Data center energy-saving power supply system

Abstract

The embodiment of the invention discloses an energy-saving power supply system for a data center, and the system comprises a commercial power supply module which is used for obtaining the electric energy of commercial power; the generator power supply module is used for generating power and outputting electric energy; the switching module is used for switching the conduction of the commercial power supply module and the data center load system into the conduction of the generator power supply module and the data center load system when receiving the commercial power loss signal; in a generator starting maintenance stage, a generator power supply module and an energy storage and power utilization system are conducted; the direct charging module is used for storing electric energy generated by the generator power supply module; and the indirect charging module is used for converting the electric energy generated by the generator power supply module into heat energy for primary storage, and then generating power according to the primary storage heat energy for secondary storage. The problem that electric energy is wasted in the generator maintenance stage is solved, and the purpose of saving energy is achieved by collecting the electric energy generated by the generator power supply module in daily maintenance and using the electric energy in production and life scenes.

Description

Technical Field

[0001] The embodiments of the present invention relate to equipment power supply technology, and in particular to an energy-saving power supply system for a data center. Background Art

[0002] Diesel generators are a common backup power source in data centers, taking over the data center load in the event of a utility power failure or a planned power outage. Campus-level data centers often utilize multiple diesel generators in parallel to provide output power. As a backup power source, diesel generator systems operate in standby mode most of the time. However, they must be started monthly or at specified times to check overall operation. A dummy load is also used to verify the generator's load capacity and consume the generated energy.

[0003] During the inspection of the backup power supply's operating status, the power generated by the generator is wasted, and the dummy load also requires mechanical heat dissipation, which further consumes power. In this process, energy utilization is low, resulting in a certain degree of waste of energy resources. Summary of the Invention

[0004] The present invention provides an energy-saving power supply system for a data center, which solves the problem of electric energy wasting during the generator maintenance phase. The electric energy generated by the generator power supply module during daily maintenance is collected and used in production and living scenarios, thereby achieving the purpose of energy saving.

[0005] An embodiment of the present invention provides an energy-saving power supply system for a data center, comprising:

[0006] Mains power supply module, used to obtain mains power;

[0007] Generator power supply module, used to generate and output electrical energy;

[0008] A switching module includes a first input end, a second input end, a first output end, and a second output end; the first input end is connected to the mains power supply module, the second input end is connected to the generator power supply module, and the first output end is used to connect to the data center load system; the switching module is used to switch the first input end and the first output end from being connected to each other to the second input end and the first output end from being connected to each other when receiving a mains power failure signal;

[0009] An energy storage and power consumption system includes a direct charging module and an indirect charging module, both of which are connected to the second output terminal of the switching module; the switching module is used to connect the second input terminal and the second output terminal of the switching module during the generator startup and maintenance phase;

[0010] The direct charging module is used to store the electric energy generated by the generator power supply module when the second input terminal and the second output terminal of the switching module are connected;

[0011] The indirect charging module is used to convert the electrical energy generated by the generator power supply module into thermal energy for primary storage when the second input end and the second output end of the switching module are connected, and then generate electricity for secondary storage based on the primary stored thermal energy.

[0012] Optionally, the direct charging module includes a transformer, a first charger, and a first battery pack; the transformer and the first charger are sequentially connected in series between the second output terminal of the switching module and the first battery pack;

[0013] The transformer is used to step down the voltage generated by the generator power supply module to the rated voltage of the first charger;

[0014] The first charger is used to charge the first battery pack according to the rated voltage formed by the voltage step-down of the transformer.

[0015] Optionally, the indirect charging module includes a phase change energy storage device, a thermoelectric power generation device, a second charger, and a second battery pack; the phase change energy storage device, the thermoelectric power generation device, and the second charger are sequentially connected in series between the second output terminal of the switching module and the second battery pack;

[0016] The phase change energy storage device is used to convert at most part of the electrical energy generated by the generator power supply module into thermal energy, and perform primary storage of the thermal energy through a phase change process;

[0017] The thermoelectric power generation device is used to generate an electromotive force according to the thermoelectric effect through the temperature difference formed by the phase change process of the phase change energy storage device;

[0018] The second charger is used to charge the second battery pack according to the electromotive force generated by the thermoelectric power generation device.

