Baseband unit, power supply method, system and base station

Abstract

The embodiment of the invention discloses a baseband unit, a power supply method, a power supply system and a base station, and relates to but not limited to the technical field of electric power. The baseband unit comprises a first alternating-current power supply, a direct-current power supply and a load, a first output end of the first alternating-current power supply and an output end of the direct-current power supply are coupled with the load, and a first input end of the direct-current power supply is used for being coupled with an output end of a standby battery. The first alternating-current power supply is used for receiving alternating-current voltage and outputting first direct-current voltage according to the alternating-current voltage, and the first direct-current voltage is used for supplying power to the load. And the direct current power supply is used for receiving a second direct current voltage provided by the standby battery when the first alternating current power supply does not receive the alternating current voltage and outputting a third direct current voltage according to the second direct current voltage, and the third direct current voltage is used for supplying power to the load. Therefore, when the commercial power supply providing the AC voltage supplies power normally, the power supply conversion efficiency is high.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of power technology, and in particular to a baseband unit, a power supply method, a system and a base station. Background Art

[0002] The baseband unit (BBU) is an important part of the base station. It can complete the functions of uplink and downlink baseband data processing and control the equipment in the base station. In practical applications, a power supply system needs to be set up to convert the AC power provided by the mains power supply into DC power to power the BBU to ensure the normal operation of the BBU. The power supply system in the prior art has the problem of low power conversion efficiency of the BBU power supply system when the mains power supply is normal. Summary of the invention

[0003] The embodiments of the present application provide a baseband unit, a power supply method, a system and a base station, which solve the problem in the prior art that the power conversion efficiency of the BBU power supply system is low when the mains power supply is normally supplied.

[0004] In order to achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0005] In a first aspect, a baseband unit is provided, the baseband unit comprising: a first AC power supply, a DC power supply and a load, wherein the first output terminal of the first AC power supply and the output terminal of the DC power supply are coupled to the load, and the first input terminal of the DC power supply is used to couple with the output terminal of a backup battery. The first AC power supply is used to receive an AC voltage, and output a first DC voltage according to the AC voltage, and the first DC voltage is used to power the load. The DC power supply is used to receive a second DC voltage provided by the backup battery when the first AC power supply does not receive the AC voltage, and output a third DC voltage according to the second DC voltage, and the third DC voltage is used to power the load.

[0006] In the above technical solution, the first AC power supply is set to receive the AC voltage and output the first DC voltage according to the AC voltage. The DC power supply is also set to receive the second DC voltage provided by the backup battery when the first AC power supply does not receive the AC voltage, and output the third DC voltage according to the second DC voltage. In this way, on the one hand, the AC voltage is converted into the first DC voltage by the first AC power supply, the power conversion level of the entire link is 1, and the power conversion efficiency is relatively high. On the other hand, there is only a distribution path loss in the process of transmitting the AC voltage to the first AC power supply, and the distribution path loss is relatively small.

[0007] In a possible implementation of the first aspect, the first AC power supply is further used to send first shutdown information when outputting the first DC voltage, and the first shutdown information is used to instruct to shut down the DC power supply. The DC power supply is also used to receive the first shutdown information and shut down according to the first shutdown information. In the above possible implementation, the first AC power supply sends the first shutdown information to shut down the DC power supply when outputting the first DC voltage. In this way, the DC power supply can stop receiving the second DC voltage of the backup battery, reducing the basic conversion power consumption of the DC power supply.

[0008] In a possible implementation of the first aspect, the first AC power supply is further used to send a first startup message when the AC voltage is not received, and the first startup message is used to instruct the startup of the DC power supply. The DC power supply is also used to receive the first startup message and start according to the first startup message. In the above possible implementation, the first AC power supply sends a first startup message when the AC voltage is not received, and the first startup message is used to instruct the startup of the DC power supply, so that the DC power supply can receive the second DC voltage provided by the backup battery when the AC power supply is abnormal, and output the third DC voltage according to the second DC voltage. In this way, it can be avoided that the load cannot be powered when the AC power is abnormal.

[0009] In a possible implementation of the first aspect, the first AC power supply includes a first control circuit, a first power circuit, and a first detection circuit. The first detection circuit is used to detect the third DC voltage and send detection information when the first AC power supply receives the AC voltage, and the detection information is used to indicate the third DC voltage. The first control circuit is used to receive the detection information and send control information, and the control information is used to indicate the output of the first DC voltage, and the first DC voltage is determined according to the third DC voltage. The first power circuit is used to receive the control information and output the first DC voltage according to the control information and the AC voltage. In the above possible implementation, the third DC voltage is detected by the first detection circuit, and the first power circuit is controlled by the first control circuit to output the first DC voltage determined according to the third DC voltage, so that the baseband unit outputs the first DC voltage to power the load. In this way, on the one hand, it provides a basis for improving the power conversion efficiency. On the other hand, it provides a basis for reducing the loss of the distribution path.

