Power supply arrangement for a subsea data center

Abstract

This disclosure presents an embodiment of a power supply device for a submarine data center. One specific embodiment of the power supply device includes a pre-stage voltage regulator / conversion component, a post-stage DC-DC converter component, and a combined protection circuit. The pre-stage voltage regulator / conversion component includes several parallel single-group voltage regulator branches, each branch connected in series with a varistor and a color-coded resistor. A thin-film capacitor is connected in parallel to the output terminal of the pre-stage voltage regulator / conversion component. The post-stage DC-DC converter component, electrically connected to the pre-stage voltage regulator / conversion component, includes at least two sets of full-bridge DC synchronous rectifier circuits. The combined protection circuit includes a pre-stage combined protection circuit, a post-stage active voltage clamping circuit connected in parallel to the output side of the post-stage DC-DC converter component, and a rectifier diode bridge connected between the constant current input port and the pre-stage voltage regulator / conversion component. The pre-stage combined protection circuit is connected in series to the input side of the rectifier diode bridge. By connecting multiple voltage regulator branches in parallel and combining them with the combined protection circuit, ripple is reduced. This embodiment can improve the power supply stability of the power supply device.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of power supply technology for submarine data centers, and more specifically to power supply devices for submarine data centers. Background Technology

[0002] With the large-scale construction of seabed data centers, the demand for continuous power supply to deep-sea electronic modules has increased significantly, and power supply equipment is widely used in the power supply scenarios of seabed data centers.

[0003] However, when using commonly used power supply devices, the following technical problems often arise: Currently, commonly used power supply devices have large voltage fluctuations and poor power supply stability.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background of the present disclosure concept, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The summary portion of this disclosure is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description portion. This summary portion is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] Some embodiments of this disclosure provide a power supply device for submarine data centers to address one or more of the technical problems mentioned in the background section above.

[0007] Some embodiments of this disclosure provide a power supply device for a seabed data center. The power supply device includes a pre-stage voltage regulator / conversion component, a post-stage DC-DC converter component, and a combined protection circuit. The pre-stage voltage regulator / conversion component includes a first predetermined number of individual voltage regulator branches, each of which is connected in parallel. Each individual voltage regulator branch includes a second predetermined number of Zener diodes connected in series, and each individual voltage regulator branch is connected in series with a varistor and a color-coded resistor. The pre-stage voltage regulator... A thin-film capacitor is connected in parallel to the output of the conversion component; the output of the aforementioned downstream DC-DC converter is electrically connected to the output of the aforementioned upstream voltage regulator converter; the aforementioned downstream DC-DC converter includes at least two sets of full-bridge DC synchronous rectifier circuits; the aforementioned combined protection circuit includes a upstream combined protection circuit, a downstream active voltage clamping circuit, and a rectifier diode bridge; the aforementioned rectifier diode bridge is connected between the constant current input port and the input of the aforementioned upstream voltage regulator converter; the aforementioned upstream combined protection circuit is connected in series on the input side of the aforementioned rectifier diode bridge, and the aforementioned downstream active voltage clamping circuit is connected in parallel on the output side of the downstream DC-DC converter.

[0008] Optionally, in the above-mentioned pre-stage voltage regulator and converter assembly, the varistor and the color-coded resistor are connected in series, and the series connection and the corresponding single voltage regulator branch form a parallel circuit.

[0009] Optionally, the above-mentioned rectifier diode bridge is a full-bridge rectifier structure composed of Schottky diodes.

[0010] Optionally, the power supply device for the submarine data center further includes an energy storage component; the input terminal of the energy storage component is electrically connected to the output terminal of the front-stage voltage regulator unit, and the output terminal of the energy storage component is electrically connected to the input terminals of each group of full-bridge DC synchronous rectifier circuits of the rear-stage DC converter.

[0011] Optionally, the power supply device for the submarine data center further includes a housing and a base plate; the front-stage voltage regulator, the rear-stage DC-DC converter and the combined protection circuit are all mounted on the base plate; the base plate is located inside the housing.

[0012] Optionally, an alumina ceramic layer is provided on an inner wall surface that contacts the base plate inside the aforementioned housing.

[0013] Optionally, the aforementioned housing is a closed structure, and the interior of the aforementioned housing has been potted with adhesive.

