Power supply device and power supply system

Abstract

The present application provides a power supply device and a power supply system. The power supply device comprises a first power supply module and a second power supply module; the first power supply module is provided with a plurality of first power supply links, and the second power supply module is provided with a second power supply link; the plurality of first power supply links are each connected to a first downstream load, and the second power supply link is connected to at least one second downstream load; and power is supplied to the corresponding first downstream loads by means of the plurality of first power supply links, respectively, and power is supplied to the at least one second downstream load by means of the second power supply link.

Description

Power supply device and power supply system

[0001] Cross Reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202410814919.8, filed on June 21, 2024, and entitled "Power supply device and power supply system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of power supply, and in particular, to a power supply device and a power supply system. BACKGROUND

[0004] The power supply device can realize network power supply, provide direct current for the load, and ensure the normal operation of the network.

[0005] In some schemes, a single power supply device provides a direct current bus, and multiple loads are connected to the direct current bus to share power. In other schemes, a single power supply device also provides multiple independent power supply links, and the power of the single power supply device is distributed to each independent power supply link. SUMMARY

[0006] The present application provides a power supply device and a power supply system.

[0007] In a first aspect, the present application provides a power supply device, comprising a first power supply module and a second power supply module, wherein the first power supply module has a plurality of first power supply links, and the second power supply module has a second power supply link; the plurality of first power supply links are respectively connected to a first downstream load, and the second power supply link is connected to at least one second downstream load; and the corresponding first downstream load is powered through the plurality of first power supply links, and the at least one second downstream load is powered through the second power supply link.

[0008] In an implementable manner, the first power supply module comprises a first power supply electronic module and / or a second power supply electronic module, and the plurality of first power supply links comprises a first power supply electronic link and / or a second power supply electronic link; wherein the first power supply electronic module has the first power supply electronic link, and powers one first downstream load through the first power supply electronic link, and the first power supply electronic link supports the POE protocol; the second power supply electronic module has the second power supply electronic link, and powers one first downstream load through the second power supply electronic link, and the second power supply electronic link does not support the POE protocol.

[0009] In an implementation, the first power supply module includes a power supply device and a first output connected in series, the power supply device and the first output form the first power supply link, and the first output is connected to one of the first downstream loads.

[0010] In an implementation, the first power supply module includes a first input, a power supply device and a first output connected in series, the first input is configured to receive power, the power supply device and the first output form the first power supply link, the first output is connected to one of the first downstream loads, and the power received by the first input is supplied to one of the first downstream loads through the first power supply link.

[0011] In an implementation, the power supply device includes a PSE chip.

[0012] In an implementation, the second power supply module includes a first current limiting protector and a second output connected in series, the first current limiting protector and the second output form the second power supply link, and the second output is connected to one of the first downstream loads.

[0013] In an implementation, the second power supply module includes a second input, a first current limiting protector and a second output connected in series, the second input is configured to receive power, the first current limiting protector and the second output form the second power supply link, the second output is connected to one of the first downstream loads, and the power received by the second input is supplied to one of the first downstream loads through the second power supply link.

[0014] In an implementation, the power supply device further includes a hot plug circuit, and the first power supply module is plug-in arranged on the hot plug circuit.

[0015] In an implementation, the power supply device further includes a power module, the first power supply module takes power from the power module to supply power to the first downstream loads through the first power supply links, and the second power supply module takes power from the power module to supply power to the at least one second downstream load through the second power supply links.

[0016] In one possible implementation, the power module includes a first power module and a second power module. The first power module is pluggable into the power supply device, and the second power module is fixed to the power supply device. The first power module draws power from the first power module and / or the second power module to supply power to the first downstream load through the plurality of first power supply links. The second power module draws power from the first power module and / or the second power module to supply power to the at least one second downstream load through the second power supply link.

[0017] In one possible implementation, the power supply device further includes a control and management module; the control and management module is used to control the first power supply module and the second power supply module to draw power from the first power supply module and / or the second power supply module.

[0018] In one possible implementation, the power module further includes a power-sharing power module, which is used to obtain a target power supply power of a target power supply device connected to the power supply device. The first power supply module obtains the target power supply power from the power-sharing power module to supply power to the first downstream load through the plurality of first power supply links. The second power supply module obtains the target power supply power from the power-sharing power module to supply power to the at least one second downstream load through the second power supply link.

[0019] In one possible implementation, the second power supply module includes a third input terminal, a second current limiting protector, and a third output terminal connected in sequence. The third input terminal is used to receive power. The third input terminal, the second current limiting protector, and the third output terminal form the second power supply link. The third output terminal is connected to the at least one second downstream load for power supply. The power received by the third input terminal is supplied to the at least one second downstream load through the second power supply link.

[0020] In one possible implementation, the power supply device further includes a heat dissipation module for dissipating heat from the power supply device.

[0021] In one implementation, the heat dissipation module includes a pluggable fan and / or a solidified fan.

[0022] In one possible implementation, the power supply device further includes a control and management module; the control and management module is used to control the heat dissipation module according to the temperature inside the power supply device and the load of the power supply device.

[0023] In a second aspect, a power supply system is provided, comprising a plurality of power supply devices as described in the first aspect, wherein at least two of the power supply devices are connected to each other to share the power supply between the at least two connected power supply devices; wherein the power supply devices include a first power supply module and a second power supply module; the first power supply module has a plurality of first power supply links, and the second power supply module has a second power supply link; the plurality of first power supply links are respectively connected to a first downstream load, and the second power supply link is connected to at least one second downstream load; and power is supplied to the corresponding first downstream load through the plurality of first power supply links, and power is supplied to the at least one second downstream load through the second power supply link.

[0024] In one possible implementation, the plurality of power supply devices includes a first power supply device and at least one second power supply device, wherein the first power supply device is communicatively connected to the at least one second power supply device; the first power supply device controls the at least one second power supply device to supply power through the communication connection with the at least one second power supply device.

[0025] In one possible implementation, the first power supply device includes multiple communication interfaces, each of which is connected to a second power supply device.

[0026] In one possible implementation, the first power supply device includes at least one communication interface connected to an industrial bus, and the at least one second power supply device is connected to the first power supply device via the industrial bus.