[0010] In a possible implementation of the first aspect, the first DC voltage is greater than the third DC voltage. In the above possible implementation, the first AC power supply and the DC power supply form a combined power supply, and the first AC power supply outputs a first DC voltage greater than the third DC voltage so that the combined power supply outputs a larger first DC power supply. In this way, on the one hand, a basis is provided for improving power conversion efficiency. On the other hand, a basis is provided for reducing power distribution path losses.

[0011] In a possible implementation of the first aspect, the first AC power supply also includes a second detection circuit. The second detection circuit is used to send the first startup information when the AC voltage is not detected. In the above possible implementation, a second detection circuit is set to detect whether the mains power is abnormal, and the first startup information is sent through the second detection device when the mains power is abnormal (the AC voltage is not detected), so that the DC power supply can receive the second DC voltage provided by the backup battery when the mains power supply is abnormal, and output the third DC voltage according to the second DC voltage. In this way, it can be avoided that the load cannot be powered when the mains power is abnormal.

[0012] In a possible implementation manner of the first aspect, the DC power supply includes a second control circuit and a second power circuit.

[0013] The second control circuit is used to receive the first startup information, and send the second startup information according to the first startup information, and the second startup information is used to instruct to start the second power circuit. The second power circuit is used to start when receiving the second startup information, and receive the second DC voltage, and output the third DC voltage according to the second DC voltage. In the above possible implementation, the second detection circuit communicates with the second control circuit, so that the second control circuit controls the startup of the second power circuit, so that the second power circuit receives the second DC voltage provided by the backup battery when the mains power supply is abnormal, and outputs the third DC voltage according to the second DC voltage. In this way, it can be avoided that the load cannot be powered when the mains power supply is abnormal.

[0014] In a possible implementation of the first aspect, the DC power supply includes a second control circuit and a second power circuit. The second control circuit is used to receive the first shutdown information, and send the second shutdown information according to the first shutdown information, and the second shutdown information is used to instruct to shut down the second power circuit. The second power circuit is used to shut down when receiving the second shutdown information. In the above possible implementation, the first AC power supply and the second control circuit communicate, so that the second control circuit controls the second power circuit to shut down, thereby shutting down the DC power supply when the AC power supply is normal. In this way, the DC power supply can stop receiving the second DC voltage of the backup battery, reducing the basic conversion power consumption of the DC power supply.

[0015] In a second aspect, a power supply method is provided, the method being applied to a baseband unit, the baseband unit comprising: a first AC power supply, a DC power supply and a load, the first output end of the first AC power supply and the output end of the DC power supply both being coupled to the load, and the first input end of the DC power supply being used to couple to the output end of a backup battery. The method comprises: the first AC power supply receiving an AC voltage, outputting a first DC voltage according to the AC voltage, the first DC voltage being used to power the load. When the first AC power supply does not receive the AC voltage, the DC power supply receives a second DC voltage provided by the backup battery, outputs a third DC voltage according to the second DC voltage, the third DC voltage being used to power the load.

[0016] In a possible implementation manner of the second aspect, the method further includes: the first AC power supply sends first shutdown information when outputting the first DC voltage, the first shutdown information being used to instruct to shut down the DC power supply. The DC power supply receives the first shutdown information and shuts down according to the first shutdown information.

[0017] In a possible implementation of the second aspect, the method further includes: the first AC power supply sends first startup information when the AC voltage is not received, the first startup information being used to instruct the DC power supply to start. The DC power supply receives the first startup information and starts according to the first startup information.

[0018] In a possible implementation of the second aspect, the first AC power supply includes a first control circuit, a first power circuit, and a first detection circuit. The first AC power supply receives an AC voltage and outputs a first DC voltage according to the AC voltage, including: when the first AC power supply receives the AC voltage, the first detection circuit detects the third DC voltage and sends detection information, where the detection information is used to indicate the third DC voltage. The first control circuit receives the detection information and sends control information, where the control information is used to indicate outputting the first DC voltage, where the first DC voltage is determined according to the third DC voltage. The first power circuit receives the control information and outputs the first DC voltage according to the control information and the AC voltage.

[0019] In a possible implementation manner of the second aspect, the first DC voltage is greater than the third DC voltage.

[0020] In a possible implementation of the second aspect, the first AC power supply further includes a second detection circuit. The first AC power supply sends the first startup information when the AC voltage is not received, including: the second detection circuit sends the first startup information when the AC voltage is not detected.

[0021] In a possible implementation manner of the second aspect, the DC power supply includes a second control circuit and a second power circuit.

