TWM642975U - Uninterruptible power supply system - Google Patents

Abstract

An uninterruptible power supply (UPS) system includes a first voltage converter, a second voltage converter, a third voltage converter, a first switch, a second switch, a battery module, a charging module, a third switch and a controller. The first voltage converter is electrically connected to the load. The second voltage converter is electrically connected to the first voltage converter. The third voltage converter is electrically connected to the first voltage converter. The first switch is electrically connected to the load and an AC power supply. The second switch is electrically connected to the second voltage converter and the AC power supply. The battery module is electrically connected to the third voltage converter. The charging module is electrically connected to the battery module. The third switch is electrically connected to the charging module and the AC power supply. The controller is used for switching statuses of the first switch, the second switch and the third switch according to an ambient temperature and at least one temperature threshold.

Description

UPS

The present disclosure relates to an uninterruptible power supply system, and more particularly to an uninterruptible power supply system capable of operating in extreme weather and supplying power to loads.

Uninterruptible power supply (uninterruptible power supply, UPS) system is a kind of energy storage equipment, which is widely used in various fields that require highly stable power supply. It provides emergency backup power for the load side in case of abnormality of the power supply side or power grid, so as to maintain The load-side equipment is operating normally. However, the application of renewable energy covers all parts of the world, making the UPS system face temperature differences in various extreme climates, resulting in abnormal operation of the UPS system due to temperature factors. In addition, extreme ambient temperature may also cause battery failure, and even affect insulation, resulting in hazards to personnel.

Therefore, the purpose of the present disclosure is to provide an uninterruptible power supply system suitable for providing power to loads, which can operate under extreme ambient temperature and the battery used in the system can not be damaged under the extreme environment.

According to the above purpose, the present invention proposes an uninterruptible power supply system, which includes a first voltage converter, a second voltage converter, a third voltage converter, a first switch, a second switch, a battery module, a charging module, Third switch and controller. The first voltage converter is coupled to the load, the second voltage converter is coupled to the first voltage converter, the third voltage converter is coupled to the first voltage converter, the first switch is coupled to the load and the AC power supply terminal, and the second switch The second voltage converter is coupled to the AC power supply terminal, the battery module is coupled to the third voltage converter, the charging module is coupled to the battery module, the third switch is coupled to the charging module and the AC power supply terminal, and the controller Coupled with the first switch, the second switch and the third switch, the controller is used for switching the states of the first switch, the second switch and the third switch according to the ambient temperature and at least one temperature threshold.

According to an embodiment of the disclosure, wherein the controller turns on the first switch and turns off the second switch and the first Three switches.

According to an embodiment of the present disclosure, the controller turns on the second switch and turns off the first switch and the third switch when the ambient temperature is greater than the second temperature threshold and less than a third temperature threshold of the at least one temperature threshold.

According to an embodiment of the present disclosure, the controller monitors the state of the battery module when the ambient temperature is greater than the third temperature threshold, and turns on when the cumulative time of the ambient temperature is greater than the fourth temperature threshold of at least one temperature threshold reaches the time threshold. third switch.

According to an embodiment of the present disclosure, the controller turns off the third switch when the power of the battery module is saturated.

According to an embodiment of the present disclosure, the above-mentioned uninterruptible power supply system further includes: a communication module coupled to the controller, and the communication module is configured to transmit ambient temperature and charging information of the battery module to the monitoring interface.

According to an embodiment of the present disclosure, the above-mentioned uninterruptible power supply system further includes: a temperature sensor coupled to the controller, and the temperature sensor is configured to sense ambient temperature.

According to an embodiment of the present disclosure, the first voltage converter and the second voltage converter are respectively a DC-AC voltage converter and an AC-DC voltage converter.

According to an embodiment of the present disclosure, the first voltage converter and the third voltage converter are respectively a DC-AC voltage converter and a DC-DC voltage converter.

According to an embodiment of the present disclosure, the battery module includes a lead-acid battery.

Embodiments of the present invention are discussed in detail below. It should be appreciated, however, that the embodiments provide many applicable concepts that can be implemented in a wide variety of specific contexts. The discussed and disclosed embodiments are for illustration only, and are not intended to limit the scope of the present invention.

