Vehicle-mounted server power supply circuit and device

Abstract

The utility model discloses a vehicle-mounted server power supply circuit and device, and the circuit comprises a power input circuit, a voltage conversion circuit, and a switch control circuit, and the power input circuit is used for receiving an external DC voltage; the voltage conversion circuit comprises a first power supply module, a second power supply module and a third power supply module, the input ends of the power supply modules are electrically connected with the output end of the power supply input circuit, and the voltage conversion circuit is used for converting a direct-current voltage transmitted by the power supply input circuit into a first working voltage, a second working voltage and a third working voltage; the switch control circuit is configured to be used for controlling conduction between the first working voltage, the second working voltage and the third working voltage and the vehicle-mounted server based on a startup signal transmitted by the vehicle-mounted server. According to the design, the energy consumption of the vehicle-mounted power supply system can be effectively reduced, and meanwhile, the mode that an inverter is used for converting a direct-current power supply provided by a vehicle-mounted system into alternating-current voltage and then supplying power to a vehicle-mounted server is eliminated, so that the installation space in a vehicle is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, in particular to a vehicle-mounted server power supply circuit and device. BACKGROUND

[0002] The existing general server usually adopts two power supply modes of AC220V or DC48V, and the power supply design of the server is also based on these two power supply forms. However, in the field of ruggedized vehicle-mounted servers, due to the power supply characteristics of the vehicle-mounted environment, DC24V power supply is usually adopted, and the voltage range is between DC18V and 31V. This power supply range limits the design and adaptation of the optional power supply. In the prior art, in order to adapt to the vehicle-mounted power supply, a conventional server power supply is usually used after the DC24V is converted into AC220V through an inverter.

[0003] However, this method has many defects: first, the inverter process will cause the energy conversion efficiency to be reduced, and the energy consumption of the vehicle-mounted power supply system will be increased; second, due to the large size of the high-power inverter, it is not suitable for the use environment of limited space in the vehicle, and it is difficult to meet the needs of miniaturization and efficient power supply of the vehicle-mounted server.

[0004] Therefore, how to design an adaptive and efficient power supply scheme for the vehicle-mounted power supply environment has become a technical problem to be solved. CONTENT OF THE INVENTION

[0005] In order to solve the technical defects proposed in the background art, the present application provides a vehicle-mounted server power supply circuit and device, which can effectively reduce the energy consumption of the vehicle-mounted power supply system, and at the same time, since it is free from the method of using an inverter to convert the direct current power supply provided by the vehicle-mounted system into alternating voltage and then supplying power to the vehicle-mounted server, the installation space in the vehicle is saved.

[0006] The utility model adopts the following technical scheme:

[0007] In a first aspect, the present application provides a vehicle-mounted server power supply circuit, comprising:

[0008] A power input circuit for receiving an external direct current voltage;

[0009] A voltage conversion circuit, the voltage conversion circuit comprising a first power module, a second power module and a third power module, the input ends of the first power module, the second power module and the third power module are electrically connected with the output end of the power input circuit, for converting the direct current voltage delivered by the power input circuit into a first working voltage, a second working voltage and a third working voltage; wherein the second power module is further used to provide standby voltage for the vehicle-mounted server;

[0010] A switch control circuit, input ends of the switch control circuit are electrically connected with output ends of the first power module, the second power module and the third power module respectively; wherein, the switch control circuit is configured to control conduction between the first working voltage, the second working voltage, the third working voltage and the vehicle-mounted server based on a start-up signal delivered by the vehicle-mounted server.

[0011] Optionally, the switch control circuit comprises:

[0012] A first switch module having a first voltage input end, a first voltage output end and a first enable end, the first voltage input end is electrically connected with the output end of the first power module, the first voltage output end is electrically connected with the vehicle-mounted server, and the first enable end is configured to receive the start-up signal sent by the vehicle-mounted server to control conduction between the first working voltage and the vehicle-mounted server;

[0013] A second switch module having a second voltage input end, a second voltage output end and a second enable end, the second voltage input end is electrically connected with the output end of the second power module, the second voltage output end is electrically connected with the vehicle-mounted server, the second enable end is electrically connected with the first voltage output end, and the second enable end is configured to control conduction between the second working voltage and the vehicle-mounted server based on the input of the first working voltage;

[0014] A third switch module having a third voltage input end, a third voltage output end and a third enable end, the third voltage input end is electrically connected with the output end of the third power module, the third voltage output end is electrically connected with the vehicle-mounted server, the third enable end is electrically connected with the first voltage output end, and the third enable end is configured to control conduction between the third working voltage and the vehicle-mounted server based on the input of the first working voltage.

[0015] Optionally, further comprising a power supply signal feedback circuit, an output end of the power supply signal feedback circuit is electrically connected with the third voltage output end, and the power supply signal feedback circuit is configured to receive the third voltage and generate a feedback signal to the vehicle-mounted server when the third switch module delivers the third voltage to the vehicle-mounted server.

[0016] Optionally, the first switch module comprises:

[0017] A first switch tube, a gate of the first switch tube is electrically connected with the vehicle-mounted server, a source of the first switch tube is grounded, and the first switch tube is configured to receive the start-up signal sent by the vehicle-mounted server;

[0018] A second switch tube, a gate of the second switch tube is electrically connected with the source of the first switch tube, and a source of the second switch tube is grounded.

