TWI490684B - Power supply device and system with power sharing function, and method for power supply devices with power sharing function - Google Patents

Description

Power supply device with power sharing function, power supply system, and power sharing method

The present invention relates to a power supply device, and more particularly to a power supply device having a power sharing function.

With the development of technology and the popularity of network transmission, information centers composed of multiple computers and servers have become more and more popular. In order to maintain a certain quality and stability, to avoid the computer or server power supply device damage caused by accidental failure of the computer or server or the loss of stored data, an uninterruptible power supply device is used to ensure a stable high. Quality power supply.

Generally, a power supply device of a conventional electronic device uses a plurality of power supply units in a power supply device, and each power supply unit adopts a parallel connection operation mode. However, although this method can ensure that any power supply unit is damaged, the power supply device can still provide a stable power supply, but the provision of multiple power supply units not only causes cost, but also increases the power of the power supply device. loss. In addition, the power supply unit as an alternate setting is mostly in an idle state, and the power utilization, management, and scheduling cannot be effectively performed, which causes waste.

The present invention provides a power supply device with a power sharing function, and is coupled with at least one other power supply device. The power supply device includes a power supply unit and a power distribution unit. The power distribution unit is electrically connected to the power supply unit. The power distribution unit includes a power receiving circuit and a power output circuit. The power receiving circuit is electrically connected to the power supply unit and the power output circuit of the power distribution unit of the other power supply device, and the power output circuit and the power are connected. The source supply unit and the power receiving circuit of the power distribution unit of the other power supply device are electrically connected. The power supply unit provides a first power source to another power supply device through the power output circuit of the power distribution unit, and the power receiving circuit of the power distribution unit receives a second power source provided by the other power supply device.

The present invention further provides a power supply system having a power sharing function, including a plurality of power supply devices, and the power supply devices are electrically connected to each other. And each power supply device includes a power supply unit and a power distribution unit, and the power distribution unit is electrically connected to the power supply unit. The power distribution unit includes a power receiving circuit and a power output circuit. The power receiving circuit is electrically connected to the power supply unit and the power output circuit of the power distribution unit of the other power supply device, the power output circuit and the power supply unit, and another power supply device. The power receiving circuit of the power distribution unit is electrically connected. The power supply unit provides a first power source to another power supply device through the power output circuit of the power distribution unit, and the power receiving circuit of the power distribution unit receives a second power source provided by the other power supply device.

The present invention further provides a power sharing method for the power supply device, which is combined with a first power supply device and a second power supply device. The first power supply device includes a first power supply unit and a first power distribution unit, and the second power supply device includes a second power supply unit and a second power distribution unit, wherein the first power distribution unit includes the first a power receiving circuit and a first power output circuit, the second power distribution unit includes a second power receiving circuit and a second power output circuit, the first power receiving circuit and the second power output of the first power supply unit and the second power supply The circuit is electrically connected, and the first power output circuit is electrically connected to the first power supply unit and the second power receiving circuit of the second power supply device. The step of the power sharing method includes: firstly, electrically connecting the first power supply unit with Second power supply unit. Next, the first power supply device and the second power supply device are activated. The first power supply unit provides a first power source to the second power receiving circuit of the second power supply device through the first power output circuit of the first power distribution unit, and the first power receiving circuit of the first power supply unit transmits The first power distribution unit receives a second power source provided by the second power output circuit of the second power supply device.

In summary, the power supply device, the power supply system, and the power sharing method having the power sharing function in the present case, through the power distribution unit configured by each power supply device, To supply power of the power supply device to at least another power supply device, the power supply unit of each power supply device can be utilized as a backup power source for adjacent or other power supply devices to achieve power sharing, management, and scheduling. purpose. In addition, with such a configuration, it is also possible to provide a power supply device that can reduce the size of the overall power supply device and reduce the cost, and can effectively manage and schedule the power supply to avoid an unexpected failure of the power supply of the electronic device.

