Power supply, control method and power supply device

Abstract

The application discloses a power supply, a control method and a power supply device, and relates to the technical field of power supply. The power supply comprises a power conversion circuit, an energy storage device and a control circuit. The power conversion circuit is used for converting alternating current into direct current and providing the direct current to a load through an output end of the power supply. The energy storage device and the power conversion circuit are connected in parallel between the positive and negative poles of the output end of the power supply. The control circuit is used for controlling the power conversion circuit to stop working and controlling the energy storage device to provide electric energy to the load to supply power to the load through the energy storage device when the required power of the load is less than or equal to a first threshold power of the load. As a result, the overall loss of the power supply can be reduced, the conversion efficiency of the power supply is improved, and the power supply is in a high-efficiency working state without power failure of the load.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a power supply, control method and power supply equipment. Background Technology

[0002] Currently, power supplies are generally used to power loads. When operating, a power supply converts the received voltage into the voltage required by the load to provide power. However, the power consumption of a load is usually dynamic, and power supplies also have fixed losses, including losses in control circuits and auxiliary power supply circuits (such as circuits supplying power to the control circuit). When the load power consumption is low, the fixed losses of the power supply are not reduced compared to when the load power consumption is high. This results in lower conversion efficiency of the power supply when used in scenarios with low load power consumption, preventing the power supply from consistently operating at high efficiency. Summary of the Invention

[0003] This application provides a power supply, a control method, and a power supply device to improve the conversion efficiency of the power supply and enable the power supply to operate in a high-efficiency state.

[0004] Firstly, this application provides a power supply comprising: a power conversion circuit, an energy storage device, and a control circuit. The power conversion circuit converts alternating current (AC) into direct current (DC) and provides the DC power to a load through the power supply's output terminal. The energy storage device is connected in parallel with the power conversion circuit between the positive and negative terminals of the power supply's output terminal. Furthermore, the control circuit controls the power conversion circuit to stop operating when the load's power demand is less than or equal to a first threshold power of the load. The energy storage device provides electrical energy to the load after the power conversion circuit stops operating. Thus, by supplying power to the load through the energy storage device, the overall power supply loss can be reduced and the power supply conversion efficiency improved, allowing the power supply to operate in a highly efficient state while avoiding power outages.

[0005] Furthermore, because the energy storage device supplies power to the load after the power conversion circuit stops working, the voltage at the power supply's output terminal drops, causing it to fall below the minimum value of the power supply's rated voltage regulation range. Specifically, "the voltage at the power supply's output terminal is below the minimum value of the power supply's rated voltage regulation range" means that when the power conversion circuit stops working, the energy storage device supplies power to the load, the power supply's output voltage decreases, and during this voltage drop, there is a point where the output voltage falls below the minimum value of the power supply's rated voltage regulation range.

[0006] In one possible implementation, if the power conversion circuit stops operating, the electrical energy in the energy storage device will gradually decrease over time. If the power conversion circuit remains inactive, it may cause a power outage. Therefore, the control circuit is also used to: control the power conversion circuit to operate when the voltage at the power supply output drops to a first voltage. Furthermore, the power conversion circuit is used to charge the energy storage device. Thus, when the power conversion circuit is operating, it can perform voltage conversion and output power. A portion of the output power is provided to the load to supply power and ensure the load's power requirements, while the other portion of the output power is provided to the energy storage device to charge it.

[0007] Furthermore, the power conversion circuit charges the energy storage device, causing the output voltage of the power supply to rise, and resulting in the output voltage exceeding the maximum value of the power supply's rated voltage regulation range. This means that, while the power conversion circuit is operating, the output voltage of the power supply exhibits an upward trend, and during this rise, there exists a point where the output voltage exceeds the maximum value of the power supply's rated voltage regulation range.

[0008] In addition, the first voltage is less than the minimum value of the regulated voltage range and greater than the minimum value of the allowable range of the load's supply voltage.

[0009] In one possible implementation, when the power conversion circuit is operating and the energy storage device is charging, if the voltage at the power supply's output terminal rises too high, it could exceed the maximum allowable range of the load's supply voltage, damaging the load. Therefore, the control circuit is also used to: when the voltage at the power supply's output terminal rises to a second voltage, control the power conversion circuit to stop operating. This not only temporarily halts the energy transfer process but also reduces the overall power supply loss, improves the power supply's conversion efficiency, and keeps the power supply in a highly efficient operating state.

[0010] The second voltage is greater than the maximum value of the regulated voltage range but less than the maximum value of the allowable range.

[0011] In one possible implementation, the load can have various device types and operating modes. For example, the load could be a communication device, thus the power supply described in this embodiment can be used to power the communication device. In other embodiments of this application, the load can also be a terminal device or other devices requiring power, including but not limited to mobile phones, laptops, and in-vehicle devices. Therefore, the operating state of the power conversion circuit can be controlled based on the device type and operating mode of the load, combined with its power demand, to improve the power conversion efficiency and ensure the power supply operates at high efficiency.

[0012] In one possible implementation, the communication device 200 has many device types, including but not limited to a building baseband unit (BBU) and a radio remote unit (RRU). The communication device also has many operating types, including but not limited to time division duplex (TDD) and non-TDD (e.g., but not limited to frequency division duplexing (FDD)).

[0013] In one possible implementation, the control circuit is further configured to: control the power conversion circuit to stop operating during a first time period, wherein the first time period corresponds to the uplink time slot period when the load's operating type is TDD. Therefore, the power consumption of the load operating during the uplink time slot is relatively low. Thus, controlling the power conversion circuit to stop operating when the load is operating during the uplink time slot can reduce the overall power supply loss, improve the power supply conversion efficiency, and enable the power supply to operate at high efficiency.

[0014] In one possible implementation, the control circuit is further configured to: control the power conversion circuit to operate during a second time period, the power conversion circuit being used to charge the energy storage device; wherein the second time period corresponds to the downlink time slot in TDD mode. Therefore, the power consumption of the load is relatively higher when operating in the downlink time slot. Thus, when the load is operating in the downlink time slot, the power conversion circuit can be controlled to operate, not only supplying power to the load but also charging the energy storage device, ensuring that the energy storage device has sufficient power to supply power to the load when it is operating in the uplink time slot.

[0015] Furthermore, the power conversion circuit charges the energy storage device, causing the output voltage of the power supply to rise, and resulting in the output voltage exceeding the maximum value of the power supply's rated voltage regulation range. This means that, while the power conversion circuit is operating, the output voltage of the power supply exhibits an upward trend, and during this rise, there exists a point where the output voltage exceeds the maximum value of the power supply's rated voltage regulation range.

[0016] In one possible implementation, the control circuit is further configured to: control the power conversion circuit to stop operating when the load's power demand during a second time period is less than or equal to a second threshold power; wherein the second time period corresponds to the downlink time slot in TDD mode, and the second threshold power is less than the first threshold power. This demonstrates that the load's power consumption during the downlink time slot is also very low, allowing the energy storage device to supply power for a considerable period, further improving the power conversion efficiency and enabling the power supply to operate at a high efficiency.

[0017] In one possible implementation, the control circuit is further configured to: control the power conversion circuit to stop operating during a first time period when the demanded power exceeds a first threshold power, and control the power conversion circuit to operate during a second time period; wherein the first time period corresponds to the uplink time slot period when the load's operating type is TDD, and the second time period corresponds to the downlink time slot period when the load's operating type is TDD. Thus, even when the load has a high power demand, the operating state of the power conversion circuit can be switched between operating and stopping, further improving the power supply's conversion efficiency and ensuring the power supply operates at a high efficiency.

[0018] In one possible implementation, the control circuit is further configured to: control the power conversion circuit to operate when the required power exceeds a first threshold power, so that the voltage at the output of the power supply is within a regulated range. This prevents excessive voltage fluctuations at the power supply's output from affecting the load when the load has a high power demand, thus ensuring the stability and performance of the load.

[0019] In one possible implementation, the power supply further includes a communication circuit for communicatively coupling with the load. Furthermore, the control circuit is used to acquire device information sent by the load via the communication circuit. This device information indicates the load's device type and operating type, allowing the control circuit to determine the load's required power based on the device type and operating type. This enables the control circuit to obtain the load's device type and operating type, and thus determine the load's required power.

[0020] In one possible implementation, the device type and operating type of the load can be stored in the power supply, and when the power supply is working, the control circuit can directly call the device type and operating type of the load.

[0021] In one possible implementation, the power supply further includes a current detection circuit coupled to the output terminal of the power supply. The current detection circuit detects the current at the output terminal of the power supply; wherein, if the current is less than or equal to a first threshold current, it can be determined that the required power is less than or equal to the first threshold power. This simplifies the determination of the relationship between the load's required power and the first threshold power, thereby reducing design complexity and production costs.

[0022] In one possible implementation, the power supply further includes a communication circuit for communicatively coupling with the load. The control circuit is also configured to receive power information from the load via the communication circuit, the power information indicating the required power. Thus, through communication between the power supply and the load, the control circuit can obtain the load's required power, and can then compare the required power with a first threshold power to control the operating state of the power conversion circuit.