[0019] A current-limiting resistor, an input end of the current-limiting resistor being electrically connected with a drain of the second switch tube;

[0020] A third switch tube, a gate of the third switch tube being electrically connected with an output end of the current-limiting resistor, a source of the third switch tube being electrically connected with an output end of the first power supply module, and a drain of the third switch tube being electrically connected with the vehicle-mounted server; when the first switch tube receives a power-on signal of the vehicle-mounted server, the first switch tube is turned on, the second switch tube is turned on, and the third switch tube is turned on to supply power to the vehicle-mounted server.

[0021] Optionally, the second switch module comprises:

[0022] A fourth switch tube, a gate of the fourth switch tube being electrically connected with a drain of the third switch tube, a drain of the fourth switch tube being electrically connected with an output end of the second power supply module, and a source of the fourth switch tube being electrically connected with the vehicle-mounted server;

[0023] A first pull-up resistor, the pull-up resistor being electrically connected between the first voltage output end and the gate of the fourth switch tube;

[0024] A first filter unit, an input end of the first filter unit being electrically connected with the source of the fourth switch tube, and an output end of the first filter unit being grounded.

[0025] Optionally, the third switch module comprises:

[0026] A fifth switch tube, a gate of the fifth switch tube being electrically connected with the source of the third switch tube, a drain of the fifth switch tube being electrically connected with the output end of the second power supply module, and a source of the fifth switch tube being electrically connected with the vehicle-mounted server;

[0027] A second pull-up resistor, the second pull-up resistor being electrically connected between the first voltage output end and the gate of the fifth switch tube;

[0028] A second filter unit, an input end of the second filter unit being electrically connected with the source of the fifth switch tube, and an output end of the second filter unit being grounded.

[0029] Optionally, the switch control circuit further comprises a fourth switch module, the fourth switch module comprising:

[0030] A sixth switch tube, a gate of the sixth switch tube being electrically connected with the first voltage output end, and a source of the sixth switch tube being grounded;

[0031] A seventh switch tube, a gate of the seventh switch tube is electrically connected with a drain of the sixth switch tube, a source of the seventh switch tube is electrically connected with an output end of the first power module, and a drain of the seventh switch tube is electrically connected with an external device of the vehicle-mounted server.

[0032] Optionally, the first power module comprises a first voltage conversion chip, and the first voltage conversion chip is used for converting the direct-current voltage delivered by the power input circuit into a first working voltage.

[0033] The second power module comprises a second voltage conversion chip, and the second voltage conversion chip is used for converting the direct-current voltage delivered by the power input circuit into a second working voltage.

[0034] The third power module comprises a third voltage conversion chip, and the third voltage conversion chip is used for converting the direct-current voltage delivered by the power input circuit into a third working voltage.

[0035] Optionally, the power input circuit comprises:

[0036] A direct-current input port, the direct-current input port is electrically connected with an external device direct-current power supply;

[0037] A third filtering unit, an input end of the third filtering unit is electrically connected with an output end of the direct-current input port;

[0038] An eighth switch tube, a drain of the eighth switch tube is electrically connected with an output end of the third filtering unit, and a source of the eighth switch outputs a filtered direct-current voltage.

[0039] In a second aspect, the application provides a vehicle-mounted server power supply device, comprising the vehicle-mounted server power supply circuit in the first aspect; and

[0040] A circuit board, and the vehicle-mounted server power supply circuit is engraved on the circuit board.

[0041] In summary, the vehicle-mounted server power supply circuit has the following advantages:

[0042] By setting the power input circuit, voltage conversion circuit and switch control circuit, efficient conversion from the vehicle-mounted DC power supply to the first working voltage, the second working voltage and the third working voltage is realized, without the traditional inverter to convert the DC power into AC power for power supply, directly adapting to the power supply range of the vehicle-mounted server. At the same time, the energy conversion efficiency is significantly improved, the energy consumption of the intermediate inverter link is reduced, and the circuit volume is reduced, meeting the needs of the vehicle-mounted server for miniaturization and efficient power supply, saving the internal space of the vehicle installation. At the same time, the second power module provides a dedicated standby voltage, supports the low-power mode operation of the vehicle-mounted server, further optimizes the overall energy consumption performance of the power supply system, and makes it more suitable for use in a space-limited rugged vehicle-mounted environment. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0044] Figure 1 is a vehicle-mounted server power supply circuit architecture diagram of the utility model embodiment;

[0045] Figure 2 is a schematic diagram of the voltage conversion circuit of the utility model embodiment;

[0046] Figure 3 is a schematic diagram of the electric signal feedback circuit of the utility model embodiment;

[0047] Figure 4 is a schematic diagram of the first switch module of the utility model embodiment;

[0048] Figure 5 is a schematic diagram of the second switch module of the utility model embodiment;

[0049] Figure 6 is a schematic diagram of the third switch module of the utility model embodiment;

[0050] Figure 7 is a schematic diagram of the fourth switch module of the utility model embodiment;

[0051] Figure 8 is a schematic diagram of the power input circuit of the utility model embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0053] 100, power input circuit;101, third filter unit;Q1, eighth switch tube;

[0054] 200, voltage conversion circuit; 201, first power module; 202, second power module; 203, third power module; U1, first voltage conversion chip; U2, second voltage conversion chip; U3, third voltage conversion chip;