[0014] Some embodiments of this disclosure provide a power supply device for a seabed data center, which can improve the power supply stability of the power supply device. Specifically, the reason for the poor power supply stability of most power supply devices is that the switching topology of commonly used power supply devices relies on PWM modulation for conversion. High-frequency switching generates current ripple, and the deviation is further amplified after multiple stages are connected in series, resulting in poor power supply stability. Based on this, some embodiments of this disclosure provide a power supply device for a seabed data center. The power supply device for a seabed data center includes a front-end voltage regulator conversion component, a rear-end DC-DC conversion component, and a combined protection circuit. The front-end voltage regulator conversion component includes a first preset number of individual voltage regulator branches, wherein each of the individual voltage regulator branches is connected in parallel; each of the individual voltage regulator branches includes a second preset number of series-connected Zener diodes, and each individual voltage regulator branch is connected in series with a varistor and a color-coded resistor; the front-end... A thin-film capacitor is connected in parallel to the output of the voltage regulator component; the output of the aforementioned downstream DC-DC converter is electrically connected to the output of the aforementioned upstream voltage regulator component; the aforementioned downstream DC-DC converter includes at least two sets of full-bridge DC synchronous rectifier circuits; the aforementioned combined protection circuit includes a upstream combined protection circuit, a downstream active voltage clamping circuit, and a rectifier diode bridge; the aforementioned rectifier diode bridge is connected between the constant current input port and the input of the aforementioned upstream voltage regulator component; the aforementioned upstream combined protection circuit is connected in series on the input side of the aforementioned rectifier diode bridge, and the aforementioned downstream active voltage clamping circuit is connected in parallel on the output side of the downstream DC-DC converter. By employing multiple parallel voltage regulator branches with thin-film capacitor regulation, and providing at least two sets of full-bridge rectifier circuits in the downstream stage for hot backup, combined with a combined protection circuit including upstream protection, downstream clamping, and a rectifier bridge, ripple is eliminated and the risk of single-path failure interruption is reduced. This improves the power supply stability of the power supply device. Attached Figure Description

[0015] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and elements are not necessarily drawn to scale.

[0016] Figure 1 These are internal test sample diagrams of power supply devices for submarine data centers according to some embodiments of this disclosure; Figure 2 This is a schematic diagram of the structure of a power supply device for a submarine data center according to some embodiments of this disclosure. Detailed Implementation

[0017] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0018] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0019] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0020] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0021] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0022] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Figure 1 These are internal test sample diagrams of power supply devices for submarine data centers, representing some embodiments of this disclosure. It should be noted that... Figure 1 The image shows the internal state of the power supply device before glue filling and sealing.

[0024] Figure 2 This is a schematic diagram of the structure of a power supply device for a submarine data center according to some embodiments of this disclosure. It should be noted that... Figure 2 The number following a single-group voltage regulator branch is only for distinguishing multiple single-group voltage regulator branches. "N" indicates that there can be multiple single-group voltage regulator branches.

[0025] In some embodiments, the power supply device for a submarine data center described above may include a front-end voltage regulator, a rear-end DC-DC converter, and a combined protection circuit. Reference may be made to... Figure 2The aforementioned pre-stage voltage regulator assembly may include a first preset number of individual voltage regulator branches. Each of these individual voltage regulator branches can be connected in parallel. Each individual voltage regulator branch can be an independent circuit branch on a printed circuit board, using a surface-mount wiring method. Each of these individual voltage regulator branches includes a second preset number of Zener diodes connected in series. These Zener diodes can be Zener diodes. Each individual voltage regulator branch can have a varistor and a color-coded resistor connected in series. The varistor can be a zinc oxide varistor, and the color-coded resistor can be a carbon film color-coded resistor; no specific limitation is made here. The varistor and the color-coded resistor can be connected in series by soldering the leads. The first preset number and the second preset number can be 40 and 4 respectively; no specific limitation is made here, and they can be preset according to actual power supply requirements. For example, when the first preset quantity and the second preset quantity are 40 and 4 respectively, a single voltage regulator branch consists of 4 Zener diodes connected in series; the aforementioned pre-stage voltage regulator conversion component consists of 40 single voltage regulator branches connected in parallel. The aforementioned pre-stage voltage regulator conversion component can utilize the Zener breakdown characteristics of the Zener diodes to convert constant current into constant voltage.