[0027] In one possible implementation, the first power supply device further includes a control management module, which is used to detect the load power of the at least one second power supply device and to manage the at least one second power supply device according to the load power of the at least one second power supply device.

[0028] In one possible implementation, the first power supply device is connected to the at least one second power supply device, and the second power supply device, which is at a distance of less than a preset value from the first power supply device, shares power with the first power supply device.

[0029] This application provides a power supply device and system. The power supply device includes a first power supply module and a second power supply module. The first power supply module can provide power to a one-to-one scenario, while the second power supply module can provide power to multiple scenarios. This power supply system can adapt to multiple scenarios, avoiding the limitation of a single floor being covered only by the number of loads in a one-to-many scenario. Based on this, the proposed power supply system uses multiple power supply devices, which are cascaded to provide power. When a power supply device needs to increase its power, it can obtain power from other power supply devices through cascading to power its downstream loads, thereby supporting power expansion and improving power supply reliability. Using the power supply device and system provided in this application, the problems of difficult power expansion of a single device, inability to provide power to multiple scenarios, high cost, and low security can be effectively solved. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0031] Figure 1 is an exemplary embodiment illustrating a passive convergence network structure;

[0032] Figure 2 is a structural diagram of a power supply device illustrating an exemplary embodiment;

[0033] Figure 3 is a structural diagram of the first power supply module shown in an exemplary embodiment;

[0034] Figure 4 is a structural diagram of the second power supply module shown in an exemplary embodiment;

[0035] Figure 5 is a structural diagram of a power supply device illustrating another exemplary embodiment;

[0036] Figure 6 is a connection diagram of multiple power supply devices shown in an exemplary embodiment;

[0037] Figure 7 is a connection diagram of multiple power supply devices shown in another exemplary embodiment;

[0038] Figure 8 is a topology diagram of a power supply system shown in an exemplary embodiment;

[0039] Figure 9 is a topology diagram of a power supply system shown in another exemplary embodiment.

[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0042] In a traditional three-layer network architecture, the network consists of a core layer, an aggregation layer, and an access layer. The aggregation layer network devices are typically active and need to be located in a low-voltage room. The low-voltage room is maintained by an uninterruptible power supply (UPS), air conditioning, and other equipment. Because the aggregation layer network devices are active and located in the low-voltage room, an UPS and air conditioning system are required to maintain its operation. This complicates the maintenance and management of the low-voltage room and increases operating costs.

[0043] Figure 1 illustrates an exemplary three-layer network architecture with passive aggregation, comprising at least one core layer network device, at least two access layer network devices, and at least two passive aggregation layer network devices. In this passive aggregation network, the aggregation layer network devices are passive, thus addressing the issues of high requirements for low-voltage room deployment and complex operation and maintenance in traditional three-layer network architectures. In one possible implementation, the passive network devices may include multiplexers and demultiplexers.

[0044] It should be noted that the number of network devices in the core layer, aggregation layer, and access layer can be set according to actual needs.

[0045] Power supply equipment enables network power supply, providing DC current to the loads and ensuring normal network operation. In some solutions, a single device converts the power supply from AC to DC to provide a DC bus. This DC bus connects multiple downstream loads, which share power to supply power to the downstream loads. However, this solution, with downstream loads sharing power, is difficult to expand to high power levels. Furthermore, because the loads share power, the more loads there are, the less power each load can use, resulting in a significantly reduced power supply distance due to the number of downstream loads. It typically only covers a single floor and cannot meet the power supply needs of multi-story buildings.

[0046] In other solutions, a single device converts the power supply from AC to DC to provide multiple independent power supply links. The power of a single power supply device is distributed to each independent power supply link, which limits the maximum output power of each power supply link. As a result, each power supply link only supplies power to one downstream load, making it impossible to power multiple scenarios with one drive. Due to design and cost issues, the single device in this solution uses a simple fuse solution and therefore does not support the PoE protocol.

[0047] This embodiment proposes a power supply device and a power supply system.

[0048] It is understood that the power supply equipment and power supply system in this embodiment can be applied to traditional three-layer network topology, as well as to converged passive networks or other network architectures. This application does not limit the application scenarios.

[0049] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0050] Figure 2 is a structural diagram of a power supply device illustrated in an exemplary embodiment. The power supply device in this embodiment includes a first power supply module and a second power supply module. The first power supply module has multiple first power supply links, and the second power supply module has a second power supply link. Each first power supply link is connected to a first downstream load, and the second power supply link is connected to at least one second downstream load. Power is supplied to the corresponding first downstream load through each first power supply link, and power is supplied to at least one second downstream load through the second power supply link.

[0051] Figure 2 shows n first downstream loads and n second downstream loads. First downstream load 1a is connected to a first power supply link in the first power supply module via a power supply cable. First downstream load 2a is connected to a first power supply link in the first power supply module via a power supply cable. First downstream load na is connected to a first power supply link in the first power supply module via a power supply cable. Second downstream loads 1b, 2b, ..., nb are all connected to a second power supply link in the second power supply module via a power supply cable.

[0052] In this embodiment, the first power supply module provides one-to-one scenario power supply through a first power supply link, supplying power to one first downstream load through one first power supply link. The second power supply module provides one-to-many scenario power supply, with the second power supply link connecting at least one second downstream load and supplying power to the at least one second downstream load. The at least one second downstream load is connected in parallel and shares the power supply power of the second power supply module.

[0053] The first power supply module and the first downstream load are connected by a power supply cable, and the second power supply module and the second downstream load are connected by a power supply cable.

[0054] The power supply equipment shown in Figure 2 is applicable to power supply in multiple scenarios. The first power supply module can achieve one-to-one power supply, and the second power supply module can achieve one-to-many power supply. This avoids the problem that the power supply of a single device in a one-to-many scenario can only cover a single floor due to the limitation of the number of downstream loads. At the same time, it can avoid the problem that a single device cannot supply power to multiple devices due to the power distribution of the power supply equipment in a one-to-one scenario.

[0055] In some embodiments, the power supply device may further include a control management module, which is connected to the first power supply module and the second power supply module. The control management module controls the first power supply module to supply power to the corresponding first downstream load through each first power supply link, and controls the second power supply module to supply power to at least one second downstream load through the second power supply link.

