Power supply equipment and power distribution device thereof

Abstract

The invention discloses power supply equipment and a power distribution device thereof, which are applied to the technical field of power supplies, and are characterized in that a first power supply port and a second power supply port of a power supply switching unit are respectively connected with a first power supply line and a second power supply line, and output ports serve as power supply ports of K parallel power supply modules in load equipment; k is a positive integer and is greater than or equal to N, and N is the minimum number of power supply modules required by the load equipment; the detection control unit is used for controlling the power supply switching unit to use the power supply line with the normal power supply state to supply power to the load equipment when the power supply state of a single power supply line in the first power supply line and the second power supply line is detected to be abnormal; and the temporary power supply unit is used for supplying power to the load equipment under the control of the detection control unit in the process of switching the used power supply line by the power supply switching unit. By applying the scheme of the invention, the reliability of power supply can be effectively guaranteed, the accuracy requirement of wiring is reduced, and the cost and the space layout difficulty are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a power supply device and a power distribution device thereof. Background Art

[0002] At present, the reliability requirements for servers are constantly increasing. Power supply reliability is an important part of reliable operation of servers, and redundant design is usually adopted. Figure 1 , which is a schematic diagram of the current redundant power supply design for servers. The server needs to meet the dual power supply redundancy of A and B. Figure 1 In the server, power distribution device A and power distribution device B are set up to connect power supply A and power supply B respectively, so that when power supply A is abnormal or under maintenance, power supply B can still maintain the power supply required by the server. Multiple PSUs (Power Supply Units, power modules) are usually required in the server, such as Figure 1 In the example, take server 1 as an example. Server 1 requires 3 PSUs to run. Figure 1 In the figure, they are marked as power supply A, power supply B and power supply C respectively. In order to meet the power supply redundancy, it is necessary to connect 3 PSUs to power distribution device A and 3 PSUs to power distribution device B ( Figure 1 These six PSUs are connected in parallel so that if power supply A and power supply B are both normal, any damage to three PSUs will not affect the operation of the server.

[0003] for Figure 1 Such N+N and A+B redundant power supply design (N is the minimum number of power modules required by the server, Figure 1 In the example of N=3, it can be seen that the power supply reliability of the server can be effectively guaranteed. However, as the power of server applications and core server computing units such as CPU (Central Processing Unit) / GPU (Graphics Processing Unit) / memory / hard disk gradually increases, Figure 1 This redundant power supply requirement will bring great power supply pressure. For example, a single server needs 3 PSUs to provide a total of 10KW of power. Figure 1 A single server in the system needs to be equipped with a 20KW redundant power supply, which means that 6 PSUs are required to meet the requirements. Figure 1 The PSU redundancy and power supply redundancy are relatively expensive. And considering the power supply cables, module space requirements and other factors, Figure 1 This design is becoming increasingly challenging in server power supply applications where power requirements are increasing. Figure 1Such a design requires accuracy in wiring. Figure 1 Taking server 1 as an example, 3 PSUs need to be connected to power distribution device A, and the other 3 PSUs need to be connected to power distribution device B. For example, if 4 PSUs are connected to power distribution device A, and the other 2 PSUs are connected to power distribution device B, the wiring is incorrect because if power supply A is abnormal, power supply B cannot meet the power supply needs of the server.

[0004] In summary, how to effectively ensure power supply reliability while reducing wiring accuracy requirements, reducing costs and spatial layout difficulty is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The object of the present invention is to provide a power supply device and a power distribution device thereof, so as to effectively ensure the reliability of power supply while reducing the accuracy requirements of wiring, and reducing the cost and difficulty of spatial layout.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a power distribution device, comprising: a power supply switching unit, a detection control unit and a temporary power supply unit;

[0008] The first power supply port and the second power supply port of the power supply switching unit are connected to the first power supply line and the second power supply line respectively, and the output port serves as the power supply port of K parallel power modules in the load device, so that the first power supply line or the second power supply line supplies power to the load device through the power supply switching unit; wherein K is a positive integer and K≥N, and N is the minimum number of power modules required by the load device;

[0009] The detection control unit is connected to the power supply switching unit, and is used to control the power supply switching unit to use the power supply line with normal power supply state to supply power to the load device when it is detected that the power supply state of a single power supply line between the first power supply line and the second power supply line is abnormal;

[0010] The temporary power supply unit is connected to the detection control unit, and is used to supply power to the load device under the control of the detection control unit when the power supply switching unit switches the power supply line used.

[0011] On the other hand, the power supply switching unit includes a first switch, a second switch, a third switch and a fourth switch; the first power supply port includes a first live wire terminal and a first neutral wire terminal, the second power supply port includes a second live wire terminal and a second neutral wire terminal, and the output port includes a live wire output terminal and a neutral wire output terminal;

[0012] The first end of the first switch serves as the first live wire terminal of the power supply switching unit, the first end of the second switch serves as the first neutral wire terminal of the power supply switching unit, the first end of the third switch serves as the second live wire terminal of the power supply switching unit, and the first end of the fourth switch serves as the second neutral wire terminal of the power supply switching unit;

[0013] The second end of the first switch is connected to the second end of the third switch, and the connecting end is connected to the live line output end; the second end of the third switch is connected to the second end of the fourth switch, and the connecting end is connected to the neutral line output end.

[0014] On the other hand, the on-off state of the first switch is interlocked with the on-off state of the third switch, and the on-off state of the second switch is interlocked with the on-off state of the fourth switch;

[0015] The on-off state of the first switch is always consistent with the on-off state of the second switch, and the on-off state of the third switch is always consistent with the on-off state of the fourth switch.