[0023] For example, the communication circuit includes, but is not limited to, power line communication (PLC) circuits, thereby allowing direct reuse of power cables to achieve communication coupling between the communication device and the communication circuit. Alternatively, the communication circuit may also include wireless communication circuits, enabling wireless communication coupling between the communication circuit and the communication device.

[0024] In one possible implementation, the power supply further includes a voltage detection circuit coupled to the output terminal of the power supply. This voltage detection circuit is used to detect the voltage at the output terminal of the power supply. Therefore, detecting the voltage at the output terminal of the power supply is relatively simple to implement, thereby reducing design complexity and production costs.

[0025] Secondly, this application provides a power supply control method, which includes: when the power demand of the load is less than or equal to a first threshold power of the load, a control circuit in the power supply controls a power conversion circuit in the power supply to stop working, and an energy storage device in the power supply provides electrical energy to the load after the power conversion circuit stops working. Therefore, while avoiding power outages, the overall power supply loss can be reduced, the power supply conversion efficiency can be improved, and the power supply can operate in a highly efficient state.

[0026] In one possible implementation, the method further includes: when the voltage at the output terminal of the power supply drops to a first voltage, the control circuit controls the power conversion circuit to operate, the power conversion circuit charges the energy storage device, and the first voltage is less than the minimum value of the voltage regulation range and greater than the minimum value of the allowable range of the supply voltage of the load.

[0027] In one possible implementation, the method further includes: when the voltage at the output terminal of the power supply rises to a second voltage, the control circuit controls the power conversion circuit to stop working; wherein the second voltage is greater than the maximum value of the regulated range and less than the maximum value of the allowable range.

[0028] In one possible implementation, the method includes: controlling the power conversion circuit to stop operating during a first time period, wherein the first time period corresponds to the time period of the uplink time slot when the load's operating type is TDD.

[0029] In one possible implementation, the method further includes: controlling a power conversion circuit to operate during a second time period, the power conversion circuit charging an energy storage device, the second time period corresponding to the downlink time slot in the case of TDD.

[0030] In one possible implementation, the method further includes: when the demand power is greater than a first threshold power, controlling the power conversion circuit to stop working during a first time period, and controlling the power conversion circuit to work during a second time period; wherein the first time period corresponds to the uplink time slot time period when the load's working type is Time Division Duplex (TDD), and the second time period corresponds to the downlink time slot time period when the load is in TDD mode.

[0031] Thirdly, this application provides a power supply device, which includes a housing and a power source. The housing has a first interface and a second interface mounted on it. The input terminal of the power source is coupled to the first interface, and the output terminal of the power source is coupled to the second interface.

[0032] Furthermore, the technical effects of the corresponding solutions in the second and third aspects can be referred to the technical effects that can be obtained by the corresponding solutions in the first aspect or any embodiment of the first aspect, and the repeated parts will not be described in detail. Attached Figure Description

[0033] Figure 1 A schematic diagram illustrating an application scenario of the power supply equipment provided in the embodiments of this application;

[0034] Figure 2 A schematic diagram of the power supply and load provided in an embodiment of this application;

[0035] Figure 3a This is a schematic diagram of the voltage waveform at the output terminal of the power supply in an embodiment of this application;

[0036] Figure 3b This is a schematic diagram of the signal output from the control circuit to the power conversion circuit in an embodiment of this application;

[0037] Figure 4 A schematic diagram of yet another structure of the power supply and load provided in an embodiment of this application;

[0038] Figure 5a This is a schematic diagram of the power supply and communication equipment in an embodiment of this application;

[0039] Figure 5b This is another structural schematic diagram of the power supply and communication device in the embodiments of this application;

[0040] Figure 5c This is another structural schematic diagram of the power supply and communication device in the embodiments of this application;

[0041] Figure 6 This is a schematic diagram of a power waveform in an embodiment of this application;

[0042] Figure 7 This is a schematic diagram of the power waveform when the load in the embodiment of this application is operating under TDD conditions;

[0043] Figure 8 This is another power waveform diagram in the embodiments of this application.

[0044] Figure label:

[0045] 10-Power supply equipment; 11-Housing; 12-First interface; 13-Second interface; 20-Load; 100-Power supply; 110-Power conversion circuit; 120-Control circuit; 130-Communication circuit; 140-Current detection circuit; 150-Voltage detection circuit; 160-Energy storage device; 200-Communication equipment; 210-RRU; 220-BBU; Co-Capacitor; Vin-Input terminal; Vout-Output terminal; t1-Downlink time slot; t2-Uplink time slot; Fs1-First time period; Fs2-Second time period. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The specific operating methods in the method embodiments can also be applied to the device embodiments or system embodiments. It should be noted that in the description of this application, "multiple" can be understood as "at least two". Furthermore, it should be understood that in the description of this application, terms such as "first" and "second" are used only for distinguishing purposes and should not be construed as indicating or implying relative importance, nor as indicating or implying order. Moreover, the coupling in this application can be an electrical connection, that is, two components can be directly connected or indirectly connected through other components; or, the coupling can also refer to a coupling connection.

[0047] It should be noted that the same reference numerals in the accompanying drawings of this application denote the same or similar structures, and therefore repeated descriptions of them will be omitted. Terms expressing position and direction described in this application are illustrative based on the accompanying drawings, but may be modified as needed, and all modifications are included within the scope of protection of this application. The accompanying drawings of this application are for illustrating relative positional relationships only and do not represent actual scale.

[0048] To facilitate understanding of the power supply, control method, and power supply equipment provided in the embodiments of this application, their application scenarios are first introduced below. The power supply provided in the embodiments of this application can be applied to any power supply scenario involving voltage conversion. For example, the power supply provided in the embodiments of this application can be applied to power supply equipment supplying power to a load. The power supply, control method, and power supply equipment provided in the embodiments of this application will be illustrated below with reference to the accompanying drawings.

[0049] Figure 1 This is a schematic diagram illustrating an application scenario of the power supply equipment provided in the embodiments of this application, with reference to... Figure 1 In one embodiment of this application, the power supply device 10 may include a housing 11, on which a first interface 12 and a second interface 13 are mounted. The first interface 12 is used to receive alternating current (AC), and the second interface 13 is used to output direct current (DC). For example, the first interface 12 is used to couple to mains power, and the second interface 13 is used to couple to a load 20. The power supply device 10 can perform a step-up or step-down conversion on the AC mains power, and then output DC power suitable for the load 20 through the second interface 13 to power the load 20.

[0050] For example, refer to Figure 1 The power supply device 10 may include a power supply 100. The housing 11 has an accommodating space, in which the power supply 100 can be disposed and fixed to the housing 11. Furthermore, the input terminal Vin of the power supply 100 is coupled to a first interface 12, allowing the input terminal Vin to receive AC power. The output terminal Vout of the power supply 100 is coupled to a second interface 13, allowing the output terminal Vout to be used to couple to a load 20. Thus, the power supply 100 can boost or buck the AC power to DC power suitable for the load 20 before outputting it to the load 20 to supply power.

[0051] Figure 2 A schematic diagram of a power supply and load provided in an embodiment of this application is shown below. Figure 2The power supply 100 provided in this application embodiment may include: a power conversion circuit 110, an energy storage device 160, and a control circuit 120. The input terminal of the power conversion circuit 110 is coupled to the input terminal Vin of the power supply 100, and the output terminal of the power conversion circuit 110 is coupled to the output terminal Vout of the power supply 100. The energy storage device 160 is connected in parallel with the output terminal Vout of the power supply 100. The control circuit 120 is coupled to the power conversion circuit 110. Therefore, the power conversion circuit 110 can be controlled by the control circuit 120, enabling it to convert the alternating current received through the input terminal Vin of the power supply 100 into direct current, and to supply the direct current to the load 20 through the output terminal Vout of the power supply 100, thereby powering the load 20. It is understood that in the accompanying drawings of this application embodiment, "+" represents the positive terminal of the input terminal Vin and the positive terminal of the output terminal Vout, respectively, and "-" represents the negative terminal of the input terminal Vin and the negative terminal of the output terminal Vout, respectively. In other words, the energy storage device 160 and the power conversion circuit 110 are connected in parallel between the positive and negative terminals of the output terminal Vout of the power supply 100.

[0052] As an example, the output terminal Vout of power supply 100 can be coupled to load 20 via a power cable, through which the DC power output of power conversion circuit 110 is transmitted to load 20.

[0053] In one embodiment of this application, the power conversion circuit 110 can be a single-stage power supply topology or a two-stage power supply topology. Exemplarily, a single-stage power supply topology can be an alternating current (AC) to direct current (DC) converter circuit. A two-stage power supply topology can include an AC-DC converter circuit and a DC-DC converter circuit, with the input terminal of the AC-DC converter circuit coupled to the input terminal of the power supply, the output terminal of the AC-DC converter circuit coupled to the input terminal of the DC-DC converter circuit, and the output terminal of the DC-DC converter circuit coupled to the output terminal of the power supply. Alternatively, a two-stage power supply topology can also include an AC-AC converter circuit and an AC-DC converter circuit, with the input terminal of the AC-AC converter circuit coupled to the input terminal of the power supply, the output terminal of the AC-AC converter circuit coupled to the input terminal of the AC-DC converter circuit, and the output terminal of the AC-DC converter circuit coupled to the output terminal of the power supply.

