Portable power supply

Abstract

The utility model relates to the technical field of circuit control, and provides a portable power supply, which comprises a storage battery, an AC / DC rectifier, a DC / AC inverter, a switching power supply, a voltage stabilizing circuit, a first static switch and a second static switch, the input end of the AC / DC rectifier is connected with the AC input end, the output end of the AC / DC rectifier is connected with the input end of the DC / AC inverter, the input end of the DC / AC inverter is connected with one end of the first static switch, and the other end of the first static switch is connected with the AC output end; the input end of the switching power supply is connected with the AC input end; the output end of the switching power supply is connected with the storage battery; the first output of the storage battery is connected with one end of the second static switch, the other end of the second static switch is connected with the direct current output end, and the second output of the storage battery is connected with the input end of the DC / AC inverter through the voltage stabilizing circuit. According to the utility model, through the above circuit structure, alternating current and direct current can be output at the same time, and a portable power supply suitable for a base station is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit control, in particular to a portable power supply. Background Art

[0002] With the development of communication technology, telecom operators are deploying more and more base stations, with wider coverage. Base stations typically operate from a 220V mains supply. However, in some areas or at certain times, the mains voltage may be unstable or even outage, causing base stations to malfunction and communication interruptions.

[0003] Currently, one approach to powering base stations in the event of unstable utility voltage or power outages is to use diesel generators. However, these generators are bulky, difficult to transport, and expensive to operate. Another approach is to use portable power supplies powered by batteries. However, base stations vary in type and size, and some equipment in base stations uses DC power while others uses AC power. Most portable power supplies only have DC output, which cannot meet the needs of base stations. Therefore, developing a portable power supply suitable for base stations is an urgent technical challenge. Utility Model Content

[0004] The utility model provides a portable power supply to solve the above technical problems existing in the prior art.

[0005] The utility model provides a portable power supply, which comprises a battery, an AC / DC rectifier, a DC / AC inverter, a switching power supply, a voltage stabilizing circuit, a first static switch and a second static switch.

[0006] The input end of the AC / DC rectifier is connected to the AC input end, the output end of the AC / DC rectifier is connected to the input end of the DC / AC inverter, the input end of the DC / AC inverter is connected to one end of the first static switch, and the other end of the first static switch is connected to the AC output end.

[0007] The input end of the switching power supply is connected to the AC input end, and the output end of the switching power supply is connected to the battery.

[0008] The first output of the battery is connected to one end of the second static switch, the other end of the second static switch is connected to the DC output end, and the second output of the battery is connected to the input end of the DC / AC inverter through the voltage stabilizing circuit.

[0009] According to a portable power supply provided by the present invention, the voltage stabilizing circuit includes: a DC / DC converter, the second output of the battery is connected to the input end of the DC / DC converter, and the output end of the DC / DC converter is connected to the input end of the DC / AC inverter.

[0010] According to a portable power supply provided by the present invention, the voltage stabilizing circuit further includes: a PNP-type transistor, wherein the base of the PNP-type transistor is connected to the output end of the AC / DC rectifier, the emitter is connected to the second output of the battery, and the collector is connected to the input end of the DC / DC converter.

[0011] According to a portable power supply provided by the present invention, the voltage stabilizing circuit further includes: a diode, wherein the anode of the diode is connected to the output end of the DC / DC converter, and the cathode of the diode is connected to the input end of the DC / AC inverter.

[0012] According to the portable power supply provided by the present invention, it also includes: a voltage sensor, which is connected to the line from the AC input end to the AC / DC rectifier.

[0013] According to the utility model, a portable power supply further includes: an indicator light, which is connected to the voltage sensor. When the voltage monitored by the voltage sensor is within the normal voltage range of the mains power, the indicator light is driven to light up.

[0014] According to the utility model, a portable power supply further includes: a first filter, wherein the input end of the first filter is connected to the AC input end, and the output end of the first filter is connected to the input end of the AC / DC rectifier.