1, 2, 3‧‧‧ power supply unit

11, 21‧‧‧Power supply unit

12, 22‧‧‧Power distribution unit

122, 222‧‧‧ power receiving circuit

1221‧‧‧First switching element

1222‧‧‧First monitoring component

124, 224‧‧‧ power output circuit

1241‧‧‧Second switching element

1242‧‧‧Second monitoring component

A1‧‧‧First status signal

A2‧‧‧ second status signal

C1, C2‧‧‧ server system

E1‧‧‧First power supply

E2‧‧‧second power supply

P1, P2‧‧‧ lines

S1~S4, S31~S33, S41~S43‧‧‧ method steps

FIG. 1 is a schematic diagram of an embodiment of a power supply device having a power sharing function according to the present invention.

Figure 2 is a circuit diagram of the embodiment of Figure 1.

FIG. 3 is a schematic diagram of a power supply system with a power sharing function in the present case.

FIG. 4 is still another schematic diagram of a power supply system having a power sharing function in the present case.

FIG. 5 is a flow chart of steps of the power sharing method of the present invention.

FIG. 6 is a flow chart of still another step of the power sharing method of the present invention.

Hereinafter, a power supply device and a power supply system having a power sharing function, and a power sharing method according to the present invention will be described with reference to the related drawings, wherein the same elements will be described with the same reference numerals. In addition, elements that are not directly related to the present invention are also not labeled or shown in the drawings.

Please refer to FIG. 1 and FIG. 2 first. FIG. 1 is a schematic diagram of an embodiment of a power supply device having a power sharing function, and FIG. 2 is a circuit diagram of the schematic diagram shown in FIG.

First, the power supply device 1 is used in combination with another power supply device 2, and the power supply device 1 is disposed in a different server system from the power supply device 2, and provides various components in the respective server systems during normal operation. The power supply required.

Referring to FIG. 1, the power supply device 1 of the present embodiment is disposed in the server system C1, and the power supply device 2 is disposed in the server system C2, and the power supply device 1 provides the server system C1 through the line P1. The power supply required for the operation of the component, and the power supply device 2 provides the power required for the operation of the components in the server system C2 via the line P2. In other embodiments, the power supply device 1 and the power supply device 2 can also be applied to a computer system or a computer system, and respectively provide various components in the computer system or the computer system for normal operation. The power required for the operation.

The power supply unit 11 of the power supply device 1 and the power supply unit 21 of the power supply device 2 can be used as a backup power source for each other's system in addition to the power supply required to supply the components of the server system in its own operation. However, the timing of its use as a backup power source can be adjusted according to different needs and settings.

The power supply device 1 includes a power supply unit 11 and a power distribution unit 12, and the power distribution unit 12 is electrically connected to the power supply unit 11. The power distribution unit 12 includes a power receiving circuit 122 and a power output circuit 124. Next, the power supply device 2 has a power supply unit 21 and a power distribution unit 22. The power distribution unit 22 also includes a power receiving circuit 222 and a power output circuit 224.

The power receiving circuit 122 of the power distribution unit 12 is electrically connected to the power supply unit 11 and the power output circuit 224 of the power distribution unit 22 of the power supply unit 2. The power receiving circuit 122 is configured to receive the second power source E2 provided by the power supply device 2, and is supplied to the server system C1 through the line P1. Similarly, the power output circuit 124 of the power distribution unit 12 is electrically connected to the power supply unit 11 and the power receiving circuit 222 of the power distribution unit 22 of the power supply unit 2. The power receiving circuit 222 is configured to provide the first power source E1 to the power supply device 2 and to the server system C2 via the line P2.