[0026] In some embodiments, a film capacitor may be connected in parallel to the output terminal of the aforementioned pre-stage voltage regulator. The film capacitor may be a metallized polypropylene film capacitor, and no specific limitation is made herein. The film capacitor may be connected to the output terminal of the aforementioned pre-stage voltage regulator via lead soldering. The film capacitor may be used to stabilize the output voltage value of the pre-stage. The aforementioned post-stage DC-DC converter may be electrically connected to the output terminal of the aforementioned pre-stage voltage regulator, and the connection method may be wire soldering or terminal contact, and no specific limitation is made herein. The aforementioned post-stage DC-DC converter may include at least two sets of full-bridge DC synchronous rectifier circuits, and the full-bridge DC synchronous rectifier circuit may include four MOSFETs and a rectifier control chip. The aforementioned post-stage DC-DC converter may receive the stable DC power output from the aforementioned pre-stage voltage regulator, and complete the DC voltage conversion and secondary regulation through the full-bridge DC synchronous rectifier circuit, adapting it to the power supply voltage required by the submarine low-voltage DC equipment. Simultaneously, the at least two sets of full-bridge rectifier circuits form redundancy backup, enabling rapid switching in case of circuit failure and ensuring continuous and stable power output. The aforementioned combined protection circuit may include a pre-stage combined protection circuit, a post-stage active voltage clamping circuit, and a rectifier diode bridge. These three parts can be independent circuit modules, electrically connected via wires. The pre-stage combined protection circuit can be a surge protection circuit; its specific structure is not limited here and can be preset according to actual power supply requirements. The rectifier diode bridge can be connected between the constant current input port of the power supply device and the input terminal of the pre-stage voltage regulator / conversion component. The constant current input port can be a waterproof wiring port for connecting to a submarine constant current power supply line. The pre-stage combined protection circuit can be connected in series on the input side of the rectifier diode bridge, providing pre-circuit protection for the rectifier diode bridge. The post-stage active voltage clamping circuit can be a clamping circuit; its specific structure is not limited here and can be preset according to actual power supply requirements. The post-stage active voltage clamping circuit can be connected in parallel on the output side of the post-stage DC-DC converter component, connected to the low-voltage output port of the power supply device.

[0027] Optionally, in the aforementioned pre-stage voltage regulator and converter assembly, the varistor and the color-coded resistor can be in series, forming a series circuit through pin soldering. Furthermore, this series structure can form a parallel circuit with the corresponding single-group voltage regulator branch. The terminals of this parallel circuit can be connected to the input and output terminals of the corresponding single-group voltage regulator branch, respectively, enabling circuit adaptation for voltage division and current splitting of the single-group voltage regulator branch.

[0028] Optionally, the aforementioned rectifier diode bridge can be a full-bridge rectifier structure composed of Schottky diodes. This full-bridge rectifier structure can consist of four Schottky diodes, with each pair of diodes forming a series branch, and the two series branches then connected in parallel. The aforementioned Schottky diodes can be surface-mount packaged, possessing low on-state voltage drop characteristics, and can meet the rectification requirements of submarine constant current power supply.

[0029] Optionally, the power supply device for the submarine data center described above may further include an energy storage component. This energy storage component can be a supercapacitor module, composed of multiple supercapacitors connected in series or parallel. The input terminal of the energy storage component can be electrically connected to the output terminal of the preceding voltage regulator unit, with the connection point being the positive and negative output terminals of the preceding voltage regulator unit. Furthermore, the output terminal of the energy storage component can be electrically connected to the input terminals of each group of full-bridge DC synchronous rectifier circuits in the subsequent DC-DC converter. Each full-bridge DC synchronous rectifier circuit can have an independent terminal connected to the energy storage component, providing temporary power supplementation to the subsequent circuits.

[0030] Optionally, the power supply device for the subsea data center may further include a housing and a base plate. The base plate may be the circuit board of the power supply device for the subsea data center. The housing may be made of aluminum alloy and may have an overall cuboid structure. The pre-stage voltage regulator, the post-stage DC-DC converter, and the combined protection circuit may all be mounted on the base plate, and the mounting method may be welding. The base plate may be located inside the housing and connected to the inner wall of the housing via a metal bracket.

[0031] Optionally, an alumina ceramic layer may be provided on an inner wall surface inside the aforementioned housing that contacts the aforementioned base plate. The alumina ceramic layer may be a ceramic patch, bonded to the inner wall of the aforementioned housing using a high-temperature resistant insulating adhesive. The alumina ceramic layer provides electrical insulation between the aforementioned base plate and the aforementioned housing. Furthermore, relying on its high-temperature resistance, corrosion resistance, and high hardness, it withstands the temperature rise of the circuit operation, resists corrosive media from the seabed, protects internal circuit components, and enhances the insulation protection capability of the aforementioned power supply device.

[0032] Optionally, the aforementioned housing can be a closed structure, with sealing strips provided at each joint, and the interior of the housing can be potted. The potting process can employ vacuum potting, using epoxy resin as the potting material. The resin layer fills the gaps between components inside the housing, covering the non-soldered areas of each circuit component. Potting secures the internal circuit components of the power supply device, preventing loosening caused by ocean currents. It also enhances electrical insulation between components, aids in circuit heat dissipation, and improves the stability and protection of the power supply device in deep-sea environments. (See reference...) Figure 1 , Figure 1 The image shows the internal state of the power supply device before glue filling and sealing. After glue filling, the remaining space inside the power supply device will be filled with glue.

