A high power density server power supply system and implementation method thereof

Abstract

The application provides a high-power-density server power supply system and an implementation method thereof, and belongs to the technical field of server system power supply. The system comprises a control logic module, a power supply and at least one power supply branch. The power supply branches are connected in parallel, each power supply branch is provided with a load, and each power supply branch is connected with a capacitor group switch module. The power supply input end of the power supply is connected with an input voltage detection module, each capacitor group switch module is connected with a capacitor group voltage detection module, and the load output end of each power supply branch is connected with a load branch output voltage detection module. The control logic module is connected with the voltage detection module, each capacitor group voltage detection module and each load branch output voltage detection module. The application avoids the circuit board damage hidden dangers such as sharp peak current engine connector, board card ablation and component damage caused by the rapid shutdown of the abnormal protection circuit, and avoids the system timing disorder problem caused by the slow power-off of the large-capacity system.

Description

Technical Field

[0001] This invention belongs to the field of server system power supply technology, specifically relating to a high power density server power supply system and its implementation method. Background Technology

[0002] With the development of new Internet technologies such as cloud computing, AI, and big data, server performance is becoming increasingly powerful, and server power density is increasing. In high-power-density systems, processor chips have higher power and often have short-term overclocking capabilities. For example, an AI GPU chip with a rated power of 700W can reach twice the power of 1400W under overclocking conditions. In order to achieve the short-term overclocking capability of high-power processor chips, a large number of filter capacitors are placed in the system power supply design. The energy stored in the large number of filter capacitors is used to meet the power supply stability requirements for short-term overclocking.

[0003] However, a large number of filter capacitors can cause short-term spike currents when the power is turned on due to the charging of the capacitors. These short-term spike currents can easily generate contact breakdown sparks, which can damage the system power supply connectors and power supply, causing connector and board burning problems, and in severe cases, even creating a fire hazard.

[0004] In addition, when the system loses power, due to the huge energy stored in the capacitor, even after the power supply is disconnected, the system voltage is released very slowly due to the lack of a return path because the system load is shut down. This can easily cause system timing disorder, and the system cannot be restarted in a short time.

[0005] In high-power-density server power supplies, to meet the short-term overclocking capabilities of high-power processors, the system input is designed with high-specification power connectors and power cables. At the same time, a number of filter capacitors are placed in the system power supply path, and a resistive dummy load is placed after the system filter capacitors to release the energy stored in the capacitors after the system is shut down.

[0006] In existing solutions, in order to reduce the peak current of short-term charging of large capacitors, higher-specification power connectors and power cables are selected, and the contact area of ​​the power supply interface is increased to avoid the peak current generated when the contact area is small, which will cause breakdown sparks and lead to connector and board burning problems.

[0007] For example, if the actual rated power of the system is 1000W and the rated current of the 12V power supply system is about 83.3A, and the system's power supply connector selection will be derated due to temperature rise, aging, and short-term overclocking power capability, a 100A power connector specification will be selected. However, in order to enhance the short-term peak current withstand capability, a connector with strong voltage withstand, current withstand and inter-terminal insulation capability will be selected, resulting in an increase in connector selection specifications, as well as an increase in the size and cost of the selected components.

[0008] In addition, if there is a protection circuit in the circuit, when the downstream load is abnormal, the protection circuit will quickly shut down. Due to the sudden change in electromotive force, the energy in the circuit will often bring about a sudden peak current and an accompanying abnormal peak voltage. This can easily cause damage to the components in the circuit.

[0009] Furthermore, adding a resistive dummy load to address the slow power-down of the system will result in power loss even during normal system operation, leading to energy waste. If the resistive dummy load device fails and short-circuits, it can also easily cause board burn-out.

[0010] This is a shortcoming of the existing technology. Therefore, it is very necessary to provide a high power density server power supply system and its implementation method to address the above-mentioned defects in the existing technology. Summary of the Invention

[0011] To address the shortcomings of existing power supply designs for high-power-density server and computer systems, such as the potential for circuit board damage (e.g., connector and board burn-out, component damage) caused by spike currents during power-up and rapid circuit shutdown under abnormal protection, as well as the system timing disorder caused by slow power-down in large-capacity systems, this invention provides a high-power-density server power supply system and its implementation method to solve the aforementioned technical problems.

[0012] In a first aspect, the present invention provides a high power density server power supply system, including a control logic module, a power supply and at least one power supply branch;

[0013] Each power supply branch is connected in parallel, each power supply branch is equipped with a load, and each power supply branch is connected to a capacitor bank switch module;

[0014] The power supply input terminal is connected to an input voltage detection module, each capacitor bank switch module is connected to a capacitor bank voltage detection module, and each power supply branch load output terminal is connected to a load branch output voltage detection module.

[0015] The control logic module is connected to the voltage detection module of each capacitor bank and the output voltage detection module of each load branch. The control logic module is connected to the capacitor bank switching module, the power supply branch, and the capacitor bank voltage detection module, and is responsible for coordinating the switching of the power supply branch and the opening and closing of the capacitor bank circuit.

[0016] Furthermore, each power supply branch is equipped with a switch module;

[0017] Each switch module is connected to the control logic module.