In an implementation, the power distribution units 12 and 22 can be electrically connected to the power supply devices 1 and 2 through a low-loss power supply line, and the power supply unit 11 and the power distribution unit 12 can be configured according to the circuit and the requirements of the product. For the two separately provided components, for example, the power distribution unit 12 can be an external control circuit board for use with the existing power supply unit 11, or the power supply unit 11 and the power distribution unit 12 can be integrated. As a single component. Of course, the power supply unit 21 and the power distribution unit 22 can also be two independently arranged components or a single component according to requirements.

In addition, the "electrical connection" described in the present specification may be a direct electrical connection or an indirect connection through other electronic components, and is not limited to a direct electrical connection. For example, the power receiving circuit 122 and the power supply unit 11 and the power output circuit 224 may be directly or indirectly connected.

When the power supply device 1 supplies the first power source E1 through the power distribution unit 12 To the power supply device 2 or the second power source E2 outputted by the power supply device 2, in order to ensure that each power supply device can normally provide the power required for operation in its own system, and avoid affecting another system or being Another system is affected. Thus, the power receiving circuit 122 and the power output circuit 124 of the power distribution unit 12 have a plurality of buffers, thereby effectively determining whether power is supplied or received.

Next, please refer to FIG. 2 together to further explain the manner in which the power supply unit 11 and the power distribution unit 12 determine that the first power source E1 and the second power source E2 are provided. The power receiving circuit 122 includes a first switching element 1221 and a first monitoring element 1222, and the first monitoring element 1222 is coupled to the first switching element 1221. The first monitoring component 1222 is configured to monitor the operation of the power supply unit 11 and generate a first control signal according to a first state signal A1 and a second state signal A2 output by the power supply unit 11. Here, the first state signal A1 represents the startup state of the power supply unit 11, and the second state signal A2 represents the level of the first power source provided by the power supply unit 11 (for example, may be a voltage level).

The "starting state" and the "first power source level" referred to herein are the operating states of the power supply unit 11 measured by the first monitoring component 1222, and the signals may be determined by the state signals according to different configurations. Whether the power supply unit 11 is stable can provide the state of the first power source E1. Therefore, according to different input state signals, the preset values set are also different. For example, the first power source E1 of the power supply unit 11 set in the present case must reach a rated voltage level of 90% to output. The second state signal A2; the power supply unit 11 is turned on to output the first state signal A1.

It should be noted that although the first control signal generated in this embodiment is a case where the first state signal A1 and the second state signal A2 are simultaneously matched. However, there may be embodiments in which only one of the first state signal A1 and the second state signal A2 is received, for example, the second state signal A2 representing only the level of the first power source is received to generate the first control signal. In addition, in the present embodiment, the first state signal A1 and the second state signal A2 are outputted by the power supply unit 11 as an example, and in other applications, the first state signal A1 or a second. The status signal A2 will be generated by other components in the system, for example, by setting a particular operational processor of the motherboard, or other monitoring circuitry or processing circuitry.

The first switching element 1221 is turned on according to the first control signal to make the server system The system C1 receives the second power source E2 provided by the power supply device 2. In terms of circuit structure, the power supply device 1 is configured to provide a power supply required for the operation of each component in the server system C1, and a second power source E2 received in parallel with the connection mode.

Referring to FIG. 2, in order to enable the power supply unit 11 to supply the first power source E1 to the power supply device 2 through the power distribution unit 12, and to prevent the power supply device 1 from supplying power beyond the rated power, affecting the operation of the power supply unit 12, the power distribution unit 12 The power output circuit 124 can also achieve the above purpose through a plurality of buffers.

For example, the power output circuit 124 can include a second monitoring component 1242 and a second switching component 1241. The second monitoring component 1242 is coupled to the power supply unit 11 and outputs a third state signal according to the level of the first power source E1. The second switching element 1241 is coupled to the second monitoring element 1242.

In other words, the second monitoring component 1242 is for monitoring the state of the first power source E1 provided by the power supply unit 11, and outputting the third state signal according to the power state thereof. If the power state is unstable, the second switching element 1241 will electrically disconnect the power supply device 1 from the power supply device 2 according to the third state signal. On the contrary, the second switching element 1241 is turned on, so that the power supply device 1 is electrically connected to the power supply device 2 .