[0016] On the other hand, it also includes:

[0017] A surge protection circuit is arranged between the connection end of the first switch and the third switch and the live wire output end and connected to the detection control unit, and is used to suppress surge current when the load device is powered on and started, and when the power supply switching unit switches the power supply line used.

[0018] On the other hand, the surge protection circuit includes: a fifth switch, a sixth switch, a first resistor and a second resistor; the resistance value of the second resistor is positively correlated with its own temperature;

[0019] The first end of the fifth switch is respectively connected to the first end of the second resistor, the first end of the sixth switch, and the connection end of the first switch and the third switch; the second end of the fifth switch is connected to the first end of the first resistor;

[0020] The second end of the first resistor is connected to the second end of the second resistor and the second end of the sixth switch respectively, and the connecting end is connected to the live wire output end;

[0021] Wherein, when the detection control unit is not powered, the fifth switch and the sixth switch are both in a normally open state;

[0022] The detection control unit is also used for:

[0023] When the load device is powered on and started, the detection control unit controls the fifth switch to be turned on after the first time period when the fifth switch is powered on, and controls the fifth switch to be turned off and the sixth switch to be turned on after the second time period when the fifth switch is turned on;

[0024] When it is detected that the power supply state of a single power supply line among the first power supply line and the second power supply line is abnormal, the sixth switch is controlled to be turned off, and after the first switch, the second switch, the third switch and the fourth switch complete the state switching for a first time period, the fifth switch is controlled to be turned on, and after the fifth switch is turned on for a second time period, the fifth switch is controlled to be turned off and the sixth switch is controlled to be turned on.

[0025] On the other hand, the fifth switch includes a first transistor and a second transistor connected in reverse series, and the sixth switch is a controlled switch of a relay.

[0026] On the other hand, it also includes:

[0027] A seventh switch provided between the live wire output terminal and the surge protection circuit:

[0028] an eighth switch provided between a connection terminal of the second switch and the fourth switch and the neutral line output terminal;

[0029] Wherein, when the detection control unit is not powered, the seventh switch and the eighth switch are both in a normally open state;

[0030] The detection control unit is also used for:

[0031] When the load device is powered on and started, the detection control unit controls the seventh switch and the eighth switch to be turned on after it is powered on;

[0032] When it is detected that the power supply state of a single power supply line among the first power supply line and the second power supply line is abnormal, the seventh switch and the eighth switch are controlled to be turned off, and after the first switch, the second switch, the third switch and the fourth switch complete the state switching, the seventh switch and the eighth switch are controlled to be turned on.

[0033] On the other hand, it also includes:

[0034] An auxiliary power supply unit connected to the power supply switching unit, the detection control unit and the temporary power supply unit, and used to supply power to the power supply switching unit, the detection control unit and the temporary power supply unit;

[0035] The auxiliary power supply unit is connected to the first power supply line and the second power supply line respectively to obtain power through the first power supply line and / or the second power supply line.

[0036] On the other hand, it also includes a communication unit connected to the detection control unit;

[0037] The detection control unit is also used for:

[0038] When no switching instruction is received through the communication unit, and when the power supply states of the first power supply line and the second power supply line are both normal, controlling the power supply switching unit according to the data in the first storage medium to select the power supply line used by the power supply switching unit;

[0039] When a switching instruction is received through the communication unit, when the power supply states of the first power supply line and the second power supply line are both normal, the power supply switching unit is controlled according to the switching instruction to select the power supply line used by the power supply switching unit.

[0040] In a second aspect, the present invention provides a power supply device, comprising the power distribution device as described above.

[0041] By applying the technical solution provided in the embodiment of the present invention, it is not necessary to set up two power distribution devices as in the traditional solution, but a redundant power supply design of A-way + B-way can be realized through a single power distribution device. Specifically, the power distribution device includes: a power supply switching unit, a detection control unit and a temporary power supply unit. The first power supply port and the second power supply port of the power supply switching unit are respectively connected to the first power supply line and the second power supply line, and the output port serves as the power supply port of K parallel power modules in the load device, so that the first power supply line or the second power supply line can supply power to the load device through the power supply switching unit. The detection control unit can detect the power supply status of the first power supply line and the second power supply line. If the power supply status of one of the two power supply lines is abnormal, the detection control unit will control the power supply switching unit to use the power supply line with normal power supply status to power the load device, thereby realizing redundant power supply of A-way + B-way of the load device. It can also be seen that, since at the same time, only the electric energy from a single power supply line needs to be provided to the load device through the power supply switching unit, only K parallel power modules need to be set in the load device, K ≥ N, N is the minimum number of power modules required by the load device, that is, K is required to be equal to 2N, which reduces the cost and spatial layout difficulty of the present application. In addition, since the K parallel power modules in the load device are all connected to the output port of the power supply switching unit, the present application reduces the accuracy requirements for wiring, and wiring errors are not prone to occur.

[0042] Furthermore, considering that in the present application, at the same time, the electric energy from a single power supply line is provided to the load device through the power supply switching unit, the power supply switching unit must be able to switch the power supply line under the control of the detection control unit. Since the switching process is time-consuming, in order to ensure the power supply during the switching process, a temporary power supply unit is provided in the power distribution device of the present application. The temporary power supply unit can supply power to the load device under the control of the detection control unit during the process of the power supply switching unit switching the power supply line used, thereby ensuring the power supply reliability of the load device during the switching process.