[0018] Furthermore, each capacitor bank switching module includes a capacitor bank and a capacitor switching MOSFET;

[0019] The capacitor bank consists of several capacitors connected in parallel. The negative terminal of the capacitor is grounded, the positive terminal of the capacitor is connected to the source of the capacitor switching MOSFET, the drain of the capacitor switching MOSFET is connected to the corresponding power supply branch, and the gate of the capacitor switching MOSFET is connected to the control logic module.

[0020] The input voltage detection module, the voltage detection modules of each capacitor bank, and the output voltage detection modules of each load branch all use operational amplifiers;

[0021] The non-inverting input of the operational amplifier is connected to the acquired voltage input, the inverting input is grounded, and the output is connected to the control logic module.

[0022] The switching module uses switching MOSFETs;

[0023] The drains of the switching MOSFETs in each switching module are connected to each other and connected to the power supply.

[0024] The source of the switching module is connected to the load terminal of the corresponding power supply branch, and the gate of the switching module is connected to the control logic module. Each branch can be directly connected to the main power supply branch, or a switching device can be added as a switching circuit, or an E-FUSE circuit with protection function can be used as the switching circuit. Each power supply branch contains a filter capacitor bank and its switching circuit. The switching circuit of the filter capacitor bank can use a MOSFET and its driver circuit as the switching circuit. The advantage of the capacitor bank switching module is that it can control the opening degree of the capacitor bank circuit, thereby controlling the charging current of the capacitor bank. The capacitance value of the filter capacitor in the capacitor bank switching module is set according to the requirements of the load circuit. The current path between the capacitor bank filter circuit and the branch adopts the shortest path and increases the area of ​​the connection channel to reduce the parasitic inductance parameters in the circuit.

[0025] Furthermore, each power supply branch is equipped with a capacitor whose capacitance is less than the capacitance threshold.

[0026] The capacitance value of each capacitor bank switching module is greater than the capacitance threshold. Only the necessary minimum filter capacitor is directly connected to the power supply branch, and the large capacitance capacitor bank circuit is connected to the power supply branch through a switching circuit.

[0027] Secondly, the present invention provides a method for implementing a high power density server power supply system, comprising the following steps:

[0028] S 1. Divide the power supply into several power supply branches and set up a capacitor bank switching circuit for each power supply branch;

[0029] S 2. Divide the load into several load branches and set each load branch to be powered by a power supply branch;

[0030] S 3. The control logic module monitors the power supply voltage, the voltage of each power supply branch, and the voltage of each capacitor bank switching circuit, and controls the power-on and power-off of the server system.

[0031] Furthermore, the specific steps of step S1 are as follows:

[0032] S 11. Divide the power supply path into several power supply branches according to the server's processor power and system configuration;

[0033] S 12. Connect the required filter capacitors (less than the capacitor threshold) of each power supply branch directly to the corresponding power supply branch;

[0034] S 13. Connect the capacitors required by each power supply branch that are greater than the capacitor threshold in parallel to form a capacitor bank, and connect the capacitor bank to the corresponding power supply branch through a switching circuit. Then connect the capacitor bank switching circuit to the control logic module.

[0035] Furthermore, the specific steps of step S2 are as follows:

[0036] S 21. Divide the total load into several load branches according to the load type and power;

[0037] S 22. Determine whether the load branch and the power supply branch are directly connected;

[0038] If so, proceed to step S23;

[0039] If not, proceed to step S24;

[0040] S 23. Each load branch is directly connected to a power supply branch and is powered by the directly connected power supply branch. Proceed to step S3.

[0041] S 24. Each load branch is connected to the power supply branch through a switching circuit or a switching circuit, and the switching circuit or switching circuit is connected to the control logic module.

[0042] Furthermore, the specific steps of step S3 are as follows:

[0043] S 31. An input voltage detection module is set at the power supply input terminal of the power supply;

[0044] S 32. Set up a load branch output voltage detection module for the load output terminal of each power supply branch;

[0045] S 33. Set up a capacitor bank voltage detection module for each capacitor bank;

[0046] S 34. Configure the control logic module to connect to the input voltage detection module, the output voltage detection module of each load branch, and the voltage detection module of each capacitor bank;

[0047] S 35. Determine whether the power supply branch has a switching circuit or a switching on / off circuit;

[0048] If so, proceed to step S36;

[0049] If not, proceed to step S37;

[0050] S 36. The control logic module controls the server system to power on and off based on the power supply voltage, the voltage of each power supply branch, the voltage of each capacitor bank switching circuit, and the switching circuit or switching on / off circuit of each power supply branch, and then ends.

[0051] S 37. The control logic module controls the power-on and power-off of the server system based on the power supply voltage, the voltage of each power supply branch, and the voltage of each capacitor bank switching circuit. The switching channel circuit can use an E-FUSE protection circuit.

[0052] Furthermore, step S36 is as follows:

[0053] S 3611. Before the system is powered on, the control logic module obtains the power supply voltage through the input voltage detection module;

[0054] S 3612. The control logic module determines whether the power supply voltage has reached the lower limit of the input allowable voltage;

[0055] If so, proceed to step S 3613;

[0056] If not, return to step S 3611;

[0057] S 3613. The control logic module sequentially sends a switch power-on signal to the switch circuit or switch on / off circuit of the power supply branch that needs to be turned on, and the circuit from the power supply branch to the load branch is connected.