[0054] In one embodiment of this application, the control circuit 120 includes, but is not limited to, a field-programmable gate array (FPGA), a general-purpose central processing unit (CPU), a general-purpose processor, a digital signal processing unit (DSP), an application-specific integrated circuit (ASIC), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The aforementioned control circuit 120 can also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0055] Understandably, the control circuit 120 controls the power conversion circuit 110 to operate, so that the voltage of the DC power converted by the power conversion circuit 110 is usually the rated voltage Vor of the power supply 100, that is, the voltage output at the output terminal Vout of the power supply 100 is usually the rated voltage Vor of the power supply. However, due to some limitations, the voltage at the output terminal Vout of the power supply 100 cannot be fixed at the rated voltage Vor, but will have some error.

[0056] Reference Figure 3a , Figure 3a The waveform of the output voltage Uo1 of the power supply in the relevant technology is illustrated. Currently, by controlling the power conversion circuit 110, the voltage Uo1 of the output Vout of the power supply 100 is kept within the voltage regulation range of the rated voltage Vor of the power supply 100 [Vor-ΔV1, Vor+ΔV1], which can be regarded as the voltage Uo1 of the output Vout of the power supply 100 being the rated voltage Vor. Furthermore, to ensure the normal operation of the load 20, the voltage regulation range of the rated voltage Vor of the power supply 100 [Vor-ΔV1, Vor+ΔV1] is usually within the allowable range of the required supply voltage Vir of the load 20 [Vir-ΔV2, Vir+ΔV2]. Here, ΔV1 is the voltage margin, usually a relatively small value, for example, ΔV1 can be a few tenths of a volt. And Vir-ΔV2 is the minimum voltage at which the load 20 can operate normally; below this voltage, the load 20 may fail to start or malfunction. Vir+ΔV2 is the highest voltage at which load 20 can operate normally. Exceeding this voltage may damage load 20 or degrade its performance. Furthermore, ΔV2 is a voltage margin, for example, ΔV2 can be 5% Vir to 10% Vir. In some embodiments, the specific values ​​of ΔV1 and ΔV2 can be flexibly designed according to the needs of the actual application scenario, and are not limited here.

[0057] In some embodiments, to ensure that the voltage at the output terminal Vout of the power supply 100 is within the regulated range of the rated voltage Vor [Vor-ΔV1, Vor+ΔV1], the control circuit typically keeps the power conversion circuit continuously operating. However, in practical applications, the power consumption of the load 20 is usually dynamic. Furthermore, due to the fixed losses in the power supply 100, when the power consumption of the load 20 is high, the fixed losses of the power supply 100 are lower than when the power consumption of the load 20 is high, resulting in higher conversion efficiency for the power supply 100. When the power consumption of the load 20 is low, the fixed losses of the power supply 100 are not reduced compared to when the power consumption of the load 20 is high. This results in lower conversion efficiency for the power supply 100 when used in scenarios where the power consumption of the load 20 is low, preventing the power supply 100 from consistently operating at high efficiency.

[0058] To address the aforementioned issues, in this embodiment, the power demand of load 20 is compared with a first threshold power of load 20. If the power demand is less than or equal to the first threshold power, it indicates that load 20 has lower power consumption and lower energy demand. Therefore, control circuit 120 can control power conversion circuit 110 to stop operating when the power demand of load 20 is less than or equal to the first threshold power, temporarily halting the energy transfer process and reducing losses in power conversion circuit 110. Furthermore, when power conversion circuit 110 stops operating, energy storage device 160 provides power to load 20, preventing power outages. Thus, while preventing power outages in load 20, the overall losses of power supply 100 are reduced, thereby improving the conversion efficiency of power supply 100 and enabling it to operate at high efficiency.

[0059] Furthermore, referring to Figure 3a , Figure 3a The waveform of the voltage Uo2 at the output terminal of the power supply in this embodiment is also illustrated. When the power conversion circuit 110 stops working, the voltage Uo2 at the output terminal Vout of the power supply 100 decreases, causing the voltage Uo2 at the output terminal Vout of the power supply 100 to be less than the minimum value Vor-ΔV1 of the voltage regulation range [Vor-ΔV1, Vor+ΔV1] of the rated voltage Vor of the power supply 100. That is, when the power conversion circuit 110 stops working, the voltage Uo2 shows a decreasing trend, and during the process of the voltage Uo2 decreasing, there is a situation where the voltage Uo2 is less than Vor-ΔV1.

[0060] Understandably, the load's power requirement refers to the actual electrical power the load draws from the power source to maintain normal operation; it is the electrical energy input required for the load to perform its function, and can be measured in watts. For example, a load with high power consumption has a correspondingly higher power requirement, and a load with low power consumption has a correspondingly lower power requirement. Furthermore, the first threshold power can be a power threshold value. When the load's power requirement is less than or equal to this value, the control circuit can control the power conversion circuit to stop working and provide electrical energy to the load through the energy storage device. Moreover, the first threshold power can be adjusted according to the load's equipment type and operating mode; therefore, the first threshold power can be flexibly designed according to the actual application scenario and is not limited here.

[0061] Understandably, Figure 3a The waveforms of voltages Uo1 and Uo2 at the output terminal Vout of power supply 100 shown in the diagram are intended to illustrate their rising and falling trends, and do not concern the specific speed (e.g., slope) of voltages Uo1 and Uo2 during the rising and falling process. The waveforms of voltage Uo2 at the output terminal of the power supply shown in the related figures below are similar, and repeated details will not be elaborated.

[0062] The following examples illustrate the operating state of the power conversion circuit in the embodiments of this application.

[0063] In one embodiment of this application, when the power demand of load 20 is less than or equal to a first threshold power and the power conversion circuit 110 stops working, combined with Figure 3aAs shown in the figure, the voltage Uo2 at the output terminal Vout of the power supply 100 will drop, and the energy storage device 160 continuously supplies electric energy to the load 20 to keep the load 20 working normally. However, as time goes by, the electric energy in the energy storage device 160 will gradually decrease. If the power conversion circuit 110 keeps stopping working, a power outage may occur. Based on this, the control circuit 120 is further configured to: control the power conversion circuit 110 to operate when the voltage Uo2 at the output terminal Vout of the power supply 100 drops to a first voltage Uos1. When the power conversion circuit 110 operates, the power conversion circuit 110 can perform voltage conversion and output power. A part of the output power is supplied to the load 20 to meet the power requirement of the load 20, and the other part of the output power is supplied to the energy storage device 160 to charge the energy storage device 160. Moreover, when the power conversion circuit 110 operates, the voltage Uo2 at the output terminal Vout of the power supply 100 rises, so that the voltage Uo2 at the output terminal Vout of the power supply 100 is greater than the maximum value Vor+ΔV1 of the voltage stabilization range [Vor-ΔV1, Vor+ΔV1] of the rated voltage Vor of the power supply 100. That is, when the power conversion circuit 110 operates, the voltage Uo2 shows an upward trend, and during the rising process of the voltage Uo2, there exists a situation where the voltage Uo2 is greater than Vor+ΔV1.

[0064] And, with reference to Figure 3a , the first voltage Uos1 is less than the minimum value Vor-ΔV1 of the voltage stabilization range [Vor-ΔV1, Vor+ΔV1] and greater than the minimum value Vir-ΔV2 of the allowable range [Vir-ΔV2, Vir+ΔV2] of the supply voltage Vir of the load 20, that is Vir-ΔV2<Uos1<Vor-ΔV1. Thus, the power conversion circuit 110 can be controlled to restart working based on the change of the voltage Uo2, preventing the load 20 from power outage. For example, the absolute value |ΔVos1| of the difference ΔVos1 between the first voltage Uos1 and Vor-ΔV1 is greater than zero, and the absolute value |ΔVos2| of the difference ΔVos2 between the first voltage Uos1 and Vir-ΔV2 is greater than zero. As an example, |ΔVos2|≤|ΔVos1|, so that the first voltage Uos1 can be close to Vir-ΔV2. Further, |ΔVos2| can also be several tenths of a volt, so that the first voltage Uos1 can be as close to Vir-ΔV2 as possible. In some embodiments, the specific value of the first voltage Uos1 can be flexibly designed according to the requirements of actual application scenarios, which is not limited herein.