[0043] In summary, the present application scheme can effectively ensure power supply reliability, while also reducing wiring accuracy requirements, and reducing costs and spatial layout difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A schematic diagram of the structure of the current redundant power supply design for servers;

[0046] Figure 2 A schematic diagram of the structure of a power distribution device provided in a specific embodiment of the present invention;

[0047] Figure 3 A schematic diagram of a structure of a power distribution device connected to a server provided in a specific embodiment of the present invention;

[0048] Figure 4 A schematic diagram of the structure of a power supply switching unit in a power distribution device provided in a specific embodiment of the present invention;

[0049] Figure 5 A schematic diagram of the structure of a power distribution device provided in another specific embodiment of the present invention. DETAILED DESCRIPTION

[0050] The core of the present invention is to provide a power supply device and a power distribution device thereof, which can effectively ensure the reliability of power supply, while also reducing the accuracy requirements of wiring, and reducing the cost and difficulty of space layout.

[0051] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0052] Please refer to Figure 2 , Figure 2 It is a schematic diagram of the structure of a power distribution device provided in a specific embodiment of the present invention. The power distribution device may include: a power supply switching unit 10, a detection control unit 20 and a temporary power supply unit 30.

[0053] The first power supply port and the second power supply port of the power supply switching unit 10 are connected to the first power supply line and the second power supply line respectively, and the output port serves as the power supply port of K parallel power modules in the load device, so that the first power supply line or the second power supply line supplies power to the load device through the power supply switching unit 10; wherein K is a positive integer and K≥N, and N is the minimum number of power modules required by the load device;

[0054] The detection control unit 20 is connected to the power supply switching unit 10, and is used to control the power supply switching unit 10 to use the power supply line with normal power supply state to supply power to the load device when it is detected that the power supply state of a single power supply line among the first power supply line and the second power supply line is abnormal;

[0055] The temporary power supply unit 30 is connected to the detection control unit 20 and is used to supply power to the load device under the control of the detection control unit 20 when the power supply switching unit 10 switches the power supply line used.

[0056] In the solution of the present application, a redundant power supply design of path A+path B can be realized through a single power distribution device. Specifically, the power distribution device needs to be provided with a power supply switching unit 10, a detection control unit 20 and a temporary power supply unit 30.

[0057] The power supply switching unit 10 has a first power supply port for connecting to a first power supply line. Since AC power is usually used, the first power supply line usually includes a neutral line and a live line. The power supply switching unit 10 also has a second power supply port for connecting to a second power supply line. Similarly, the second power supply line usually includes a neutral line and a live line.

[0058] The output port of the power supply switching unit 10 needs to be used as the power supply port of the load device, and at the same time, the power supply line used by the power supply switching unit 10 is either the first power supply line or the second power supply line. Therefore, the power supply switching unit 10 can choose to connect its first power supply port with its output port, so that the first power supply line supplies power to the load device through the power supply switching unit 10, or it can choose to connect its second power supply port with its output port, so that the second power supply line supplies power to the load device through the power supply switching unit 10. As for which power supply line is specifically selected to power the load device, it can be controlled by the detection control unit 20.

[0059] The detection control unit 20 is connected to the power supply switching unit 10, for example, it can be specifically connected to the relevant switches in the power supply switching unit 10, so as to switch and control the power supply line currently used by the power supply switching unit 10. The detection control unit 20 can detect the power supply status of the first power supply line and the second power supply line, and it can be understood that when the power supply status of the first power supply line and the second power supply line are both normal, the detection control unit 20 can arbitrarily select one of the power supply lines to power the load device according to actual needs. When the power supply status of a single power supply line among the first power supply line and the second power supply line is abnormal, the detection control unit 20 needs to control the power supply switching unit 10 to use the power supply line with a normal power supply status to power the load device.

[0060] When the detection control unit 20 detects whether the power supply status of the first power supply line and the second power supply line is normal, specific detection indicators can be set and adjusted according to actual needs. For example, whether the power supply status of the power supply line is normal is determined by judging whether the voltage is within a set voltage range, or whether the power supply status of the power supply line is normal is determined by judging whether the current is within a set current range. In other implementations, a more accurate determination method can be designed according to actual needs.

[0061] Considering that if the power supply line used by the power supply switching unit 10 is to be switched, the switching process is time-consuming, so a temporary power supply unit 30 is provided in the present application scheme, and the power output end of the temporary power supply unit 30 needs to be connected to the output port of the power supply switching unit 10, that is, connected to the power supply port of the load device, so that in the process of the power supply switching unit 10 switching the power supply line used, the temporary power supply unit 30 can supply power to the load device under the control of the detection control unit 20.

[0062] The load device described in the present application may generally be a server, in which K parallel power modules, i.e., K parallel PSUs, are provided, and the electric energy of the K parallel power modules can all be derived from the output port of the power supply switching unit 10. And it can be seen that, since at the same time, only the electric energy from a single power supply line needs to be provided to the load device through the power supply switching unit 10, the number K of parallel power modules required to be set in the load device is required to be K≥N, where N is the minimum number of power modules required by the load device, that is, it does not require K to be equal to 2N as in the traditional solution, which reduces the cost and spatial layout difficulty of the solution of the present application.

[0063] For example, if the minimum number of power modules required by a server is 3, that is, N=3, then after adopting the power distribution device of the present application, at least 3 power modules need to be set in the server. Of course, in actual applications, considering that the power module may be damaged, it is usually set to K=N+1 or K=N+2, so that the power modules in the server have a certain redundancy. That is to say, compared with the design that requires at least 2N power modules in the traditional solution, the present application solution can save 1 to N power modules. Figure 3 In the example, after adopting the power distribution device of the present application solution, in order to ensure that the power modules in the server have a certain redundancy, 4 power modules are set in a single server (K=N+1 in this case). Figure 1 The design of 6 power modules saves 2 power modules.