[0033] In addressing the aforementioned technical challenges in employing technical solutions, the application scenario—submarine distributed edge computing micro-module cluster networking—often presents the following technical problem: power supply interruptions are common in multi-level, multi-electron module cascade networking on the seabed. Considering the following requirements for this application scenario: adapting to low-deviation power supply demands of multi-level, multi-electron module cascade networking on the seabed; adapting to compact installation space; adapting to uninterrupted power supply demands under maintenance-free conditions on the seabed; and adapting to the pressure resistance requirements of the deep-sea hull, we have decided to adopt the following solution: Optionally, each of the third preset number of individual voltage regulator branches in the aforementioned pre-stage voltage regulator conversion component can form a branch group, which can be divided according to the area of ​​the circuit layout. For example, a third preset number of adjacent individual voltage regulator branches can form a branch group. The third preset number can be 4, which is not specifically limited here and can be preset according to the actual application scenario. Each branch group can be connected to a calibration resistor array, and the connection position can be the total output terminal of the branch group. The calibration resistor array can be an integrated passive resistor component, consisting of a manganese copper alloy precision resistor core, an insulating package shell, and metal lead terminals. The manganese copper alloy precision resistor core can be integrated in series or parallel inside the insulating package shell according to a preset resistance value, and the two ends of the core are electrically connected to the external leads of the insulating package shell. The aforementioned calibration resistor array can be connected in series with the output terminals of the branch groups of the aforementioned pre-stage voltage regulator and converter. Utilizing the high-precision resistance characteristics of manganese-copper alloy resistors, it calibrates the output voltage of each branch group, offsetting electrical parameter deviations between different branch groups, improving output consistency, reducing overall deviation in multi-stage series power supply for multiple electronic compartments, and meeting low-deviation power supply requirements. The aforementioned calibration resistor array can be connected in series with the output terminals of the corresponding branch groups, and electrical connection can be achieved through pin soldering. The aforementioned post-stage DC-DC converter can also include a fault self-diagnosis control component. This fault self-diagnosis control component can be a circuit control module based on a microcontroller, and it can be electrically connected to the driver chips of each group of full-bridge DC synchronous rectifier circuits. The connection method can be SPI communication wiring, which is not specifically limited here. The film capacitors connected in parallel at the output terminals of the aforementioned pre-stage voltage regulator and converter can be a graded energy storage array structure. This array structure can be divided into a main energy storage area and a backup buffer area. The main energy storage area can be composed of large-capacity film capacitors, and the backup buffer area can be composed of small-capacity film capacitors. The aforementioned backup buffer zone can be isolated from the main energy storage area via a high-speed thyristor. This high-speed thyristor can be a power thyristor, connected to the connecting branch between the two energy storage areas. Each of the full-bridge DC synchronous rectifier circuits can have a Schottky freewheeling diode array connected in series at its output terminal. This array can consist of a predetermined number of Schottky diodes connected in parallel and soldered to the output terminals of each full-bridge DC synchronous rectifier circuit. The predetermined number can be 3, and is not specifically limited here. This Schottky freewheeling diode array provides a freewheeling path for each full-bridge DC synchronous rectifier circuit, absorbing the reverse induced voltage and current generated when the circuit is turned off, thus reducing the risk of damage to components such as MOSFETs within the circuit. The array configuration improves the overall freewheeling capability and current carrying capacity.The aforementioned power supply device for subsea data centers may further include a gradient wall thickness shell, which can be a one-piece shell made of aluminum alloy. The wall thickness on the water-facing pressure side of the gradient wall thickness shell can be greater than that on the back pressure side. For example, the difference in wall thickness between the water-facing and back pressure sides can be 2-5 mm. The interior of the gradient wall thickness shell may be equipped with a honeycomb-shaped internal support frame. This honeycomb-shaped internal support frame is a frame structure made of aluminum alloy honeycomb panels, fitted to the inner wall of the shell, and can be connected to the circuit board of the aforementioned power supply device for subsea data centers via polytetrafluoroethylene (PTFE) suspended insulating supports. These PTFE suspended insulating supports can be columnar structures made of PTFE, with threaded connection ends at both ends, connecting to the frame and the circuit board respectively.