[0065] In one embodiment of the present application, in combination with Figure 3aAs shown, when the required power of the load 20 is less than or equal to the first threshold power of the load and the power conversion circuit 110 is in operation, the energy storage device 160 is charged, and the voltage Uo2 at the output terminal Vout of the power supply 100 starts to rise from the first voltage Uos1. If the voltage Uo2 at the output terminal Vout of the power supply 100 rises to a relatively high level, it will exceed the maximum value Vir+ΔV2 of the allowable range [Vir-ΔV2, Vir+ΔV2] of the supply voltage Vir of the load 20, thus damaging the load 20. Therefore, the control circuit 120 is further configured to: when the power conversion circuit 110 is in operation and the voltage Uo2 at the output terminal Vout of the power supply 100 rises to the second voltage Uos2, control the power conversion circuit 110 to stop operating. This can not only temporarily stop the energy transfer process of the power conversion circuit 110, but also reduce the overall loss of the power supply 100, improve the conversion efficiency of the power supply 100, and keep the power supply 100 in a high-efficiency operating state. Wherein, when the power conversion circuit 110 stops operating, electric energy is supplied to the load 20 through the energy storage device 160. Therefore, the overall loss of the power supply 100 can be reduced, the conversion efficiency of the power supply 100 can be improved, and the power supply 100 can be maintained in a high-efficiency operating state while avoiding power outage of the load 20. Thereafter, when the power conversion circuit 110 stops operating, the voltage Uo2 at the output terminal Vout of the power supply 100 starts to drop from the second voltage Uos2. Therefore, when the required power of the load 20 is less than or equal to the first threshold power of the load, the operation mode in which the power conversion circuit 110 alternates between operating and stopping can be controlled based on the magnitude of the voltage Uo2 at the output terminal Vout of the power supply 100.

[0066] Furthermore, with reference to Figure 3a , the second voltage Uos2 is greater than the maximum value Vor+ΔV1 of the voltage stabilization range [Vor-ΔV1, Vor+ΔV1] and less than the maximum value Vir+ΔV2 of the allowable range [Vir-ΔV2, Vir+ΔV2] of the supply voltage Vir of the load 20, that is, Vor+ΔV1<Uos2<Vir+ΔV2. Therefore, the power conversion circuit 110 can be controlled to stop operating again based on the change of the voltage Uo2, so as to avoid damaging the load 20. Illustratively, the absolute value |ΔVos3| of the difference ΔVos3 between the second voltage Uos2 and Vor+ΔV1 is greater than zero, and the absolute value |ΔVos4| of the difference ΔVos4 between the second voltage Uos2 and Vir+ΔV2 is greater than zero. As an example, |ΔVos4|≤|ΔVos3|, so that the second voltage Uos2 can be close to Vir+ΔV2. Further, |ΔVos4| can also be a few tenths of a volt, so that the second voltage Uos2 can be as close to Vir+ΔV2 as possible. In some embodiments, the specific value of the second voltage Uos2 can be flexibly designed according to the requirements of actual application scenarios, and is not limited herein.

[0067] Understandably, when the power demand of load 20 is low, its power consumption is low. Therefore, when the power conversion circuit 110 stops working, the voltage Uo2 at the output terminal Vout of the power supply 100 usually drops relatively slowly, so that the duration of the power conversion circuit 110 stopping working can reach the millisecond level.

[0068] In one embodiment of this application, the power demand of load 20 is compared with a first threshold power of the load. If the power demand is greater than the first threshold power, it indicates that the power consumption of load 20 is high and the power demand is also high. Figure 3a As shown, the control circuit 120 is also used to control the power conversion circuit 110 to operate when the demanded power is greater than the first threshold power, so that the voltage Uo2 at the output terminal Vout of the power supply 100 is within the regulated range [Vor-ΔV1, Vor+ΔV1], which is equivalent to the voltage Uo2 at the output terminal Vout of the power supply 100 being the rated voltage Vor. Therefore, when the load 20 has a high power demand, by controlling the power conversion circuit 110 to continue operating, the voltage Uo2 at the output terminal Vout of the power supply 100 can be kept within the regulated range [Vor-ΔV1, Vor+ΔV1], thus preventing excessive fluctuations in the voltage Uo2 at the output terminal Vout of the power supply 100 from affecting the load 20 and ensuring the stability and performance of the load 20.

[0069] Understandably, the power conversion circuit 110 has a switch, and the control circuit 120 enables the power conversion circuit 110 to perform boost or buck conversion functions by controlling the switching on and off. Based on this, in this embodiment, the operation of the power conversion circuit 110 can refer to the control circuit 120 outputting to the control terminal of the switch in the power conversion circuit 110. Figure 3b The pulse width modulation (PWM) signal shown controls the switch to periodically switch between on and off states, enabling the power conversion circuit 110 to boost or buck the AC voltage and output it as DC voltage. Furthermore, the power conversion circuit 110 stopping operation can mean that the control circuit 120 stops outputting the PWM signal to the switch in the power conversion circuit 110, keeping the switch in an off state, equivalent to the power supply being in a sleep state. For example, the control circuit 120 can output to the control terminal of the switch... Figure 3b The disconnect control signal Sc shown is used to keep the switch in an open state. Alternatively, the control circuit 120 may not output any signal to the switch, which is also equivalent to keeping the switch in an open state.

[0070] In one embodiment of this application, the energy storage device 160 may have the functions of storing electrical energy and outputting electrical energy. For example, referring to... Figure 4 , Figure 4 This is another schematic diagram of the power supply and load provided in the embodiments of this application. The energy storage device 160 is a capacitor Co, which is connected in parallel with the output terminal Vout of the power supply 100. This allows the power conversion circuit 110 to discharge through the capacitor Co, outputting electrical energy. Furthermore, since the architecture of the capacitor Co is relatively mature, the implementation of the energy storage device 160 is relatively simple, thereby reducing design difficulty and production costs. Additionally, the capacitor Co has a high charge-discharge cycle life, low energy loss during charging and discharging, and low maintenance costs. Moreover, to filter the voltage at the output terminal Vout of the power supply 100, a capacitor is usually connected in parallel at the output terminal Vout. This capacitor can be used as the capacitor Co, eliminating the need for an additional capacitor at the output terminal Vout of the power supply 100; a conventional capacitor can be used directly, further reducing production costs. In other embodiments of this application, the energy storage device can also be an energy storage battery. Alternatively, the energy storage device can also be other devices with the functions of storing and outputting electrical energy, such as devices controlled by a control circuit to output and store electrical energy. This application does not limit this.

[0071] As an example, the power demand of load 20 can be obtained through communication between power supply 100 and load 20. For example, refer to... Figure 4 The power supply 100 also includes a communication circuit 130, which is communicatively coupled to the load 20. Furthermore, the control circuit 120 is used to receive power information from the load 20 via the communication circuit 130, the power information indicating the required power. Thus, the control circuit 120 can obtain the required power of the load 20, and compare the required power with a first threshold power to control the operating state of the power conversion circuit 110.

[0072] As another example, the power consumption of load 20 changes, and its required current also changes. Since the current of load 20 is the same as the current at the output terminal Vout of power supply 100, to facilitate determining the relationship between the power demand of load 20 and the first threshold power, this relationship can be determined based on the relationship between the current at the output terminal Vout of power supply 100 and the first threshold current. For example, referring to… Figure 4The power supply 100 may further include a current detection circuit 140, which is coupled to the output terminal Vout of the power conversion circuit 110. The current detection circuit 140 can be used to detect the current at the output terminal Vout of the power supply 100. Based on this, if the current detected by the current detection circuit 140 is less than or equal to a first threshold current, it can be determined that the power demand of the load 20 is less than or equal to the first threshold power. If the current detected by the current detection circuit 140 is greater than the first threshold current, it can be determined that the power demand of the load 20 is greater than the first threshold power. Therefore, determining the relationship between the power demand of the load 20 and the first threshold power is relatively simple to implement, thereby reducing design difficulty and production costs.

[0073] For example, the current detection circuit 140 is also coupled to the control circuit 120, allowing the control circuit 120 to detect the current at the output terminal Vout of the power supply 100. The control circuit 120 can compare this current with a first threshold current. If the current detected by the current detection circuit 140 is less than or equal to the first threshold current, the control circuit 120 can control the power conversion circuit 110 to alternate between operating and stopping. Furthermore, if the current detected by the current detection circuit 140 is greater than the first threshold current, the control circuit 120 controls the power conversion circuit 110 to operate, ensuring that the voltage at the output terminal Vout of the power supply 100 is within the regulated range [Vor-ΔV1, Vor+ΔV1]. Additionally, the control circuit 120 is also used to perform overcurrent protection or undercurrent protection functions based on the current detected by the current detection circuit 140.

[0074] In one embodiment of this application, reference is made to... Figure 4 The power supply may also include a voltage detection circuit 150, which is coupled to the output terminal Vout of the power supply 100. The voltage detection circuit 150 is used to detect the voltage at the output terminal Vout of the power supply 100 and feeds the detected voltage back to the control circuit 120. This simplifies the implementation of the control circuit 120 in obtaining the voltage at the power supply's output terminal, reducing design complexity and production costs. Furthermore, the control circuit 120 is also used to perform overvoltage protection or undervoltage protection functions based on the voltage detected by the voltage detection circuit 150.

[0075] In some embodiments, the load has multiple device types and operating types, for example, referring to Figure 4The load 20 can be a communication device 200, and thus the power supply 100 in this embodiment can be used to power the communication device 200. In other embodiments of this application, the load can also be a terminal device or other devices that require power, including but not limited to mobile phones, laptops, and in-vehicle devices. Therefore, the operating state of the power conversion circuit 110 can be controlled based on the device type and operating type of the load 20, combined with its power demand, to improve the conversion efficiency of the power supply 100 and enable the power supply 100 to operate in a highly efficient state. The following describes the working process of the power supply in this embodiment in detail by taking the application of the power supply provided in this embodiment to power a communication device as an example. For the application of the power supply provided in this embodiment to power other devices, the process of applying it to power a communication device can be referred to the following process, and repeated parts will not be discussed.