[0019] Optionally, the phase-change energy storage device includes a phase-change material and a heating wire, the heating wire is disposed in the phase-change material, and the heating wire is electrically connected to the second output end of the switching module.

[0020] Optionally, the phase change material includes molten salt.

[0021] Optionally, the thermoelectric power generation device includes a semiconductor thermoelectric structure, a hot electrode and a cold electrode;

[0022] The hot electrode and the cold electrode are respectively connected to the semiconductor thermoelectric structure, the hot electrode is arranged in the phase change material, and the cold electrode is arranged in an outdoor environment;

[0023] The semiconductor thermoelectric structure is used to generate an electromotive force when there is a temperature difference between the hot electrode and the cold electrode.

[0024] Optionally, the thermoelectric power generation device includes a plurality of the thermoelectric poles, and the phase change energy storage device includes a plurality of the heating wires, and the plurality of heating wires and the plurality of thermoelectric poles are alternately arranged in the phase change material.

[0025] Optionally, the first battery pack is reused as the second battery pack.

[0026] Optionally, the switching module includes a first switch, and the first switch is a single-pole single-throw switch;

[0027] The first contact of the first switch is connected to the mains power supply module as the first input end of the switching module;

[0028] The second contact of the first switch serves as the first output end of the switching module, and is used to connect to the data center load system.

[0029] Optionally, the switching module includes a second switch; the second switch is a single-pole double-throw switch;

[0030] The movable contact of the second switch is connected to the generator power supply module as the second input end of the switching module;

[0031] The first static contact of the second switch serves as the first output end of the switching module, and is used to connect to the data center load system;

[0032] The second static contact of the second switch serves as the second output end of the switching module and is connected to the energy storage and power consumption system.

[0033] An embodiment of the present invention provides an energy-saving power supply system for a data center. Under normal circumstances, the mains power supply module supplies power to the data center load system. When the mains power supply module loses power, the generator power supply module, under the action of the switching module, supplies power to the data center load system. During the maintenance phase of the generator power supply module, the switching module connects the generator power supply module to the energy storage and power consumption system. The direct charging module directly receives and stores the electrical energy generated by the generator power supply module, and the indirect charging module consumes and stores additional power. The energy storage and power consumption system then collects the electrical energy generated by the generator power supply module during routine maintenance and uses it in production and living scenarios, thereby achieving energy conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural diagram of an energy-saving power supply system for a data center provided by an embodiment of the present invention;

[0035] Figure 2 This is a schematic structural diagram of another energy-saving power supply system for a data center provided by an embodiment of the present invention;

[0036] Figure 3 yes Figure 2 Schematic diagram of the structure of the phase change energy storage device and the thermoelectric power generation device;

[0037] Figure 4 This is a structural diagram of another energy-saving power supply system for a data center provided by an embodiment of the present invention;

[0038] In the picture:

[0039] 10- Mains power supply module;

[0040] 20-Generator power supply module;

[0041] 30 - switching module; 31 - first input terminal; 32 - second input terminal; 33 - first output terminal; 34 - second output terminal; 35 - first switch; 36 - second switch;

[0042] 40 - Energy storage and power consumption system; 41 - Direct charging module; 411 - Transformer; 412 - First charger; 413 - First battery pack; 42 - Indirect charging module; 421 - Phase change energy storage device; 4211 - Phase change material; 4212 - Heating wire; 422 - Thermoelectric power generation device; 4221 - Semiconductor thermoelectric structure; 4222 - Hot electrode; 4223 - Cold electrode; 423 - Second charger; 424 - Second battery pack;

[0043] 50-Data center and load system;

[0044] 60-Household electricity module. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0046] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present invention are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is formed "on" or "under" another element, it can not only be formed directly "on" or "under" another element, but can also be formed indirectly "on" or "under" another element through an intermediate element. The terms "first", "second", etc. are only used for descriptive purposes and do not indicate any order, quantity or importance, but are only used to distinguish different components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The term "including" and its variations used in the present invention are open inclusions, that is, "including but not limited to." The term "based on" means "based at least in part on." The term "one embodiment" means "at least one embodiment."