[0064] The specific structure of the power supply switching unit 10 can be set and adjusted according to actual needs, and can usually be implemented by a switch. Figure 4 In this embodiment, the power supply switching unit 10 may include a first switch S1, a second switch S2, a third switch S3 and a fourth switch S4; the first power supply port includes a first live wire terminal and a first neutral wire terminal, the second power supply port includes a second live wire terminal and a second neutral wire terminal, and the output port includes a live wire output terminal and a neutral wire output terminal;

[0065] The first end of the first switch S1 serves as the first live wire terminal of the power supply switching unit 10, the first end of the second switch S2 serves as the first neutral wire terminal of the power supply switching unit 10, the first end of the third switch S3 serves as the second live wire terminal of the power supply switching unit 10, and the first end of the fourth switch S4 serves as the second neutral wire terminal of the power supply switching unit 10;

[0066] The second end of the first switch S1 is connected to the second end of the third switch S3 , and the connection end is connected to the live line output end; the second end of the third switch S3 is connected to the second end of the fourth switch S4 , and the connection end is connected to the neutral line output end.

[0067] In this embodiment, the first live wire terminal and the first neutral wire terminal of the power supply switching unit 10 can be connected to the live wire and the neutral wire of the first power supply line respectively, and accordingly, the second live wire terminal and the second neutral wire terminal of the power supply switching unit 10 can be connected to the live wire and the neutral wire of the second power supply line respectively.

[0068] It can be seen that when the first switch S1 and the second switch S2 are turned on, and the third switch S3 and the fourth switch S4 are turned off, the power supply switching unit 10 can use the first power supply line to power the load device. Correspondingly, in this embodiment, if the first switch S1 and the second switch S2 are turned off, and the third switch S3 and the fourth switch S4 are turned on, the power supply switching unit 10 can use the second power supply line to power the load device. That is to say, in this embodiment, the detection control unit 20 can determine which power supply line the power supply switching unit 10 is currently using to power the load device by controlling the on and off states of the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4, that is, it can realize the switching of the power supply line used by the power supply switching unit 10.

[0069] The specific switch types of the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 can be set and adjusted according to actual needs as long as the functional requirements of the present application can be achieved.

[0070] In a specific embodiment of the present invention, the on-off state of the first switch S1 is interlocked with the on-off state of the third switch S3, and the on-off state of the second switch S2 is interlocked with the on-off state of the fourth switch S4;

[0071] The on-off state of the first switch S1 is always consistent with the on-off state of the second switch S2, and the on-off state of the third switch S3 is always consistent with the on-off state of the fourth switch S4.

[0072] This implementation method takes into account that for the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4, a variety of circuit topologies can be combined by switching their respective on-off states, but the present application solution requires that the on-off state of the first switch S1 is always opposite to the on-off state of the third switch S3. Therefore, in this implementation method, an interlocking design is adopted for the on-off state of the first switch S1 and the on-off state of the third switch S3, that is, as long as the first switch S1 is turned on, the third switch S3 will be turned off, and vice versa, as long as the first switch S1 is turned off, the third switch S3 will be turned on. There are many specific ways to achieve interlocking, which can be achieved through the setting of software programs, or through the mechanical structure design of hardware to achieve the interlocking of the on-off states of the two. Similarly, the present application solution requires that the on-off state of the second switch S2 is always opposite to the on-off state of the fourth switch S4. Therefore, for the on-off state of the second switch S2 and the on-off state of the fourth switch S4, interlocking can also be achieved through software / hardware functional design.

[0073] Furthermore, the first switch S1 and the second switch S2 are both connected to the first power supply line, so in this embodiment, the on-off state of the first switch S1 and the on-off state of the second switch S2 can be always kept consistent through the functional design of software / hardware. Similarly, the third switch S3 and the fourth switch S4 are both connected to the second power supply line, so in this embodiment, the on-off state of the third switch S3 and the on-off state of the fourth switch S4 can be always kept consistent through the functional design of software / hardware.

[0074] In practical applications, the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 in this embodiment can be implemented by a double-pole double-hysteresis relay to realize the above-mentioned interlocking design, so that at the same time, only a single power supply line is turned on, and the isolation between the two power supply lines is ensured.

[0075] For example, in one scenario, when the controlled coil of a double-pole, double-hysteresis magnetic latching relay is energized, the first switch S1 and the second switch S2, which are the controlled branches of the relay, will both be turned on, and the third switch S3 and the fourth switch S4 will both be turned off. When the controlled coil of the relay loses power, the first switch S1 and the second switch S2 will both be turned off, and the third switch S3 and the fourth switch S4 will both be turned on. Figure 4 In the example, a relay is used to implement the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 in this implementation mode, and the relay is recorded as relay A.

[0076] In a specific embodiment of the present invention, an overcurrent protection circuit may be provided in the power supply switching unit 10, which is used to disconnect the power supply of the power supply switching unit 10 to the load device when the power supply line used by the power supply switching unit 10 has an overcurrent. The specific structure of the overcurrent protection circuit may be set and adjusted according to actual needs, and it only needs to be able to effectively play the role of overcurrent protection. For example, Figure 4 In the implementation manner, a first fuse F1 connected in series with the first switch S1, a second fuse F2 connected in series with the second switch S2, a third fuse F3 connected in series with the third switch S3, and a fourth fuse F4 connected in series with the fourth switch S4 can be respectively set to effectively achieve the effect of overcurrent protection.

[0077] In a specific embodiment of the present invention, it may also include:

[0078] The surge protection circuit is arranged between the connection end of the first switch S1 and the third switch S3 and the live wire output end and connected to the detection control unit 20, and is used to suppress surge current when the load device is powered on and started, and when the power supply switching unit 10 switches the power supply line used.