The terms used herein are only used to describe specific embodiments, and are not intended to limit the scope of patent applications. Unless otherwise limited, the terms "a" or "the" in the singular may also be used in the plural.

Please refer to FIG. 1 , which is a schematic configuration diagram of an uninterruptible power supply system 100 according to the present invention. The uninterruptible power supply system 100 is suitable for providing stable power to the load 600, which includes a first voltage converter 110, a second voltage converter 120, a third voltage converter 130, a first switch 140A, a second switch 140B, a second Three switches 140C, a battery module 150 , a charging module 160 and a controller 170 .

The first voltage converter 110 is coupled to the load 600 , and both the second voltage converter 120 and the third voltage converter 130 are coupled to the first voltage converter 110 . The first switch 140A is coupled to the load 600 and the AC power supply terminal 500 , and the second switch 140B is coupled to the second voltage converter 120 and the AC power supply terminal 500 . The battery module 150 is coupled to the third voltage converter 130 , and the charging module 160 is coupled to the battery module 150 . The third switch 140C is coupled to the charging module 160 and the AC power supply terminal 500 . Switch states of the first switch 140A, the second switch 140B and the third switch 140C determine the working mode of the uninterruptible power supply system 100 . The uninterruptible power supply system 100 can further include a fourth switch 140D, which can be turned on when the power supply of the AC power supply terminal 500 is normal, and can be turned off when the power supply of the AC power supply terminal 500 is abnormal. In an embodiment of the present invention, the first voltage converter 110 is a DC-AC voltage converter, the second voltage converter 120 is an AC-DC voltage converter, and the third voltage converter 130 is a DC-DC voltage converter . The battery module 150 may be a lead-acid battery, a supercapacitor, a lithium-ion battery, a lithium-iron battery or other suitable rechargeable batteries.

The controller 170 is coupled to the first switch 140A, the second switch 140B and the third switch 140C for switching the states of the first switch 140A, the second switch 140B and the third switch 140C. Specifically, the controller 170 is coupled to the control terminal of each switch of the first switch 140A, the second switch 140B and the third switch 140C, and provides The control signal is used to control the states of the first switch 140A, the second switch 140B and the third switch 140C to be on or off. In addition, the controller 170 can also monitor the system status of the uninterruptible power supply system 100 , the ambient temperature, and the charging information of the battery module 150 . The system state of the UPS 100 may include but not limited to circuit parameters such as input power, output power, output voltage, and output current of the UPS 100, and the charging information of the battery module 150 may include but not limited to remaining Battery power, charging waiting time, whether it is in a chargeable state, and battery temperature and other related information.

In some embodiments, the uninterruptible power supply system 100 further includes a communication module 180, which is coupled to the controller 170 and configured to transmit the system status of the uninterruptible power supply system 100, the ambient temperature and the charging information of the battery module 150 through It is transmitted to the monitoring interface 182 by wired or wireless communication. The communication module 180 can be a wired communication module or a wireless communication module, such as but not limited to Bluetooth, Wi-Fi, Ethernet, ZigBee, USB, RS232, Modbus or CANbus communication modules.

In addition, the monitoring interface 182 can also be any terminal device that can be operated by the user, such as but not limited to a notebook computer, a tablet computer, or a smart phone.

In some embodiments, the uninterruptible power supply system 100 further includes a temperature sensor 190 coupled to the controller 170 and configured to sense ambient temperature. In some embodiments of the present invention, the temperature sensor 190 is also used to sense the battery temperature of the battery module 150 .

FIG. 2 is a schematic flow diagram of the uninterruptible power supply system 100 in an embodiment of the present invention supplying power to a load 600 in an extreme weather field. 3A, 3B and 3C illustrate that the uninterruptible power supply system 100 respectively turns on the first switch 140A, the second switch 140B and the third switch 140C according to the ambient temperature and the temperature threshold to enter three working modes, including: online mode ( on-line mode), bypass mode (bypass mode) and battery charging mode, etc. The embodiment of the present invention adopts three temperature thresholds T ₁ -T ₃ , which are respectively set as minus 40 degrees Celsius, minus 25 degrees Celsius and 0 degrees Celsius. It should be understood that although only three temperature thresholds are set in the example, more or fewer temperature thresholds may be set according to usage requirements in practice. In some embodiments, the temperature setting of the temperature threshold can be adjusted according to the type of the battery module 150 .