[0055] 300, switch control circuit; 301, first switch module; Q3, first switch tube; Q7, second switch tube; R16, current limiting resistor; Q6, third switch tube; 302, second switch module; Q2, fourth switch tube; R5, first pull-up resistor; 304, first filter unit; 303, third switch module; Q9, fifth switch tube; R19, second pull-up resistor; 305, second filter unit;

[0056] 400, fourth switch module; Q10, sixth switch tube; Q8, seventh switch tube;

[0057] 500, electric signal feedback circuit; U5, clock control chip. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0059] As shown in Figures 1-8 The present application provides a vehicle-mounted server power supply circuit, which comprises a power input circuit 100, a voltage conversion circuit 200 and a switch control circuit 300. The power input circuit 100 is used for receiving an external direct current voltage. The voltage conversion circuit 200 comprises a first power module 201, a second power module 202 and a third power module 203. The input ends of the first power module 201, the second power module 202 and the third power module 203 are electrically connected to the output end of the power input circuit 100, respectively, for converting the direct current voltage delivered by the power input circuit 100 into a first working voltage, a second working voltage and a third working voltage. The second power module 202 is further used for providing a standby voltage for the vehicle-mounted server. The input end of the switch control circuit 300 is electrically connected to the output end of each of the first power module 201, the second power module 202 and the third power module 203. The switch control circuit 300 is configured to control the conduction between the first working voltage, the second working voltage and the third working voltage and the vehicle-mounted server based on a power-on signal delivered by the vehicle-mounted server.

[0060] As shown in Figure 1 and Figure 8As shown, in the embodiment of the present application, the power input circuit 100 is used to receive external DC voltage, and can be connected to automobile battery, vehicle power supply system or external DC power module. In the power input circuit 100, multiple stages of filtering and voltage stabilization can be provided to effectively suppress electromagnetic interference and power fluctuation, and output stable DC voltage to provide reliable power supply support for the vehicle server. It can meet the operation requirements of high-power servers and improve the electromagnetic compatibility and environmental interference resistance of the equipment. By setting the power input circuit 100, it has high reliability and adaptability, and can provide stable power supply of about 500W for the server in a complex vehicle environment, protect the load equipment and prolong the service life. The above-mentioned voltage conversion circuit 200 includes a first power module 201, a second power module 202 and a third power module 203, and the input ends of each module are electrically connected with the power input circuit 100. The input DC voltage is converted to provide different working voltages for the vehicle server. The first power module 201 outputs a first working voltage, which can be 12V. A 1 / 2 brick standard size power module can be selected to support a power range of 150W-600W, meeting the high-power operation requirements of the vehicle server. The second power module 202 not only provides a second working voltage for the vehicle server, which can be 5V, but also selects a 1 / 4 brick standard size power module to support a power range of 75W-200W. The second working voltage is also responsible for the output of standby voltage (directly connected to the vehicle server to provide standby voltage), which provides support for the continuous operation of the vehicle server in low-power mode. The third power module 203 outputs a third working voltage, which can be 3.3V, and also selects a 1 / 4 brick standard size power module to drive other auxiliary function modules or low-power subsystems of the vehicle server. The entire circuit can be designed through the above-mentioned three voltage output, which can support the server power supply requirements in the range of 300W-1000W, ensuring that the vehicle server can obtain stable power supply in different working states, and at the same time has high efficient power management capability. It realizes efficient utilization of input power, supports stable operation in multi-task environment, and the introduction of standby function further improves the energy efficiency of the vehicle power supply system, reduces the energy consumption of the vehicle power supply system. Compared with the traditional DC-AC inverter mode, it can effectively reduce the energy consumption. It should be understood that the conversion efficiency of the traditional power supply through the inverter is about 80%, while the conversion efficiency of the power supply through the embodiment of the present application can reach 93% under the full load condition of the vehicle server, which greatly improves the conversion efficiency and reduces the energy consumption of the vehicle power supply system.The input ends of the switch control circuit 300 are connected with the output ends of the first power module 201, the second power module 202 and the third power module 203 respectively, and the core function thereof is to receive the start-up signal sent by the vehicle-mounted server based on the start-up demand of the vehicle-mounted server, and accurately control the conduction state between the first working voltage, the second working voltage and the third working voltage and the server load in turn. The switch control circuit 300 makes the energy consumption lower than the traditional way, and through the control of the switch control circuit 300 on the on-off state between the first power module 201, the second power module 202, the third power module 203 and the vehicle-mounted server, the switch control circuit 300 can also provide an efficient and flexible power management solution for complex vehicle-mounted application scenarios.

[0061] Further, as shown in Figures 2-5 The switch control circuit 300 includes a first switch module 301, a second switch module 302 and a third switch module 303. The first switch module 301 has a first voltage input end, a first voltage output end and a first enable end. The first voltage input end is electrically connected with the output end of the first power module 201, the first voltage output end is electrically connected with the vehicle-mounted server, and the first enable end is used to receive the start-up signal sent by the vehicle-mounted server to control the conduction between the first working voltage and the vehicle-mounted server. The second switch module 302 has a second voltage input end, a second voltage output end and a second enable end. The second voltage input end is electrically connected with the output end of the second power module 202, the second voltage output end is electrically connected with the vehicle-mounted server, and the second enable end is electrically connected with the first voltage output end. The second enable end is used to control the conduction between the second working voltage and the vehicle-mounted server based on the input of the first working voltage. The third switch module 303 has a third voltage input end, a third voltage output end and a third enable end. The third voltage input end is electrically connected with the output end of the third power module 203, the third voltage output end is electrically connected with the vehicle-mounted server, and the third enable end is electrically connected with the first voltage output end. The third enable end is used to control the conduction between the third working voltage and the vehicle-mounted server based on the input of the first working voltage.