[0056] In this embodiment, the control and management module can control the power supply of the first power supply module and the second power supply module, and manage the first power supply module and the second power supply module when they are supplying power.

[0057] In some embodiments, the power supply device may include a power module that draws power locally and transmits the obtained power to a first power supply module and a second power supply module, thereby supplying power to a first downstream load and a second downstream load through the first power supply module and the second power supply module, thus eliminating the need for each downstream load to draw power locally and reducing power supply costs.

[0058] In this embodiment, the first power supply module draws power from the power supply module to supply power to the first downstream load through multiple first power supply links; the second power supply module draws power from the power supply module to supply power to at least one second downstream load through a second power supply link.

[0059] The power module supports providing AC-DC power at voltages of 56V, 48V, 24V, and 12V. The voltage provided by the power module is automatically generated according to the settings. For example, if the first power supply module requires a 24V power supply, the power module will output that 24V power to the first power supply module.

[0060] In some embodiments, the power module includes a first power module and a second power module. The first power module is pluggable and detachable from the power supply device, and the second power module is fixed to the power supply device. The first power module draws power from the first power module or the second power module to supply power to a first downstream load through multiple first power supply links. The second power module draws power from the first power module or the second power module to supply power to at least one second downstream load through a second power supply link.

[0061] In this embodiment, the power module can be a power module fixed in the power supply equipment, i.e., a second power module, or a power module that can be plugged into the power supply equipment, i.e., a first power module. The first power module can be plugged into, which facilitates the replacement and maintenance of the first power module. The first power module and the second power module work together to supply power to the first power supply module and the second power supply module, thereby improving the power supply efficiency and reliability of the power supply equipment.

[0062] The first power module and the second power module can convert AC to DC to supply power to the first power module and the second power module.

[0063] In some embodiments, the power supply device may further include a first power module, a second power module, and a control management module. The first power module, the second power module, the first power supply module, and the second power supply module are all connected to the control management module, and the control management module controls the first power supply module and the second power supply module to draw power from the first power module and / or the second power module.

[0064] In some embodiments, the power supply device may further include a heat dissipation module, which can dissipate heat from the power supply device.

[0065] In some embodiments, the heat dissipation module may be a pluggable fan or a solidified fan, etc., without specific limitations.

[0066] The heat dissipation module can be a module fixed inside the power supply equipment or a pluggable module.

[0067] In other embodiments, the heat dissipation module can be connected to the control and management module in the power supply equipment. The control and management module can control the heat dissipation module according to the temperature inside the power supply equipment and the load of the power supply equipment. For example, it can set a speed regulation algorithm according to the temperature and load inside the power supply equipment to reduce the power consumption and noise of the heat dissipation module while meeting the heat dissipation effect.

[0068] In some embodiments, the first power supply module may include a first power supply module and / or a second power supply module, wherein the first power supply module supports power supply via the PoE protocol, and the plurality of first power supply links include a first power supply link and / or a second power supply link; the first power supply module has a first power supply link, the second power supply module does not support power supply via the PoE protocol, and the second power supply module has at least one second power supply link.

[0069] In this embodiment, a first downstream load is powered by a first power supply link, and the first power supply link supports the PoE protocol. The second power supply module has at least one second power supply link, which powers a first downstream load through the second power supply link, and the second power supply link does not support the PoE protocol.

[0070] In this embodiment, a first power supply module and / or a second power supply module can be set as needed to realize a one-to-one power supply scenario that supports PoE or a one-to-one power supply scenario that does not support PoE.

[0071] In some embodiments, the first power supply module includes a connected power supply device and a first output terminal, the power supply device and the first output terminal forming a first power supply link supporting the PoE protocol, and the first output terminal being connected to a first downstream load.

[0072] Understandably, the first power supply module has multiple first power supply links, and each power supply link corresponds to a power supply device and a first output terminal, that is, the power supply device and the first output terminal correspond one-to-one.

[0073] In this embodiment, the power supply device can be a PSE chip (Power Sourcing Equipment, a device that provides power in a PoE system). This power supply device can perform PoE authentication and other processes. Thus, this power supply device and the first output terminal form a first power supply link that supports the PoE protocol, thereby enabling power supply that supports the PoE protocol.

[0074] In this embodiment, the first output terminal can be a DC connector, output terminal, output interface, etc., and there are no specific limitations here. The first output terminal is connected to the first downstream load, so as to supply power to the first downstream load through the first output terminal.

[0075] In some embodiments, the power supply port corresponding to the first output terminal can be a sub-card, which is an expansion card used to increase the number of ports. The first downstream load is connected through the sub-card. The sub-card is easier to replace, which facilitates the maintenance of the power supply equipment and the expansion of ports.

[0076] In some embodiments, as shown in FIG3, a structural diagram of a first power supply module is provided. The first power supply module further includes a first input terminal, which is connected to a power supply device. The first input terminal can be connected to the power supply module of the power supply device, such as being connected to the first power supply module or the second power supply module, or being connected to both the first power supply module and the second power supply module at the same time. Thus, the first input terminal obtains power from the power supply module and provides the power to the first power supply link, thereby supplying power to the first downstream load.

[0077] In this embodiment, the first input terminal can be a DC connector, input terminal, input interface, etc., and no specific limitation is made here.

[0078] It is important to note that the first power supply module supports PoE protocol power supply. Therefore, when powering the first power supply module, the output voltage of the power supply module or related modules within it (such as the first power supply module and / or the second power supply module) can be set to 56V to meet the power requirements for PoE protocol power supply. Alternatively, the specific voltage output by the power supply module or related modules within it for the first power supply module can be left unset. The power supply module or related modules can output AC-DC power at voltages such as 56V / 48V / 24V / 12V, adaptively outputting the appropriate value based on the voltage required by the first power supply module.

[0079] It is understandable that there may be one or more first power supply links supporting the PoE protocol, and the corresponding power supply devices in all first power supply links supporting the PoE protocol are connected to the first input terminal.