[0079] This implementation takes into account that when the power is turned on and the power supply switching unit 10 of the present application switches the power supply line used, a large surge current may occur due to capacitor components in the subsequent circuit. In this regard, in this implementation, a surge protection circuit is provided between the connection end of the first switch S1 and the third switch S3 and the live line output end, so that the surge current can be suppressed under the control of the detection control unit 20.

[0080] The specific structure of the surge protection circuit can be set according to actual needs. For example, a simple way is to form a surge protection circuit by connecting a switch and a resistor in parallel. When the load device is powered on and started, and when the power supply switching unit 10 switches the power supply line used, the switch is controlled to be disconnected. Due to the setting of the resistor, the surge current can be effectively suppressed. After waiting for a certain period of time, the switch can be closed to bypass the resistor.

[0081] In a specific implementation of the present invention, the surge protection circuit may include: a fifth switch, a sixth switch S6, a first resistor R1 and a second resistor R2; the resistance value of the second resistor R2 is positively correlated with its own temperature;

[0082] The first end of the fifth switch is respectively connected to the first end of the second resistor R2, the first end of the sixth switch S6, and the connection end of the first switch S1 and the third switch S3; the second end of the fifth switch is connected to the first end of the first resistor R1;

[0083] The second end of the first resistor R1 is connected to the second end of the second resistor R2 and the second end of the sixth switch S6 respectively, and the connecting end is connected to the live wire output end;

[0084] Wherein, when the detection control unit 20 is not powered, the fifth switch and the sixth switch S6 are both in a normally open state;

[0085] The detection control unit 20 is also used for:

[0086] When the load device is powered on and started, after the detection control unit 20 itself is powered for a first time, the fifth switch is controlled to be turned on, and after the fifth switch is turned on for a second time, the fifth switch is controlled to be turned off and the sixth switch S6 is controlled to be turned on;

[0087] When it is detected that the power supply state of a single power supply line among the first power supply line and the second power supply line is abnormal, the sixth switch S6 is controlled to be turned off, and after the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 complete the state switching for a first time period, the fifth switch is controlled to be turned on, and after the fifth switch is turned on for a second time period, the fifth switch is controlled to be turned off and the sixth switch S6 is controlled to be turned on.

[0088] In this implementation, a two-stage surge suppression design is adopted to effectively ensure the suppression effect of surge current. Specifically, in this implementation, the second resistor R2 is the first-stage surge suppression. Take the load device power-on startup as an example to illustrate. When the detection control unit 20 is not powered, the fifth switch and the sixth switch S6 are both in the normally open state. Connect the power distribution device to the first power supply line and the second power supply line, and connect the power distribution device to the load device, the load device can be powered on and started, and the detection control unit 20 will also be powered. At the same time, the current from the power supply line will be immediately transmitted to the load device through the second resistor R2. Due to the existence of the second resistor R2, the current transmitted to the load device at this time will not be too large, and the resistance value of the second resistor R2 is also positively correlated with its own temperature, that is, as the temperature rises, the current flowing through the second resistor R2 will be further reduced. After the detection control unit 20 is powered for the first time, it will automatically control the fifth switch to be turned on to allow a larger current to be transmitted to the load device through the branch where the fifth switch and the first resistor R1 are located. The fifth switch and the first resistor R1 are the second-level surge suppression. The resistance value of the first resistor R1 is usually lower than that of the second resistor R2. After the second time period when the fifth switch is turned on, the fifth switch is controlled to be turned off, and the sixth switch S6 is controlled to be turned on to avoid the power loss of the first resistor R1. It can be seen that through this two-level surge suppression design, the current can gradually increase, effectively ensuring the suppression effect of the surge current. Compared with the simple surge protection circuit above, this implementation method can make the current more stable, that is, when the load device is powered on and started, the power supply current gradually increases, and it is difficult for surge current to occur.

[0089] When it is necessary to switch the power supply line used by the power supply switching unit 10, the surge current can also be suppressed by the surge protection circuit. Specifically, when it is detected that the power supply state of a single power supply line among the first power supply line and the second power supply line is abnormal, it is necessary to control the sixth switch S6 to be turned off, and then the power supply line used by the power supply switching unit 10 can be switched. In this embodiment, the on-off state of the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 is switched. After the switching is completed, similar to the above, the current is transmitted to the load device through the second resistor R2 at the first time. Due to the existence of the second resistor R2, the current transmitted to the load device at this time will not be too large, and the resistance value of the second resistor R2 is positively correlated with its own temperature. As the temperature rises, the current flowing through the second resistor R2 will decrease. After the first duration of the switching is completed, the power supply switching unit 10 automatically controls the fifth switch to be turned on, so that a larger current can be transmitted to the load device through the branch where the fifth switch and the first resistor R1 are located. After the fifth switch is turned on for the second time, the fifth switch is controlled to be turned off, and the sixth switch S6 is controlled to be turned on to avoid the power loss of the first resistor R1. It can be seen that when the power supply line used by the power supply switching unit 10 is switched, the current can also be gradually increased through this two-stage surge suppression design, effectively ensuring the surge current suppression effect. Compared with the simple surge protection circuit above, the current stability in this implementation is higher, so that when the power supply line used by the power supply switching unit 10 is switched, no surge current will occur.

[0090] The specific forms of the fifth switch and the sixth switch S6 can be set and adjusted according to actual needs. For example, in a specific embodiment of the present invention, the fifth switch may include a first transistor and a second transistor in reverse series, and the sixth switch S6 is a controlled switch of a relay.

[0091] This implementation method takes into account that in normal operation, the sixth switch S6 is in the on state. In order to ensure low conduction energy consumption, a controlled switch of a relay is used as the sixth switch S6 in the present application. As analyzed above, the fifth switch acts in the second-level surge suppression process. Considering that the current actually rises gradually when the transistor is powered on, it is beneficial to suppress the surge current to a certain extent. Therefore, the fifth switch of the present application can be implemented based on a transistor.