[0062] In the embodiment of the present application, the switch control circuit 300 is composed of the first switch module 301, the second switch module 302 and the third switch module 303, and the efficient management of the power supply of the vehicle-mounted server is realized through hierarchical logic control. The first voltage input end of the first switch module 301 is electrically connected to the output end of the first power module 201, the first voltage output end is connected to the vehicle-mounted server, the first working voltage is provided for the vehicle-mounted server, the first enable end receives the power-on signal of the vehicle-mounted server, and after receiving the power-on signal of the vehicle-mounted server, the conduction between the first working voltage and the vehicle-mounted server is enabled, that is, the power-on signal is used as the enable signal of the first switch module 301. The second voltage input end of the second switch module 302 is electrically connected to the output end of the second power module 202, the second voltage output end is electrically connected to the vehicle-mounted server, and the second enable end is connected to the first voltage output end, so that the conduction is enabled when the first working voltage is detected, thereby controlling the electrical connection between the second working voltage and the vehicle-mounted server. The third voltage input end of the third switch module 303 is electrically connected to the output end of the third power module 203, the third voltage output end is electrically connected to the vehicle-mounted server, and the third enable end is electrically connected to the first voltage output end, so that the conduction between the third working voltage and the vehicle-mounted server is realized based on the input of the first working voltage. That is, the power-on signal first activates the first switch module 301, and then simultaneously triggers the conduction of the second switch module 302 and the third switch module 303, that is, after the first working voltage is enabled, the second working voltage and the third working voltage are simultaneously triggered, wherein the first working voltage can be 12V, the second working voltage can be 5V, and the third working voltage can be 3.3V. Through the above-mentioned hierarchical power supply control of the three-voltage system and the logic linkage design through the enable end, the timing correctness and stability in the power supply process are ensured, the conflict between the power modules is avoided, the running efficiency of the vehicle-mounted server is improved, and the flexible management of the standby voltage is supported. It should be noted that the second power module 202 directly provides the standby voltage for the vehicle-mounted server, and the standby voltage is 5V. By directly dividing a path from the second power module 202 to the vehicle-mounted server, the vehicle-mounted server can obtain the standby voltage, so as to provide sufficient voltage to send the power-on signal to the first switch module 201 when receiving the power-on instruction. Through the above design, the power consumption and running safety of the system can be effectively optimized, and the application requirements of complex vehicle-mounted environments can be adapted.

[0063] Optionally, as shown in Figure 3 the embodiment of the present application further includes a power supply signal feedback circuit 500, the input end of the power supply signal feedback circuit 500 is electrically connected to the output end of the third switch module 303, and the power supply signal feedback circuit 500 is used to receive the third working voltage and generate a feedback signal to the vehicle-mounted server when the third switch module 303 delivers the third working voltage to the vehicle-mounted server.

[0064] In the embodiment, the power supply signal feedback circuit 500 includes a voltage dividing resistor R11, a clock control chip U5, and a pull-down resistor R12. The input end of the voltage dividing resistor R11 is electrically connected to the output end of the third switch module 303, the output end of the voltage dividing resistor R11 is electrically connected to the 3 pin of the clock control chip U5, the 2 pin of the clock control chip U5 is electrically connected to the vehicle-mounted server, and the model of the clock control chip U5 can be MIC811 SUY. When the output end of the third switch module 303 stably outputs a 3.3V voltage, the clock control chip U5 generates a high-level signal and transmits the high-level signal to the vehicle-mounted server through the 2 pin, so as to provide a feedback signal to the vehicle-mounted server. The pull-down resistor R12 is arranged between the clock control chip U5 and the vehicle-mounted server, so as to ensure that the 2 pin of the clock control chip U5 outputs a low level when not activated.

[0065] The clock control chip U5 is arranged to monitor the third working voltage in real time, so as to ensure that the server operates under stable voltage conditions and avoid system abnormalities caused by unstable voltage. Meanwhile, the reset and delay functions provide a further protection mechanism to effectively ensure circuit stability when the power supply is transiently changed or the system is restarted. Through the linkage of the feedback signal and the vehicle-mounted server, the overall power management efficiency of the vehicle-mounted power supply system is improved, the energy conversion efficiency is improved, and the energy consumption of the vehicle-mounted power supply system is reduced.

[0066] Further, as shown in FIG. 3, the first switch module 301 includes a first switch tube Q3, a second switch tube Q7, a current limiting resistor R16, and a third switch tube Q6. Figure 4 The gate of the first switch tube Q3 is electrically connected to the vehicle-mounted server, the source of the first switch tube Q3 is grounded, and the first switch tube Q3 is used to receive a power-on signal sent by the vehicle-mounted server. The gate of the second switch tube Q7 is electrically connected to the source of the first switch tube Q3, and the source of the second switch tube Q7 is grounded. The input end of the current limiting resistor R16 is electrically connected to the drain of the second switch tube Q7. The gate of the third switch tube Q6 is electrically connected to the output end of the current limiting resistor R16, the source of the third switch tube Q6 is electrically connected to the output end of the first power supply module 201, and the drain of the third switch tube Q6 is electrically connected to the vehicle-mounted server. When the first switch tube Q3 receives the power-on signal of the vehicle-mounted server, the first switch tube Q3 is turned on, the second switch tube Q7 is turned on, and the third switch tube Q6 is turned on to supply power to the vehicle-mounted server.