[0022] The DC power supply receives the first startup information and starts according to the first startup information, including: the second control circuit receives the first startup information, sends second startup information according to the first startup information, and the second startup information is used to instruct to start the second power circuit. The second power circuit starts when receiving the second startup information, receives the second DC voltage, and outputs the third DC voltage according to the second DC voltage.

[0023] In a possible implementation of the second aspect, the DC power supply includes a second control circuit and a second power circuit. The DC power supply receives the first shutdown information and shuts down according to the first shutdown information, including: the second control circuit receives the first shutdown information, sends second shutdown information according to the first shutdown information, and the second shutdown information is used to instruct to shut down the second power circuit. The second power circuit shuts down when receiving the second shutdown information.

[0024] According to a third aspect, a power supply system is provided, comprising a backup battery and a baseband unit according to the first aspect and various possible implementations of the first aspect, wherein an output end of the backup battery is coupled to an input end of a DC power supply of the baseband unit.

[0025] In a possible implementation of the third aspect, the system further includes a second AC power supply, an output end of the second AC power supply is coupled to an input end of the backup battery, the second AC power supply is used to receive an AC voltage, and output a fourth DC voltage according to the AC voltage, and the fourth DC voltage is used to charge the backup battery.

[0026] According to a fourth aspect, a base station is provided, comprising a radio remote unit and a power supply system according to the third aspect and various possible implementations of the third aspect.

[0027] It can be understood that any of the power supply methods, systems and base stations provided above are applied to the above baseband unit or cooperate with the baseband unit to achieve corresponding functions. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding baseband unit provided above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a base station provided in an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of a power supply system;

[0030] Figure 3 A schematic diagram of a baseband unit provided in an embodiment of the present application Figure 1 ;

[0031] Figure 4 A signal waveform diagram of a baseband unit provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of a baseband unit provided in an embodiment of the present application Figure 2 ;

[0033] Figure 6 A schematic diagram of a power supply method according to an embodiment of the present invention;

[0034] Figure 7 A schematic diagram of the structure of a power supply system provided in an embodiment of the present application;

[0035] Figure 8 A schematic diagram of the structure of a base station provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] In the embodiment of the present application, "at least one" refers to one or more, and "multiple" refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple. In addition, the embodiment of the present application uses words such as "first" and "second" to distinguish between the same items or similar items with basically the same functions and effects. For example, the first threshold and the second threshold are only to distinguish different thresholds, and do not limit their order. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order.

[0037] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0038] The technical solution of the embodiment of the present application can be applied to base stations and other electronic devices. Figure 1 A schematic diagram of a base station provided in an embodiment of the present application. The base station may be a distributed base station, which integrates baseband, main control, transmission, clock and other functions on the baseband unit BBU, integrates the radio frequency such as the transceiver and power amplifier on the remote radio unit (RRU), and the BBU and the RRU are coupled via optical fiber. The BBU side may be provided with a battery, an AC distribution box, a DC power supply cabinet, a digital distribution frame, a ground wire, a protective ground wire and other equipment to power the BBU.

[0039] In practical applications, a power supply system needs to be set up to convert alternating current (AC) provided by the mains power supply into direct current (DC) to power the BBU, so as to ensure the normal operation of the BBU. Figure 2 Schematic diagram of a power supply system. The power supply system 10 includes a second AC power supply 210, a backup battery 220, and a DC power supply 230 provided in a baseband unit. The output end of the mains power supply 100 is coupled to the input end of the second AC power supply 210, the input end of the backup battery 220 and the input end of the DC power supply 230 are both coupled to the output end of the second AC power supply 210, and the output end of the backup battery 220 is coupled to the input end of the DC power supply 230. The baseband unit also includes a load 300, and the output end of the DC power supply 230 is coupled to the load 300 via a bus.

[0040] The mains power output by the mains power supply 100 is high voltage AC power, such as 380V AC power. The second AC power supply 210 may be a power supply unit (PSU) for converting the received mains power into low voltage DC power V1 for output, and V1 may be 48V.

[0041] When the mains power supply 100 is supplying power normally, the DC power supply 230 in the baseband unit receives the DC power V1 output by the second AC power supply 210, converts the DC power V1 into DC power V2 and outputs it to the bus, where V2 may be 12 V. The load 300 in the baseband unit receives the DC power V2 output by the DC power supply 230 through the bus, and thus operates. The backup battery 220 receives the DC power V1 output by the second AC power supply 210 for charging.

[0042] When the mains power supply 100 is abnormal, the second AC power supply 210 cannot output DC power V1, and the backup battery 220 starts to output DC power V1. The DC power supply 230 receives the DC power V1 output by the backup battery 220, converts the DC power V1 into DC power V2 and outputs it to the bus, thereby supplying power to the load 300 in the baseband unit.