The "third state signal" referred to herein is the operating state of the power supply unit 11 measured by the second monitoring component 1242, and may be a power supply stability condition (voltage level) and/or the power supply unit 11 according to different configurations. Current level and so on. Therefore, according to different second monitoring components 1242, different third state signals will be generated, and the preset values set are also different. For example, when the voltage level of the power supply unit 11 is lower than 90% of the rated voltage, the second switching element 1241 will turn off and stop supplying the first power source E1 to the power supply device 2.

In addition, in addition to the third state signal, the embodiment can further set that when the level of the first power source E1 provided reaches a first preset value, the power output circuit 124 outputs a notification signal to the power supply device 2, and After receiving the notification signal, the power supply device 2 enters the power saving mode or the shutdown mode. And a second preset value is further set. When the level of the first power source E1 reaches the second preset value, the second monitoring component 1242 outputs a third state signal, and the second switching component 1241 is turned off according to the third state signal. The distribution unit 12 stops supplying the first power source E1 to the power supply device 2.

For example, 95% of the standard voltage level can be set to the first preset value, and the standard voltage level is lower than 90%, and the second power supply device 1 outputs the first power source E1. The voltage level reaches the first preset value (ie, less than 95% of the standard voltage level), and the power output circuit 124 outputs a notification signal to notify the power supply device 2 to enter the power-saving mode or the shutdown mode (or prompt to prepare for shutdown) . When the voltage level of the first power source E1 outputted by the power supply device 1 reaches a second preset value, the second monitoring component 1242 outputs a third state signal, and the second switching component 1241 is turned off according to the third state signal, so that The power supply device 1 and the power supply device 2 are disconnected.

The case can also be matched with a human-machine interface (not shown), and the notification signal is displayed on the human-machine interface, and the user manually controls whether to stop supplying power to the power supply device 2 or turn off the power supply device 2.

The "standard voltage level" referred to above is a voltage level at which the power supply device 1 and the power supply device 2 are normally electrically connected and supplied and received. If the measured voltage level is lower than the standard voltage level, the power supply device 2 may not be able to supply power normally (in other words, the power supply of the power supply device 1 is increased), so the power supply device 1 and the power supply device should be first used. 2 Breaking or causing the power supply device 2 to enter the energy-saving mode or the shutdown mode to avoid sudden and unexpected shutdown of the power supply device 2, so that the data in the computer system or the server system is lost.

In addition to monitoring the voltage level, there may be an implementation aspect for monitoring the current level. If the current level is monitored, the second monitoring component 1242 may be a current sensor monitor with a BMC (baseboard monitor controller). And the management software, the current quantity level outputted by the power supply unit 11 to the power supply device 2 can be monitored immediately, and an output status signal is provided to the power distribution unit 12 according to the current amount level.

The possible implementation method is as follows: assuming that the maximum current level of the power supply unit 11 can be output to the power supply device 2 is 45A, the second preset value can be set to 45A, and the first preset value is set to 28A. And 39A. Therefore, when the current quantity level output by the power supply unit 11 is greater than 28A, the power output circuit 124 will provide a notification signal to the power supply device 2, so that the power supply device 2 enters the energy-saving mode, and can display an alert notification on the human-machine interface. . If the output current value is greater than 39A, the power output circuit 124 will again provide a notification signal to enable the power supply. Device 2 should enter shutdown mode. When the current value output by the power supply unit 11 reaches the second preset value, the second monitoring component 1242 will output a third state signal, the second switching component 1241 is turned off according to the third state signal, and the power supply unit 11 stops supplying power. Power supply device 2.