[0067] In an embodiment of the present application, the first switch module 301 manages the 12V voltage of the vehicle server based on multi-stage switch control, wherein the first switch tube Q3, the second switch tube Q7, and the third switch tube Q6 cooperate with each other to achieve stable power supply control by step-by-step conduction. When the vehicle server sends a power-on signal, the gate of the first switch tube Q3 receives the signal, the first switch tube Q3 is turned on, and its source is grounded. After turning on, the signal is transmitted to the gate of the second switch tube Q7. The gate of the second switch tube Q7 is connected to the source of the first switch tube Q3 and is controlled by the conduction of the first switch tube Q3. Subsequently, the second switch tube Q7 is turned on, its source is grounded, and the drain is connected to the control path through the current-limiting resistor R16. The input end of the current-limiting resistor R16 is connected to the drain of the second switch tube Q7, which performs current limiting and protection functions, and its output end is connected to the gate of the third switch tube Q6. As the second switch Q7 turns on, the voltage at the output of the current-limiting resistor R16 decreases, causing the gate voltage of the third switch Q6 to drop to near ground, turning on the third switch Q6. The source of the third switch Q6 is connected to the output of the first power module, and the drain is connected to the onboard server, providing it with a 12V main power supply. At the power output, the circuit is also equipped with filter elements, filter capacitors C31 and C32, which are used to decouple high-frequency and low-frequency noise, respectively, to ensure a stable output voltage. The entire signal flow begins with the first switch Q3 receiving the power-on signal from the onboard server, and is transmitted step by step through the second switch Q7 and current-limiting resistor R16, ultimately controlling the conduction state of the third switch Q6 to achieve a stable 12V output. The cascade design of the first and second switches Q3 and Q7 avoids the high current surges that can occur when directly controlling the main power switch. The current-limiting resistor R16 provides protection for the main switch, ensuring a smooth switching process. The design of the third switch tube Q6 ensures the high-power handling capability of the power supply path. At the same time, the filter capacitors C31 and C32 further improve the stability and quality of the power supply, which is particularly suitable for application scenarios with high requirements for power management in automotive environments.

[0068] Further, such as Figure 5 As shown, the second switch module 302 includes a fourth switch transistor Q2, a first pull-up resistor R5, and a first filtering unit 304. The gate of the fourth switch transistor Q2 is electrically connected to the drain of the third switch transistor Q6, the drain of the fourth switch transistor Q2 is electrically connected to the output terminal VCC5SB of the second power module 202, and the source of the fourth switch transistor Q2 is electrically connected to the power supply terminal of the vehicle server. The first pull-up resistor R5 is electrically connected between the second voltage output terminal VCC12 and the gate of the fourth switch transistor Q2. The input terminal of the first filtering unit 304 is electrically connected to the source of the fourth switch transistor Q2, and the output terminal of the first filtering unit 304 is grounded.

[0069] In the embodiment of the present application, the gate of the fourth switch tube Q2 is electrically connected with the drain of the third switch tube Q6 in the first switch module 301. When the third switch tube Q6 is turned on, the signal is transmitted to the gate of the fourth switch tube Q2 to control it to be turned on. The drain of the fourth switch tube Q2 is connected to the output end of the second power module 202, and the source is connected to the power supply end of the vehicle-mounted server to provide the output voltage of the second power module 202 for the server. The first pull-up resistor R5 is connected between the VCC12 port and the gate of the fourth switch tube Q2 to ensure that the fourth switch tube Q2 is in the off state when the control signal is invalid, avoiding false triggering. The first filter unit is composed of filter capacitors C10 and C11, the input end is connected to the source of the fourth switch tube Q2, and the output end is grounded, which is used to suppress voltage ripple and stabilize the output 5V voltage to the vehicle-mounted server. The first pull-up resistor R5 stabilizes the gate potential of the fourth switch tube Q2, avoids false triggering when the control signal is not input, and ensures the reliability of the circuit; the fourth switch tube Q2 realizes voltage control and conduction from the second power module 202 to the vehicle-mounted server, and provides efficient power management for the server; the first filter unit is composed of filter capacitors C10 and C11, which effectively suppresses high-frequency noise and low-frequency ripple, improves the quality of the output voltage VCC5, and ensures the stable power supply of the vehicle-mounted server under complex working conditions. At the same time, the module design can be linked with the first switch module 301 in front stage, which can further realize continuous power supply in complex power supply environment, and improve the stability of power supply.

[0070] Further, as shown in Figure 6 The third switch module 303 includes a fifth switch tube Q9, a second pull-up resistor R19 and a second filter unit 305 (composed of filter capacitors C30 and C29 in the figure). The gate of the fifth switch tube Q9 is electrically connected with the source of the third switch tube Q6 (i.e. directly connected to the first working voltage), the drain of the fifth switch tube Q9 is electrically connected with the output end of the second power module 202, and the source of the fifth switch tube Q9 is electrically connected with the vehicle-mounted server. The second pull-up resistor R19 is electrically connected between the first voltage output end (VCC12 in the figure) and the gate of the fourth switch tube Q2. The input end of the second filter unit 305 is electrically connected with the source of the fifth switch tube Q9, and the output end of the second filter unit 305 is grounded.