[0048] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish the corresponding contents, and are not used to limit the order or mutual dependence.

[0049] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0050] Figure 1 This is a schematic diagram of the structure of an energy-saving power supply system for a data center provided by an embodiment of the present invention; Figure 1 The energy-saving power supply system of the data center includes a mains power supply module 10, a generator power supply module 20, a switching module 30 and an energy storage and power consumption system 40. Among them, the mains power supply module 10 is used to obtain mains power. The generator power supply module 20 is used to generate and output electric energy. The switching module 30 includes a first input terminal 31, a second input terminal 32, a first output terminal 33 and a second output terminal 34; the first input terminal 31 is connected to the mains power supply module 10, the second input terminal 32 is connected to the generator power supply module 20, and the first output terminal 33 is used to connect to the data center load system 50; the switching module 30 is used to switch the first input terminal 31 and the first output terminal 33 to the second input terminal 32 and the first output terminal 33 when receiving a mains power failure signal.

[0051] The energy storage and power consumption system 40 includes a direct charging module 41 and an indirect charging module 42, both of which are connected to the second output terminal 34 of the switching module 30. The switching module 30 is configured to connect the second input terminal 32 of the switching module 30 to the second output terminal 34 during the generator startup and maintenance phase. The direct charging module 41 is configured to store the electrical energy generated by the generator power supply module 20 when the second input terminal 32 and the second output terminal 34 of the switching module 30 are connected. The indirect charging module 42 is configured to convert the electrical energy generated by the generator power supply module 20 into thermal energy for primary storage when the second input terminal 32 and the second output terminal 34 of the switching module 30 are connected. This indirect charging module 42 is configured to convert the electrical energy generated by the generator power supply module 20 into thermal energy for primary storage, and then generate electricity for secondary storage based on the thermal energy stored in the primary storage.

[0052] It is understandable that the function of the energy-saving power supply system for a data center provided in an embodiment of the present invention is to supply power to a data center load system 50, wherein the data center load system 50 includes power-consuming equipment such as servers and switches. The embodiment of the present invention provides two power supply modules, namely a mains power supply module 10 and a generator power supply module 20, wherein the mains power supply module 10 serves as the main power supply, and the data center load system 50 obtains mains power through an electrical connection; the generator power supply module 20 serves as an auxiliary power supply, and is used to generate and output electrical energy only when the mains power supply module 10 loses power. The main component of the generator power supply module 20 can be a diesel generator set composed of multiple diesel generators, which is not limited in the embodiment of the present invention.

[0053] The switching between the AC power supply module 10 and the generator power supply module 20 is achieved through the switching module 30. The switching module 30 includes a first input terminal 31, a second input terminal 32, a first output terminal 33, and a second output terminal 34. The first input terminal 31 is connected to the AC power supply module 10, the second input terminal 32 is connected to the generator power supply module 20, and the first output terminal 33 is used to connect to the data center load system 50. Under normal circumstances, the first input terminal 31 and the first output terminal 33 are connected, that is, the AC power supply module 10 supplies power to the data center load system 50; when the AC power supply module 10 loses power, under the action of the switching module 30, the second input terminal 32 and the first output terminal 33 are connected, that is, the generator power supply module 20 supplies power to the data center load system 50.