[0080] In one embodiment, the first power supply module includes a first input terminal, a power supply device, and a first output terminal. The first input terminal draws power from the power supply module to obtain power. Multiple power supply devices perform power allocation and management on the output of each first power supply link supporting the PoE protocol. If the downstream load is a standard PD device (a network device that needs to receive power in the PoE power supply system), power management can be supported, and one-to-one PoE power supply can be achieved through the first power supply module. If it is a non-standard PoE device, power can be supplied by setting "forced power supply" on the panel of the power supply device and selecting the button.

[0081] In this embodiment, a line can be connected between the power supply device and the first input terminal to the control management module to supply power to the control management module. This line can also be connected to other devices for protection or external connection of the first power supply module. For example, other devices can be used to ensure the smooth connection between the first power supply link and the first input terminal in the first power supply module, or other control devices can be connected to control or write the processing program in the first power supply module through the external control devices.

[0082] In some embodiments, the second power supply module includes a first current limiting protector and a second output terminal connected together, the first current limiting protector and the second output terminal forming a second power supply link, and the second output terminal being connected to a first downstream load.

[0083] Understandably, one second power supply link corresponds to one first current limiting protector and one second output terminal, with the first current limiting protector and the second output terminal corresponding one-to-one.

[0084] In this embodiment, the first current limiting protector is used to limit the current and prevent excessive voltage in the second power supply link from causing the second power supply link to fail, thereby protecting the safety of the corresponding second power supply link.

[0085] Understandably, since the first power supply module is equipped with a power supply device, which can control and manage the voltage in the corresponding first power supply link, the safety of the first power supply link can be protected without having to repeatedly set up the first current limiting protector.

[0086] In this embodiment, the second output terminal can be a DC connector, output terminal, output interface, etc., and there are no specific limitations here. The second output terminal is connected to the first downstream load, so as to supply power to the first downstream load through the second output terminal.

[0087] In some embodiments, the power supply port corresponding to the second output terminal can be a sub-card, through which the first downstream load is connected, and the sub-card is easier to replace.

[0088] In some other embodiments, as shown in the structural diagram of the second power supply module in FIG4, the second power supply module further includes a second input terminal, which is connected to the first current limiting protector.

[0089] In this embodiment, the second input terminal can be a DC connector, input terminal, input interface, etc., and no specific limitation is made here.

[0090] In other embodiments, the power supply equipment is provided with a power module. For example, the second input terminal can be connected to the power module of the power supply equipment, such as being connected to the first power module or the second power module, or simultaneously connected to the first power module and the second power module. The power obtained is through the second power supply link. In this case, the second input terminal can draw power from the power module to supply power to the connected first downstream load.

[0091] In other embodiments, the power supply equipment is provided with a power module, which may include a first power module and a second power module. The second input terminal may be connected to the power module of the power supply equipment, such as being connected to the first power module or the second power module, or being connected to both the first power module and the second power module. The power module provides power to the second power supply module. The second input terminal may draw power from the second power supply module to obtain power to supply power to the first downstream load through the second power supply link.

[0092] It is important to note that the second power supply module does not support the PoE protocol. Therefore, the voltage of the power supply received by the second power supply module can be any value, such as 6V / 48V / 24V / 12V AC-DC power. When the second power supply module is powered by the power supply module or related modules within the power supply module, the power supply module or related modules within the power supply module can output 56V / 48V / 24V / 12V AC-DC power. It adaptively outputs the corresponding value of power according to the voltage required by the second power supply module. Furthermore, when the amount of power received by the second power supply module is too large, the first current limiting protector in the second power supply module can protect the second power supply link.

[0093] Understandably, there may be one or more second power supply links, and the first current limiting protector in all second power supply links is connected to a second input terminal.

[0094] In one embodiment, the second power supply module includes a second input terminal, a first current limiting protector, and a second output terminal. The second input terminal draws power from the power supply module and supplies power directly to the downstream load through the first current limiting protector and the second output terminal corresponding to each second power supply link. The downstream loads in the second power supply link share the power budget. When the power limit is exceeded or a short circuit occurs, the corresponding second power supply link will be powered down, while other power supply links will not be affected.

[0095] In this embodiment, for the second power supply link, a line can be connected between the first current limiting protector and the second input terminal to the control management module to supply power to the control management module. This line can also be connected to other devices for protection or external connection of the first power supply module. For example, other devices can be used to ensure the smooth connection between the second power supply link and the second input terminal in the second power supply module, or other control devices can be connected to control or write the processing program in the second power supply module through the external control device.

[0096] In some embodiments, the power supply device further includes a hot-swappable circuit, on which a first power supply module is disposed, and correspondingly, the structures in the first power supply module and / or the second power supply module are pluggably disposed on the hot-swappable circuit.

[0097] This hot-swappable circuit is a live-plug circuit, which allows devices to be removed from the hot-swappable circuit without shutting down the power supply, such as removing the first power supply module from the circuit for replacement.

[0098] In other embodiments, the second power supply module includes a third input terminal, a second current limiting protector, and a third output terminal connected in sequence. The third input terminal, the second current limiting protector, and the third output terminal form a second power supply link. The third input terminal is used to draw power and obtain power. The second power supply link supplies power to at least one second downstream load through the third output terminal.

[0099] The third input terminal is connected to the power module. When the power module or related modules in the power module provide power to the first power supply module, it can output AC-DC power with voltages of 56V (volts) / 48V / 24V / 12V, etc. It adaptively outputs the corresponding voltage value according to the voltage required by the second power supply module.

[0100] Understandably, the third output terminal of the second power supply module connects to multiple second downstream loads, which are connected in parallel. Therefore, the second power supply module can simultaneously supply power to multiple second downstream loads, achieving power supply in a one-to-many scenario. In contrast, the first power supply module can be divided into a first power supply module and a second power supply module. The first power supply module has multiple first power supply links, with each first power supply link connected to a first downstream load, enabling PoE-enabled power supply. The second power supply module has multiple second power supply links, with each second power supply link connected to a first downstream load, enabling power supply in a PoE-unsupported scenario. In other words, the first power supply module can achieve power supply in a one-to-one scenario.

[0101] In this embodiment, the input terminal can be a DC connector, input terminal, input interface, etc., and no specific restrictions are imposed here; the second current limiting protector is used to limit the current and protect the safety of the second power supply link; the third output terminal can be a DC connector, output terminal, output interface, etc., and no specific restrictions are imposed here.