[0076] During the operation of the communication device 200, it operates in various states, including heavy load, light load, and sleep. The power consumption and power demand vary depending on the operating state. For example, in a heavy load state, the power consumption and power demand are higher. In a light load or sleep state, the power consumption and power demand are lower. Therefore, when the power supply 100 in this embodiment supplies power to the communication device 200, controlling the operating state of the power conversion circuit 110 based on the power demand of the communication device 200 can improve the conversion efficiency of the power supply 100, enabling it to operate at high efficiency.

[0077] In some embodiments, the communication device 200 has many device types, including but not limited to RRU, BBU, etc., and the communication device also has many working types, including but not limited to TDD, non-TDD (e.g. FDD), etc.

[0078] As an example, refer to Figure 5a , Figure 5a This is a schematic diagram of a power supply and communication device in an embodiment of this application. The communication device 200 is of device type RRU210, and its operating type is non-TDD or TDD. The control circuit 120 can determine that the power supply 100 supplies power to the RRU210. Furthermore, the RRU210 is coupled to the output terminal Vout of the power supply 100. Exemplarily, the communication device 200 may include one or more RRUs 210. If the communication device 200 includes multiple RRUs 210, these multiple RRUs 210 can be connected in parallel to the output terminal of the power supply.

[0079] As yet another example, see Figure 5b , Figure 5bThis is another schematic diagram of the power supply and communication equipment in this application embodiment. The communication equipment 200 includes RRU 210 and BBU 220, and its operating type is non-TDD or TDD. The control circuit 120 can determine that the power supply 100 supplies power to the RRU 210 and BBU 220. Furthermore, the RRU 210 and BBU 220 are connected in parallel with the output terminal Vout of the power supply 100. Exemplarily, the communication equipment 200 may include one or more RRUs 210. If the communication equipment 200 includes multiple RRUs 210, these multiple RRUs 210 can be connected in parallel to the output terminal Vout of the power supply 100. Exemplarily, the communication equipment 200 may include one or more BBUs 220. If the communication equipment 200 includes multiple BBUs 220, these multiple BBUs 220 can be connected in parallel to the output terminal Vout of the power supply 100.

[0080] As yet another example, see Figure 5c , Figure 5c This is another schematic diagram of the power supply and communication device in this application embodiment. The communication device 200 is a BBU 220, and its operating type is non-TDD or TDD. The control circuit 120 can determine that the power supply 100 supplies power to the BBU 220. Furthermore, the BBU 220 is coupled to the output terminal Vout of the power supply 100. Exemplarily, the communication device 200 may include one or more BBUs 220. If the communication device 200 includes multiple BBUs 220, these multiple BBUs 220 can be connected in parallel to the output terminal Vout of the power supply 100.

[0081] Understandably, Figures 5a to 5c In the diagram, dashed lines with double-headed arrows represent signal flow, while dashed lines with single-headed arrows represent electrical signal flow.

[0082] In one embodiment of this application, the device type and operating type of the load 20 can be stored in the power supply 100. When the power supply 100 is working, the control circuit 120 can directly call the device type and operating type of the load 20.

[0083] In another embodiment of this application, the control circuit 120 can also be used to obtain device information sent by the load 20 through the communication circuit 130. The device information indicates the device type and operating type of the load, thereby enabling the control circuit 120 to obtain the device type and operating type of the load 20. For example, the communication device 200 can send its device information to the communication circuit 130 in the power supply 100 via a communication link, and the communication circuit 130 sends the received device information to the control circuit 120. Therefore, obtaining the device type and operating type of the communication device 200 by the control circuit 120 is relatively simple to implement, thereby reducing design difficulty and production costs. Thus, the required power of the load can be determined based on the device type and operating type.

[0084] For example, each time the power supply 100 is powered on, the communication device 200 sends device information to the communication circuit 130. The communication circuit 130 includes, but is not limited to, a power line communication (PLC) circuit, thereby allowing direct reuse of power cables to achieve communication coupling between the communication device 200 and the communication circuit 130. In other embodiments of this application, the communication circuit 130 may also include a wireless communication circuit, thereby enabling wireless communication coupling between the communication circuit and the communication device. It is understood that... Figure 4 In the diagram, dashed lines with double-headed arrows represent signal flow, while dashed lines with single-headed arrows represent electrical signal flow. Furthermore, the communication circuit 130 is used to report the current detected by the current detection circuit 140 and the voltage detected by the voltage detection circuit 150 to the power supply monitoring platform.

[0085] The following example uses communication device 200 with device type RRU210 and operating type non-TDD. Figure 5a and Figure 6 The working process of the power supply 100 in the embodiments of this application will be illustrated by example. Figure 6 This is a schematic diagram of a power waveform in an embodiment of this application.

[0086] After power supply 100 is powered on, control circuit 120 can obtain the device information sent by RRU 210 and determine that the output terminal Vout of power supply 100 is coupled to RRU 210 and the operating type is non-TDD. Based on this, if the current detected by current detection circuit 140 is less than or equal to the first threshold current, it indicates that the power demand of RRU 210 is less than or equal to the first threshold power, and the operating state of RRU 210 is light load state or sleep state. Control circuit 120 controls power conversion circuit 110 to stop working, and capacitor Co provides power to RRU 210 to prevent RRU 210 from losing power. Afterwards, when voltage Uo2 drops to the first voltage Uos1, control circuit 120 controls power conversion circuit 110 to start working again. Part of the power output Po1 of power conversion circuit 110 is provided to RRU 210 to power RRU 210 and ensure the power demand of RRU 210. The other part of the power output Po2 of power conversion circuit 110 is provided to capacitor Co, and capacitor Co is charged. Therefore, voltage Uo2 rises from the first voltage Uos1. When voltage Uo2 rises to the second voltage Uos2, control circuit 120 controls power conversion circuit 110 to stop working, temporarily halting the energy transfer process. Since the other part of the power output Po2 when power conversion circuit 110 is working is stored in capacitor Co, when power conversion circuit 110 stops working, power Po3 is output through capacitor Co to power RRU 210, preventing RRU 210 from losing power. Subsequently, when RRU 210 is in a light-load state or a sleep state, the working state of power conversion circuit 110 can alternate between working and stopping, causing voltage Uo2 to repeatedly exhibit the following trend: rising from the first voltage Uos1 to the second voltage Uos2, and then falling from the second voltage Uos2 back to the first voltage Uos1.

[0087] If the current detected by the current detection circuit 140 is greater than the first threshold current, it means that the power demand of RRU 210 is greater than the first threshold power. RRU 210 is in heavy load mode. The control circuit 120 controls the power conversion circuit 110 to work continuously, so that the voltage Uo2 is in the regulated range [Vor-ΔV1, Vor+ΔV1].

[0088] It is understood that, for communication equipment 200 whose device type includes at least one of BBU and RRU, and whose operating type is TDD or non-TDD, the operation process of power supply 100 can refer to the implementation method described above for communication equipment 200 whose device type is RRU and whose operating type is non-TDD. Therefore, the implementation method in this embodiment can match any device type and operating type of communication equipment 200 without requiring specific distinction between device type and operating type, thus exhibiting strong versatility.

[0089] In another embodiment of this application, a modification is made to the implementation method described in the previous embodiment. The differences between this embodiment and the previous embodiment are explained below, while the similarities are not repeated here. The device type of the load is the same as in the previous embodiment, and the operating type of the load 20 is TDD. For example, refer to... Figure 7 , Figure 7 This is a power waveform diagram illustrating the TDD (Transmission-Dependent Development) operation mode of the load in this embodiment. With load 20 operating in TDD mode, it demonstrates that load 20 is used in a TDD system. In a TDD system, downlink time slot t1 and uplink time slot t2 occur time-division multiplexed. The power demand P1 of load 20 in downlink time slot t1 is greater than its power demand P2 in uplink time slot t2; that is, the power consumption of load 20 in downlink time slot t1 is greater than its power consumption in uplink time slot t2. Based on this, combined with... Figure 8 As shown, Figure 8 As another power waveform diagram in this application embodiment, the control circuit 120 is further configured to: control the power conversion circuit 110 to stop working during a first time period Fs1, and the energy storage device 160 to supply power to the load 20. The first time period Fs1 corresponds to the uplink time slot t2 when the load 20 is operating under TDD conditions. Therefore, since the load 20's power demand is low during the uplink time slot t2, the overall loss of the power supply 100 is reduced by temporarily stopping the energy transfer process of the power conversion circuit 110. Furthermore, when the power conversion circuit 110 stops working, the energy storage device 160 provides power to the load 20, preventing the load 20 from losing power. Thus, when the load 20's power demand is less than or equal to the load's first threshold power, and during the uplink time slot t2, the overall loss of the power supply 100 can be reduced while preventing the load 20 from losing power, thereby improving the conversion efficiency of the power supply 100 and enabling the power supply 100 to operate at high efficiency.