[0054] It should be noted that data centers typically include power monitoring devices and / or power metering devices that can monitor key parameters of the mains power supply in real time to determine whether a power outage or anomaly has occurred. Key monitoring features include voltage and frequency detection, phase loss and interruption detection, and harmonic and waveform distortion detection. This automated monitoring system monitors the mains power status in real time. When the monitoring system receives a power failure signal from the mains power supply module 10, the switching module 30 switches the connection between the first input terminal 31 and the first output terminal 33 to a connection between the second input terminal 32 and the first output terminal 33. At this point, the generator power supply module 20 generates and outputs electrical energy, ensuring normal power supply to the data center.

[0055] It is understood that the generator power supply module 20, as an auxiliary power supply, is in standby mode most of the time. However, it is necessary to start the generator power supply module 20 monthly or at a specified time to check the overall operating status. At this time, the second input terminal 32 of the switching module 30 will be connected to the second output terminal 34, and the generator power supply module 20 will supply power to the energy storage and power consumption system 40. The energy storage and power consumption system 40 can collect and store the electricity generated by the generator power supply module 20 during daily maintenance and use it in production and daily life scenarios.

[0056] The energy storage and power consumption system 40 includes a direct charging module 41 and an indirect charging module 42. These modules are connected in parallel and are both connected to the second output terminal 34 of the switching module 30. During the generator startup and maintenance phase, the direct charging module 41 and the indirect charging module 42 operate simultaneously. The direct charging module 41 directly receives and stores the electrical energy generated by the generator power supply module 20, without requiring intermediate energy conversion. However, since the direct charging module 41 cannot control the charging power, the power generated by the generator power supply module 20 may exceed the rated power of the first charger 412. The indirect charging module 42 is used to consume and store the excess power. The electrical energy generated by the generator power supply module 20 is converted into heat energy for primary storage, and then generated from the stored heat energy for secondary storage. The direct charging module 41 and the indirect charging module 42 work together to power the household power module 60, which can be used for lighting equipment.

[0057] An embodiment of the present invention provides an energy-saving power supply system for a data center. Under normal circumstances, the mains power supply module supplies power to the data center load system. When the mains power supply module loses power, the generator power supply module, under the action of the switching module, supplies power to the data center load system. During the maintenance phase of the generator power supply module, the switching module connects the generator power supply module to the energy storage and power consumption system. The direct charging module directly receives and stores the electrical energy generated by the generator power supply module, and the indirect charging module consumes and stores additional power. The energy storage and power consumption system then collects the electrical energy generated by the generator power supply module during routine maintenance and uses it in production and living scenarios, thereby achieving energy conservation.

[0058] Optional, continue to refer to Figure 1 The switching module 30 includes a first switch 35, which is a single-pole single-throw switch; the first contact of the first switch 35 serves as the first input end 31 of the switching module 30 and is connected to the AC power supply module 10; the second contact of the first switch 35 serves as the first output end 33 of the switching module 30, and is used to connect to the data center load system 50.

[0059] In most cases, the first switch 35 is in a closed state, that is, the first contact of the first switch 35 and the second contact of the first switch 35 are connected, and the AC power supply module 10 supplies power to the data center load system 50 .

[0060] Optional, continue to refer to Figure 1 The switching module 30 includes a second switch 36; the second switch 36 is a single-pole double-throw switch; the moving contact of the second switch 36 serves as the second input end 32 of the switching module 30 and is connected to the generator power supply module 20; the first static contact of the second switch 36 serves as the first output end 33 of the switching module 30, for connecting to the data center load system 50; the second static contact of the second switch 36 serves as the second output end 34 of the switching module 30, and is connected to the energy storage and power consumption system 40.

[0061] Among them, when the monitoring system receives a power failure signal from the AC power supply module 10, the moving contact of the second switch 36 and the first static contact of the second switch 36 are connected, and the generator power supply module 20 supplies power to the data center load system 50; when the overall operating status of the generator power supply module 20 needs to be checked, the moving contact of the second switch 36 and the second static contact of the second switch 36 are connected, and the generator power supply module 20 supplies power to the energy storage and power consumption system 40.