[0034] The above-described optional embodiments, as an inventive point of this disclosure, solve the technical problem of "easy power interruption in multi-level series-connected network of multiple electronic modules on the seabed". The specific factors leading to easy power interruption in multi-level series-connected network of multiple electronic modules on the seabed are as follows: deviations exist in the output electrical parameters of each voltage-stabilizing branch group; the superposition of these deviations after multi-level series connection causes power imbalance; and the rectifier circuit lacks dedicated freewheeling protection, making it prone to damage to core components such as MOSFETs during shutdown due to reverse induced current. Simultaneously, under the high pressure of the deep sea, poor voltage withstand capability of the outer shell can easily lead to structural deformation, resulting in poor contact in the internal circuitry. Solving these factors can reduce the likelihood of power interruption in multi-level series-connected network of multiple electronic modules on the seabed. To achieve this effect, this disclosure also provides an optimized power supply device structure adapted to the network of distributed edge computing micro-modules on the seabed. On the one hand, the output voltage of each branch group is calibrated by calibrating the resistor array, offsetting parameter deviations and avoiding series power supply imbalance. The graded energy storage film capacitors buffer power supply voltage fluctuations through the main and backup buffers. At the same time, the gradient wall thickness shell, combined with the honeycomb internal support frame, not only meets the high-pressure withstand requirements of deep sea but also adapts to the compact installation space, reducing open circuit failures caused by shell deformation and component loosening. On the other hand, a Schottky freewheeling diode array is used to provide freewheeling protection for the rectifier circuit and absorb reverse induced current. As a result, the occurrence of power supply interruptions in multi-level series-connected networks of multiple electronic modules on the seabed is reduced.

[0035] In addressing the technical challenge of easily interrupted power supply in multi-level, multi-electrode subsea networked systems, the proposed application scenario—distributed edge computing micro-module networking along submarine optical cable relay segments—often presents the following technical issue: short lifespan of the power supply unit. Considering the specific requirements of this application scenario—adaptability to deep-sea current vibrations, broadband electromagnetic interference from the complex underwater electromagnetic environment, and resistance to highly corrosive underwater media—we have decided to adopt the following solution: Optionally, the interior of the aforementioned housing may be provided with a gradient elastic potting layer. The bottom layer of this gradient elastic potting layer may be a silicone potting layer bonded to the circuit board, the middle layer an insulating and voltage-resistant potting layer, and the top layer a polyurethane potting layer. The silicone potting layer in the gradient elastic potting layer offers excellent flexibility and vibration damping, allowing it to buffer ocean current vibrations when bonded to the circuit board. The insulating and voltage-resistant potting layer enhances electrical insulation and isolates interference between circuits. The polyurethane potting layer is corrosion-resistant and high-pressure resistant, resisting deep-sea corrosive media and water pressure. A polyimide buffer film may be provided between the bottom, middle, and top layers of the gradient elastic potting layer. This polyimide buffer film can be a polyimide film with a thickness of 0.1~0.3mm, directly laid at the junctions of the various adhesive layers. This polyimide film can relieve stress in each adhesive layer, reducing the risk of cracking. The Zener diodes and calibration resistor arrays of the aforementioned pre-amplifier voltage regulator and converter components can employ a dual soldering process using both surface mount and metal pins. First, the bottom of the device is surface-mounted onto the pads of the circuit board, and then the device leads are reinforced by secondary soldering to the circuit board using metal pins. The aforementioned PTFE suspended insulating support can contain a spring buffer structure. This spring buffer structure can be a stainless steel miniature spring, housed within the hollow cavity of the insulating support, with both ends connected to threaded connections at both ends of the insulating support. This spring buffer structure can buffer mechanical vibrations from deep-sea currents after the potting layer is damaged or fails, attenuating the impact force of the vibration, reducing the transmission of vibration to the circuit board, and ensuring circuit connection and structural stability. The aforementioned pre-amplifier combined protection circuit can include an electromagnetic filter component. The inductor of this electromagnetic filter component can be a ferrite core, specifically a manganese-zinc ferrite core inductor, and the capacitor can be a monolithic capacitor, specifically a multilayer ceramic monolithic capacitor. The inductor and capacitor can be connected in series to form a filter circuit. The isolation transformer core of the aforementioned downstream DC-DC converter can be covered with a permalloy layer. This permalloy layer can be a thin sheet with a thickness of 0.1-0.2 mm, tightly bonded to the surface of the transformer core. Furthermore, the isolation transformer can be fitted with a shielding cover, which can be a copper shell. This shielding cover can be electrically connected to the grounding terminal of the power supply device via a wire. The shielding cover serves two purposes: firstly, it blocks electromagnetic radiation generated by the isolation transformer itself, reducing interference to other circuit components; secondly, it resists external broadband electromagnetic interference from the complex electromagnetic environment of the seabed, and conducts absorbed electromagnetic interference energy away through the grounding terminal, improving the overall electromagnetic interference immunity of the power supply device. An electromagnetic shielding layer, which can be copper foil, can be bonded to the inner wall of the shell using conductive adhesive. This electromagnetic shielding layer can be electrically connected to the grounding terminal of the power supply device. The surface of the gradient wall thickness shell can undergo a double-layer anti-corrosion treatment of micro-arc oxidation and fluorocarbon coating.Specifically, the outer casing surface can be first subjected to micro-arc oxidation to form a ceramic oxide layer, followed by spraying a fluorocarbon coating for secondary protection. The honeycomb-shaped internal support frame inside the power supply device and each solder joint on the circuit board can undergo dual anti-corrosion treatment with tin plating and passivation. Specifically, a tin layer can be first plated onto the metal surface, followed by chemical passivation to form a protective film. The location where the constant current input port connects to the external cable can be equipped with an anti-corrosion sealing joint. This anti-corrosion sealing joint can be a waterproof brass joint, with an inner layer of nitrile rubber sealing ring and an outer layer of fluororubber sealing ring. Both sealing rings can be annular structures, nested within the connection area of ​​the joint. The gap between the anti-corrosion sealing joint and the gradient wall thickness outer casing can be filled with sealant, which can be a waterproof polyurethane sealant.