[0090] Furthermore, referring to Figure 8In a first time period Fs1, the voltage Uo2 at the output terminal Vout of the power supply 100 drops, such that the voltage Uo2 is lower than the minimum value Vor-ΔV1 of the voltage regulation range [Vor-ΔV1, Vor+ΔV1] of the rated voltage Vor of the power supply 100, that is, in the first time period Fs1, the voltage Uo2 shows a downward trend, and during the drop of the voltage Uo2, there exists a situation where the voltage Uo2 is lower than Vor-ΔV1. Furthermore, at the end of the first time period Fs1, the voltage Uo2 can drop to a third voltage Uos3. It can be understood that the third voltage Uos3 can be lower than Vor-ΔV1 and higher than Vir-ΔV2, that is, Vir-ΔV2 < Uos3 < Vor-ΔV1, which can prevent the load 20 from powering off. Illustratively, the absolute value |ΔVos5| of the difference ΔVos5 between the third voltage Uos3 and Vor-ΔV1 is greater than zero, and the absolute value |ΔVos6| of the difference ΔVos6 between the third voltage Uos3 and Vir-ΔV2 is greater than zero. As an example, |ΔVos6| ≤ |ΔVos5|, so that the third voltage Uos3 can be close to Vir-ΔV2. In addition, the third voltage Uos3 and the first voltage Uos1 can be the same or different. In some embodiments, the specific value of the third voltage Uos3 can be flexibly designed according to the requirements of actual application scenarios, and is not limited herein.

[0091] In an embodiment of the present application, when the operation type of the load 20 is TDD, uplink time slots t1 and downlink time slots t2 are alternated. In combination with Figure 8 as shown, the control circuit 120 is further configured to: control the power conversion circuit 110 to operate in a second time period Fs2, so that the energy storage device 160 is charged. Wherein, the second time period Fs2 corresponds to the time period of the downlink time slot t1 in the TDD mode. Therefore, since when the load 20 operates in the time period of the downlink time slot t1, its required power is higher than the required power in the time period of the uplink time slot t2, the power conversion circuit 110 can be controlled to operate, a part of power Po4 output by the power conversion circuit 110 is provided to the load 20 to supply power to the load 20, so as to ensure the power requirement of the load 20, and another part of power Po5 output by the power conversion circuit 110 is provided to the energy storage device 160, so that the energy storage device 160 is charged.

[0092] Furthermore, referring to Figure 8In the second time period Fs2, the voltage Uo2 at the output terminal Vout of the power supply 100 rises, so that the voltage Uo2 is greater than the maximum value Vor+ΔV1 of the voltage stabilizing range [Vor-ΔV1, Vor+ΔV1] of the rated voltage Vor of the power supply 100. That is, in the second time period Fs2, the voltage Uo2 shows an upward trend, and during the rising process of the voltage Uo2, there exists a situation where the voltage Uo2 is greater than Vor+ΔV1. Moreover, when the second time period Fs2 ends, the voltage Uo2 can rise to the fourth voltage Uos4. It can be understood that the fourth voltage Uos4 can be greater than Vor+ΔV1 and less than Vir+ΔV2, that is, Vor+ΔV1<Uos4<Vir+ΔV2, which can avoid damaging the load 20. Illustratively, the absolute value |ΔVos7| of the difference ΔVos7 between the fourth voltage Uos4 and Vor+ΔV1 is greater than zero, and the absolute value |ΔVos8| of the difference ΔVos8 between the fourth voltage Uos4 and Vir+ΔV2 is greater than zero. As an example, |ΔVos8|≤|ΔVos7|, so that the fourth voltage Uos4 can be close to Vir+ΔV2. In addition, the fourth voltage Uos4 and the second voltage Uos2 can be the same or different. In some embodiments, the specific value of the fourth voltage Uos4 can be flexibly designed according to the requirements of actual application scenarios, which is not limited here.

[0093] As an example, the control circuit 120 can control the working states of the power conversion circuit 110 in the first time period Fs1 and the second time period Fs2 based on the accumulated time. Illustratively, in combination with Figure 8As shown, when the power conversion circuit 110 stops operating, the control circuit 120 accumulates time to obtain a first duration Tc1. For example, starting from the moment when the power conversion circuit 110 switches from operating to stopping operating, the control circuit 120 starts timing from T02 and accumulates time to obtain the first duration Tc1, which is the holding duration when the power conversion circuit 110 is in a stopped state. Then, the first duration Tc1 is compared with a first duration threshold Vth1, where the first duration threshold Vth1 is the same as the downlink time slot, based on which it can be determined whether the power conversion circuit 110 is in a first time period Fs1. For example, when Tc1 < Vth1, it indicates that the power conversion circuit 110 is still in the first time period, and the control circuit continues to control the power conversion circuit 110 to keep stopping operating. When Tc1 reaches Vth1, it indicates that the power conversion circuit 110 is about to enter the second time period from the first time period, and the control circuit controls the power conversion circuit 110 to start operating. Furthermore, when the power conversion circuit 110 is operating, the control circuit 120 accumulates time to obtain a second duration Tc2. For example, starting from the moment when the power conversion circuit 110 switches from stopping to operating, the control circuit 120 starts timing from T01 and accumulates time to obtain the second duration Tc2, which is the holding duration when the power conversion circuit 110 is operating. Then, the second duration Tc2 is compared with a second duration threshold Vth2, where the second duration threshold Vth2 is the same as the downlink time slot, based on which it can be determined whether the power conversion circuit 110 is in a second time period Fs2. For example, when Tc2 < Vth2, it indicates that the power conversion circuit 110 is still in the second time period, and the control circuit continues to control the power conversion circuit 110 to keep operating. When Tc2 reaches Vth2, it indicates that the power conversion circuit 110 is about to enter the first time period from the second time period, and the control circuit controls the power conversion circuit 110 to stop operating. Accordingly, the operating state of the power conversion circuit 110 can be switched between operating and stopping based on accumulated time, which enables control of the operating state of the power conversion circuit 110 in the first time period and the second time period, is relatively simple to implement, thereby reducing design difficulty and production cost.

[0094] It can be understood that T01 and T02 may be the same or different, and T01 and T02 may be 0 or other values, which can be flexibly designed according to the requirements of actual application scenarios, and are not limited herein.

[0095] For example, the uplink time slot t2 and downlink time slot t1 of TDD can be obtained through communication between the power supply 100 and the load 20. The durations of the first time period Fs1 and the second time period Fs2 can then be configured based on the obtained uplink time slot t2 and downlink time slot t1. For example, after the power supply 100 is powered on, the load 20 can send the uplink time slot t2 and downlink time slot t1 of TDD to the communication circuit 130 via the communication link. The communication circuit 130 then sends the uplink time slot t2 and downlink time slot t1 to the control circuit 120. The control circuit 120 can configure the duration of the first time period Fs1 based on the uplink time slot t2, and configure the duration of the second time period Fs2 based on the downlink time slot t1. It is understood that the uplink time slot t2 and the downlink time slot t1 can be the same or different; therefore, the durations of the first time period Fs1 and the second time period Fs2 can be the same or different. Of course, the durations of the first time period Fs1 and the second time period Fs2 can be flexibly designed according to the uplink time slot t2 and downlink time slot t1 in the actual application scenario. In addition, the uplink time slot t2 and downlink time slot t1 are usually in the millisecond range, so in this embodiment, the duration for which the power conversion circuit 110 stops working can also reach the millisecond range.

[0096] For example, when the load operates under TDD conditions, the current at the output terminal Vout of the power supply 100 during the second time period Fs2 can be detected by the current detection circuit 140. Based on the relationship between this current and a first threshold current, the relationship between the power demand of the load 20 and the first threshold power can be determined. In other embodiments of this application, the real-time current at the output terminal Vout of the power supply 100 can also be detected by the current detection circuit 140, and the relationship between this current and the first threshold current can be determined based on the relationship between this current and the first threshold current.

[0097] In one embodiment of this application, the control circuit 120 is further configured to: control the power conversion circuit 110 to remain operational after the power supply 100 is powered on, supplying power to the load 20. Furthermore, during the operation of the power conversion circuit 110 after the power supply 100 is powered on, based on the acquired uplink time slot t2, downlink time slot t1, and the current detected by the current detection circuit 140 of the power conversion circuit 110, the control circuit 120 can identify the switching time between the uplink time slot t2 and the downlink time slot t1 of the load 20. Therefore, when the power demand of the load 20 is less than or equal to a first threshold power of the load 20, the control circuit 120 controls the power conversion circuit 110 to enter the first time period Fs1 and the second time period Fs2 respectively, ensuring that the power supply 100 remains in a highly efficient operating state.