[0102] In this embodiment, the third output terminal can be a T-type terminal, thereby realizing the distribution of multiple loads to supply power to multiple second downstream loads.

[0103] It is understood that there is one second power supply link, and this one second power supply circuit can supply power to multiple second downstream loads.

[0104] In this embodiment, the second power supply module can be fixed in the power supply equipment or it can be plugged in.

[0105] Figure 5 is a schematic diagram of the structure of a power supply device according to another exemplary embodiment. The power supply device includes a first power supply module, a second power supply module, a power supply module, a control management module, and a heat dissipation module.

[0106] The first power supply module, the second power supply module, the power supply module, and the heat dissipation module are all connected to the control and management module. The first power supply module is connected to the power supply module, and the power supply module is connected to the second power supply module. The control and management module can control the operation of the heat dissipation module, control the first power supply module to draw power from the power supply module, control the second power supply module to draw power from the power supply module, control the first power supply module to supply power to the first downstream load, and control the second power supply module to supply power to the second downstream load.

[0107] In this embodiment, the power supply device includes a first power supply module, a second power supply module, a power module, a control management module, and a heat dissipation module. The first power supply module, the second power supply module, the power module, the control management module, and the heat dissipation module can be assembled to obtain the power supply device, which is used to supply power to the downstream load.

[0108] In one embodiment, as shown in FIG5, the power module further includes a first power module and a second power module, which can supply power to the first power module and the second power module.

[0109] In some embodiments, the power supply equipment mentioned above can be used alone in a power supply scenario, or it can be combined with multiple power supply equipment to design a power supply system. The power supply equipment in the power supply system can be connected to share power supply to further improve power supply efficiency and the power supply scenario and power supply area.

[0110] At this time, a power sharing power module can also be set in the power supply module of the power supply equipment. The power supply equipment can be connected to other power supply equipment to share power. When the power of one of the two connected power supply equipment is idle, it can send its power to the other connected power supply equipment. The other power supply equipment receives the sent power and can then use the power obtained by the power sharing power module to supply power to the first power supply module and the second power supply module.

[0111] Understandably, a power supply device A is defined, and other power supply devices connected to this power supply device can be regarded as target power supply devices. After the target power supply devices meet the power requirements of their downstream loads, their idle power supply can be shared with power supply device A. The idle power supply received by the power sharing module of power supply device A can be regarded as the target power supply, which serves as the backup power of power supply device A. When the power supply of power supply device A itself does not meet the needs of its downstream loads, it can obtain the target power supply from the power sharing module to power the downstream loads. For example, the first power supply module obtains the target power supply from the power sharing module to power the first downstream load through multiple first power supply links; the second power supply module obtains the target power supply from the power sharing module to power at least one second downstream load through a second power supply link.

[0112] In one embodiment, a power supply system includes multiple power supply devices, at least two of which are connected to each other to share the power supply between the connected devices. Each power supply device includes a first power supply module and a second power supply module. The first power supply module has multiple first power supply links, and the second power supply module has a second power supply link. Each first power supply link is connected to a first downstream load, and each second power supply link is connected to at least one second downstream load. Each first power supply link supplies power to its corresponding first downstream load, and each second power supply link supplies power to at least one second downstream load.

[0113] The power supply system in this embodiment includes the power supply devices mentioned above. At least two of the power supply devices are connected to each other. This connection can be between two or more power supply devices, or all power supply devices can be connected. The connection between the power supply devices can be cascaded, such as through cascade cables, or in other ways. Through this connection, the connected power supply devices can share power. When a power supply device needs to increase its power due to high downstream load power demand, it can obtain idle power from other power supply devices through the connection between the devices to power the downstream load of the power supply device, thereby supporting power expansion and improving power supply reliability.

[0114] The connection between the multiple power supply devices can be cascaded to enable power sharing among the connected power supply devices. The connection between the multiple power supply devices can form a connection structure such as bus, mesh, tree or star to achieve power sharing among the connected power supply devices. The shape of the connection between the power supply devices is not specifically limited here.

[0115] In some embodiments, as shown in Figure 6, the connection relationship between multiple power supply devices is such that the multiple power supply devices are connected sequentially, with one power supply device connecting to the next. A power supply device that is already connected is not considered a device that can be reconnected. For example, if there are power supply devices A, B, C, and D, and they need to be connected for power sharing, the connection between power supply devices A, B, C, and D is established starting with power supply device A. If power supply devices B, C, and D are not connected to other power supply devices, then power supply device A can connect to any one of power supply devices B, C, or D. If power supply device B is chosen to be connected, then power supply device B can connect to any one of power supply devices C or D, thus completing the connection of multiple power supply devices.

[0116] In other embodiments, the connection relationship between multiple power supply devices is shown in Figure 7. Figure 7 shows that the connection between multiple power supply devices is in a mesh pattern. For example, there are power supply devices A, B, C, and D that need to be connected for power sharing. Each pair of power supply devices A, B, C, and D is connected to each other.

[0117] It is understood that the connection of multiple power supply devices in the power supply system shown in Figures 6 and 7 to share power supply and the connection structure are schematic. In other embodiments, there may be other connection methods to obtain other connection structures.

[0118] In some embodiments, the plurality of power supply devices includes a first power supply device and at least one second power supply device, and the first power supply device and the at least one second power supply device are communicatively connected. The first power supply device includes a control and management module, which controls the power supply of the at least one second power supply device through the communication connection with the at least one second power supply device.

[0119] Understandably, the communication connection between the first power supply device and at least one second power supply device differs from the connection used for power sharing among multiple power supply devices. This difference lies in the different connection methods and their functions. Therefore, the communication connection between the first power supply device and at least one second power supply device is achieved through a single line, while the connection used for power sharing among multiple power supply devices requires a different line. In other words, both the communication connection between two power supply devices and the power sharing connection require two separate cables. For example, the communication connection between the first power supply device and at least one second power supply device can be achieved through a communication cable, while the power sharing connection among multiple power supply devices can be achieved through cascaded cables.

[0120] In this embodiment, a first power supply device can be set in the power supply system. The first power supply device is regarded as the master, and the other power supply devices are slaves, that is, the second power supply devices.