[0043] The power supply system 10 has the following problems: First, the entire link has many power conversion levels, and the power conversion loss is large. The second AC power supply 210 converts the mains power into DC power V1, which has some power conversion losses, and the DC power supply 230 converts DC power V1 into DC power V2, which has another part of power conversion losses. For example, the conversion efficiency of the second AC power supply 210 is 94%, and the conversion efficiency of the DC power supply 230 is 95%. Then, the comprehensive conversion efficiency of the mains power into DC power V2 is 94%*95%=89.3%, and the power conversion efficiency is low.

[0044] Second, the distribution chain is long and the distribution path loss is large. The transmission of the AC power output from the AC power supply to the second AC power supply 210, and the transmission of the DC power V1 output from the second AC power supply 210 to the DC power supply 230 must pass through a longer distribution path, such as a remote line, or a DC distribution unit (DCDU) and other distribution equipment. There is a part of the distribution path loss when the AC power output from the AC power supply is transmitted to the second AC power supply 210, and there is another part of the distribution path loss when the DC power V1 output from the second AC power supply 210 is transmitted to the DC power supply 230. For example, if the equivalent total resistance of the distribution path is 0.1 ohms and the current is 10 amps, the loss of the distribution path is 10 watts.

[0045] Based on this, an embodiment of the present application provides a baseband unit. Figure 3 A schematic diagram of a baseband unit provided in an embodiment of the present application Figure 1 The baseband unit 20 includes: a first AC power supply 240 , a DC power supply 230 and a load 300 . The output end of the first AC power supply 240 and the output end of the DC power supply 230 are coupled to the load 300 , and the input end of the DC power supply 230 is used to couple to the output end of the backup battery 220 .

[0046] The first AC power source 240 is used to receive an AC voltage and output a first DC voltage according to the AC voltage. The first DC voltage is used to power the load 300 .

[0047] The DC power supply 230 is used to receive the second DC voltage provided by the backup battery 220 when the first AC power supply 240 does not receive the AC voltage, and output the third DC voltage according to the second DC voltage, and the third DC voltage is used to power the load 300.

[0048] The input end of the first AC power supply 240 can be used to couple with the mains power supply 100, and the AC voltage can be the mains power (such as 380V AC) output by the mains power supply 100. The first AC power supply 240 can be a power supply that converts AC power into DC power. The DC power supply 230 can be a power supply that converts DC power of a certain voltage level into DC power of other voltage levels, such as a direct current (DCDC) converter. The DC power supply 230 can specifically be a step-down power supply.

[0049] When the mains power supply 100 is normal, the first AC power supply 240 can receive the AC voltage, and the baseband unit 20 supplies power to the load 300 through the first AC power supply 240. The backup battery 220 receives the second DC voltage converted from the mains power for charging. When the mains power supply 100 is abnormal, the first AC power supply 240 cannot receive the AC voltage, and the baseband unit 20 supplies power to the load 300 through the DC power supply 230.

[0050] Specifically, the first AC power source 240 and the DC power source 230 form a power supply circuit to supply power to the load 300 . Figure 4 A signal waveform diagram of a baseband unit provided in an embodiment of the present application. Exemplarily, when the baseband unit 20 is started, the DC power supply 230 can receive the second DC voltage output by the backup battery 220, and the first AC power supply can receive the AC voltage output by the mains power supply 100. The first AC power supply receives the AC voltage at time 0 and outputs the voltage at time T1, and the DC power supply 230 receives the second DC voltage at time 0 and outputs the third DC voltage 401. The first AC power supply 240 detects the third DC voltage 401 output by the DC power supply 230, and outputs a first DC voltage 402 slightly larger than the third DC voltage, so that the baseband unit 20 outputs a larger first DC voltage 402.

[0051] and Figure 2 Compared with the power supply system in, on the one hand, when the mains power supply 100 is normal, Figure 2 The power supply system in the embodiment converts the mains power (AC voltage) into a second DC voltage through the second AC power supply 210, and then converts the second DC voltage into a first DC voltage through the DC power supply 230, and the power conversion level of the entire link is 2. The baseband unit 20 provided in the embodiment of the present application converts the AC voltage into a first DC voltage through the first AC power supply 240, and the power conversion level of the entire link is 1. Therefore, the power conversion loss of the baseband unit 20 provided in the embodiment of the present application is small. For example, if the conversion efficiency of the first AC power supply 240 is 94%, then the comprehensive conversion efficiency of the AC voltage to the first DC voltage is 94%, which is 4.7% higher than 89.3%, and the power conversion efficiency is relatively high.

[0052] On the other hand, when the commercial power supply 100 is normal, Figure 2 In the power supply system, when the AC power (AC voltage) output by the AC power supply 100 is transmitted to the second AC power supply 210, there is a part of the distribution path loss S1. For example, if the equivalent total resistance of the distribution path is 0.1 ohms and the current is 10 amps, the loss of the distribution path is 10 watts. When the second DC voltage output by the second AC power supply is transmitted to the DC power supply 230, there is another part of the distribution path loss S2. In the baseband unit 20 provided in the embodiment of the present application, there is only a distribution path loss S1 in the process of transmitting the AC voltage to the first AC power supply 240, and there is no distribution path loss S2, and the distribution path loss is relatively small.