[0058] S 3614. The control logic module obtains the voltage of the activated load branch through the load branch output voltage detection module and determines whether the load branch voltage reaches the load voltage threshold.

[0059] If so, proceed to step S 3615;

[0060] If not, return to step S 3613;

[0061] S 3615. The control logic module turns on the corresponding capacitor bank switching circuit for the power supply branch where the load branch voltage reaches the load voltage threshold, and controls the drive signal of the corresponding capacitor bank switching circuit to increase according to the set step size.

[0062] S 3616. The control logic module determines whether the capacitor bank voltage has reached the capacitor bank voltage threshold.

[0063] If so, power on is complete, proceed to step S 3617;

[0064] If not, return to step S 3615;

[0065] S 3617. When the system needs to be shut down, the control logic module sends a shutdown signal to the capacitor bank switching circuit of each power supply branch in sequence;

[0066] S 3618. The switching circuits or switching circuits of each power supply branch of the control logic module send off signals in sequence;

[0067] S 3619. The control logic module determines whether the system needs to be restarted within a set time period;

[0068] If so, proceed to step S 3620;

[0069] If not, power-off complete, end;

[0070] S 3620. The control logic module detects the voltage of the capacitor bank voltage detection module of the corresponding power supply branch;

[0071] S 3621. The control logic module sends an on signal to the switching circuit or switching circuit of each power supply branch and controls the voltage of the load branch to increase in a set step size.

[0072] S 3622. The control logic module determines whether the voltage of each load branch is consistent with the voltage of the capacitor bank of the corresponding power supply branch;

[0073] If so, proceed to step S 3623;

[0074] If not, return to step S 3621;

[0075] S 3623. The control logic module sends an enable signal to the capacitor bank switch circuit of the corresponding power supply branch, sets the capacitor bank switch circuit to be connected to the power supply branch according to the set step size, and completes the power-on.

[0076] Furthermore, step S37 is as follows:

[0077] S 3711. Before the system is powered on, the control logic module obtains the power supply voltage through the input voltage detection module;

[0078] S 3712. When the power is turned on by the input power, the control logic module determines whether the voltage of the corresponding load branch reaches the set ratio of the voltage threshold through the output voltage detection module of the corresponding load branch.

[0079] If so, proceed to step S 3713;

[0080] If not, return to step S 3712;

[0081] S 3713. The control logic module turns on the corresponding capacitor bank switching circuit for a set proportion of power supply branches based on whether the load branch voltage reaches the voltage threshold, and controls the drive signal of the corresponding capacitor bank switching circuit to increase according to the set step size.

[0082] S 3714. The control logic module determines whether the capacitor bank voltage has reached the capacitor bank voltage threshold.

[0083] If so, power-on complete, proceed to step S 3715;

[0084] If not, return to step S 3713;

[0085] S 3715. When the system needs to be shut down, the control logic module sends a shutdown signal to the capacitor bank switching circuit of each power supply branch in sequence;

[0086] S 3716. The control module sends a command to the power supply to shut down the power;

[0087] S 3717. The control logic module determines whether the system needs to be restarted within a set time period;

[0088] If so, proceed to step S 3718;

[0089] If not, power-off complete, end;

[0090] S 3718. The control logic module detects the voltage of the capacitor bank voltage detection module of the corresponding power supply branch;

[0091] S 3719. The control logic module sends a power-on signal to the power supply.

[0092] S 3720. The control logic module determines whether the voltage of each load branch is consistent with the voltage of the capacitor bank of the corresponding power supply branch;

[0093] If so, proceed to step S 3721;

[0094] If not, return to step S 3719;

[0095] S 3721. The control logic module sends an enable signal to the capacitor bank switch circuit of the corresponding power supply branch, sets the capacitor bank switch circuit to be connected to the power supply branch according to the set step size, and completes the power-on.

[0096] The beneficial effects of this invention are as follows:

[0097] The high power density server power supply system and its implementation method provided by the present invention control the capacitor bank to slowly power on and quickly power off, thereby avoiding the potential damage to the circuit board such as connector and board burn-out and component damage caused by the peak current caused by the rapid shutdown of the circuit during abnormal protection, as well as avoiding the system timing disorder caused by the slow power-down of the large capacitance system.

[0098] Furthermore, the design principle of this invention is reliable, the structure is simple, and it has a very wide range of application prospects.

[0099] Therefore, it is evident that the present invention has outstanding substantive features and significant progress compared with the prior art, and the beneficial effects of its implementation are also obvious. Attached Figure Description

[0100] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0101] Figure 1 This is a circuit diagram of Embodiment 1 of the high power density server power supply system of the present invention.

[0102] Figure 2 This is a circuit diagram of Embodiment 2 of the high power density server power supply system of the present invention.

[0103] Figure 3 This is a flowchart of Embodiment 3 of the high power density server power supply system implementation method of the present invention.

[0104] Figure 4 This is a flowchart of Embodiment 4 of the high power density server power supply system implementation method of the present invention.

[0105] Figure 5 This is a schematic diagram of the power-on and power-off process of a system with a switching circuit in the power supply branch of this invention.