Alternatively, when the power supply unit 11 generates a warning message or an error message, the second monitoring component 1242 directly outputs a warning message or an error message to the third state signal to turn off the second switching component 1241 to power the power supply device 1. The supply unit 11 stops supplying power.

It should be noted that, although the drawing of the embodiment shows the condition that the standard voltage level, the current level, and the warning message of the power supply unit 11 are simultaneously monitored, the second monitoring element 1242 outputs the third status signal. The second switching element 1241 is turned off or turned on. However, there may be embodiments, and only one of them may be used.

Further, in the above description, the power supply device 1 is mainly described as the main body, but the power supply unit 21 and the power distribution unit 22 of the power supply device 2 are disposed, and the power supply unit 11 and the power distribution unit 12 of the power supply device 1 have their respective units. The operation between the power supply device 2 and the power supply device 1 is similar to that of the power supply device 1 and the power supply device 2, so that the power supply device 2 is no longer the main body. Narrative.

Therefore, with the hardware architecture described above, the power supply unit of each power supply device can be used as a backup power source for an adjacent or other power supply device, thereby effectively achieving power sharing and management. In addition, it should be specially stated that the power supply received by the power supply device from another power supply device can be directly supplied to various components in the system, and can also be used according to the application requirements of the product. In the case of power supply, the received power source is pre-stored in a power storage unit, and when the standby power source is needed, the power stored by the power storage unit is enabled, or the power supply device is only used as another under certain circumstances. The backup power source of the power supply device is, for example, a power source that is introduced to another power supply device when the power supply unit of the power supply device fails and power cannot be supplied.

Please continue to refer to FIG. 3 to FIG. 4 , which are two different schematic diagrams of the power supply system with power sharing function in this case.

1 and 2 illustrate a schematic diagram of electrical connection of two power supply devices, but The power supply device of the present invention is not limited to two power supply devices. 3 and 4 are schematic views of three power supply devices.

Referring first to FIG. 3, the power supply device 1 can supply the first power source of the power supply device 2 and receive the second power source of the power supply device 2. The power supply device 3 provides the first power source of the power supply device 2 and receives the second power source of the power supply device 2. In short, the power supply device 2 receives the power provided by the power supply devices 1, 3, and simultaneously supplies them to The power supply device 1, 3 is a power source. Therefore, the power supply device 2 should be configured with at least two power distribution units, and the two power distribution units will respectively correspond to the power distribution units of the power supply devices 1, 3, and can achieve effects similar to those of FIG.

It is to be noted that the present embodiment is similar to the power supply device 1 and the power supply device 2 of the foregoing embodiment, and is similar to the power supply device 1 and the power supply device 2 of the foregoing embodiment. They are set in different computer systems or server systems.

Please refer to FIG. 4 again, which is another schematic diagram of the power supply system having the power sharing function of the present invention. The difference from the embodiment of FIG. 3 is that each power supply device is configured with two power distribution units, and each power supply device is It is connected to the two power supply devices, and provides a power source and receives a power source to achieve effects similar to those of the foregoing two embodiments.

Finally, please refer to FIG. 5 and FIG. 6 together for a flow chart of the steps of the power sharing method of the present invention. The method is matched with at least two power supply devices. For convenience of description and understanding, the following description will be only described by a first power supply device and a second power supply device, and the first power supply device and the second power supply device are herein. The connection relationship and the mutual operation are similar to the power supply device 1 and the power supply device 2 of the foregoing embodiment, and the first and second power supply devices are substantially the same power supply device. The method steps may be applied in combination with any of the above embodiments, but are not limited to the above embodiments.

In addition, the first power supply device includes a first power supply unit and a first power distribution unit. The second power supply unit includes a second power supply unit and a second power distribution unit, and the first power supply unit is electrically connected to the first power distribution unit, and the second power supply unit is electrically connected to the second power distribution unit. . The first power distribution unit includes a first power receiving circuit and a first power output circuit, and the second power distribution unit includes a second power receiving Road and second power output circuit. The first power receiving circuit is electrically connected to the first power supply unit and the second power output circuit of the second power supply device, and the first power output circuit and the first power supply unit and the second power receiving circuit of the second power supply device Electrical connection. The first power receiving circuit includes a first switching component and a first monitoring component, and the first power output circuit includes a second monitoring component and a second switching component.