[0121] The control and management module in the first power supply equipment can control the operation of the entire power supply system, and it controls the power supply of the second power supply equipment through a communication connection.

[0122] In one embodiment, the communication connection between the first power supply device and at least one second power supply device is achieved through a communication cable, which connects the control and management module in the first power supply device to the second power supply device.

[0123] Understandably, the second power supply equipment is also equipped with a control and management module. The communication cable connects the control and management module in the first power supply equipment to the control and management module in the second power supply equipment to realize the control and management of the second power supply equipment.

[0124] It should be noted that only the control and management module in the first power supply equipment controls the entire power supply system. It can control the power supply of the first power supply equipment and can also send control commands to the second power supply equipment through the communication connection, thereby controlling the power supply of the second power supply equipment. The control of the power supply of the second power supply equipment can be achieved by the control and management module in the second power supply equipment receiving the commands issued by the control and management module in the first power supply equipment, thereby controlling the power supply in the second power supply equipment.

[0125] It is also understandable that the cascading cables that enable the cascading of multiple power supply devices also connect the control and management modules in two power supply devices to achieve power sharing control. Furthermore, when a first power supply device exists, the first power supply device is cascaded with at least one second power supply device.

[0126] Figure 8 is a topology diagram of a power supply system illustrating an exemplary embodiment, showing a star topology connection between a first power supply device and at least one second power supply device.

[0127] The first power supply device includes multiple communication interfaces, each of which is connected to a second power supply device, thus forming a star topology connection. Therefore, when the communication interface resources of the first power supply device are sufficient, it is recommended to use a star topology connection to process the second power supply devices in parallel, resulting in a faster response.

[0128] In Figure 8, there are n second power supply devices. Each communication interface of the first power supply device is connected to a second power supply device. For example, second power supply device 1c is connected to one communication interface of the first power supply device, second power supply device 2c is connected to another communication interface of the first power supply device, and so on. Second power supply device nc is connected to another communication interface of the first power supply device. Each second power supply device is connected to a different communication interface of the first power supply device.

[0129] Figure 9 is a topology diagram of a power supply system shown in another exemplary embodiment, which shows a Fly-by topology connection between a first power supply device and at least one second power supply device.

[0130] In this embodiment, a communication interface of the first power supply device is connected through an industrial bus. Multiple second power supply devices are connected to the industrial bus, thereby realizing the communication connection between the first power supply device and multiple second power supply devices through the industrial bus, resulting in a Fly-by topology connection structure. In this way, the Fly-by topology can be used when the number of communication interfaces of the first power supply device is limited.

[0131] In Figure 9, there are n second power supply devices. One communication interface of the first power supply device is connected to an industrial bus. Second power supply devices 1c, 2c, ..., nc are connected to the first power supply device through the industrial bus.

[0132] The first power supply device can be determined by human intervention or by automatic selection from multiple power supply devices. Once the first power supply device is determined, other power supply devices will automatically become the second power supply devices, working in conjunction with the main unit of the power supply control center to achieve power supply management.

[0133] It is understandable that Figures 8 and 9 show the communication connection structure and relationship between the first power supply device and the second power supply device, while Figures 6 and 7 show the connection structure and relationship between multiple power supply devices for power sharing. These two structures and relationships can coexist in a power supply system.

[0134] It is understandable that the first power supply device and multiple second power supply devices are connected by communication, and the power supply control of the second power supply devices is performed through the control and management module in the first power supply device and the communication connection.

[0135] Understandably, both the first and second power supply devices are equipped with a first power supply module and a second power supply module. The first power supply module provides one-to-one power supply, while the second power supply module provides one-to-many power supply. Both the first and second power supply devices have external power supply interfaces (i.e., output terminals) for the first and second power supply modules. The external power supply interface of the second power supply module can be used to implement one-to-many power supply cards; that is, by inserting these cards, one-to-many power supply can be achieved. In this one-to-many power supply, a short circuit at any point may cause the entire line to lose power. The short-circuit protection function of this one-to-many power supply is implemented through a matching T-type terminal. For example, a single-point short circuit in a second downstream load will not cause the output bus of the external power supply interface of the second power supply module to fail.

[0136] The first power supply module within the first power supply equipment and the second power supply equipment may include a first power supply module and a second power supply module. Each second power supply link in the second power supply module has a corresponding first current limiting protector. Each second power supply module corresponds to multiple external power supply bearer interfaces, and each external power supply bearer interface corresponds to one second power supply link. The external power supply bearer interface corresponding to the second power supply link can realize a one-to-one plug-in card that does not support PoE protocol power supply. That is, by inserting the first power supply module into the external power supply bearer interface, one-to-one power supply is achieved. A short circuit in the power supply of one path corresponding to the external power supply bearer interface of the second power supply module will not affect the power supply of other paths.

[0137] Each power supply link in the first power supply module has a corresponding power supply device, which provides power management function for the power supply of each power supply device's single power supply link. The first power supply module corresponds to multiple external power supply bearer interfaces, and each external power supply bearer interface corresponds to one first power supply link. The external power supply bearer interface corresponding to the first power supply link can realize a one-to-one plug-in card that supports PoE protocol power supply. That is, by inserting the first power supply module into the external power supply bearer interface, a one-to-one power supply can be achieved. A short circuit in the power supply of one path corresponding to the external power supply bearer interface of the first power supply module will not affect the power supply of other paths.

[0138] In this embodiment, the reliability of the entire power supply system can be upgraded through the control and management module in the first power supply device and the connection (such as cascading) between at least two power supply devices in the power supply system. For the power supply system, when the number of power supply devices (including the first and second power supply devices) in the system is M, the maximum power consumption of the downstream loads (including the first and second downstream loads) corresponding to the power supply devices in the system does not exceed the sum of the effective power supply power of the M power supply devices; that is, the M power supply devices can supply power to the downstream loads of the power supply system. In this case, by adding N power supply devices to the power supply system, the power supply system can share the power of the added N power supply devices, thereby improving the reliability of the power supply system. After adding N power supply devices, the number of power supply devices in the power supply system is M+N. The power supply power shared by these M+N power supply devices can be entered into the power sharing module of each power supply device as the backup power supply power for the corresponding power supply device. Thus, when the power supply power of the power supply device is insufficient to provide power to the downstream load, power can be drawn from the power sharing module to power the downstream load, thereby improving the reliability of the power supply system. When no more than N power supply devices fail, the M power supply devices in the power supply system can still support the power supply of the downstream load, that is, it will not affect the power supply of the downstream load of the power supply system at this time.