[0053] In the baseband unit 20 provided in the embodiment of the present application, the first AC power supply 240 is provided to receive the AC voltage and output the first DC voltage according to the AC voltage. The DC power supply 230 is also provided to receive the second DC voltage provided by the backup battery 220 when the first AC power supply 240 does not receive the AC voltage, and output the third DC voltage according to the second DC voltage. In this way, on the one hand, the AC voltage is converted into the first DC voltage by the first AC power supply 240, the power conversion level of the entire link is 1, and the power conversion efficiency is relatively high. On the other hand, there is only a distribution path loss in the process of transmitting the AC voltage to the first AC power supply 240, and the distribution path loss is relatively small.

[0054] In a possible implementation, the second output terminal of the first AC power supply 240 is coupled to the second input terminal of the DC power supply 230. The first AC power supply 240 is further configured to send first shutdown information when outputting the first DC voltage, and the first shutdown information is used to instruct to shut down the DC power supply 230. The DC power supply 230 is further configured to receive the first shutdown information and shut down according to the first shutdown information.

[0055] Among them, the DC power supply 230 receives the second DC voltage output by the backup battery 220 when the mains power supply 100 is normal, and does not output voltage after the T1 time period, but there is basic conversion power consumption. In the baseband unit 20 provided in the embodiment of the present application, the first AC power supply 240 sends the first shutdown information to shut down the DC power supply 230 when outputting the first DC voltage. In this way, the DC power supply 230 can stop receiving the second DC voltage of the backup battery 220, reducing the basic conversion power consumption of the DC power supply 230.

[0056] In a possible implementation manner, the first AC power source 240 is further configured to send first startup information when the AC voltage is not received, and the first startup information is configured to instruct to start the DC power source 230. Figure 4As shown, exemplarily, at time T2, the AC voltage 403 output by the mains power supply 100 is abnormal, the first AC power supply 240 cannot receive the AC voltage and cannot continuously output the first DC voltage, and the DC power supply 230 is turned off and cannot receive the second DC voltage and output the third DC voltage. At this time, the DC power supply 230 needs to be started to power the load 300.

[0057] In the baseband unit 20 provided in the embodiment of the present application, the first AC power supply 240 sends the first startup information when the AC voltage is not received, and the first startup information is used to instruct to start the DC power supply 230, so that the DC power supply 230 can receive the second DC voltage provided by the backup battery 220 when the mains power supply 100 is abnormal, and output the third DC voltage according to the second DC voltage. In this way, it can be avoided that the load 300 cannot be powered when the mains power is abnormal.

[0058] Figure 5 A schematic diagram of a baseband unit provided in an embodiment of the present application Figure 2 In a possible implementation, the first AC power source 240 further includes a first control circuit 241, a first power circuit 242, and a first detection circuit 243. An input end of the first detection circuit 243 is coupled to an output end of the DC power source 230, an output end of the first detection circuit 243 is coupled to an input end of the first control circuit 241, a first output end of the first control circuit 241 is coupled to a first input end of the first power circuit 242, a second input end of the first power circuit 242 is coupled to an input end of the first AC power source 240, an output end of the first power circuit 242 is coupled to an output end of the first AC power source 240, and an input end of the first AC power source 240 is used to receive the AC voltage.

[0059] The first detection circuit 243 is used to detect the third DC voltage and send detection information when the first AC power supply 240 receives the AC voltage. The detection information is used to indicate the third DC voltage. The first control circuit 241 is used to receive the detection information and send control information. The control information is used to indicate outputting the first DC voltage. The first DC voltage is determined according to the third DC voltage. The first power circuit 242 is used to receive the control information and output the first DC voltage according to the control information and the AC voltage.

[0060] Optionally, the output end of the mains power supply 100 is coupled to the input end of the second AC power supply, and the output end of the second AC power supply is coupled to the output end of the backup battery 220. The second AC power supply is used to receive the AC voltage provided by the mains power supply 100 when the mains power supply 100 is normal, and output a second DC voltage according to the AC voltage. The backup battery 220 is used to receive the second DC voltage for charging. In this way, a basis is provided for the backup battery 220 to output the second DC voltage to the DC power supply 230.

[0061] In the baseband unit 20 provided in the embodiment of the present application, the third DC voltage is detected by the first detection circuit 243, and the first control circuit 241 controls the first power circuit 242 to output the first DC voltage determined according to the third DC voltage, so that the baseband unit 20 outputs the first DC voltage to power the load 300. In this way, on the one hand, a basis is provided for improving the power conversion efficiency. On the other hand, a basis is provided for reducing the loss of the power distribution path.