[0015] According to the utility model, a portable power supply further includes: a second filter, wherein the input end of the second filter is connected to the other end of the first static switch, and the output end of the second filter is connected to the AC output end.

[0016] According to a portable power source provided by the utility model, the storage battery is a lithium iron phosphate battery pack.

[0017] According to the utility model, a portable power supply is provided, which also includes: a box body, the battery, AC / DC rectifier, DC / AC inverter, switching power supply and voltage stabilization circuit are located in the box body, the contacts of the first static switch and the second static switch are respectively located in the box body, and the operation buttons of the first static switch and the second static switch are respectively set on the surface of the box body; the bottom of the box body is also provided with a roller, and the side of the box body is also provided with a pull rod.

[0018] The portable power supply provided by the utility model includes: a battery, an AC / DC rectifier, a DC / AC inverter, a switching power supply, a voltage stabilizing circuit, a first static switch and a second static switch. When the mains power is cut off, the battery can power the DC equipment in the base station through the second static switch, and power the AC equipment in the base station through the voltage stabilizing circuit, the DC / AC inverter and the first static switch; when the mains voltage is unstable, the AC power of the mains can be converted into stable DC power through the AC / DC rectifier, and then power the AC equipment in the base station through the DC / AC inverter and the first static switch. Moreover, the AC power of the mains can be charged by the battery after being stabilized by the switching power supply, and the battery can still power the DC equipment in the base station through the second static switch, thereby realizing a portable power supply suitable for the base station, which can power both AC and DC equipment in the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is one of the structural diagrams of the portable power supply provided by the utility model.

[0021] Figure 2 This is a schematic diagram of power supply of the portable power supply provided by the utility model in the event of a city power outage.

[0022] Figure 3 This is a schematic diagram of power supply of the portable power supply provided by the utility model when the mains voltage is unstable.

[0023] Figure 4 This is the second structural diagram of the portable power supply provided by the utility model.

[0024] The figure numbers are as follows: 1: battery; 2: AC / DC rectifier; 3: DC / AC inverter; 4: switching power supply; 5: first static switch; 6: second static switch; 7: DC / DC converter; 8: PNP transistor; 9: diode; 10: voltage sensor; 11: indicator light; 12: first filter; 13: second filter. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In order to solve the technical problems existing in the prior art, this embodiment provides a portable power supply, which is particularly suitable for powering base stations, but is not limited to powering base stations. The structure of the portable power supply of this embodiment is as follows: Figure 1 As shown, it includes: a battery 1, an AC / DC rectifier 2, a DC / AC inverter 3, a switching power supply 4, a voltage stabilizing circuit, a first static switch 5 and a second static switch 6.

[0027] The input end of the AC / DC rectifier 2 is connected to the AC input end, the output end of the AC / DC rectifier 2 is connected to the input end of the DC / AC inverter 3, the input end of the DC / AC inverter 3 is connected to one end of the first static switch 5, and the other end of the first static switch 5 is connected to the AC output end.

[0028] Specifically, the AC input end of the portable power supply is used to connect to the mains (for example: 220V), the AC / DC rectifier 2 is used to convert the AC power of the mains into DC power and stabilize the converted DC voltage, the DC / AC inverter 3 is used to convert the DC power with stable voltage into AC power with stable voltage, and the first static switch 5 is used to control the output of the AC power with stable voltage to the AC output end, thereby powering the AC equipment in the base station.

[0029] The input end of the switching power supply 4 is connected to the AC input end, and the output end of the switching power supply 4 is connected to the battery 1, which is used to convert the AC power of the mains into DC power to charge the battery 1 when the portable power supply is connected to the mains and the mains is not cut off.