[0092] In addition, considering that transistors usually have body diodes, in order to ensure that no current flows through the fifth switch when the fifth switch is turned off, in this implementation, the fifth switch adopts a design of a first transistor and a second transistor connected in reverse series. For example, the first transistor and the second transistor can both be MOS transistors. Figure 4In the embodiment of the present invention, the source of the first transistor Q1 is connected to the source of the second transistor Q2, so that the anode of the body diode of the first transistor Q1 is connected to the anode of the body diode of the first transistor Q2, thereby realizing the reverse series connection of the first transistor Q1 and the first transistor Q2. In other embodiments, the drain of the first transistor Q1 and the drain of the second transistor Q2 may be connected in series, so that the cathode of the body diode of the first transistor Q1 is connected to the cathode of the body diode of the first transistor Q2, thereby realizing the reverse series connection of the first transistor Q1 and the first transistor Q2.

[0093] In a specific embodiment of the present invention, it may also include:

[0094] The seventh switch S7 is arranged between the live wire output terminal and the surge protection circuit:

[0095] An eighth switch S8 is provided between a connection terminal of the second switch S2 and the fourth switch S4 and a neutral line output terminal;

[0096] When the detection control unit 20 is not powered, the seventh switch S7 and the eighth switch S8 are both in a normally open state;

[0097] The detection control unit 20 is also used for:

[0098] When the load device is powered on and started, after the detection control unit 20 itself is powered, the seventh switch S7 and the eighth switch S8 are controlled to be turned on;

[0099] When it is detected that the power supply state of a single power supply line among the first power supply line and the second power supply line is abnormal, the seventh switch S7 and the eighth switch S8 are controlled to be turned off, and after the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 complete the state switching, the seventh switch S7 and the eighth switch S8 are controlled to be turned on.

[0100] In this embodiment, the seventh switch S7 and the eighth switch S8 are provided, which play the role of the master control switch of the power distribution device. It can be seen from the circuit structure that when the seventh switch S7 and the eighth switch S8 are turned off, the power distribution device cannot supply power to the load device. Only when the seventh switch S7 and the eighth switch S8 are both turned on, the power distribution device is allowed to supply power to the load device.

[0101] When the power distribution device is not powered, that is, when the detection control unit 20 is not powered, the seventh switch S7 and the eighth switch S8 are both in a normally open state. When the load device is powered on and the detection control unit 20 itself is powered, the seventh switch S7 and the eighth switch S8 can be controlled to be turned on, and then the startup process of the surge protection circuit is entered.

[0102] In addition, when switching the power supply line used by the power supply switching unit 10, since the seventh switch S7 and the eighth switch S8 are provided in this embodiment, the detection control unit 20 will first control the seventh switch S7 and the eighth switch S8 to be turned off, and then the on-off state of the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 can be switched, and when the switching is completed, the seventh switch S7 and the eighth switch S8 can be closed, and then the startup process of the surge protection circuit can be entered.

[0103] There can be many specific implementation methods of the temporary power supply unit 30. For example, the temporary power supply unit 30 of the present application solution can be implemented by a battery and a corresponding switch. When the temporary power supply unit 30 is not needed to power the load device, the detection control unit 20 will control the relevant switches in the temporary power supply unit 30 to turn off. Correspondingly, when the temporary power supply unit 30 is needed to power the load device, the detection control unit 20 can control the relevant switches in the temporary power supply unit 30 to turn on, so that the temporary power supply unit 30 can power the load device. In addition, in actual applications, the power output end of the temporary power supply unit 30 can include an anti-backflow design, which can be a passive anti-backflow design such as a diode, or an active anti-backflow design, that is, when the temporary power supply unit 30 detects that the output bus voltage is higher than the output voltage of the temporary power supply unit 30, the temporary power supply unit 30 can automatically shut down its own output. The output bus voltage described here is also the voltage of the power supply end of the load device.

[0104] In addition, it can be understood that since the temporary power supply unit 30 needs to be used to power the load device in the present application solution, that is, the electric energy stored in the temporary power supply unit 30 needs to be consumed, therefore, when the temporary power supply unit 30 is not needed to power the load device and the electric energy stored in the temporary power supply unit 30 is insufficient, the temporary power supply unit 30 should be charged in time. There are many specific implementation methods, for example, the temporary power supply unit 30 can be charged by the uninterruptible power supply of the server, or the temporary power supply unit 30 can be charged by the mains, so as to achieve the above-mentioned. Figure 4 For example, the charging port of the temporary power supply unit 30 can be connected to Figure 4 Between the relay A and the seventh switch S7 and the eighth switch S8, so that the temporary power supply unit 30 is charged by the commercial power.

[0105] In a specific embodiment of the present invention, please refer to Figure 5 , and may also include:

[0106] An auxiliary power supply unit 40 connected to the power supply switching unit 10, the detection control unit 20 and the temporary power supply unit 30, for supplying power to the power supply switching unit 10, the detection control unit 20 and the temporary power supply unit 30;

[0107] The auxiliary power supply unit 40 is connected to the first power supply line and the second power supply line respectively to obtain power through the first power supply line and / or the second power supply line.

[0108] In this embodiment, an auxiliary power supply unit 40 is provided, which is responsible for supplying low-voltage power to the power switching unit 10, the detection control unit 20 and the temporary power supply unit 30. That is, all components in the power distribution device that require power to work can be powered by the auxiliary power supply unit 40. The low-voltage power supply of the communication unit 50 in the following embodiments can also be provided by the auxiliary power supply unit 40. Figure 5 In the figure, the auxiliary power supply unit 40 is not directly connected to the temporary power supply unit 30 and the communication unit 50, which means that the relevant power supply lines can be connected to the temporary power supply unit 30 and the communication unit 50 via the detection control unit 20 to realize low-voltage power supply of the temporary power supply unit 30 and the communication unit 50.