[0036] The above-mentioned optional embodiments, as an inventive point of this disclosure, solve the technical problem of "short service life of the power supply device". The specific factors leading to a short service life of the power supply device are as follows: continuous vibration from deep-sea currents can easily cause circuit components to loosen, solder joints to crack, and the adhesive layer to lose its protective function due to stress cracking; broadband electromagnetic interference generated by the distributed edge computing micro-cabin group network in the submarine optical cable relay section can easily intrude into the circuit, causing device malfunctions and failures, affecting the normal operation of the circuit; highly corrosive media on the seabed can easily corrode the shell, solder joints, connection ports, etc., causing component corrosion and sealing failure, while the high-pressure environment will exacerbate the penetration and damage of corrosive media. If the above factors are solved, the service life of the power supply device can be extended. To achieve this effect, this disclosure also provides an integrated anti-corrosion, vibration-resistant, and anti-interference structure for the power supply device adapted to the distributed edge computing micro-cabin group network in the submarine optical cable relay section. On the one hand, a gradient elastic potting layer combined with a polyimide buffer film is used to dissipate vibration stress and prevent the potting layer from cracking. A dual welding process strengthens the solder joint connection, and a spring buffer structure within the insulating support further attenuates ocean current vibrations. This multi-layered vibration reduction and anti-vibration design prevents component loosening and solder joint cracking, ensuring the long-term stability of the device structure. On the other hand, a multi-layered electromagnetic protection system is constructed using electromagnetic filter components, a permalloy layer, a copper shield, and an inner copper foil electromagnetic shield to resist broadband electromagnetic interference. Simultaneously, anti-corrosion sealing protection is achieved through micro-arc oxidation of the outer shell and fluorocarbon coating, blocking the erosion of highly corrosive media. This extends the service life of the power supply device.