[0062] Figure 2 This is a schematic diagram of another energy-saving power supply system for a data center provided by an embodiment of the present invention. Figure 2Optionally, in another embodiment of the present invention, the direct charging module 41 includes a transformer 411, a first charger 412, and a first battery pack 413. The transformer 411 and the first charger 412 are sequentially connected in series between the second output terminal 34 of the switching module 30 and the first battery pack 413. The transformer 411 is used to step down the voltage generated by the generator power supply module 20 to the rated voltage of the first charger 412. The first charger 412 is used to charge the first battery pack 413 at the rated voltage generated by the step-down voltage of the transformer 411.

[0063] Among them, the generator power supply module 20 can specifically be a diesel generator, which can be a low-voltage generator or a high-voltage generator, and its power generation voltage can reach thousands of volts or even tens of thousands of volts. The transformer 411 uses electromagnetic induction to reduce the high voltage output by the generator power supply module 20 to the rated input voltage required by the first charger 412, such as 220V. After inputting this voltage into the first charger 412, the first charger 412 can charge the first battery pack 413 according to the rated power by controlling the current according to the rated voltage formed by the voltage reduction by the transformer 411.

[0064] Optional, continue to refer to Figure 2 The indirect charging module 42 includes a phase-change energy storage device 421, a thermoelectric power generation device 422, a second charger 423, and a second battery pack 424. The phase-change energy storage device 421, the thermoelectric power generation device 422, and the second charger 423 are sequentially connected in series between the second output terminal 34 of the switching module 30 and the second battery pack 424. The phase-change energy storage device 421 is used to convert at most a portion of the electrical energy generated by the generator power supply module 20 into thermal energy and perform primary storage of the thermal energy through a phase change process. The thermoelectric power generation device 422 is used to generate an electromotive force based on the thermoelectric effect through the temperature difference formed by the phase change process of the phase-change energy storage device 421. The second charger 423 is used to charge the second battery pack 424 according to the electromotive force generated by the thermoelectric power generation device 422.

[0065] It is understandable that due to the limited charging power of the first charger 412, an indirect charging module 42 is connected in parallel to the direct charging module 41. Since the second charger 423 has a rated voltage, the second charger 423 charges the second battery pack 424 according to the rated current. In other words, the second charger 423 has a rated charging power, but the power of the generator power supply module 20 may be higher than the rated power of the second charger 423. For example, the power of the generator power supply module 20 may be 100kW, and the power of the transformer 411 may be 50kW. The excess power is transmitted to the indirect charging module 42. The indirect charging module 42 stores electrical energy through the phase change energy storage device 421, bears the excess power, converts this part of the electrical energy into heat energy, and uses the thermoelectric power generation device 422 to convert the heat energy back into electrical energy. After the electric energy is input into the second charger 423, the first charger 423 is used to charge the second battery pack 424 according to the electromotive force generated by the thermoelectric power generation device 422. The indirect charging module 42 has the advantages of long life, low maintenance, and strong environmental adaptability, and is suitable for long-cycle energy storage scenarios.

[0066] Figure 3 yes Figure 2 Schematic diagram of the structure of the phase change energy storage device and the thermoelectric power generation device, refer to Figure 3 Optionally, in another embodiment of the present invention, the phase change energy storage device 421 includes a phase change material 4211 and a heating wire 4212 , the heating wire 4212 is disposed in the phase change material 4211 , and the heating wire 4212 is electrically connected to the second output end 34 of the switching module 30 .

[0067] The phase change energy storage device 421 includes a phase change material 4211 and a heating wire 4212, which is disposed within the phase change material 4211. Phase change material 4211 is a material that efficiently stores and releases thermal energy through physical phase changes. The physical phase change can be a solid-liquid phase change, a liquid-gas phase change, or a solid-solid phase change. Its core principle is to utilize the latent heat associated with the phase change process to absorb or release energy, while the temperature of the material itself remains nearly constant during the phase change. In this embodiment, the phase change material 4211 is stored in an insulated enclosure. The heating wire 4212 generates heat, which in turn causes the phase change material 4211 within it to undergo a solid-liquid phase change under electrical heating. This absorbs a large amount of latent heat, converting the electrical energy generated by the generator power supply module 20 into thermal energy for stable storage. When energy needs to be released, the phase change material 4211 solidifies and releases heat, which is then converted back into electrical energy through the thermoelectric power generation device 422, achieving long-term, low-loss electrical energy storage.