Referring to FIG. 5, the step of the power sharing method of the present invention includes at least: electrically connecting the first power supply unit and the second power supply unit (step S1), for example, taking the power supply device 1 and the power supply device as an example in FIG. 2 Electrically connect with the power cord. The first power supply device and the second power supply device are activated (step S2). Then, the first power supply unit supplies the first power source to the second power receiving circuit of the second power supply device through the first power output circuit of the first power distribution unit (step S3); and the first power supply unit transmits the first power source The first power receiving circuit of the distribution unit receives the second power supplied from the second power output circuit of the second power supply device (step S4).

Referring to FIG. 6, step S3 of FIG. 6 further includes: receiving, by the first monitoring component, the first state signal and the second state signal (step S31), the first state signal may be an activated state of the power supply unit, and the second state The signal may be the level of the first power source provided by the power supply unit. Then, the first monitoring component generates the first control signal according to the first state signal and the second state signal, and transmits the first control signal to the first switching component (step S32). The first control signal is transmitted to the first switching element. Finally, the first switching element is turned on according to the first control signal, so that the first power supply device receives the second power supply provided by the second power supply device (step S33). Taking FIG. 2 as an example, the first switching element 1221 is turned on according to the first control signal, so that the power supply device 1 receives the second power supply provided by the power supply device 2.

Step S4 of FIG. 6 further includes: outputting, by the second monitoring component, a third state signal according to the level of the first power source (step S41), and receiving, by the second switching component, the third state signal (step S42). The second switching element is turned on or off in accordance with the third state signal (step S43).

In addition, in the present embodiment, the first preset value and the second preset value are set in the embodiment shown in FIG. 2, and the step further includes: when the level of the first power source reaches the first preset The value, the power output circuit outputs a notification signal to another power supply device, causing the other power supply device to activate the power save mode or the power off mode. And when the level of the first power source reaches the second preset The value outputs a third state signal, the second switching element is turned off according to the third state signal, and the power distribution unit stops providing the first power source to the other power supply device.

It is to be noted that the power sharing method of the present invention mainly refers to the state of the first power supply device, but the method steps of the second power supply device are similar to the first power supply device, for example, the second power supply unit transmits the second power supply. The distribution unit provides a second power source to the first power supply device, and the second power supply unit receives a first power source provided by the first power supply device through the second power distribution unit. The steps of these second power supply devices will not be repeated here.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or changes made to the spirit and scope of this case shall be included in the scope of the appended patent application.

1, 2‧‧‧Power supply unit

11, 21‧‧‧Power supply unit

12, 22‧‧‧Power distribution unit

122, 222‧‧‧ power receiving circuit

124, 224‧‧‧ power output circuit

C1, C2‧‧‧ server system

E1‧‧‧First power supply

E2‧‧‧second power supply

P1, P2‧‧‧ lines

Claims (10)