[0071] In the application embodiment, the third switch module 303 includes a fifth switch tube Q9, a second pull-up resistor R19, and a second filter unit (composed of filter capacitors C30 and C29). The gate of the fifth switch tube Q9 is electrically connected to the source of the third switch tube Q6 in the first switch module 301. When the third switch tube Q6 is turned on, a signal is transmitted to the gate of the fifth switch tube Q9 to control the conduction of the fifth switch tube Q9. The drain of the fifth switch tube Q9 is connected to the output end of the third power module 203, and the source is connected to the vehicle-mounted server to provide a stable voltage output for the vehicle-mounted server. The first end of the second pull-up resistor R19 is connected between the first voltage output end and the gate of the fifth switch tube Q9 to ensure that the gate of the fifth switch tube Q9 maintains a high level when the control signal is invalid, preventing false triggering and further improving the stability of the circuit. The second filter unit is composed of a filter capacitor C30 and a filter capacitor C29, with the input end connected to the source of the fifth switch tube Q9 and the output end grounded. The filter capacitor C30 is mainly used to suppress low-frequency ripple, and the filter capacitor C29 is used to filter high-frequency noise. The combination of the two achieves efficient filtering of the third working voltage VCC3_3 output voltage, ensuring the stability and smoothness of the voltage signal. When the control signal is transmitted from the third switch tube Q6 to the fifth switch tube Q9, the fifth switch tube Q9 is turned on, and the third voltage output by the third power module is transmitted to the vehicle-mounted server through the drain-source path, while the second filter unit further suppresses the output voltage ripple and filters the noise. The introduction of the second pull-up resistor R19 avoids false triggering when the control signal is invalid; the second filter unit C30 and C29 effectively improve the output voltage quality, suppress the ripple and noise, and ensure the smooth output; at the same time, the third power module output (third voltage output end) also provides voltage to the power feedback circuit 500, and then after the first switch module 301, the second switch module 302, and the third switch module 303 normally supply power to the vehicle-mounted server, the delay circuit sends a feedback signal to the vehicle-mounted server at this time.

[0072] Optionally, as shown in Figure 7 the fourth switch module 400 includes a sixth switch tube Q10 and a seventh switch tube Q8. The gate of the sixth switch tube Q10 is electrically connected to the first voltage output end, and the source of the sixth switch tube Q10 is grounded. The gate of the seventh switch tube Q8 is electrically connected to the drain of the sixth switch tube Q10, the source of the seventh switch tube Q8 is electrically connected to the output end of the first power module 201, and the drain of the seventh switch tube Q8 is electrically connected to the external device of the vehicle-mounted server.

[0073] In the embodiment of the present application, the gate of the sixth switch tube Q10 is electrically connected with the first voltage output end of the first switch module 301, and receives the control signal of the first working voltage. When the first working voltage output is valid, the sixth switch tube Q10 is turned on, the source thereof is grounded, and the potential of the drain thereof is lowered to provide a driving signal for the seventh switch tube Q8. The gate of the seventh switch tube Q8 is electrically connected with the drain of the sixth switch tube Q10. When the sixth switch tube Q10 is turned on, the gate voltage of the seventh switch tube Q8 is lowered to trigger the turn-on of the seventh switch tube Q8. The source of the seventh switch tube Q8 is connected with the output end of the first power module, and the drain thereof is connected with the external device voltage input end VCC12_GPU of the vehicle-mounted server to provide 12V voltage for the external device. In order to further optimize the performance of the circuit, a voltage dividing resistor network and a filtering element are further arranged in the circuit. The resistor R20 and the resistor R21 constitute a voltage dividing network, which is used for stabilizing and adjusting the gate voltage of the seventh switch tube Q8 to avoid the misoperation caused by voltage fluctuation. The filtering capacitor C33 is connected between the gate of the seventh switch tube Q8 and the ground, which is used for filtering high-frequency noise to ensure the stability of the control signal. The output end is provided with the filtering capacitor CE10, which is used for decoupling and ripple suppression of the output voltage to ensure that the external device of the vehicle-mounted server obtains high-quality power supply. The fourth switch module mainly controls the first working voltage output by the first power module to supply power to the power-consuming devices in the vehicle-mounted server, such as a graphics card, a CPU and the like.

[0074] Optionally, as shown in Figure 2 The first power module includes a first voltage conversion chip U1, which is used for converting the direct current voltage delivered by the power input circuit 100 into a first working voltage. The second power module 202 includes a second voltage conversion chip U3, which is used for converting the direct current voltage delivered by the power input circuit 100 into a second working voltage. The third power module includes a third voltage conversion chip U4, which is used for converting the direct current voltage delivered by the power input circuit 100 into a third working voltage.