[0062] In a possible implementation, the first DC voltage is greater than the third DC voltage. In the baseband unit 20 provided in the embodiment of the present application, the first AC power supply 240 and the DC power supply 230 form a combined power supply, and the first AC power supply 240 outputs a first DC voltage greater than the third DC voltage, so that the combined power supply outputs a larger first DC power supply. In this way, on the one hand, a basis is provided for improving power conversion efficiency. On the other hand, a basis is provided for reducing power distribution path loss.

[0063] In a possible implementation, Figure 5 As shown, the DC power supply 230 includes a second control circuit 231 and a second power circuit 232. The first input end of the DC power supply 230 is coupled to the first input end of the second power circuit 232. The second input end of the second power circuit 232 is coupled to the output end of the second control circuit 231. The output end of the second power circuit 232 is coupled to the output end of the DC power supply 230. The first input end of the DC power supply 230 is used to receive the second DC voltage. The second input end of the DC power supply 230 is coupled to the second input end of the second control circuit 231. The output end of the second control circuit 231 is coupled to the second input end of the second power circuit 232.

[0064] The second control circuit 231 is used to receive the first shutdown information, and send the second shutdown information according to the first shutdown information, wherein the second shutdown information is used to instruct to shut down the second power circuit 232. The second power circuit 232 is used to shut down when receiving the second shutdown information.

[0065] In the baseband unit 20 provided in the embodiment of the present application, the first AC power supply 240 communicates with the second control circuit 231, so that the second control circuit 231 controls the second power circuit 232 to be turned off, thereby turning off the DC power supply 230 when the mains power supply 100 is normal. In this way, the DC power supply 230 can stop receiving the second DC voltage of the backup battery 220, thereby reducing the basic conversion power consumption of the DC power supply 230.

[0066] In a possible implementation, Figure 5 As shown, the first AC power source 240 includes a second detection circuit 244, an input end of the second detection circuit 244 is coupled to an input end of the first AC power source 240, and an output end of the second detection circuit 244 is coupled to a second output end of the first AC power source 240. The second detection circuit 244 is configured to send the first startup information when the AC voltage is not detected.

[0067] In the baseband unit 20 provided in the embodiment of the present application, a second detection circuit 244 is provided to detect whether the mains power is abnormal, and the first startup information is sent through the second detection device when the mains power is abnormal (the AC voltage is not detected), so that the DC power supply 230 can receive the second DC voltage provided by the backup battery 220 when the mains power supply 100 is abnormal, and output the third DC voltage according to the second DC voltage. In this way, it can be avoided that the load 300 cannot be powered when the mains power is abnormal.

[0068] In a possible implementation, the second control circuit 231 is used to receive the first startup information, and send the second startup information according to the first startup information, wherein the second startup information is used to instruct to start the second power circuit 232. The second power circuit 232 is used to start upon receiving the second startup information, and receive the second DC voltage, and output the third DC voltage according to the second DC voltage. Figure 4 As shown, illustratively, at time T2 , the AC voltage 403 output by the mains power supply 100 is abnormal, and the second detection circuit 244 sends a startup message 404 .

[0069] In the baseband unit 20 provided in the embodiment of the present application, the second detection circuit 244 communicates with the second control circuit 231, so that the second control circuit 231 controls the second power circuit 232 to start, so that the second power circuit 232 receives the second DC voltage provided by the backup battery 220 when the mains power supply 100 is abnormal, and outputs the third DC voltage according to the second DC voltage. In this way, it can be avoided that the load 300 cannot be powered when the mains power supply is abnormal.

[0070] The present application also provides a power supply method. Figure 6A flow chart of a power supply method provided in an embodiment of the present application. The method is applied to a baseband unit, which may be the baseband unit 20 in the above-mentioned device embodiment, and the baseband unit 20 may include: a first AC power supply 240, a DC power supply 230 and a load 300, wherein the first output end of the first AC power supply 240 and the output end of the DC power supply 230 are coupled to the load 300, and the input end of the DC power supply 230 is used to couple with the backup battery 220. The method includes steps S110 and S120.

[0071] S110 : The first AC power source 240 receives an AC voltage, and outputs a first DC voltage according to the AC voltage, where the first DC voltage is used to power the load 300 .

[0072] S120: When the first AC power source 240 does not receive the AC voltage, the DC power source 230 receives the second DC voltage provided by the backup battery 220 and outputs the third DC voltage according to the second DC voltage, where the third DC voltage is used to power the load 300.

[0073] In a possible implementation, the method further includes: the first AC power supply 240 sends first shutdown information when outputting the first DC voltage, the first shutdown information being used to instruct to shut down the DC power supply 230. The DC power supply 230 receives the first shutdown information and shuts down according to the first shutdown information.