[0098] In one embodiment of this application, when the power demand of the load 20 exceeds a first threshold power, the power conversion circuit 110 is controlled to operate, so that the voltage Uo2 at the output terminal Vout of the power supply 100 is within the regulated range [Vor-ΔV1, Vor+ΔV1]. Therefore, when the load 20 has a high power demand, excessive voltage fluctuations in Uo2 can be avoided, preventing them from affecting the load 20 and ensuring the stability and performance of the load 20. In other embodiments of this application, when the power demand of the load 20 exceeds the first threshold power, the control circuit 120 can also be used to control the power conversion circuit 110 to stop operating during a first time period Fs1 and to operate during a second time period Fs2. Therefore, even when the load 20 is in a heavy-load state, the operating state of the power conversion circuit 110 can be switched between operating and stopped.

[0099] The following example uses communication device 200, which is of type RRU210 and operating type TDD, to illustrate this. Figure 5a and Figure 8 The working process of the power supply 100 in the embodiments of this application will be illustrated by example.

[0100] After power supply 100 is powered on, control circuit 120 can obtain the uplink time slot t2, downlink time slot t1, and device information sent by RRU 210, and determine that the output terminal Vout of power supply 100 is coupled to RRU 210 and the operating type is TDD. Furthermore, control circuit 120 can configure the duration of the first time period Fs1 based on the obtained uplink time slot t2, and configure the duration of the second time period Fs2 based on the obtained downlink time slot t1. Based on this, if the current detected by current detection circuit 140 is less than or equal to the first threshold current, it indicates that RRU 210 is in a light load state or a sleep state. RRU 210 operates in uplink time slot t2, power conversion circuit 110 is in the first time period Fs1, and control circuit 120 controls power conversion circuit 110 to stop working, reducing the overall power loss of power supply 100. Subsequently, RRU 210 operates in downlink time slot t1, and power conversion circuit 110 is in the second time period Fs2. Control circuit 120 controls power conversion circuit 110 to operate, and a portion of the power output Po4 from power conversion circuit 110 is provided to RRU 210 to power it and ensure its power requirements. The other portion of the power output Po4 is provided to capacitor Co, which charges. Afterwards, RRU 210 operates in uplink time slot t2, and power conversion circuit 110 is again in the first time period Fs1. Control circuit 120 controls power conversion circuit 110 to stop operating. Since the other portion of the power output Po5 from power conversion circuit 110 in the second time period Fs2 is stored in capacitor Co, capacitor Co discharges and outputs power Po6 in the current first time period Fs1 to power RRU 210 and prevent RRU 210 from losing power. Subsequently, when the RRU 210 is in a light load state or a sleep state, the power conversion circuit 110 operates in an alternating mode of working and stopping when uplink time slot t2 and downlink time slot t1 occur.

[0101] If the current detected by the current detection circuit 140 is greater than the first threshold current, it indicates that the power demand of RRU 210 is greater than the first threshold power. RRU 210 is in heavy load mode. The control circuit 120 controls the power conversion circuit 110 to work, so that the voltage Uo2 is in the regulated range [Vor-ΔV1, Vor+ΔV1].

[0102] It is understood that, for communication device 200 whose device type includes at least one of BBU and RRU, and whose operating type is TDD, the power supply operation process can refer to the implementation method described above for communication device 200 whose device type is RRU and whose operating type is TDD. Therefore, the implementation method in this embodiment can match any device type when the communication device 200's operating type is TDD, without needing to specifically distinguish the device type, thus exhibiting strong versatility.

[0103] In another embodiment of this application, the implementation method in the above embodiments has been modified. The differences between this embodiment and the above embodiments are described below, and the similarities are not repeated here. When the operating type of load 20 is TDD, the power demand of load 20 is less than or equal to the first threshold power of the load, and the power demand of load 20 in the second time period Fs2 is less than or equal to the second threshold power. This indicates that the power consumption of load 20 in the downlink time slot t1 is also very low, and the power supply of energy storage device 160 can continue for a considerable period of time. Based on this, control circuit 120 controls power conversion circuit 110 to stop working in the second time period Fs2, so that load 20 is also powered by energy storage device 160 in the downlink time slot t1, further improving the conversion efficiency of power supply 100 and further enabling power supply 100 to operate in a highly efficient state.

[0104] For example, the power demand of load 20 is less than or equal to the first threshold power, and the power demand of load 20 in the second time period Fs2 is greater than the second threshold power, and the control circuit 120 controls the power conversion circuit 110 to operate in the second time period Fs2.

[0105] It is understandable that the second threshold power is less than the first threshold power. Furthermore, the specific value of the second threshold power can be flexibly designed according to the needs of the actual application scenario, and is not limited here.

[0106] For example, the relationship between the power demand of load 20 during the second time period Fs2 and the second threshold power can also be determined based on the relationship between the current at the output terminal Vout of power supply 100 during the second time period Fs2 and the second threshold current. The second threshold current is less than the first threshold current. If the current at the output terminal Vout of power supply 100 during the second time period Fs2 is less than or equal to the second threshold current, it indicates that the power demand of load 20 during the second time period Fs2 is less than or equal to the second threshold power. If the current at the output terminal Vout of power supply 100 during the second time period Fs2 is greater than the second threshold current, it indicates that the power demand of load 20 during the second time period Fs2 is greater than the second threshold power.

[0107] The following example uses communication device 200, which is of type RRU210 and operating type TDD, to illustrate this. Figure 5a and Figure 8 The working process of the power supply 100 in the embodiments of this application will be illustrated by example.

[0108] When the current detected by the current detection circuit 140 is less than or equal to the first threshold current, the RRU 210 operates in the uplink time slot t2, the power conversion circuit 110 is in the first time period Fs1, and the control circuit 120 controls the power conversion circuit 110 to stop operating, reducing the overall power loss of the power supply 100. Afterwards, the RRU 210 operates in the downlink time slot t1, the power conversion circuit 110 is in the second time period Fs2, and when the current at the output terminal Vout of the power supply 100 in the second time period Fs2 is less than or equal to the second threshold current, the control circuit 120 controls the power conversion circuit 110 to stop operating. When the current at the output terminal Vout of the power supply 100 in the second time period Fs2 is greater than the second threshold current, the control circuit 120 controls the power conversion circuit 110 to operate. The remaining operating procedures can be referred to the content in the above embodiments, and will not be elaborated here.

[0109] In another embodiment of this application, modifications are made to the implementation methods described in the above embodiments. The differences between this embodiment and the above embodiments are explained below, while the similarities are not repeated here. When the operating type of the load 20 is TDD, the power demand of the load 20 is less than or equal to the first threshold power of the load, and when the power conversion circuit 110 is in the second time period Fs2, and the power demand of the load 20 in the second time period Fs2 is less than or equal to the second threshold power, the control circuit 120 can also control the operating state of the power conversion circuit 110 to switch from working to stopped working.

[0110] The following example uses communication device 200, which is of type RRU210 and operating type TDD, to illustrate this. Figure 5a and Figure 8 The working process of the power supply 100 in the embodiments of this application will be illustrated by example.

[0111] When the current detected by the current detection circuit 140 is less than or equal to the first threshold current, the RRU 210 operates in the uplink time slot t2, the power conversion circuit 110 is in the first time period Fs1, and the control circuit 120 controls the power conversion circuit 110 to stop operating, reducing the overall loss of the power supply 100. Afterwards, the RRU 210 operates in the downlink time slot t1, and the control circuit 120 controls the power conversion circuit 110 to operate in the second time period Fs2. During the operation of the power conversion circuit 110, if the current at the output terminal Vout of the power supply 100 in the second time period Fs2 is less than or equal to the second threshold current, the control circuit 120 controls the power conversion circuit 110 to stop operating. The remaining operating procedures can be referred to the content in the above embodiment, and will not be elaborated here.

[0112] In another embodiment of this application, the implementation method in the above embodiments is modified. The differences between this embodiment and the above embodiments are described below, while the similarities are not repeated here. The device type of the load is the same as in the above embodiments, and the operating type of the load 20 is TDD. Exemplarily, when the operating type of the load 20 is TDD, the required power of the load 20 is compared with the first threshold power of the load. If the required power is greater than the first threshold power, the control circuit 120 is further used to control the power conversion circuit 110 to stop working in the first time period Fs1 and to control the power conversion circuit 110 to work in the second time period Fs2. Thus, even when the operating state of the load 20 is heavy load, the operating state of the power conversion circuit 110 can be switched between working and stopping, further improving the conversion efficiency of the power supply 100 and further enabling the power supply 100 to operate in a high-efficiency state. It is understood that the implementation method of controlling the power conversion circuit 110 to stop working in the first time period Fs1 and controlling the power conversion circuit 110 to work in the second time period Fs2 can refer to the relevant content in the above embodiments, and will not be repeated here.

[0113] The following example uses communication device 200, which is of type RRU210 and operating type TDD, to illustrate this. Figure 5a and Figure 8 The working process of the power supply 100 in the embodiments of this application will be illustrated by example.