[0106] Figure 6 This is a schematic diagram of the power-on and power-off process of a system whose power supply branch has no switching circuit.

[0107] In the diagram, 1-control logic module; 2-power supply; 3-load; 4-capacitor bank switch module; 5-input voltage detection module; 6-capacitor bank voltage detection module; 7-load branch output voltage detection module; 8-switch module. Detailed Implementation

[0108] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0109] Example 1:

[0110] like Figure 1 As shown, the present invention provides a high power density server power supply system, including a control logic module 1, a power supply 2, and at least one power supply branch;

[0111] Each power supply branch is connected in parallel, each power supply branch is equipped with a load 3, and each power supply branch is connected to a capacitor bank switch module 4;

[0112] The power input terminal of the power supply 2 is connected to the input voltage detection module 5, each capacitor bank switch module 4 is connected to a capacitor bank voltage detection module 6, and each power supply branch load output terminal is connected to a load branch output voltage detection module 7.

[0113] The control logic module 1, voltage detection module 5, voltage detection modules 6 of each capacitor bank, and output voltage detection modules 7 of each load branch are all connected.

[0114] Example 2:

[0115] like Figure 2 As shown, the present invention provides a high power density server power supply system, including a control logic module 1, a power supply 2, and at least one power supply branch;

[0116] Each power supply branch is connected in parallel, each power supply branch is equipped with a load 3, and each power supply branch is connected to a capacitor bank switch module 4;

[0117] The power input terminal of the power supply 2 is connected to the input voltage detection module 5, each capacitor bank switch module 4 is connected to a capacitor bank voltage detection module 6, and each power supply branch load output terminal is connected to a load branch output voltage detection module 7.

[0118] The control logic module 1, voltage detection module 5, voltage detection modules 6 of each capacitor bank, and output voltage detection modules 7 of each load branch are all connected.

[0119] Each power supply branch is equipped with a switch module 8;

[0120] Each switch module 8 is connected to the control logic module 1;

[0121] Each capacitor bank switching module 4 includes a capacitor bank and a capacitor switching MOSFET;

[0122] The capacitor bank includes several capacitors connected in parallel. The negative terminal of the capacitor is grounded, the positive terminal of the capacitor is connected to the source of the capacitor switching MOSFET, the drain of the capacitor switching MOSFET is connected to the corresponding power supply branch, and the gate of the capacitor switching MOSFET is connected to the control logic module 1.

[0123] The input voltage detection module 5, the voltage detection modules of each capacitor bank 6, and the output voltage detection modules of each load branch 7 all use operational amplifiers;

[0124] The non-inverting input of the operational amplifier is connected to the acquired voltage input, the inverting input of the operational amplifier is grounded, and the output of the operational amplifier is connected to the control logic module 1.

[0125] Switching module 8 uses a switching MOSFET;

[0126] The drains of the switching MOSFETs in each switching module 8 are connected to each other and connected to the power supply 2;

[0127] The source of the switching module 8 is connected to the load terminal of the corresponding power supply branch, and the gate of the switching module 8 is connected to the control logic module 1.

[0128] Each power supply branch is equipped with a capacitor whose capacitance value is less than the capacitance threshold.

[0129] The capacitance value of each capacitor bank switch module 4 is greater than the capacitance threshold.

[0130] Example 3:

[0131] like Figure 3 As shown, the present invention provides a method for implementing a high power density server power supply system, comprising the following steps:

[0132] S 1. Divide the power supply into several power supply branches and set up a capacitor bank switching circuit for each power supply branch;

[0133] S 2. Divide the load into several load branches and set each load branch to be powered by a power supply branch;

[0134] S 3. The control logic module monitors the power supply voltage, the voltage of each power supply branch, and the voltage of each capacitor bank switching circuit, and controls the power-on and power-off of the server system.

[0135] Example 4:

[0136] like Figure 4 As shown, the present invention provides a method for implementing a high power density server power supply system, comprising the following steps:

[0137] S1. Divide the power supply into several power supply branches, and set up a capacitor bank switching circuit for each power supply branch; the specific steps of step S1 are as follows:

[0138] S 11. Divide the power supply path into several power supply branches according to the server's processor power and system configuration;

[0139] S 12. Connect the required filter capacitors (less than the capacitor threshold) of each power supply branch directly to the corresponding power supply branch;

[0140] S 13. Connect the capacitors required by each power supply branch that are greater than the capacitor threshold in parallel to form a capacitor bank, and connect the capacitor bank to the corresponding power supply branch through a switching circuit. Then connect the capacitor bank switching circuit to the control logic module.

[0141] S2. Divide the load into several load branches and set each load branch to be powered by a power supply branch; the specific steps of step S2 are as follows:

[0142] S 21. Divide the total load into several load branches according to the load type and power;

[0143] S 22. Determine whether the load branch and the power supply branch are directly connected;

[0144] If so, proceed to step S23;

[0145] If not, proceed to step S24;

[0146] S 23. Each load branch is directly connected to a power supply branch and is powered by the directly connected power supply branch. Proceed to step S3.

[0147] S 24. Each load branch is connected to the power supply branch through a switching circuit or a switching circuit, and the switching circuit or switching circuit is connected to the control logic module.