[0139] Understandably, M is an integer greater than or equal to 2, and N is an integer greater than or equal to 1.

[0140] In other embodiments, multiple connected power supply devices share power. Power sharing can be based on the distance between the power supply devices, specifically between two nearby power supply devices. If a power supply device needs or can provide power, the device closest to it will be the first to share power. If the closest power supply device cannot meet the power sharing requirement, the next closest power supply device can be used. Here, the distance between power supply devices refers to the length of the cascaded cable connecting the devices.

[0141] Taking the first power supply device as an example, the second power supply device, whose distance from the first power supply device is less than a preset value, shares the power supply power with the first power supply device.

[0142] The first power supply device is connected to at least one second power supply device via cascaded cables. The second power supply device whose cascaded cable length to the first power supply device is less than a preset value shares power with the first power supply device. That is, the first power supply device selects the second power supply device closest to it to provide power. The preset value can be set by empirical parameters. For example, the minimum length of the cascaded cable between the second power supply device and the first power supply device can be used as the reference value, and the second minimum length of the cascaded cable between the second power supply device and the first power supply device can be used as the preset value. Alternatively, the second minimum length of the cascaded cable between the second power supply device and the first power supply device can be used as the reference value, and the third minimum length of the cascaded cable between the second power supply device and the first power supply device can be used as the preset value. No specific restrictions are imposed here.

[0143] In this embodiment, the control and management module in the first power supply device can determine the priority power sharing method according to the topology of the power supply system. For the first power supply device, if the first power supply device meets the centralized power supply requirements of the downstream load, the second power supply device that is close to the first power supply device will be given priority to provide power. The second power supply device that is close to the first power supply device can be regarded as having the shortest cascade cable length with the first power supply device, so as to avoid unnecessary power loss of the second power supply device that is further away due to the excessive impedance of the cascade cable. For the same second power supply device, other power supply devices that are close to the second power supply device and are cascaded can be selected to provide power (shared power).

[0144] Of course, it is understandable that when the second power supply device closest to the first power supply device has no idle power, it is also possible to select other second power supply devices with shorter cascaded cable lengths to share power, based on the length of the cascaded cable between the second power supply device and the first power supply device. This process can be achieved by setting different preset values.

[0145] In other embodiments, the control and management module in the first power supply device can also monitor the load power of each power supply device (the first power supply device and the second power supply device) in the power supply system (the power required by the first and second downstream loads of each power supply device). When a downstream load of a power supply device is in a low power demand state, the control and management module in the first power supply device can control the corresponding power supply device to be in an IDLE state without affecting the power supply of the downstream load under that power supply device or without affecting the power supply of the downstream loads of other power supply devices. When the downstream load power is detected to be rising, the power supply device is woken up as needed to provide sufficient power.

[0146] In some embodiments, sensors may also be provided in the first and second power supply devices to detect the temperature inside the power supply devices, and the control and management module in the power supply devices may also receive the power consumption of the downstream load. The sensor is connected to the control and management module, and the control and management module is equipped with a speed regulation algorithm, which can adjust the fan speed of the heat dissipation module according to the temperature and the power consumption of the downstream load. The speed regulation algorithm can be set with multiple speeds, and different fan speeds can be set according to different temperatures and the power consumption of the downstream load, thereby effectively reducing the power consumption and noise level of the heat dissipation module in the power supply device.

[0147] In some embodiments, the first power supply module includes a first power supply module and / or a second power supply module, and the plurality of first power supply links include a first power supply link and / or a second power supply link; wherein, the first power supply module has at least one first power supply link supporting the PoE protocol, the second power supply module has at least one second power supply link, and the second power supply link does not support the PoE protocol.

[0148] The description of the first and second power supply modules can be found in the relevant descriptions of the power supply equipment mentioned above, and will not be repeated here. It is understood that the first and second power supply modules can exist in multiple power supply devices at the same time, or they can exist in a single power supply device, so as to meet the needs of one-to-one power supply scenarios that support the PoE protocol and one-to-one power supply scenarios that do not support the PoE protocol.

[0149] In some embodiments, the first power supply module includes a connected power supply device and a first output terminal, the power supply device and the first output terminal forming a first power supply link, and the first output terminal being connected to a first downstream load.

[0150] The description of the relevant structure in the first power supply module can be found in the description of the power supply equipment mentioned above, and will not be repeated here. The first power supply module may also include a first input terminal for powering the first downstream load connected to the first power supply link in the first power supply module.

[0151] In some embodiments, the second power supply module includes a first current limiting protector and a second output terminal connected together, the first current limiting protector and the second output terminal forming a second power supply link, and the second output terminal being connected to a first downstream load.

[0152] The description of the relevant structure in the second power supply module can be found in the description of the power supply equipment mentioned above, and will not be repeated here. The second power supply module may also include a second input terminal for powering the first downstream load connected to the second power supply link in the second power supply module.

[0153] In some embodiments, the power supply device further includes a hot-swappable circuit, on which the first power supply module is pluggable.

[0154] The first power supply module can be inserted into the hot-swappable circuit, and the first power supply module can also be unplugged from the hot-swappable circuit, thereby facilitating the maintenance and replacement of the first power supply module.

[0155] Understandably, the first power supply module can also be fixed in the power supply equipment.

[0156] In some embodiments, the power supply device further includes a power module, wherein a first power module draws power from the power module to supply power to a first downstream load through a plurality of first power supply links; and a second power module draws power from the power module to supply power to at least one second downstream load through a second power supply link.

[0157] The description of the relevant structures in the power supply module can be found in the description of the power supply equipment mentioned above, and will not be repeated here.

[0158] In some embodiments, the power module includes a first power module and a second power module. The first power module is pluggable and detachable from the power supply device, and the second power module is fixed to the power supply device. The first power module draws power from the first power module or the second power module to supply power to a first downstream load through multiple first power supply links. The second power module draws power from the first power module or the second power module to supply power to at least one second downstream load through a second power supply link.