[0030] The first output of battery 1 is connected to one end of a second static switch 6, the other end of which is connected to the DC output terminal. The second output of battery 1 is connected to the input terminal of DC / AC inverter 3 via a voltage stabilizing circuit. Specifically, second static switch 6 is used to control the DC power output of the first output of battery 1 to the DC output terminal. The voltage stabilizing circuit is used to stabilize the DC voltage of the second output of battery 1, preventing unstable discharge voltage due to power loss during battery 1's sole power supply. Ultimately, this ensures a more stable AC voltage after conversion by DC / AC inverter 3.

[0031] In this embodiment, the first static switch 5 and the second static switch 6 are both manually controlled switches. When a portable power source is needed to power the base station, the corresponding switches can be closed.

[0032] The working principle of the portable power supply of this embodiment is as follows.

[0033] To ensure normal operation of the base station in the event of a mains power outage or unstable voltage, the output terminal of the portable power supply of this embodiment is connected to the backup input terminal of the base station. A base station typically includes a main input terminal and a backup input terminal. The main input terminal is typically connected to the mains power supply. To facilitate inspection and maintenance, the backup input terminal is divided into an AC input terminal and / or a DC input terminal. Depending on the type and size of the base station, if the base station only has AC or DC equipment, then the backup input terminal will only have an AC input terminal or a DC input terminal. If the base station includes both AC and DC equipment, then the backup input terminal will also include an AC input terminal and a DC input terminal. In actual applications, the AC output terminal and / or DC output terminal of the portable power supply are connected to the AC input terminal and / or DC input terminal of the base station backup input terminal, respectively, according to actual conditions.

[0034] like Figure 2 As shown, in the event of a utility power outage, battery 1 can power the DC devices in the base station via the second static switch 6. This is done by connecting the DC output of the portable power supply to the DC input of the base station's backup input, and then closing the second static switch 6. For AC devices in the base station, the AC output of the portable power supply is connected to the AC input of the base station's backup input, and the first static switch 5 is closed. The DC power output by battery 1 is then converted to AC power via the voltage stabilization circuit and DC / AC inverter, and then passes through the first static switch 5 to power the AC devices in the base station.

[0035] When the mains voltage is unstable, the AC power of the mains can be converted into stable DC power by the AC / DC rectifier 2, and then power the AC equipment in the base station through the DC / AC inverter and the first static switch 5. In addition, the AC power of the mains can be stabilized by the switching power supply 4 and then charged by the battery 1. The battery 1 powers the DC equipment in the base station through the second static switch 6.

[0036] After the mains voltage returns to stability, the mains power supplies power to the equipment in the base station through the main input terminal of the base station. At this time, the first static switch 5 and the second static switch 6 can be disconnected first, and then the AC output terminal and / or DC output terminal of the portable power supply can be disconnected from the backup input terminal of the base station.

[0037] It should be noted that: Figure 2 and Figure 3In the figure, the solid arrows indicate the direction of direct current flow, and the dotted arrows indicate the direction of alternating current flow. In the event of a mains power outage or voltage instability, the AC input terminal of the portable power supply of this embodiment is connected to the mains power supply, which facilitates charging of the battery 1 when the mains voltage is unstable or recovers from a power outage.

[0038] The portable power supply of this embodiment is implemented as a portable power supply suitable for base stations through the above circuit structure. It can output AC and DC simultaneously and power AC and DC devices in the base station when the mains power is cut off or the voltage is unstable.

[0039] In some embodiments, the voltage stabilization circuit includes a DC / DC converter 7. The second output of battery 1 is connected to the input of DC / DC converter 7, and the output of DC / DC converter 7 is connected to the input of DC / AC inverter 3. DC / DC converter 7 is used to convert the DC power from the second output of battery 1 to DC power to stabilize the discharge voltage output of battery 1.

