circuit parameters include current value and / or temperature data of the current transmission circuit.

23. The system according to claim 22, wherein: The control circuit of the server is used for: In response to the current values ​​of the current transmission circuits of all power supply devices in the system being greater than a preset current threshold, controlling the current switch components of all power supply devices to cut off current transmission; or, In response to the temperature data of all power supply devices in the system being higher than a preset temperature threshold, the current switch components of all power supply devices are controlled to cut off current transmission.

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