[0159] In some embodiments, the second power supply module includes a third input terminal, a second current limiting protector, and a third output terminal connected in sequence. The third input terminal, the second current limiting protector, and the third output terminal form a second power supply link. The third input terminal is used to draw power, and the second power supply link supplies power to at least one second downstream load through the second output terminal.

[0160] The description of the relevant structure in the second power supply module can be found in the description of the power supply equipment mentioned above, and will not be repeated here. The second power supply module provides a second power supply link, which can supply power to multiple second downstream loads to meet the one-to-many power supply scenario.

[0161] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0162] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A power supply device, comprising a first power supply module and a second power supply module, wherein, The first power supply module has multiple first power supply links, and the second power supply module has a second power supply link; The plurality of first power supply links are respectively connected to a first downstream load, and the second power supply link is connected to at least one second downstream load; as well as The first power supply links supply power to the corresponding first downstream loads, and the second power supply links supply power to the at least one second downstream load.

2. The power supply equipment according to claim 1, wherein, The first power supply module includes a first power supply module and / or a second power supply module, and the plurality of first power supply links include a first power supply link and / or a second power supply link; wherein, The first power supply module has a first power supply link, which supplies power to a first downstream load, and the first power supply link supports the PoE protocol; and The second power supply module has a second power supply link, which supplies power to a first downstream load, and the second power supply link does not support the PoE protocol.

3. The power supply equipment according to claim 2, wherein, The first power supply module includes a first input terminal, a power supply device, and a first output terminal connected in sequence; The first input terminal is used to receive power. The power supply device and the first output terminal form the first power supply link; and The first output terminal is connected to a first downstream load, and the power received at the first input terminal supplies power to the first downstream load through the first power supply link.

4. The power supply equipment according to claim 3, wherein, The power supply device includes a PSE chip.

5. The power supply equipment according to claim 2, wherein, The second power supply module includes a second input terminal, a first current limiting protector, and a second output terminal connected in sequence. The second input terminal is used to receive power. The first current-limiting protector and the second output terminal form the second power supply link; and The second output terminal is connected to one of the first downstream loads, and the power received at the second input terminal supplies power to one of the first downstream loads through the second power supply link.

6. The power supply equipment according to claim 1, wherein, The second power supply module includes a third input terminal, a second current limiting protector, and a third output terminal connected in sequence; The third input terminal is used to receive power. The third input terminal, the second current limiting protector, and the third output terminal form the second power supply link; as well as The third output terminal is connected to the power supply of the at least one second downstream load, and the power received by the third input terminal is supplied to the at least one second downstream load through the second power supply link.

7. The power supply equipment according to any one of claims 1 to 6, wherein, The power supply equipment also includes a power module; The first power supply module draws power from the power module to supply power to the first downstream load through the plurality of first power supply links; and The second power supply module draws power from the power supply module to supply power to the at least one second downstream load through the second power supply link.

8. The power supply equipment according to claim 7, wherein, The power module includes a first power module and a second power module; The first power module is pluggable and can be installed in the power supply equipment, while the second power module is fixed to the power supply equipment; The first power supply module draws power from the first power module and / or the second power module to supply power to the first downstream load through the plurality of first power supply links; as well as The second power supply module draws power from the first power supply module and / or the second power supply module to supply power to the at least one second downstream load through the second power supply link.

9. The power supply equipment according to claim 8, wherein, The power supply equipment also includes a control and management module; and The control and management module is used to control the first power supply module and the second power supply module to draw power from the first power module and / or the second power module.

10. The power supply equipment according to claim 7, wherein, The power module also includes a power-sharing power module; The power sharing module is used to obtain the target power supply power of the target power supply device connected to the power supply equipment; The first power supply module obtains the target power supply from the power-sharing power supply module to supply power to the first downstream load through the plurality of first power supply links; as well as The second power supply module obtains the target power supply from the power-sharing power supply module to supply power to the at least one second downstream load through the second power supply link.

11. The power supply equipment according to any one of claims 1 to 6, wherein, The power supply equipment also includes a hot-swappable circuit, on which the first power supply module can be plugged and unplugged.

12. The power supply equipment according to any one of claims 1 to 6, wherein, The power supply equipment also includes a heat dissipation module, which is used to dissipate heat from the power supply equipment.

13. The power supply equipment according to claim 12, wherein, The heat dissipation module includes a pluggable fan and / or a solidified fan.

14. The power supply equipment according to claim 12 or 13, wherein, The power supply equipment also includes a control and management module; and The control and management device is used to control the heat dissipation module according to the temperature inside the power supply equipment and the load of the power supply equipment.

15. A power supply system comprising a plurality of power supply devices as described in any one of claims 1 to 14, wherein at least two of the power supply devices are connected to share the power supply between the at least two connected power supply devices; wherein, The power supply equipment includes a first power supply module and a second power supply module; The first power supply module has multiple first power supply links, and the second power supply module has a second power supply link; The plurality of first power supply links are respectively connected to a first downstream load, and the second power supply link is connected to at least one second downstream load; as well as The first power supply links supply power to the corresponding first downstream loads, and the second power supply links supply power to the at least one second downstream load.

16. The power supply system according to claim 15, wherein, The plurality of power supply devices includes a first power supply device and at least one second power supply device; The first power supply device is communicatively connected to the at least one second power supply device; as well as The first power supply device controls the power supply of the at least one second power supply device through a communication connection with the at least one second power supply device.

17. The power supply system according to claim 16, wherein, The first power supply device includes multiple communication interfaces, each of which is connected to a second power supply device.

18. The power supply system according to claim 16, wherein, The first power supply device includes at least one communication interface connected to an industrial bus, and the at least one second power supply device is connected to the first power supply device through the industrial bus.

19. The power supply system according to any one of claims 16 to 18, wherein, The first power supply device further includes a control and management module, which is used to detect the load power of the at least one second power supply device; as well as The at least one second power supply device is managed according to its load power.

20. The power supply system according to any one of claims 16 to 18, wherein, The first power supply device is connected to the at least one second power supply device; and A second power supply device whose distance from the first power supply device is less than a preset value shares power with the first power supply device.

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