[0074] In a possible implementation, the method further includes: the first AC power supply 240 sends first startup information when the AC voltage is not received, the first startup information is used to instruct to start the DC power supply. The DC power supply 230 receives the first startup information and starts according to the first startup information.

[0075] In a possible implementation, the first AC power supply 240 further includes a first control circuit 241, a first power circuit 242, and a first detection circuit 243. The first AC power supply 240 receives an AC voltage and outputs a first DC voltage according to the AC voltage, including: when the first AC power supply 240 receives the AC voltage, the first detection circuit 243 detects the third DC voltage and sends detection information, where the detection information is used to indicate the third DC voltage. The first control circuit 241 receives the detection information and sends control information, where the control information is used to indicate outputting the first DC voltage, where the first DC voltage is determined according to the third DC voltage. The first power circuit 242 receives the control information and outputs the first DC voltage according to the control information and the AC voltage.

[0076] In a possible implementation, the first DC voltage is greater than the third DC voltage.

[0077] In a possible implementation manner, the DC power supply 230 includes a second control circuit 231 and a second power circuit 232. The DC power supply 230 receives the first shutdown information and shuts down according to the first shutdown information, including:

[0078] The second control circuit 231 receives the first shutdown information, and sends second shutdown information according to the first shutdown information, wherein the second shutdown information is used to instruct to shut down the second power circuit 232. The second power circuit 232 is shut down upon receiving the second shutdown information.

[0079] In a possible implementation, the first AC power source 240 further includes a second detection circuit 244. The first AC power source 240 sends the first startup information when the AC voltage is not received, including: the second detection circuit 244 sends the first startup information when the AC voltage is not detected.

[0080] In a possible implementation, the DC power supply 230 includes a second control circuit 231 and a second power circuit 232. The DC power supply 230 receives the first startup information and starts according to the first startup information, including: the second control circuit 231 receives the first startup information, sends second startup information according to the first startup information, and the second startup information is used to instruct to start the second power circuit 232. The second power circuit 232 starts when receiving the second startup information, receives the second DC voltage, and outputs the third DC voltage according to the second DC voltage.

[0081] The embodiment of the present application also provides a power supply system, Figure 7 The schematic diagram of the structure of a power supply system provided in an embodiment of the present application is as follows: The power supply system 40 may include the backup battery 220 and the baseband unit 20 in the above-mentioned device embodiment, and the input end of the backup battery 220 is coupled to the input end of the DC power supply 230 of the baseband unit 20.

[0082] In a possible implementation, the system further includes a second AC power source 210, the output end of the second AC power source 210 being coupled to the input end of the backup battery 220. The second AC power source 210 is used to receive an AC voltage and output a fourth DC voltage according to the AC voltage, and the fourth DC voltage is used to charge the backup battery 220. The fourth DC voltage may be equal to the second DC voltage or may not be equal to the second DC voltage.

[0083] The embodiment of the present application also provides a base station, Figure 8 A schematic diagram of the structure of a base station provided in an embodiment of the present application. The base station includes a radio remote unit 30 and a power supply system 40 in the above system embodiment.

[0084] Finally, it should be noted that the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A baseband unit, It is characterized in that The baseband unit comprises: a first AC power supply, a DC power supply and a load, wherein the first output end of the first AC power supply and the output end of the DC power supply are coupled to the load, and the first input end of the DC power supply is used to couple to the output end of the backup battery; The first AC power supply is used to receive an AC voltage and output a first DC voltage according to the AC voltage, wherein the first DC voltage is used to power the load; The DC power supply is used to receive a second DC voltage provided by the backup battery when the first AC power supply does not receive the AC voltage, and output a third DC voltage based on the second DC voltage, wherein the third DC voltage is used to power the load.

2. The baseband unit according to claim 1, It is characterized in that The first AC power supply is further used to send first shutdown information when outputting the first DC voltage, wherein the first shutdown information is used to instruct to shut down the DC power supply; The DC power supply is further configured to receive the first shutdown information and shut down according to the first shutdown information.

3. The baseband unit according to claim 1 or 2, It is characterized in that The first AC power supply is further used to send first startup information when the AC voltage is not received, and the first startup information is used to instruct to start the DC power supply; The DC power supply is further configured to receive the first startup information and start up according to the first startup information.

4. The baseband unit according to any one of claims 1 to 3, It is characterized in that The first AC power supply includes a first control circuit, a first power circuit and a first detection circuit; The first detection circuit is used to detect the third DC voltage and send detection information when the first AC power source receives the AC voltage, wherein the detection information is used to indicate the third DC voltage; The first control circuit is used to receive the detection information and send control information, wherein the control information is used to instruct to output the first DC voltage, and the first DC voltage is determined according to the third DC voltage; The first power circuit is used to receive the control information, and output the first DC voltage according to the control information and the AC voltage.