[0037] In addressing the aforementioned technical challenges in employing technical solutions, the application scenario—a linear series network of submarine IoT sensing nodes—often presents the following technical problem: the power supply device is susceptible to damage from electromagnetic surges generated by submarine cables. Considering the following requirements for this application scenario—adapting to the instantaneous impact of electromagnetic surges generated by submarine cables, adapting to low-current ripple power supply for submarine low-voltage DC equipment, and adapting to balanced power supply for each node in a multi-module series network on the submarine—we have decided to adopt the following solution: Optionally, the aforementioned pre-stage combined protection circuit may include a gas discharge tube and a surge suppression varistor. The gas discharge tube is made of ceramic, and the surge suppression varistor is made of zinc oxide. The gas discharge tube and the surge suppression varistor can be connected in series, forming a series protection branch through pin soldering. The gas discharge tube can handle high-voltage, high-energy transient surges, rapidly discharging when the voltage reaches the breakdown value, thus diverting the large surge current. The surge suppression varistor can clamp low-to-medium voltage surge spikes, suppressing the surge amplitude and compensating for the slightly slower response of the gas discharge tube. A bidirectional transient voltage suppressor diode can be connected in parallel at the input of the aforementioned rectifier diode bridge. This bidirectional transient voltage suppressor diode can be a TVS diode, and its two ends can be electrically connected to the positive and negative input terminals of the aforementioned rectifier diode bridge, respectively. The aforementioned bidirectional transient voltage suppression diodes can clamp and absorb energy from high-frequency, small-amplitude surge residual voltages, eliminating surge aftershocks and protecting downstream low-voltage circuits. The output of the aforementioned pre-stage voltage regulator can be equipped with a low-ripple filter circuit, which can be a π-type RC filter circuit composed of resistors and capacitors in a π-type structure. This low-ripple filter circuit can filter out ripple, noise, and other interference components in the output current of the aforementioned pre-stage voltage regulator, suppressing current and voltage fluctuations and making the output DC current smoother and more stable. Each output of each group of full-bridge DC synchronous rectifier circuits in the aforementioned downstream DC converter can be equipped with a differential sampling voltage regulation closed-loop control component. This differential sampling voltage regulation closed-loop control component can be a circuit control module with an operational amplifier as its core. This differential sampling voltage regulation closed-loop control component can include a differential sampling resistor, a sampling conditioning circuit, an operational amplifier, a reference voltage source, and a switching controller. The differential sampling resistor is connected in parallel at the output of the rectifier circuit to collect electrical signals. The sampling conditioning circuit filters and amplifies the collected signals before transmitting them to the operational amplifier. The operational amplifier works with the reference voltage source to perform differential comparison. The error output of the operational amplifier is electrically connected to the switch controller. The switch controller can be a PWM controller. The differential sampling voltage regulation closed-loop control component can be configured to control the switch controller to dynamically adjust the switching frequency of the corresponding full-bridge DC synchronous rectifier circuit based on the electrical signals collected by the differential sampling resistor. For example, when the ripple fluctuation value generated based on the collected electrical signals is higher than the preset high-precision power supply ripple threshold of the submarine low-voltage DC equipment, the error adjustment signal output by the operational amplifier can be used to control the switch controller to increase the switching frequency of the corresponding full-bridge DC synchronous rectifier circuit by 10%, filtering out current ripple and suppressing voltage fluctuations, so that the output ripple falls back to the threshold range; when the ripple fluctuation value is within the preset threshold, the switch controller is controlled to maintain the current switching frequency to maintain the smoothness and stability of the power supply.Each differential sampling voltage regulation closed-loop control component can be electrically connected to the corresponding full-bridge DC synchronous rectifier circuit's driver chip. The constant current input port and low-voltage output port of the aforementioned power supply device can both be reverse-connection protected interfaces. These reverse-connection protected interfaces are pluggable interfaces with mechanical keyways for preventing incorrect connections, and can have internal reverse-connection protection springs. The aforementioned power supply device can internally include a series-connected network power supply balancing circuit. This series-connected network power supply balancing circuit can be a passive balancing circuit composed of resistors and capacitors. This series-connected network power supply balancing circuit can be electrically connected to the output terminal of the aforementioned pre-stage voltage regulator and converter component, and is soldered to the total output terminal of the pre-stage voltage regulator and converter component.

[0038] The above-mentioned optional embodiments, as an inventive point of this disclosure, solve the technical problem of "power supply devices being susceptible to damage from electromagnetic surges from submarine cables". The specific factors causing power supply devices to be susceptible to damage from electromagnetic surges from submarine cables are as follows: Electromagnetic surges generated by submarine cables can be of different types, including high voltage and high energy, medium and low voltage spikes, and high-frequency small-amplitude residual voltage. Without layered and coordinated protection measures, it is difficult to resist them comprehensively, and surges can easily intrude into downstream circuits, causing device breakdown; surge impacts can cause a sharp increase in power supply current ripple. Excessive ripple not only affects the operation of low-voltage DC equipment but also exacerbates the load loss of internal components in the power supply device; the power supply of each node in a multi-module series network on the submarine is unbalanced, easily leading to local overvoltage and overcurrent. Under surge impacts, this problem will be amplified, thus causing damage to local circuits of the power supply device. If the above factors are solved, the damage to power supply devices from electromagnetic surges from submarine cables can be reduced. To achieve this effect, this disclosure also provides an integrated structure for surge protection and power supply balancing of power supply devices adapted to linear series networks of submarine IoT sensing nodes. On the one hand, a three-tiered surge protection system is constructed, consisting of a gas discharge tube, a surge suppression varistor, and a bidirectional transient voltage suppression diode. The series-connected gas discharge tube and varistor first resist high-voltage, high-energy surges and clamp low-to-medium voltage spikes, respectively, while the parallel-connected bidirectional transient voltage suppression diode eliminates residual voltage from high-frequency, small-amplitude surges. The three layers of protection work synergistically to block surge intrusion and protect the core circuit components of the power supply device from breakdown and damage. On the other hand, a low-ripple filter circuit initially filters out ripple, and a differential sampling voltage regulation closed-loop control component dynamically adjusts the switching frequency of the rectifier circuit to achieve current and voltage regulation, suppressing ripple exceeding the standard caused by surges and reducing load losses caused by surge-induced superimposed ripple. At the same time, a series-connected network power supply balancing circuit achieves voltage and current balance at each node, reducing local overvoltage and overcurrent problems under surge impact. Thus, the occurrence of damage to the power supply device due to electromagnetic surges from submarine cables is reduced.