A power supply device having a power sharing function, coupled with at least another power supply device, the power supply device comprising: a power supply unit; and a power distribution unit coupled to the power supply unit, and the power distribution unit includes a power receiving circuit and a power output circuit for electrically connecting to a power output circuit of the other power supply device, the power output circuit for receiving a power receiving circuit with the other power supply device An electrical connection unit, wherein the power supply unit supplies a first power source to the other power supply device through the power output circuit of the power distribution unit, and the power receiving circuit of the power distribution unit receives the other power supply device Providing a second power source, when the level of the first power source reaches a first preset value, the power output circuit outputs a notification signal to the another power supply device, so that the another power supply device activates an energy-saving mode Or a shutdown mode. The power supply device of claim 1, wherein the power receiving circuit of the power distribution unit comprises: a first switching component coupled to the power supply unit; and a first monitoring component, and the power supply The first switching element is coupled to the first switching signal, and generates a first control signal according to the first state signal and the second state signal. The first switching component is turned on according to the first control signal, so that the power source is turned on. The supply device receives the second power source provided by the other power supply device. The power supply device of claim 2, wherein the first status signal represents an activation state of the power supply unit, and the second status signal represents a level of the first power source of the power supply unit. The power supply device of claim 2, wherein the power output circuit of the power distribution unit comprises: a second monitoring component coupled to the power supply unit and output according to the level of the first power source a third state signal; a second switching component coupled to the second monitoring component; wherein the second switching component is turned on or off according to the third state signal. The power supply device of claim 4, wherein when the level of the first power source reaches a second preset value, the second monitoring component outputs the third state signal, and the second switching component is based on The third state signal is turned off, and the power distribution unit stops providing the first power source to the other power supply device. A power supply system having a power sharing function, comprising a plurality of power supply devices, wherein the power supply devices are electrically connected to each other, and each of the power supply devices includes: a power supply unit; and a power distribution unit including a power supply a receiving circuit and a power output circuit electrically connected to the power supply unit and a power output circuit of a power distribution unit of the other power supply device, the power output circuit and the power supply unit and the other a power receiving circuit of the power distribution unit of the power supply device is electrically connected; wherein the power supply unit provides a first power source to another power supply device through the power output circuit of the power distribution unit, the power distribution The power receiving circuit of the unit receives a second power supply provided by the other power supply device. When the level of the first power source reaches a first preset value, the power output circuit outputs a notification signal to the other power source. Supplying the device to enable the other power supply device to activate an energy saving mode or a shutdown mode A power supply sharing method of a power supply device, coupled with a first power supply device and a second power supply device, and the first power supply device includes a first power supply unit and a first power distribution unit, the second The power supply device includes a second power supply unit and a second power distribution unit, wherein the first power distribution unit includes a first power receiving circuit and a first power output circuit, and the second power distribution unit includes a second a power receiving circuit and a second power output circuit, wherein the first power receiving circuit is electrically connected to the first power supply unit and the second power output circuit of the second power supply device, the first power output circuit and the The first power supply unit and the second power receiving circuit of the second power supply device are electrically connected. The step of the power sharing method includes: electrically connecting the first power supply unit and the second power supply unit; a first power supply device and the second power supply device; the first power supply unit transmits the first power distribution sheet Providing a first power to the second power of the second power supply circuit means receiving the first power output circuit; and The first power supply unit receives a second power supply provided by the second power output circuit of the second power supply device through the first power receiving circuit of the first power distribution unit; when the first power source is in the position When the first preset value is reached, the first power output circuit outputs a notification signal to the second power supply device, so that the second power supply device activates a power saving mode or a shutdown mode. The power sharing method of claim 7, wherein the first power receiving circuit comprises a first switching component and a first monitoring component, and the step of the power sharing method further comprises: receiving, by the first monitoring component a first state signal and a second state signal; the first monitoring component generates a first control signal according to the first state signal and the second state signal, and transmits the first control component to the first switching component; and the first switching component The first power supply device is configured to receive the second power source provided by the second power supply device according to the first control signal being turned on. The power sharing method of claim 7, wherein the first power output circuit of the first power distribution unit comprises a second monitoring component and a second switching component, and the step of the power sharing method further comprises: The second monitoring component outputs a third state signal according to the level of the first power source; the second switching component receives the third state signal; and the second switching component is turned on or off according to the third state signal. The power sharing method of claim 9, further comprising: when the level of the first power source reaches a second preset value, the second monitoring component outputs the third state signal; the second switching component Turning off according to the third state signal; and the first power distribution unit stops providing the first power source to the second power supply device.