[0148] S 3. The control logic module monitors the power supply voltage, the voltage of each power supply branch, and the voltage of each capacitor bank switching circuit, and controls the power-on and power-off of the server system;

[0149] The specific steps of step S3 are as follows:

[0150] S 31. An input voltage detection module is set at the power supply input terminal of the power supply;

[0151] S 32. Set up a load branch output voltage detection module for the load output terminal of each power supply branch;

[0152] S 33. Set up a capacitor bank voltage detection module for each capacitor bank;

[0153] S 34. Configure the control logic module to connect to the input voltage detection module, the output voltage detection module of each load branch, and the voltage detection module of each capacitor bank;

[0154] S 35. Determine whether the power supply branch has a switching circuit or a switching on / off circuit;

[0155] If so, proceed to step S36;

[0156] If not, proceed to step S37;

[0157] S 36. The control logic module controls the server system to power on and off based on the power supply voltage, the voltage of each power supply branch, the voltage of each capacitor bank switching circuit, and the switching circuit or switching on / off circuit of each power supply branch, and then ends.

[0158] S 37. The control logic module controls the power-on and power-off of the server system based on the power supply voltage, the voltage of each power supply branch, and the voltage of each capacitor bank switching circuit.

[0159] like Figure 5 As shown, in the above embodiment 4, step S 36 specifically involves the following steps:

[0160] S 3611. Before the system is powered on, the control logic module obtains the power supply voltage through the input voltage detection module;

[0161] S 3612. The control logic module determines whether the power supply voltage has reached the lower limit of the input allowable voltage; if the input voltage has reached the lower limit of the input allowable voltage, that is, when the minimum system voltage requirement is met, the control logic module considers the input power supply to be ready.

[0162] If so, proceed to step S 3613;

[0163] If not, return to step S 3611;

[0164] S 3613. The control logic module sequentially sends a switch power-on signal to the switch circuit or switch on / off circuit of the power supply branch that needs to be turned on, and the circuit from the power supply branch to the load branch is connected; the branch switch circuit or E-FUSE protection circuit opens the channel of each branch through its corresponding drive circuit or other closing circuit, and the circuit from the power supply input terminal to the load terminal is connected.

[0165] S 3614. The control logic module obtains the voltage of the activated load branch through the load branch output voltage detection module and determines whether the load branch voltage reaches the load voltage threshold. Each load branch voltage feedback module feeds back the voltage at the load end to the control logic module. According to the control logic, if the corresponding load circuit has been activated and the output voltage has reached the corresponding load allowable input voltage range, the control logic can proceed to the next step. The number of activated load circuit branches is unlimited and depends on the control logic. It can be only one branch or multiple branches.

[0166] If so, proceed to step S 3615;

[0167] If not, return to step S 3613;

[0168] S 3615. The control logic module activates the corresponding capacitor bank switching circuit for power supply branches where the load branch voltage reaches the load voltage threshold, and controls the drive signal of the corresponding capacitor bank switching circuit to increase according to the set step size; the switching drive signal of each branch filter capacitor circuit will gradually increase, gradually opening the filter circuit channel. Since the switching circuit opens slowly, the current of the filter capacitor bank will not be too large, avoiding the current spike when the large capacitance capacitor is charging quickly; reducing the load pressure and charging current spike of the large capacitance capacitor during the voltage rise process of the power supply in the past; since the input power supply has fully risen to the normal voltage at this time, there is enough energy to provide charging current for the large capacitor, and it will not affect the voltage at the output load end;

[0169] S 3616. The control logic module determines whether the capacitor bank voltage has reached the capacitor bank voltage threshold.

[0170] If so, power-on is completed, proceed to step S 3617; after the load voltage of each branch and the corresponding filter capacitor bank circuit have all risen to the normal voltage, the power-on process of the system is completed.

[0171] If not, return to step S 3615;

[0172] S 3617. When the system needs to be shut down, the control logic module sends turn-off signals sequentially to the capacitor bank switching circuits of each power supply branch; the control logic module also sends turn-off signals sequentially to the filter capacitor switches of each branch, and the corresponding drive circuits quickly pull down the drive signals. During the turn-off process, since the connection voltage of the filter capacitors is at the same level, the energy of the capacitor bank will be rapidly discharged, and there will be no instantaneous current erosion between the capacitor bank and the branch circuit. After the capacitor bank circuit is disconnected, the energy in the capacitors will be gradually released in the form of leakage current.

[0173] S 3618. The switching circuits or switching circuits of each power supply branch of the control logic module send off signals in sequence; since the energy stored in the small number of filter capacitors in the back-end load circuit will not cause stress release of the branch switching circuit devices, the back-end load branch will quickly lose power, thereby completing the power-off process of the system.

[0174] S 3619. The control logic module determines whether the system needs to be restarted within a set time period;

[0175] If so, proceed to step S 3620;

[0176] If not, power-off complete, end;

[0177] S 3620. The control logic module detects the voltage of the capacitor bank voltage detection module of the corresponding power supply branch;

[0178] S 3621. The control logic module sends an on signal to the switching circuit or switching circuit of each power supply branch and controls the voltage of the load branch to increase according to the set step size; the voltage of the downstream load branch gradually increases, and the voltage feedback signal of the load circuit feeds back the corresponding load voltage to the control logic module in real time.