[0068] Optionally, the phase change material 4211 includes molten salt.

[0069] Among them, the phase change material 4211 includes molten salt. During the phase change process of the molten salt, efficient energy storage can be achieved through high latent heat energy storage, and the operating temperature range is wide, suitable for medium and high temperature scenarios. It has stable chemical properties, is non-flammable, has low vapor pressure, is highly safe and has a long service life. In addition, the raw materials of the molten salt (such as nitrates and carbonates) are abundant in source and low in cost, and are both economical and environmentally friendly, and are particularly suitable for large-scale, long-term stable energy storage needs.

[0070] Optional, continue to refer to Figure 3 The thermoelectric power generation device 422 includes a semiconductor thermoelectric structure 4221, a hot pole 4222 and a cold pole 4223; the hot pole 4222 and the cold pole 4223 are respectively connected to the semiconductor thermoelectric structure 4221, the hot pole 4222 is arranged in the phase change material 4211, and the cold pole 4223 is arranged in the outdoor environment; the semiconductor thermoelectric structure 4221 is used to generate an electromotive force when there is a temperature difference between the hot pole 4222 and the cold pole 4223.

[0071] Among them, the hot pole 4222 of the thermoelectric power generation device 422 is arranged in the phase change material 4211, and the cold pole 4223 is arranged in the outdoor environment; the phase change material 4211 transfers the released heat to the hot pole 4222, and the cold pole 4223 uses the outdoor environment to dissipate heat to form a low-temperature end. The semiconductor thermoelectric structure 4221 stimulates carrier migration under the action of the temperature difference between the hot and cold ends, so that charge separation occurs at both ends of the semiconductor and an electromotive force is formed, thereby realizing the conversion of thermal energy into electrical energy. Through the combination of continuous heat supply of the phase change material 4211 and natural heat dissipation, a stable temperature difference field can be constructed to ensure long-term and efficient power generation.

[0072] Optional, continue to refer to Figure 3 The thermoelectric power generation device 422 includes a plurality of thermocouples 4222 , and the phase change energy storage device 421 includes a plurality of heating wires 4212 . The plurality of heating wires 4212 and the plurality of thermocouples 4222 are alternately arranged in the phase change material 4211 .

[0073] Among them, multiple heating wires 4212 and multiple hot poles 4222 are alternately arranged in the phase change material 4211. The heating wires 4212 serve as heat sources, and the hot poles 4222 serve as heat conduction media. The alternating distribution enables the phase change material 4211 to form a multi-directional heat flow path during the melting process, thereby avoiding local overheating, ensuring the synchronization of the phase change process, and improving the uniformity of energy storage and release. The high thermal conductivity of the hot poles 4222 can quickly conduct the heat generated by the heating wires 4212, and combined with the distributed heating of the heating wires 4212, it can significantly improve the energy transmission efficiency.

[0074] Figure 4 This is a structural diagram of another data center energy-saving power supply system provided by an embodiment of the present invention, referring to Figure 4Optionally, in another embodiment of the present invention, the first battery pack 413 is reused as the second battery pack 424.

[0075] It can be understood that the functions of the first battery group 413 of the direct power supply module 41 and the second battery group 424 of the indirect power supply module 42 are both used for energy storage and to provide electrical energy to the life power module 60. Therefore, reusing the first battery group 413 as the second battery group 424 is conducive to simplifying the system architecture, reducing hardware costs and improving energy utilization.