[0109] In this embodiment, the auxiliary power supply unit 40 is connected to the first power supply line and the second power supply line respectively, and can obtain power through the first power supply line and / or the second power supply line. That is to say, even if a single power supply line is abnormal, it will not affect the power supply of the auxiliary power supply unit 40, thereby ensuring the stability of the power supply of the auxiliary power supply unit 40.

[0110] In a specific embodiment of the present invention, a communication unit 50 connected to the detection control unit 20 may also be included;

[0111] The detection control unit 20 is also used for:

[0112] When the switching instruction is not received through the communication unit 50, when the power supply states of the first power supply line and the second power supply line are both normal, the power supply switching unit 10 is controlled according to the data in the first storage medium to select the power supply line used by the power supply switching unit 10;

[0113] When a switching instruction is received through the communication unit 50 , when the power supply states of the first power supply line and the second power supply line are both normal, the power supply switching unit 10 is controlled according to the switching instruction to select the power supply line used by the power supply switching unit 10 .

[0114] It is understandable that, when one of the first power supply line and the second power supply line is normal and the other is abnormal, the detection control unit 20 naturally needs to control the power supply switching unit 10 to use the power supply line with normal power supply status. However, when the power supply status of the first power supply line and the second power supply line are both normal, any one of them can be selected. For example, a simple design method is to use the first power supply line by default to power the load device in this case.

[0115] This embodiment takes into account that, in order to ensure flexibility, the power supply line used by default can be determined by the data in the first storage medium, that is, when the switching instruction is not received through the communication unit 50, and the power supply status of the first power supply line and the second power supply line are normal, the power supply switching unit 10 is controlled according to the data in the first storage medium to select the power supply line used by the power supply switching unit 10.

[0116] For example, in some cases, the electric energy of the first power supply line comes from power plant A, which is relatively stable. Then, the information related to the first power supply line, such as the corresponding serial number value, can be written into the first storage medium in advance, so that after the detection control unit 20 reads the data in the first storage medium, it will control the power supply switching unit 10 according to the data in the first storage medium. In this example, the power supply line used by the power supply switching unit 10 is controlled to be the first power supply line. Later, for example, it is found that the electric energy of the first power supply line from power plant A has become unstable, and the electric energy of the second power supply line from power plant B is relatively more stable. Then, the data in the first storage medium can be modified, so that when the power supply switching unit 10 is controlled according to the modified data in the first storage medium, the power supply line used by the power supply switching unit 10 is controlled to be the second power supply line.

[0117] And this implementation further takes into account that it can also support the staff to modify the power supply line used by the power supply switching unit 10 at any time through the switching instruction, further improving the flexibility. And this implementation takes into account that the requirements of the switching instruction may conflict with the data in the first storage medium. Therefore, when the switching instruction is received through the communication unit 50, if the power supply status of the first power supply line and the second power supply line are both normal, the data in the first storage medium will be ignored, and the power supply switching unit 10 will be directly controlled according to the switching instruction. In other words, the priority of the switching instruction is higher than the priority of the data in the first storage medium, which ensures that the staff can flexibly select the power supply line used by the power supply switching unit 10 based on the switching instruction, and it is not easy to make mistakes.

[0118] By applying the technical solution provided in the embodiment of the present invention, it is not necessary to set up two power distribution devices as in the traditional solution, but a redundant power supply design of A-way + B-way can be realized through a single power distribution device. Specifically, the power distribution device includes: a power supply switching unit 10, a detection control unit 20 and a temporary power supply unit 30. The first power supply port and the second power supply port of the power supply switching unit 10 are respectively connected to the first power supply line and the second power supply line, and the output port is used as the power supply port of K parallel power modules in the load device, so that the first power supply line or the second power supply line can supply power to the load device through the power supply switching unit. The detection control unit 20 can detect the power supply status of the first power supply line and the second power supply line. If the power supply status of one of the two power supply lines is abnormal, the detection control unit 20 will control the power supply switching unit 10 to use the power supply line with normal power supply status to power the load device, thereby realizing redundant power supply of A-way + B-way of the load device. It can be seen that, since at the same time, only the electric energy from a single power supply line needs to be provided to the load device through the power supply switching unit 10, only K parallel power modules need to be set in the load device, K ≥ N, N is the minimum number of power modules required by the load device, that is, K is required to be equal to 2N, which reduces the cost and spatial layout difficulty of the present application. In addition, since the K parallel power modules in the load device are all connected to the output port of the power supply switching unit 10, the present application reduces the accuracy requirements for wiring, and wiring errors are not prone to occur.

[0119] Furthermore, considering that in the present application, at the same time, the electric energy from a single power supply line is provided to the load device through the power supply switching unit 10, the power supply switching unit 10 must be able to switch the power supply line under the control of the detection control unit 20. Since the switching process is time-consuming, in order to ensure power supply during the switching process, a temporary power supply unit 30 is provided in the power distribution device of the present application. The temporary power supply unit 30 can supply power to the load device under the control of the detection control unit 20 during the process of the power supply switching unit 10 switching the power supply line used, thereby ensuring the power supply reliability of the load device during the switching process.

[0120] In summary, the present application scheme can effectively ensure power supply reliability, while also reducing wiring accuracy requirements, and reducing costs and spatial layout difficulty.

[0121] Corresponding to the above power distribution device embodiment, the embodiment of the present invention further provides a power supply device, which can be referred to in correspondence with the above text. The power supply device can include the power distribution device in any of the above embodiments.