First, in step 310, the AC power supply terminal 500 coupled to the uninterruptible power supply system 100 resumes normal power supply when the ambient temperature is greater than the temperature threshold T ₁ (for example, minus 40 degrees Celsius), and at this time the battery module 150 is in a waiting state. Specifically, when the AC power supply terminal 500 is powered off, the uninterruptible power supply system 100 will use the battery module 150 to supply power to the load 600 until the power is cut off when the battery module 150 is exhausted or reaches the minimum power set point; Until the AC power supply terminal 500 resumes power supply, the uninterruptible power supply system 100 uses the power provided by the AC power supply terminal 500 to supply power to the load 600 when the ambient temperature is greater than the temperature threshold _T1 .

In step 320, the uninterruptible power supply system 100 can automatically start (auto-start) and enter the bypass mode under the temperature threshold T1 (minus 40 degrees Celsius), and at the same time restore the communication function of the communication module 180, so that the user can The system status of the uninterruptible power supply system 100 , the ambient temperature and the charging information of the battery module 150 can be obtained in real time through the monitoring interface 182 . As shown in FIG _. 3A , the controller 170 turns on the first switch 140A and turns off the _second switch 140B and the Three switches 140C. At this time, the UPS 100 enters the bypass mode and the AC power supply terminal 500 directly supplies power to the load 600 .

In step 330 , when the ambient temperature rises to the point where the ambient temperature is greater than the temperature threshold T ₂ (minus 25 degrees Celsius) and lower than the temperature threshold T ₃ (0 degrees Celsius) among the temperature thresholds, the uninterruptible power supply system 100 enters the online mode. As shown in Figure 3B, the controller 170 turns on the _{second switch} 140B and turns off the first switch 140A and the third Switch 140C. At this time, the uninterruptible power supply system 100 enters the online mode, and the AC power supply terminal 500 supplies power to the load 600 via the second voltage converter 120 and the first voltage converter 110 .

In step 340, when the ambient temperature is greater than the temperature threshold _T3 (0 degrees Celsius), the uninterruptible power supply system 100 maintains the online mode operation and automatically monitors the state of the battery module 150 to determine whether the charging of the battery module 150 is reached condition. Specifically, the temperature sensor 190 senses the ambient temperature, and cooperates with the timer of the controller 170 to calculate the cumulative time when the ambient temperature reaches the temperature threshold _T4 . When the temperature sensor 190 senses that the ambient temperature is greater than the temperature When the accumulated time of the threshold _T4 reaches the time threshold, the third switch 140C is turned on. In one embodiment of the present invention, the fourth temperature threshold is set to 5 degrees Celsius, and the time threshold is set to 30 minutes, so when the temperature sensor 190 senses that the ambient temperature is greater than 5 degrees Celsius and the cumulative time reaches 30 minutes, the control The switch 170 turns on the third switch 140C to use the charging module 160 to charge the battery module 150 . In one embodiment of the present invention, the temperature threshold _T4 is set to 10 degrees Celsius, and the time threshold is set to 20 minutes, so when the temperature sensor 190 senses that the ambient temperature is greater than 10 degrees Celsius and the cumulative time reaches 20 minutes, the control The switch 170 turns on the third switch 140C to use the charging module 160 to charge the battery module 150 . In one embodiment of the present invention, the temperature threshold _T4 is set to 15 degrees Celsius, and the time threshold is set to 10 minutes, so when the temperature sensor 190 senses that the ambient temperature is greater than 15 degrees Celsius and the cumulative time reaches 10 minutes, the control The switch 170 turns on the third switch 140C to use the charging module 160 to charge the battery module 150 . It should be understood that the values of the temperature threshold T ₄ and the time threshold can be changed and set according to the needs of users. For example, it can be set to use the combination of three temperature thresholds and time thresholds as the judgment criteria for entering the battery charging mode, which are the combination of 5 degrees Celsius and 30 minutes, the combination of 10 degrees Celsius and 20 minutes, and the combination of 15 degrees Celsius. degree and 10 minutes, and as long as the sensing result of the temperature sensor 190 reaches any standard, the uninterruptible power supply system 100 enters into the battery charging mode to start charging the battery module 150 .