[0075] In the embodiments of the present application, the first power module includes a first voltage conversion chip U1, the input end of which is connected to the DC voltage of the power input circuit 100, and the DC voltage is converted into a first working voltage through the internal voltage conversion mechanism, and the output provides a power of up to 500W, meeting the needs of high-load devices. The first voltage conversion chip U1 eliminates high-frequency noise in the input voltage through the filter capacitor C1 at the input end, and the output end further smoothens the output voltage through the filter network (bit number: CE1, C2 and C3 in the figure), ensuring stable 12V output. The second power module 202 includes a second voltage conversion chip U3, the input end of which is also connected to the DC voltage of the power input circuit 100, and is responsible for converting it into a second working voltage, which can be used for power supply of medium-power devices. The second voltage conversion chip U3 filters the input signal through the input filter capacitor C9, and the output end suppresses high-frequency and low-frequency noise of the output voltage through the filter capacitor (bit number: CE7, C12 and C13 in the figure), ensuring stable output and providing a maximum output power of 150W for the load, suitable for devices with smaller power requirements. The third power module includes a third voltage conversion chip U4, the input end of which is also connected to the DC voltage of the power input circuit 100, for converting it into a third working voltage. The third voltage conversion chip U4 is equipped with a filter capacitor C14 at the input end to improve the stability of the input voltage, and further reduces the output ripple and noise through the filter capacitor (bit number: CE8, C15 and C16 in the figure) at the output end, providing a maximum output power of 100W for the load, suitable for low-power devices. Through independent voltage conversion chips (first voltage conversion chip U1, second voltage conversion chip U3 and third voltage conversion chip U4), the input DC voltage can be efficiently converted into multiple working voltages of different levels, meeting the needs of various loads; the filter design further enhances the quality of power supply, reduces ripple and noise; the modular design makes each power module independent of each other, improving the stability and reliability of the overall power system, and is suitable for complex and variable power supply demand scenarios in the vehicle-mounted environment.

[0076] Optionally, as Figure 8As shown, the power input circuit 100 includes a DC input port DC_IN_P2 and DC_IN_N2, a third filter unit 101, and an eighth switch tube Q1, wherein the DC input port DC_IN_P2 and DC_IN_N2 are electrically connected with an external device DC power supply; the input end of the third filter unit 101 is electrically connected with the output end of the DC input port, the third filter unit 101 is composed of filter capacitors C5 and C6, and common mode inductors L1 and L2, and is used for filtering high-frequency noise and suppressing common mode interference; the drain of the eighth switch tube Q1 is electrically connected with the output end of the third filter unit 101, the gate of the eighth switch tube Q1 is connected with an input signal through voltage dividing resistors R1 and R3, and is provided with a filter capacitor C4 for suppressing high-frequency interference; and the source of the eighth switch tube Q1 outputs a filtered DC voltage. Meanwhile, the output end is provided with filter capacitors CE3 and CE4 for further filtering high-frequency and low-frequency noise, and ensuring the stability of the output voltage.

[0077] In the embodiment of the present application, the DC input ports DC_IN_P2 and DC_IN_N2 are respectively connected with the positive and negative poles of an external DC power supply, and provide DC input voltages IN+ and IN- for the circuit. The input voltage is first filtered by the third filter unit 101, wherein the filter capacitors C5 and C6 are responsible for filtering high-frequency noise, the common mode inductors L1 and L2 are used for suppressing common mode interference, and the quality and electromagnetic compatibility of the input signal are improved. The DC voltage filtered by the third filter unit 101 is transmitted to the drain of the eighth switch tube Q1, the eighth switch tube Q1 is a high-power MOSFET, the gate of the eighth switch tube Q1 is connected with an input signal through voltage dividing resistors R1 and R3, and is provided with a filter capacitor C4 for suppressing high-frequency interference, and ensuring the stable conduction of the switch tube. When the gate voltage reaches the turn-on threshold, the eighth switch tube Q1 is turned on, the input voltage is transmitted to the output end VIN+ through the drain-source path of Q1, and a DC voltage processed by the switch tube is provided. Meanwhile, filter capacitors CE3 and CE4 are provided for filtering high-frequency and low-frequency noise of the DC voltage through Q1, and ensuring the stability of the output voltage. The processed output voltage can provide a load with a power of up to 500W, a voltage of 18V, and a current of 28A.

[0078] In a second aspect, the embodiment of the present application provides a vehicle-mounted server power supply device (not shown in the figure), which comprises the vehicle-mounted server power supply circuit and a circuit board, and the vehicle-mounted server power supply circuit is engraved on the circuit board. By arranging the vehicle-mounted server power supply device, the energy consumption of the vehicle-mounted power supply system can be effectively reduced, and the installation space in the vehicle is saved because the vehicle-mounted server is powered by using an inverter to convert the DC power supply provided by the vehicle-mounted system into an AC voltage.

[0079] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0080] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An in-vehicle server power supply circuit, characterized by comprising: The application relates to a power supply circuit for a vehicle-mounted server, comprising: a power input circuit for receiving an external direct-current voltage; a voltage conversion circuit, the voltage conversion circuit comprising a first power module, a second power module and a third power module, the input ends of the first power module, the second power module and the third power module are electrically connected with the output end of the power input circuit, and the voltage conversion circuit is used for converting the direct-current voltage delivered by the power input circuit into a first working voltage, a second working voltage and a third working voltage; wherein the second power module is further used for providing a standby voltage for the vehicle-mounted server; a switch control circuit, the input ends of the switch control circuit are electrically connected with the output ends of the first power module, the second power module and the third power module respectively; wherein the switch control circuit is configured to control the conduction between the first working voltage, the second working voltage, the third working voltage and the vehicle-mounted server based on the boot signal delivered by the vehicle-mounted server.