[0122] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0123] Professionals may further realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention, and the description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present invention. It should be pointed out that for ordinary technicians in the technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A power distribution device, characterized in that: include: Power supply switching unit, detection control unit and temporary power supply unit; The first power supply port and the second power supply port of the power supply switching unit are connected to the first power supply line and the second power supply line respectively, and the output port serves as the power supply port of K parallel power modules in the load device, so that the first power supply line or the second power supply line supplies power to the load device through the power supply switching unit; wherein K is a positive integer and K≥N, and N is the minimum number of power modules required by the load device; The detection control unit is connected to the power supply switching unit, and is used to control the power supply switching unit to use the power supply line with normal power supply state to supply power to the load device when it is detected that the power supply state of a single power supply line among the first power supply line and the second power supply line is abnormal; The temporary power supply unit is connected to the detection control unit, and is used to supply power to the load device under the control of the detection control unit when the power supply switching unit switches the power supply line used.

2. The power distribution device according to claim 1, characterized in that: The power supply switching unit includes a first switch, a second switch, a third switch and a fourth switch; the first power supply port includes a first live wire terminal and a first neutral wire terminal, the second power supply port includes a second live wire terminal and a second neutral wire terminal, and the output port includes a live wire output terminal and a neutral wire output terminal; The first end of the first switch serves as the first live wire terminal of the power supply switching unit, the first end of the second switch serves as the first neutral wire terminal of the power supply switching unit, the first end of the third switch serves as the second live wire terminal of the power supply switching unit, and the first end of the fourth switch serves as the second neutral wire terminal of the power supply switching unit; The second end of the first switch is connected to the second end of the third switch, and the connecting end is connected to the live line output end; the second end of the third switch is connected to the second end of the fourth switch, and the connecting end is connected to the neutral line output end.

3. The power distribution device according to claim 2, characterized in that: The on-off state of the first switch is interlocked with the on-off state of the third switch, and the on-off state of the second switch is interlocked with the on-off state of the fourth switch; The on-off state of the first switch is always consistent with the on-off state of the second switch, and the on-off state of the third switch is always consistent with the on-off state of the fourth switch.

4. The power distribution device according to claim 2, characterized in that: Also includes: A surge protection circuit is arranged between the connection end of the first switch and the third switch and the live wire output end and connected to the detection control unit, and is used to suppress surge current when the load device is powered on and started, and when the power supply switching unit switches the power supply line used.

5. The power distribution device according to claim 4, characterized in that: The surge protection circuit comprises: a fifth switch, a sixth switch, a first resistor and a second resistor; the resistance value of the second resistor is positively correlated with its own temperature; The first end of the fifth switch is respectively connected to the first end of the second resistor, the first end of the sixth switch, and the connection end of the first switch and the third switch; the second end of the fifth switch is connected to the first end of the first resistor; The second end of the first resistor is connected to the second end of the second resistor and the second end of the sixth switch respectively, and the connecting end is connected to the live wire output end; Wherein, when the detection control unit is not powered, the fifth switch and the sixth switch are both in a normally open state; The detection control unit is also used for: When the load device is powered on and started, the detection control unit controls the fifth switch to be turned on after the detection control unit itself is powered on for a first time period, and controls the fifth switch to be turned off and the sixth switch to be turned on after the fifth switch is turned on for a second time period; When it is detected that the power supply state of a single power supply line among the first power supply line and the second power supply line is abnormal, the sixth switch is controlled to be turned off, and after the first switch, the second switch, the third switch and the fourth switch complete the state switching for a first time period, the fifth switch is controlled to be turned on, and after the fifth switch is turned on for a second time period, the fifth switch is controlled to be turned off and the sixth switch is controlled to be turned on.

6. The power distribution device according to claim 5, characterized in that: The fifth switch includes a first transistor and a second transistor connected in reverse series, and the sixth switch is a controlled switch of a relay.

7. The power distribution device according to claim 4, characterized in that: Also includes: A seventh switch provided between the live wire output terminal and the surge protection circuit: an eighth switch provided between a connection terminal of the second switch and the fourth switch and the neutral line output terminal; Wherein, when the detection control unit is not powered, the seventh switch and the eighth switch are both in a normally open state; The detection control unit is also used for: When the load device is powered on and started, the detection control unit controls the seventh switch and the eighth switch to be turned on after it is powered on; When it is detected that the power supply state of a single power supply line among the first power supply line and the second power supply line is abnormal, the seventh switch and the eighth switch are controlled to be turned off, and after the first switch, the second switch, the third switch and the fourth switch complete the state switching, the seventh switch and the eighth switch are controlled to be turned on.

8. The power distribution device according to claim 1, characterized in that: Also includes: An auxiliary power supply unit connected to the power supply switching unit, the detection control unit and the temporary power supply unit, and used to supply power to the power supply switching unit, the detection control unit and the temporary power supply unit; The auxiliary power supply unit is connected to the first power supply line and the second power supply line respectively to obtain power through the first power supply line and / or the second power supply line.

9. The power distribution device according to any one of claims 1 to 8, characterized in that: Also includes a communication unit connected to the detection control unit; The detection control unit is also used for: When no switching instruction is received through the communication unit, and when the power supply states of the first power supply line and the second power supply line are both normal, controlling the power supply switching unit according to the data in the first storage medium to select the power supply line used by the power supply switching unit; When a switching instruction is received through the communication unit, when the power supply states of the first power supply line and the second power supply line are both normal, the power supply switching unit is controlled according to the switching instruction to select the power supply line used by the power supply switching unit.

10. A power supply device, characterized in that: It comprises a power distribution device as claimed in any one of claims 1 to 9.

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