[0039] Some embodiments of this disclosure provide a power supply device for a seabed data center, which can improve the power supply stability of the power supply device. Specifically, the reason for the poor power supply stability of most power supply devices is that the switching topology of commonly used power supply devices relies on PWM modulation for conversion. High-frequency switching generates current ripple, and the deviation is further amplified after multiple stages are connected in series, resulting in poor power supply stability. Based on this, some embodiments of this disclosure provide a power supply device for a seabed data center. The power supply device for a seabed data center includes a front-end voltage regulator conversion component, a rear-end DC-DC conversion component, and a combined protection circuit. The front-end voltage regulator conversion component includes a first preset number of individual voltage regulator branches, wherein each of the individual voltage regulator branches is connected in parallel; each of the individual voltage regulator branches includes a second preset number of series-connected Zener diodes, and each individual voltage regulator branch is connected in series with a varistor and a color-coded resistor; the front-end... A thin-film capacitor is connected in parallel to the output of the voltage regulator component; the output of the aforementioned downstream DC-DC converter is electrically connected to the output of the aforementioned upstream voltage regulator component; the aforementioned downstream DC-DC converter includes at least two sets of full-bridge DC synchronous rectifier circuits; the aforementioned combined protection circuit includes a upstream combined protection circuit, a downstream active voltage clamping circuit, and a rectifier diode bridge; the aforementioned rectifier diode bridge is connected between the constant current input port and the input of the aforementioned upstream voltage regulator component; the aforementioned upstream combined protection circuit is connected in series on the input side of the aforementioned rectifier diode bridge, and the aforementioned downstream active voltage clamping circuit is connected in parallel on the output side of the downstream DC-DC converter. By employing multiple parallel voltage regulator branches with thin-film capacitor regulation, and providing at least two sets of full-bridge rectifier circuits in the downstream stage for hot backup, combined with a combined protection circuit including upstream protection, downstream clamping, and a rectifier bridge, ripple is eliminated and the risk of single-path failure interruption is reduced. This improves the power supply stability of the power supply device.

[0040] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A power supply device for a submarine data center, characterized in that, The power supply device includes a front-end voltage regulator, a rear-end DC-DC converter, and a combined protection circuit. The pre-stage voltage regulator conversion component includes a first preset number of individual voltage regulator branches, wherein each of the individual voltage regulator branches is connected in parallel with each other. Each of the individual voltage regulator branches includes a second preset number of voltage regulator diodes connected in series, and each individual voltage regulator branch is connected in series with a varistor and a color-coded resistor. A thin-film capacitor is connected in parallel to the output terminal of the pre-stage voltage regulator component; The output terminal of the downstream DC-DC converter is electrically connected to the output terminal of the upstream voltage regulator converter. The downstream DC-DC conversion assembly includes at least two sets of full-bridge DC synchronous rectifier circuits. The combined protection circuit includes a front-stage combined protection circuit, a rear-stage active voltage clamping circuit, and a rectifier diode bridge. The rectifier diode bridge is connected between the constant current input port and the input terminal of the pre-stage voltage regulator component; The front-stage combined protection circuit is connected in series on the input side of the rectifier diode bridge, and the rear-stage active voltage clamping circuit is connected in parallel on the output side of the rear-stage DC-DC converter.

2. The power supply device for a submarine data center according to claim 1, characterized in that, In the pre-stage voltage regulator and converter assembly, the varistor and the color-coded resistor are connected in series, and the series connection forms a parallel circuit with the corresponding single voltage regulator branch.

3. The power supply device for a submarine data center according to claim 1, characterized in that, The rectifier diode bridge is a full-bridge rectifier structure composed of Schottky diodes.

4. The power supply device for a submarine data center according to claim 1, characterized in that, The power supply device for the submarine data center also includes energy storage components; The input terminal of the energy storage component is electrically connected to the output terminal of the front-stage voltage regulator unit, and the output terminal of the energy storage component is electrically connected to the input terminals of each group of full-bridge DC synchronous rectifier circuits of the rear-stage DC converter component.

5. The power supply device for a submarine data center according to claim 1, characterized in that, The power supply unit for the submarine data center also includes a casing and a base plate; The pre-stage voltage regulator and converter, the post-stage DC-DC converter, and the combined protection circuit are all mounted on the base plate. The base plate is located inside the outer casing.

6. The power supply device for a submarine data center according to claim 5, characterized in that, Inside the outer casing, an alumina ceramic layer is provided on one of the inner wall surfaces that contacts the base plate.

7. The power supply device for a submarine data center according to claim 5, characterized in that, The outer shell is a closed structure, and the interior of the outer shell has been potted with glue.

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