[0076] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A data center energy-saving power supply system, characterized in that: include: Mains power supply module, used to obtain mains power; Generator power supply module, used to generate and output electrical energy; A switching module includes a first input end, a second input end, a first output end, and a second output end; the first input end is connected to the mains power supply module, the second input end is connected to the generator power supply module, and the first output end is used to connect to the data center load system; the switching module is used to switch the first input end and the first output end from being connected to each other to the second input end and the first output end from being connected to each other when receiving a mains power failure signal; An energy storage and power consumption system includes a direct charging module and an indirect charging module, both of which are connected to the second output terminal of the switching module; the switching module is used to connect the second input terminal and the second output terminal of the switching module during the generator startup and maintenance phase; The direct charging module is used to store the electric energy generated by the generator power supply module when the second input terminal and the second output terminal of the switching module are connected; The indirect charging module is used to convert the electrical energy generated by the generator power supply module into thermal energy for primary storage when the second input end and the second output end of the switching module are connected, and then generate electricity for secondary storage based on the primary stored thermal energy.

2. The energy-saving power supply system according to claim 1, characterized in that: The direct charging module includes a transformer, a first charger and a first battery pack; the transformer and the first charger are sequentially connected in series between the second output terminal of the switching module and the first battery pack; The transformer is used to step down the voltage generated by the generator power supply module to the rated voltage of the first charger; The first charger is used to charge the first battery pack according to the rated voltage formed by the voltage step-down of the transformer.

3. The energy-saving power supply system according to claim 2, characterized in that: The indirect charging module includes a phase-change energy storage device, a thermoelectric power generation device, a second charger, and a second battery pack; the phase-change energy storage device, the thermoelectric power generation device, and the second charger are sequentially connected in series between the second output terminal of the switching module and the second battery pack; The phase change energy storage device is used to convert at most part of the electrical energy generated by the generator power supply module into thermal energy, and perform primary storage of the thermal energy through a phase change process; The thermoelectric power generation device is used to generate an electromotive force according to the thermoelectric effect through the temperature difference formed by the phase change process of the phase change energy storage device; The second charger is used to charge the second battery pack according to the electromotive force generated by the thermoelectric power generation device.

4. The energy-saving power supply system according to claim 3, characterized in that: The phase-change energy storage device includes a phase-change material and a heating wire. The heating wire is arranged in the phase-change material and is electrically connected to the second output end of the switching module.

5. The energy-saving power supply system according to claim 4, characterized in that: The phase change material includes a molten salt.

6. The energy-saving power supply system according to claim 4, characterized in that: The thermoelectric power generation device comprises a semiconductor thermoelectric structure, a hot electrode and a cold electrode; The hot electrode and the cold electrode are respectively connected to the semiconductor thermoelectric structure, the hot electrode is arranged in the phase change material, and the cold electrode is arranged in an outdoor environment; The semiconductor thermoelectric structure is used to generate an electromotive force when there is a temperature difference between the hot electrode and the cold electrode.

7. The energy-saving power supply system according to claim 6, characterized in that: The thermoelectric power generation device includes a plurality of the thermocouples, and the phase-change energy storage device includes a plurality of the heating wires. The heating wires and the thermocouples are alternately arranged in the phase-change material.

8. The energy-saving power supply system according to claim 3, characterized in that: The first battery pack is reused as the second battery pack.

9. The energy-saving power supply system according to claim 1, characterized in that: The switching module includes a first switch, which is a single-pole single-throw switch; The first contact of the first switch is connected to the mains power supply module as the first input end of the switching module; The second contact of the first switch serves as the first output end of the switching module, and is used to connect to the data center load system.

10. The energy-saving power supply system according to claim 1, characterized in that: The switching module includes a second switch; the second switch is a single-pole double-throw switch; The movable contact of the second switch is connected to the generator power supply module as the second input end of the switching module; The first static contact of the second switch serves as the first output end of the switching module, and is used to connect to the data center load system; The second static contact of the second switch serves as the second output end of the switching module and is connected to the energy storage and power consumption system.

Images