[0179] S 3622. The control logic module determines whether the voltage of each load branch is consistent with the voltage of the capacitor bank of the corresponding power supply branch;

[0180] If so, proceed to step S 3623;

[0181] If not, return to step S 3621;

[0182] S 3623. The control logic module sends an enable signal to the capacitor bank switch circuit of the corresponding power supply branch, sets the capacitor bank switch circuit to connect to the power supply branch according to the set step size, and completes the power-on; the control logic module sends a signal to the filter capacitor bank switch drive circuit, and the filter capacitor bank circuit is gradually connected to the branch channel; in this process, since the filter capacitor bank already has a certain amount of energy and the drive is gradually turned on, there will be no large charging current spike in the branch circuit.

[0183] like Figure 6 As shown, in the above embodiment 4, step S 37 specifically involves the following steps:

[0184] S 3711. Before the system is powered on, the control logic module obtains the power supply voltage through the input voltage detection module; at this time, the input voltage is 0V;

[0185] S 3712. When the input power is turned on, the control logic module determines whether the voltage of the corresponding load branch has reached the set percentage of the voltage threshold through the output voltage detection module of the corresponding load branch; when the input power is turned on, the output voltage gradually increases; for example, the set percentage is 2%;

[0186] If so, proceed to step S 3713;

[0187] If not, return to step S 3712;

[0188] S 3713. The control logic module activates the corresponding capacitor bank switching circuit for power supply branches whose load branch voltage reaches a set voltage threshold, and controls the drive signal of the corresponding capacitor bank switching circuit to increase according to a set step size; the switching drive signal of each branch filter capacitor circuit will gradually increase, gradually opening the filter circuit channel; since the input voltage level is low at this time and the switching circuit opens slowly, the current of the filter capacitor bank will not be too large, avoiding the current spike when the large capacitance capacitor is charging quickly; the initial 2% voltage threshold of the power supply can be adjusted appropriately according to the system capacitor value or the input voltage level, such as setting the threshold to 1% when the voltage level is high;

[0189] S 3714. The control logic module determines whether the capacitor bank voltage has reached the capacitor bank voltage threshold.

[0190] If so, power-on complete, proceed to step S 3715;

[0191] If not, return to step S 3713;

[0192] S 3715. When the system needs to be shut down, the control logic module sends a shutdown signal to the capacitor bank switching circuit of each power supply branch in sequence; the corresponding drive circuit will quickly pull down the drive signal. During this shutdown process, since the connection voltage of the filter capacitor is at the same voltage level, the energy of the capacitor bank will be quickly discharged, and there is no instantaneous current erosion between it and the branch circuit; after the capacitor bank circuit is disconnected, the energy in the capacitor will be gradually released in the form of leakage current.

[0193] S 3716. The control module sends a command to the power supply to shut down the power;

[0194] S 3717. The control logic module determines whether the system needs to be restarted within a set time period;

[0195] If so, proceed to step S 3718;

[0196] If not, power-off complete, end;

[0197] S 3718. The control logic module detects the voltage of the capacitor bank voltage detection module of the corresponding power supply branch;

[0198] S 3719. The control logic module sends a power-on signal to the power supply; the voltage of the downstream load branch gradually increases, and the voltage feedback signal of the load circuit feeds back the corresponding load voltage to the control logic module in real time.

[0199] S 3720. The control logic module determines whether the voltage of each load branch is consistent with the voltage of the capacitor bank of the corresponding power supply branch;

[0200] If so, proceed to step S 3721;

[0201] If not, return to step S 3719;

[0202] S 3721. The control logic module sends an enable signal to the capacitor bank switch circuit of the corresponding power supply branch, sets the capacitor bank switch circuit to connect to the power supply branch according to the set step size, and completes the power-on; the control logic module sends a signal to the filter capacitor bank switch drive circuit, and the filter capacitor bank circuit is gradually connected to the branch channel; during this process, since the filter capacitor bank already has a certain amount of energy and the drive is gradually turned on, there will be no large charging current spike in the branch circuit.

[0203] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the invention should also be covered within the protection scope of the invention. Therefore, the protection scope of the invention should be determined by the scope of the claims.