5. The baseband unit according to claim 4, It is characterized in that The first DC voltage is greater than the third DC voltage.

6. The baseband unit according to any one of claims 3 to 5, It is characterized in that The first AC power supply also includes a second detection circuit; The second detection circuit is used to send the first startup information when the AC voltage is not detected.

7. The baseband unit according to any one of claims 3 to 6, It is characterized in that The DC power supply includes a second control circuit and a second power circuit; The second control circuit is used to receive the first startup information, and send second startup information according to the first startup information, wherein the second startup information is used to instruct to start the second power circuit; The second power circuit is configured to start up upon receiving the second startup information, receive the second DC voltage, and output the third DC voltage according to the second DC voltage.

8. The baseband unit according to any one of claims 2 to 7, It is characterized in that The DC power supply includes a second control circuit and a second power circuit; The second control circuit is used to receive the first shutdown information, and send second shutdown information according to the first shutdown information, wherein the second shutdown information is used to instruct to shut down the second power circuit; The second power circuit is configured to be shut down upon receiving the second shut down information.

9. A method for supplying power, It is characterized in that The method is applied to a baseband unit, the baseband unit comprising: a first AC power supply, a DC power supply and a load, the first output end of the first AC power supply and the output end of the DC power supply are both coupled to the load, the first input end of the DC power supply is used to couple to the output end of the backup battery, the method comprising: The first AC power supply receives an AC voltage and outputs a first DC voltage according to the AC voltage, wherein the first DC voltage is used to power the load; When the first AC power supply does not receive the AC voltage, the DC power supply receives the second DC voltage provided by the backup battery, and outputs the third DC voltage according to the second DC voltage, wherein the third DC voltage is used to power the load.

10. The method according to claim 9, It is characterized in that The method further comprises: The first AC power source sends first shutdown information when outputting the first DC voltage, wherein the first shutdown information is used to instruct to shut down the DC power source; The DC power supply receives the first shutdown information and shuts down according to the first shutdown information.

11. The method according to claim 9 or 10, It is characterized in that The method further comprises: The first AC power source sends first startup information when not receiving the AC voltage, wherein the first startup information is used to instruct to start the DC power source; The DC power supply receives the first startup information and starts up according to the first startup information.

12. The method according to any one of claims 9 to 11, It is characterized in that The first AC power supply includes a first control circuit, a first power circuit and a first detection circuit; The first AC power source receives an AC voltage and outputs a first DC voltage according to the AC voltage, comprising: When the first AC power source receives the AC voltage, the first detection circuit detects the third DC voltage and sends detection information, where the detection information is used to indicate the third DC voltage; The first control circuit receives the detection information and sends control information, wherein the control information is used to instruct to output the first DC voltage, wherein the first DC voltage is determined according to the third DC voltage; The first power circuit receives the control information, and outputs the first DC voltage according to the control information and the AC voltage.

13. The method according to claim 12, It is characterized in that The first DC voltage is greater than the third DC voltage.

14. The method according to any one of claims 11 to 13, It is characterized in that The first AC power supply also includes a second detection circuit; The first AC power source sends first startup information when not receiving the AC voltage, including: The second detection circuit sends the first startup information when the AC voltage is not detected.

15. The method according to any one of claims 11 to 14, It is characterized in that The DC power supply includes a second control circuit and a second power circuit; The DC power supply receives the first startup information and starts according to the first startup information, including: The second control circuit receives the first startup information, and sends second startup information according to the first startup information, wherein the second startup information is used to instruct to start the second power circuit; The second power circuit starts up when receiving the second startup information, receives the second DC voltage, and outputs the third DC voltage according to the second DC voltage.

16. The method according to any one of claims 10 to 15, It is characterized in that The DC power supply includes a second control circuit and a second power circuit; The direct current power supply receives the first shutdown information and shuts down according to the first shutdown information, including: The second control circuit receives the first shutdown information, and sends second shutdown information according to the first shutdown information, wherein the second shutdown information is used to instruct to shut down the second power circuit; The second power circuit is turned off upon receiving the second turn-off information.

17. A power supply system, It is characterized in that The system comprises a backup battery and a baseband unit according to any one of claims 1 to 8, wherein an output terminal of the backup battery is coupled to an input terminal of a direct current power supply of the baseband unit.

18. The system according to claim 17, It is characterized in that The system further comprises a second AC power source, an output end of the second AC power source being coupled to an input end of the backup battery; The second AC power supply is used to receive an AC voltage and output a fourth DC voltage according to the AC voltage, and the fourth DC voltage is used to charge the backup battery.

19. A base station, It is characterized in that The base station comprises a radio remote unit and a power supply system as claimed in claim 17 or 18.

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