[0114] When the current detected by the current detection circuit 140 exceeds the first threshold current, RRU 210 operates in the uplink time slot t2, the power conversion circuit 110 is in the first time period Fs1, and the control circuit 120 controls the power conversion circuit 110 to stop operating, reducing the overall power loss of the power supply 100. Afterwards, RRU 210 operates in the downlink time slot t1, the power conversion circuit 110 is in the second time period Fs2, and the control circuit 120 controls the power conversion circuit 110 to operate. A portion of the power output Po4 from the power conversion circuit 110 is provided to RRU 210 to power it and ensure its power requirements. The other portion of the power output Po4 is provided to capacitor Co, which charges Co. Subsequently, RRU 210 operates in uplink time slot t2, and power conversion circuit 110 is in the first time period Fs1. Control circuit 120 controls power conversion circuit 110 to stop operating. Since another portion of the power Po5 output by power conversion circuit 110 in the second time period Fs2 is stored in capacitor Co, capacitor Co discharges and outputs power Po6 in this first time period Fs1, supplying power to RRU 210 and preventing RRU 210 from losing power. Afterwards, the operating state of power conversion circuit 110 alternates between operating and stopping during uplink time slot t2 and downlink time slot t1.

[0115] It is understood that, for communication device 200 whose device type includes at least one of BBU and RRU, and whose operating type is TDD, the power supply operation process can refer to the implementation method described above for communication device 200 whose device type is RRU and whose operating type is TDD. Therefore, the implementation method in this embodiment can also be matched with any device type when the operating type of communication device 200 is TDD, without needing to specifically distinguish the device type, thus exhibiting strong versatility.

[0116] Based on the same inventive concept, this application also provides a power supply control method, which includes: when the power demand of the load is less than or equal to a first threshold power of the load, the control circuit in the power supply controls the power conversion circuit in the power supply to stop working, so that the energy storage device in the power supply provides electrical energy to the load, and the voltage at the output terminal of the power supply is less than the minimum value of the voltage regulation range of the rated voltage of the power supply; wherein, the power conversion circuit is used to convert AC power into DC power and provide DC power to the load through the output terminal of the power supply, and the energy storage device is connected in parallel with the power conversion circuit between the positive and negative terminals of the output terminal.

[0117] In one embodiment of this application, the method further includes: when the voltage at the output terminal of the power supply drops to a first voltage, the control circuit controls the power conversion circuit to operate, and the energy storage device is charged, so that the voltage at the output terminal of the power supply is greater than the maximum value of the voltage regulation range of the power supply's rated voltage, and the first voltage is less than the minimum value of the voltage regulation range and greater than the minimum value of the allowable range of the load's supply voltage.

[0118] In one embodiment of this application, the method further includes: when the voltage at the output terminal of the power supply rises to a second voltage, the control circuit controls the power conversion circuit to stop working; wherein the second voltage is greater than the maximum value of the voltage regulation range and less than the maximum value of the allowable range.

[0119] In one embodiment of this application, the method includes: controlling a power conversion circuit to stop working during a first time period, wherein the first time period corresponds to the time period of the uplink time slot when the load's working type is time-division duplex.

[0120] In one embodiment of this application, the method further includes: controlling the power conversion circuit to operate during a second time period, charging the energy storage device, such that the voltage at the output terminal of the power supply is greater than the maximum value of the voltage regulation range of the rated voltage of the power supply, wherein the second time period corresponds to the downlink time slot time period in time-division duplex mode.

[0121] In one embodiment of this application, the method further includes: when the required power is greater than a first threshold power, controlling the power conversion circuit to stop working during a first time period, and controlling the power conversion circuit to work during a second time period; wherein, the first time period corresponds to the time period of the uplink time slot when the load's working type is time-division duplex, and the second time period corresponds to the time period of the downlink time slot when the load's working type is time-division duplex.

[0122] The above description is only a specific implementation of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A power supply, characterized in that, It includes a power conversion circuit, an energy storage device, and a control circuit. The power conversion circuit is used to convert alternating current into direct current and provide the direct current to the load through the output terminal of the power supply. The energy storage device is connected in parallel with the power conversion circuit between the positive and negative terminals of the output terminal. The control circuit is used to: control the power conversion circuit to stop working when the power demand of the load is less than or equal to a first threshold power of the load; The energy storage device is used to provide electrical energy to the load after the power conversion circuit stops working.

2. The power supply according to claim 1, characterized in that, The control circuit is further configured to: control the power conversion circuit to operate when the voltage at the output terminal of the power supply drops to a first voltage, the power conversion circuit being configured to charge the energy storage device, wherein the first voltage is less than the minimum value of the voltage regulation range of the rated voltage of the power supply and greater than the minimum value of the allowable range of the supply voltage of the load.

3. The power supply according to claim 2, characterized in that, The control circuit is further configured to: control the power conversion circuit to stop working when the voltage at the output terminal of the power supply rises to a second voltage; wherein the second voltage is greater than the maximum value of the voltage regulation range and less than the maximum value of the allowable range.

4. The power supply according to claim 1, characterized in that, The control circuit is further configured to: control the power conversion circuit to stop working during a first time period, wherein the first time period corresponds to the time period of the uplink time slot when the load's working type is time-division duplex.

5. The power supply according to claim 4, characterized in that, The control circuit is also used to: control the power conversion circuit to operate during a second time period, the power conversion circuit being used to charge the energy storage device, the second time period corresponding to the downlink time slot time period in the time-division duplex case.

6. The power supply according to claim 4 or 5, characterized in that, The control circuit is further configured to: control the power conversion circuit to stop working when the power demand of the load during the second time period is less than or equal to the second threshold power; wherein the second time period corresponds to the downlink time slot time period in the time-division duplex case, and the second threshold power is less than the first threshold power.

7. The power supply according to any one of claims 1-6, characterized in that, The control circuit is further configured to: control the power conversion circuit to stop working during a first time period when the required power is greater than the first threshold power, and control the power conversion circuit to work during a second time period; wherein the first time period corresponds to the time period of the uplink time slot when the load's working type is time-division duplex, and the second time period corresponds to the time period of the downlink time slot when the load's working type is time-division duplex.

8. The power supply according to any one of claims 1-6, characterized in that, The control circuit is also used to control the power conversion circuit to operate when the required power is greater than the first threshold power.

9. The power supply according to any one of claims 1-8, characterized in that, The power supply also includes a communication circuit for communication coupling with the load; The control circuit is also used to obtain device information sent by the load through the communication circuit. The device information is used to indicate the device type and operating type of the load, so as to determine the required power of the load based on the device type and the operating type.

10. The power supply according to any one of claims 1-9, characterized in that, The power supply also includes a current detection circuit, which is coupled to the output terminal of the power supply. The current detection circuit is used to detect the current at the output terminal of the power supply; wherein, if the current is less than or equal to a first threshold current, it is determined that the required power is less than or equal to the first threshold power.

11. The power supply according to any one of claims 1-9, characterized in that, The power supply also includes a communication circuit for communication coupling with the load; The control circuit is also used to: receive power information sent by the load through the communication circuit, the power information being used to indicate the required power.

12. The power supply according to any one of claims 1-11, characterized in that, The power supply further includes a voltage detection circuit, which is coupled to the output terminal of the power supply and is used to detect the voltage at the output terminal of the power supply.

13. A method for controlling a power supply, characterized in that, The method includes: When the power demand of the load is less than or equal to the first threshold power of the load, the control circuit in the power supply controls the power conversion circuit in the power supply to stop working, and the energy storage device in the power supply provides electrical energy to the load after the power conversion circuit stops working; The power conversion circuit is used to convert alternating current into direct current and provide the direct current to the load through the output terminal of the power supply. The energy storage device is connected in parallel with the power conversion circuit between the positive and negative terminals of the output terminal.

14. The method according to claim 13, characterized in that, The method further includes: when the voltage at the output terminal of the power supply drops to a first voltage, the control circuit controls the power conversion circuit to operate, and the power conversion circuit charges the energy storage device, wherein the first voltage is less than the minimum value of the voltage regulation range of the rated voltage of the power supply and greater than the minimum value of the allowable range of the supply voltage of the load.

15. The method according to claim 14, characterized in that, The method further includes: when the voltage at the output terminal of the power supply rises to a second voltage, the control circuit controls the power conversion circuit to stop working; wherein the second voltage is greater than the maximum value of the voltage regulation range and less than the maximum value of the allowable range.

16. The method according to claim 13, characterized in that, The method includes: controlling the power conversion circuit to stop working during a first time period, wherein the first time period corresponds to the time period of the uplink time slot when the load's working type is time-division duplex.

17. The method according to claim 16, characterized in that, The method further includes: controlling the power conversion circuit to operate during a second time period, the power conversion circuit being used to charge the energy storage device, the second time period corresponding to the downlink time slot time period in the time-division duplex case.

18. The method according to any one of claims 13-17, characterized in that, The method further includes: when the required power is greater than the first threshold power, controlling the power conversion circuit to stop working during a first time period, and controlling the power conversion circuit to work during a second time period; wherein, the first time period corresponds to the time period of the uplink time slot when the load's working type is time-division duplex, and the second time period corresponds to the time period of the downlink time slot when the load's working type is time-division duplex.

19. A power supply device, characterized in that, include: The housing and the power supply as described in any one of claims 1-12; The housing is equipped with a first interface and a second interface. The input terminal of the power supply is coupled to the first interface, and the output terminal of the power supply is coupled to the second interface.

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