Claims

1. A high power density server power supply system, characterized by, It includes a control logic module (1), a power supply (2), and at least one power supply branch; Each power supply branch is connected in parallel, and each power supply branch is equipped with a load (3), and each power supply branch is connected to a capacitor bank switch module (4). The power supply input terminal of the power supply (2) is connected to an input voltage detection module (5), each capacitor bank switch module (4) is connected to a capacitor bank voltage detection module (6), and each power supply branch load output terminal is connected to a load branch output voltage detection module (7). The control logic module (1) is connected to the voltage detection module (5), the voltage detection modules (6) of each capacitor bank, and the output voltage detection module (7) of each load branch. Each power supply branch is equipped with a switch module (8); Each switch module (8) is connected to the control logic module (1); Each capacitor bank switching module (4) includes a capacitor bank and a capacitor switching MOS transistor; The capacitor bank includes several capacitors connected in parallel. The negative terminal of the capacitor is grounded, the positive terminal of the capacitor is connected to the source of the capacitor switching MOSFET, the drain of the capacitor switching MOSFET is connected to the corresponding power supply branch, and the gate of the capacitor switching MOSFET is connected to the control logic module (1). The input voltage detection module (5), the voltage detection modules of each capacitor bank (6), and the output voltage detection modules of each load branch (7) all use operational amplifiers; The non-inverting input terminal of the operational amplifier is connected to the voltage input terminal of the acquisition, the inverting input terminal of the operational amplifier is grounded, and the output terminal of the operational amplifier is connected to the control logic module (1). The switching module (8) uses a switching MOSFET; The drains of the switching MOS transistors of each switching module (8) are connected to each other and connected to the power supply (2); The source of the switching module (8) is connected to the load terminal of the corresponding power supply branch, and the gate of the switching module (8) is connected to the control logic module (1). The system is configured to perform the following steps: S3611. Before the system is powered on, the control logic module obtains the power supply voltage through the input voltage detection module; S3612. The control logic module determines whether the power supply voltage has reached the lower limit of the input allowable voltage. If so, proceed to step S3613; If not, return to step S3611; S3613. The control logic module sequentially sends a switch power-on signal to the switch circuit or switch on / off circuit of the power supply branch that needs to be turned on, and the circuit from the power supply branch to the load branch is connected. S3614. The control logic module obtains the voltage of the activated load branch through the load branch output voltage detection module and determines whether the load branch voltage reaches the load voltage threshold. If so, proceed to step S3615; If not, return to step S3613; S3615. The control logic module turns on the corresponding capacitor bank switching circuit for the power supply branch where the load branch voltage reaches the load voltage threshold, and controls the drive signal of the corresponding capacitor bank switching circuit to increase according to the set step size. S3616. The control logic module determines whether the capacitor bank voltage has reached the capacitor bank voltage threshold. If so, power on is complete, proceed to step S3617; If not, return to step S3615; S3617. When the system needs to be shut down, the control logic module sends a shutdown signal to the capacitor bank switching circuit of each power supply branch in sequence; S3618. The switching circuits or switching circuits of each power supply branch of the control logic module send off signals in sequence; S3619. The control logic module determines whether the system needs to be restarted within a set time period; If so, proceed to step S3620; If not, power-off complete, end; S3620. The control logic module detects the voltage of the capacitor bank voltage detection module of the corresponding power supply branch; S3621. The control logic module sends an on signal to the switching circuit or switching circuit of each power supply branch and controls the voltage of the load branch to increase in a set step size. S3622. The control logic module determines whether the voltage of each load branch is consistent with the voltage of the capacitor bank of the corresponding power supply branch; If so, proceed to step S3623; If not, return to step S3621; S3623. The control logic module sends an enable signal to the capacitor bank switch circuit of the corresponding power supply branch, sets the capacitor bank switch circuit to be connected to the power supply branch according to the set step size, and completes the power-on.

2. The high power density server power supply system of claim 1, wherein, Each power supply branch is equipped with a capacitor whose capacitance value is less than the capacitance threshold. The capacitance value of each capacitor bank switch module (4) is greater than the capacitance threshold.