2. The vehicle server power supply circuit of claim 1, wherein, The switch control circuit comprises: a first switch module, having a first voltage input end, a first voltage output end and a first enable end, the first voltage input end is electrically connected with the output end of the first power module, the first voltage output end is electrically connected with the vehicle-mounted server, and the first enable end is used for receiving the input of the boot signal sent by the vehicle-mounted server to control the conduction between the first working voltage and the vehicle-mounted server; a second switch module, having a second voltage input end, a second voltage output end and a second enable end, the second voltage input end is electrically connected with the output end of the second power module, the second voltage output end is electrically connected with the vehicle-mounted server, the second enable end is electrically connected with the first voltage output end, and the second enable end is used for controlling the conduction between the second working voltage and the vehicle-mounted server based on the input of the first working voltage; a third switch module, having a third voltage input end, a third voltage output end and a third enable end, the third voltage input end is electrically connected with the output end of the third power module, the third voltage output end is electrically connected with the vehicle-mounted server, the third enable end is electrically connected with the first voltage output end, and the third enable end is used for controlling the conduction between the third working voltage and the vehicle-mounted server based on the input of the first working voltage.

3. The in-vehicle server power supply circuit according to claim 2, wherein Further comprising a power supply signal feedback circuit, the output end of the power supply signal feedback circuit is electrically connected with the third voltage output end, and the power supply signal feedback circuit is used for receiving the third voltage and generating a feedback signal to be delivered to the vehicle-mounted server when the third switch module delivers the third voltage to the vehicle-mounted server.

4. The vehicle-mounted server power supply circuit according to claim 2, wherein: The first switch module comprises: a first switch tube, the gate of the first switch tube is electrically connected with the vehicle-mounted server, the source of the first switch tube is grounded, and the first switch tube is used for receiving the boot signal sent by the vehicle-mounted server; a second switch tube, the gate of the second switch tube is electrically connected with the source of the first switch tube, and the source of the second switch tube is grounded; a current-limiting resistor, the input end of the current-limiting resistor is electrically connected with the drain of the second switch tube. A third switch tube, a gate of the third switch tube is electrically connected with an output end of the current-limiting resistor, a source of the third switch tube is electrically connected with an output end of the first power module, and a drain of the third switch tube is electrically connected with the vehicle-mounted server; wherein, when the first switch tube receives a start-up signal of the vehicle-mounted server, the first switch tube is turned on to make the second switch tube turned on, and the second switch tube is turned on to make the third switch tube turned on to supply power to the vehicle-mounted server.

5. The in-vehicle server power supply circuit according to claim 4, wherein The second switch module comprises: A fourth switch tube, a gate of the fourth switch tube is electrically connected with a drain of the third switch tube, a drain of the fourth switch tube is electrically connected with an output end of the second power module, and a source of the fourth switch tube is electrically connected with the vehicle-mounted server; A first pull-up resistor, the pull-up resistor is electrically connected between the first voltage output end and the gate of the fourth switch tube; A first filter unit, an input end of the first filter unit is electrically connected with the source of the fourth switch tube, and an output end of the first filter unit is grounded.

6. The in-vehicle server power supply circuit according to claim 5, wherein The third switch module comprises: A fifth switch tube, a gate of the fifth switch tube is electrically connected with the source of the third switch tube, a drain of the fifth switch tube is electrically connected with the output end of the second power module, and a source of the fifth switch tube is electrically connected with the vehicle-mounted server; A second pull-up resistor, the second pull-up resistor is electrically connected between the first voltage output end and the gate of the fifth switch tube; A second filter unit, an input end of the second filter unit is electrically connected with the source of the fifth switch tube, and an output end of the second filter unit is grounded.

7. The in-vehicle server power supply circuit according to claim 4, wherein The switch control circuit further comprises a fourth switch module, and the fourth switch module comprises: A sixth switch tube, a gate of the sixth switch tube is electrically connected with the first voltage output end, and a source of the sixth switch tube is grounded; A seventh switch tube, a gate of the seventh switch tube is electrically connected with a drain of the sixth switch tube, a source of the seventh switch tube is electrically connected with the output end of the first power module, and a drain of the seventh switch tube is electrically connected with an external device of the vehicle-mounted server.

8. The vehicle-mounted server power supply circuit of claim 1, wherein The first power module comprises a first voltage conversion chip, and the first voltage conversion chip is used to convert a direct-current voltage delivered by the power input circuit into a first working voltage; The second power module comprises a second voltage conversion chip, and the second voltage conversion chip is used to convert a direct-current voltage delivered by the power input circuit into a second working voltage; The third power module comprises a third voltage conversion chip, and the third voltage conversion chip is used to convert a direct-current voltage delivered by the power input circuit into a third working voltage.

9. The vehicle server power supply circuit of claim 1, wherein: The power input circuit comprises: A direct-current input port, the direct-current input port is electrically connected with an external device direct-current power supply; A third filter unit, an input end of the third filter unit is electrically connected with an output end of the direct-current input port; An eighth switch tube, a drain of the eighth switch tube is electrically connected with an output end of the third filter unit, and a source of the eighth switch outputs a filtered direct current voltage.

10. An in-vehicle server power supply device characterized by comprising: The vehicle-mounted server power supply circuit comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a seventh switch tube, and an eighth switch tube. And A circuit board, the vehicle-mounted server power supply circuit is engraved on the circuit board.

Images