[0040] In some embodiments, the voltage stabilization circuit further includes a PNP transistor 8, wherein the base of the PNP transistor 8 is connected to the output of the AC / DC rectifier 2, the emitter is connected to the second output of the battery 1, and the collector is connected to the input of the DC / DC converter 7. Specifically, the second output of the battery 1 is connected to the input of the DC / DC converter 7 via the PNP transistor 8. The base of the PNP transistor 8 is conductive when at a low level. During a mains power outage, the AC / DC rectifier 2 has no output, which is equivalent to the base being at a low level, causing the PNP transistor 8 to be conductive. The DC current from the second output of the battery 1 passes through the PNP transistor 8 to the DC / DC converter 7. The DC / DC converter 7 performs DC / DC conversion on the DC current, stabilizes the voltage, and outputs the DC current to the DC / AC inverter 3. The DC / AC inverter 3 converts the DC current into AC current, converting the DC current into AC current, and outputs the AC current to the AC output terminal via the first static switch 5. This enables the battery 1 to power the AC equipment in the base station. When the mains power is unstable or the mains power is restored after a power outage, the AC / DC rectifier 2 has an output voltage, the base of the PNP transistor 8 is at a high level, the PNP transistor 8 is cut off, and the battery 1 no longer supplies power to the AC equipment in the base station. Especially when the mains power is unstable, the mains power only needs to pass through the AC / DC rectifier 2, the DC / AC inverter 3 and the first static switch 5 to supply power to the AC equipment in the base station, thereby avoiding the battery 1 repeatedly supplying power to the AC equipment in the base station and wasting energy.

[0041] In some embodiments, the voltage stabilization circuit further includes a diode 9, wherein the anode of diode 9 is connected to the output of DC / DC converter 7, and the cathode of diode 9 is connected to the input of DC / AC inverter 3. That is, DC / DC converter 7 is connected to DC / AC inverter 3 via diode 9. Diode 9 has a unidirectional conduction characteristic. When the mains power is unstable or after a power outage, it prevents the current output by AC / DC rectifier 2 from flowing into DC / DC converter 7, thereby causing an impact or even damaging DC / DC converter 7.

[0042] In some embodiments, the portable power supply further includes a voltage sensor 10 connected to the line from the AC input to the AC / DC rectifier. Voltage sensor 10 is used to monitor the mains voltage in real time and display the real-time voltage on a display screen of voltage sensor 10, allowing personnel to check whether the mains power is functioning properly. If the mains power is functioning properly, the portable power supply can be disconnected from the base station to prevent further discharge of battery 1, thereby minimizing the operating time of battery 1 and extending its service life.

[0043] In some embodiments, the portable power supply further includes: an indicator light 11, the indicator light 11 is connected to a voltage sensor 10, and the voltage sensor 10 is used to drive the indicator light 11 to light up when the monitored voltage is within the normal voltage range of the mains (for example, 220V±220V·3%). When the mains power is unstable, the AC voltage of the mains will be lower or higher than the normal voltage range. At this time, the indicator light 11 will not light up, or even jump between the normal range and the abnormal range. At this time, the indicator light 11 will flash unstably. Since the AC input end of the portable power supply is also connected to the mains in actual use, the staff can quickly and intuitively judge whether the mains power has returned to normal by the status of the indicator light 11. If the indicator light 11 remains stably lit for a period of time (set according to actual conditions), it means that the mains power has returned to normal, and the portable power supply can be disconnected from the base station in time to prevent the battery 1 from continuing to discharge, and to shorten the use time of the battery 1 as much as possible to extend its service life.

[0044] like Figure 4 As shown, in some embodiments, the portable power supply further includes: a first filter 12, wherein the input end of the first filter 12 is connected to the AC input end, and the output end of the first filter 12 is connected to the input end of the AC / DC rectifier 2. The first filter 12 is used to filter out burrs or noise in the AC power output by the mains, especially when the mains voltage is unstable, so that the voltage of the AC power ultimately input to the AC / DC rectifier 2 is more stable.

[0045] like Figure 4As shown, in some embodiments, the portable power supply further includes a second filter 13, wherein the input end of the second filter 13 is connected to the other end of the first static switch 5, and the output end of the second filter 13 is connected to the AC output end. The second filter 13 is used to filter out glitches or noise in the AC power output by the DC / AC inverter 3, thereby making the voltage of the AC power ultimately output to the base station more stable.