3. A high power density server power supply system implementation method, characterized in that, Includes the following steps: S1. Divide the power supply into several power supply branches, and set up a separate capacitor bank switching circuit for each power supply branch; S2. Divide the load into several load branches and set each load branch to be powered by a power supply branch; S3. The control logic module monitors the power supply voltage, the voltage of each power supply branch, and the voltage of each capacitor bank switching circuit, and controls the power-on and power-off of the server system. Each power supply branch is equipped with a switch module (8); Each switch module (8) is connected to the control logic module; Each capacitor bank switching module (4) includes a capacitor bank and a capacitor switching MOS transistor; The capacitor bank includes several capacitors connected in parallel. The negative terminal of the capacitor is grounded, the positive terminal of the capacitor is connected to the source of the capacitor switching MOSFET, the drain of the capacitor switching MOSFET is connected to the corresponding power supply branch, and the gate of the capacitor switching MOSFET is connected to the control logic module (1). The input voltage detection module (5), the voltage detection modules of each capacitor bank (6), and the output voltage detection modules of each load branch (7) all use operational amplifiers; The non-inverting input terminal of the operational amplifier is connected to the voltage input terminal of the acquisition, the inverting input terminal of the operational amplifier is grounded, and the output terminal of the operational amplifier is connected to the control logic module (1). The switching module (8) uses a switching MOSFET; The drains of the switching MOS transistors of each switching module (8) are connected to each other and connected to the power supply (2); The source of the switching module (8) is connected to the load terminal of the corresponding power supply branch, and the gate of the switching module (8) is connected to the control logic module (1). The specific steps of step S3 are as follows: S31. An input voltage detection module is set at the power supply input terminal of the power supply; S32. Set up a load branch output voltage detection module for the load output terminal of each power supply branch; S33. Set up a capacitor bank voltage detection module for each capacitor bank; S34. Configure the control logic module to connect to the input voltage detection module, the output voltage detection module of each load branch, and the voltage detection module of each capacitor bank; S35. Determine whether the power supply branch has a switching circuit or a switching circuit; If so, proceed to step S36; If not, proceed to step S37; S36. The control logic module controls the server system to power on and off based on the power supply voltage, the voltage of each power supply branch, the voltage of each capacitor bank switching circuit, and the switching circuit or switching on / off circuit of each power supply branch, and then ends. S37. The control logic module controls the power-on and power-off of the server system based on the power supply voltage, the voltage of each power supply branch, and the voltage of each capacitor bank switching circuit; The specific steps of step S36 are as follows: S3611. Before the system is powered on, the control logic module obtains the power supply voltage through the input voltage detection module; S3612. The control logic module determines whether the power supply voltage has reached the lower limit of the input allowable voltage. If so, proceed to step S3613; If not, return to step S3611; S3613. The control logic module sequentially sends a switch power-on signal to the switch circuit or switch on / off circuit of the power supply branch that needs to be turned on, and the circuit from the power supply branch to the load branch is connected. S3614. The control logic module obtains the voltage of the activated load branch through the load branch output voltage detection module and determines whether the load branch voltage reaches the load voltage threshold. If so, proceed to step S3615; If not, return to step S3613; S3615. The control logic module turns on the corresponding capacitor bank switching circuit for the power supply branch where the load branch voltage reaches the load voltage threshold, and controls the drive signal of the corresponding capacitor bank switching circuit to increase according to the set step size. S3616. The control logic module determines whether the capacitor bank voltage has reached the capacitor bank voltage threshold. If so, power on is complete, proceed to step S3617; If not, return to step S3615; S3617. When the system needs to be shut down, the control logic module sends a shutdown signal to the capacitor bank switching circuit of each power supply branch in sequence; S3618. The switching circuits or switching circuits of each power supply branch of the control logic module send off signals in sequence; S3619. The control logic module determines whether the system needs to be restarted within a set time period; If so, proceed to step S3620; If not, power-off complete, end; S3620. The control logic module detects the voltage of the capacitor bank voltage detection module of the corresponding power supply branch; S3621. The control logic module sends an on signal to the switching circuit or switching circuit of each power supply branch and controls the voltage of the load branch to increase in a set step size. S3622. The control logic module determines whether the voltage of each load branch is consistent with the voltage of the capacitor bank of the corresponding power supply branch; If so, proceed to step S3623; If not, return to step S3621; S3623. The control logic module sends an enable signal to the capacitor bank switch circuit of the corresponding power supply branch, sets the capacitor bank switch circuit to be connected to the power supply branch according to the set step size, and completes the power-on.

4. The high power density server power supply system implementation method of claim 3, wherein, The specific steps of step S1 are as follows: S11. Divide the power supply path into several power supply branches according to the server's processor power and system configuration; S12. Connect the required filter capacitor (less than the capacitor threshold) of each power supply branch directly to the corresponding power supply branch. S13. Connect the capacitors required by each power supply branch that are greater than the capacitor threshold in parallel to form a capacitor bank, and connect the capacitor bank to the corresponding power supply branch through a switching circuit. Then connect the capacitor bank switching circuit to the control logic module.

5. The high power density server power supply system implementation method of claim 4, wherein, The specific steps of step S2 are as follows: S21. Divide the total load into several load branches according to the load type and power; S22. Determine whether the load branch and the power supply branch are directly connected; If so, proceed to step S23; If not, proceed to step S24; S23. Each load branch is directly connected to a power supply branch and is powered by the directly connected power supply branch. Proceed to step S3. S24. Each load branch is connected to the power supply branch through a switching circuit or a switching circuit, and the switching circuit or switching circuit is connected to the control logic module.

6. The method for implementing a high power density server power supply system as described in claim 5, characterized in that, The specific steps of step S37 are as follows: S3711. Before the system is powered on, the control logic module obtains the power supply voltage through the input voltage detection module; S3712. When the power is turned on by the input power, the control logic module determines whether the voltage of the corresponding load branch reaches the set ratio of the voltage threshold through the output voltage detection module of the corresponding load branch. If so, proceed to step S3713; If not, return to step S3712; S3713. The control logic module turns on the corresponding capacitor bank switching circuit for a set proportion of power supply branches based on whether the load branch voltage reaches the voltage threshold, and controls the drive signal of the corresponding capacitor bank switching circuit to increase according to the set step size. S3714. The control logic module determines whether the capacitor bank voltage has reached the capacitor bank voltage threshold. If so, power on is complete, proceed to step S3715; If not, return to step S3713; S3715. When the system needs to be shut down, the control logic module sends a shutdown signal to the capacitor bank switching circuit of each power supply branch in sequence; S3716. The control module sends a command to the power supply to shut down the power; S3717. The control logic module determines whether the system needs to be restarted within a set time period; If so, proceed to step S3718; If not, power-off complete, end; S3718. The control logic module detects the voltage of the capacitor bank voltage detection module of the corresponding power supply branch; S3719. The control logic module sends a power-on signal to the power supply. S3720. The control logic module determines whether the voltage of each load branch is consistent with the voltage of the capacitor bank of the corresponding power supply branch; If so, proceed to step S3721; If not, return to step S3719; S3721. The control logic module sends an enable signal to the capacitor bank switch circuit of the corresponding power supply branch, sets the capacitor bank switch circuit to be connected to the power supply branch according to the set step size, and completes the power-on.

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