[0046] In some embodiments, battery 1 is a lithium iron phosphate battery pack. Lithium iron phosphate batteries are compact, lightweight, and have a long cycle life. With the same capacity, they are one-third the volume and one-quarter the weight of lead-acid batteries, with a lifespan two to three times that of lead-acid batteries. Furthermore, they are more affordable than ternary lithium batteries, making them the optimal choice for powering base stations.

[0047] In some embodiments, the portable power supply further comprises a housing, wherein the battery 1, AC / DC rectifier 2, DC / AC inverter 3, switching power supply 4, and voltage stabilization circuit are located within the housing. The contacts of the first and second static switches 5 and 6 are located within the housing, and the operating buttons of the first and second static switches 5 and 6 are located on the surface of the housing for easy operation. In this embodiment, the housing is also provided with rollers at the bottom and pull rods on the sides, forming a structure similar to a trolley case, which is convenient for transportation and enhances portability. Compared to a diesel generator, the portable power supply of this embodiment is lighter, smaller, more portable, and has a lower cost.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A portable power supply, characterized in that: include: A battery, an AC / DC rectifier, a DC / AC inverter, a switching power supply, a voltage stabilizing circuit, a first static switch, and a second static switch; The input end of the AC / DC rectifier is connected to the AC input end, the output end of the AC / DC rectifier is connected to the input end of the DC / AC inverter, the input end of the DC / AC inverter is connected to one end of the first static switch, and the other end of the first static switch is connected to the AC output end; The input end of the switching power supply is connected to the AC input end, and the output end of the switching power supply is connected to the battery; The first output of the battery is connected to one end of the second static switch, the other end of the second static switch is connected to the DC output end, and the second output of the battery is connected to the input end of the DC / AC inverter through the voltage stabilizing circuit.

2. The portable power supply according to claim 1, wherein: The voltage stabilizing circuit includes a DC / DC converter, the second output of the battery is connected to the input end of the DC / DC converter, and the output end of the DC / DC converter is connected to the input end of the DC / AC inverter.

3. The portable power supply according to claim 2, wherein: The voltage stabilizing circuit further includes: a PNP transistor, wherein the base of the PNP transistor is connected to the output end of the AC / DC rectifier, the emitter is connected to the second output of the battery, and the collector is connected to the input end of the DC / DC converter.

4. The portable power supply according to claim 2, wherein: The voltage stabilizing circuit further includes: a diode, wherein an anode of the diode is connected to the output end of the DC / DC converter, and a cathode of the diode is connected to the input end of the DC / AC inverter.

5. The portable power supply according to claim 1, wherein: Also includes: A voltage sensor is connected to a line from the AC input end to the AC / DC rectifier.

6. The portable power supply according to claim 5, characterized in that Also includes: The indicator light is connected to the voltage sensor, and when the voltage monitored by the voltage sensor is within the normal voltage range of the mains, the indicator light is driven to light up.

7. The portable power supply according to claim 1, wherein: Also includes: A first filter, wherein an input end of the first filter is connected to the AC input end, and an output end of the first filter is connected to the input end of the AC / DC rectifier.

8. The portable power supply according to claim 1, wherein: Also includes: A second filter, wherein an input end of the second filter is connected to the other end of the first static switch, and an output end of the second filter is connected to the AC output end.

9. The portable power supply according to claim 1, wherein: The battery is a lithium iron phosphate battery pack.

10. The portable power supply according to any one of claims 1 to 9, characterized in that: Also includes: The battery, AC / DC rectifier, DC / AC inverter, switching power supply and voltage stabilizing circuit are located in the box, the contacts of the first static switch and the second static switch are respectively located in the box, and the operation buttons of the first static switch and the second static switch are respectively set on the surface of the box; the bottom of the box is also provided with a roller, and the side of the box is also provided with a pull rod.

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