In step 350, the uninterruptible power supply system 100 meets the charging condition of step 340 and enters the battery charging mode. As shown in FIG. 3C , when the controller 170 turns on the third switch 140C, the charging module 160 starts to charge the battery module 150 . At this moment, the UPS 100 still turns on the second switch 140B to maintain the online mode operation. The controller 170 can turn off the third switch 140C to leave the battery charging mode when, for example, the power of the battery module 150 is saturated or the battery module 150 does not need to be charged any more. The online mode operation can be maintained to supply power to the load 600 .

According to the new type of uninterruptible power supply system, it is suitable for providing stable power to the load. It can turn on different switches according to the ambient temperature and temperature threshold to enter different working modes, and can automatically start and restore communication in low temperature environment Function to provide users with real-time information on the system status of the uninterruptible power supply system, ambient temperature and battery module charging information, and also has the function of automatically monitoring the status of the battery module to determine whether the ambient temperature has reached the battery module The charging conditions. In this way, the uninterruptible power supply system can operate under extreme ambient temperature and the batteries used therein can also not be damaged under the extreme environment.

Although the present invention has been disclosed as above by means of implementation, it is not intended to limit the present invention. Anyone with ordinary knowledge in this technical field may make various modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be as defined by the scope of the appended patent application.

100:Uninterruptible power supply system 110: first voltage converter 120: second voltage converter 130: the third voltage converter 140A: first switch 140B: second switch 140C: The third switch 140D: The fourth switch 150: battery module 160: Charging module 170: Controller 180:Communication module 182: Monitoring interface 190: temperature sensor 310, 320, 330, 340, 350: steps 500: AC power supply terminal 600: load

In order to make the above and other purposes, features, advantages and embodiments of the present invention more clearly understood, the accompanying drawings are described as follows: Fig. 1 is a schematic diagram showing the configuration of an uninterruptible power supply system according to an embodiment of the present invention; Fig. 2 is a schematic diagram showing the flow of the uninterruptible power supply system supplying power to loads in extreme weather fields according to an embodiment of the present invention; FIG. 3A is a schematic configuration diagram of an uninterruptible power supply system in bypass mode according to an embodiment of the present invention; FIG. 3B is a schematic diagram illustrating the configuration of an uninterruptible power supply system in an online mode according to an embodiment of the present invention; and FIG. 3C is a schematic diagram illustrating the configuration of the uninterruptible power supply system in the battery charging mode according to an embodiment of the present invention.

100:Uninterruptible power supply system

110: first voltage converter

120: second voltage converter

130: the third voltage converter

140A: first switch

140B: second switch

140C: The third switch

140D: The fourth switch

150: battery module

160: Charging module

170: Controller

180:Communication module

182: Monitoring interface

190: temperature sensor

500: AC power supply terminal

600: load

Claims (10)

An uninterruptible power supply system adapted to provide power to a load, the uninterruptible power supply system comprising: a first voltage converter coupled to the load; a second voltage converter coupled to the first voltage converter; a third voltage converter coupled to the first voltage converter; A first switch, coupled to the load and an AC power supply terminal; a second switch, coupled to the second voltage converter and the AC power supply terminal; a battery module coupled to the third voltage converter; a charging module coupled to the battery module; a third switch, coupled to the charging module and the AC power supply terminal; and A controller, coupled to the first switch, the second switch and the third switch, the controller is used to switch between the first switch, the second switch and the third switch according to an ambient temperature and at least a temperature threshold state. The uninterruptible power supply system as described in claim 1, wherein the controller is turned on when the ambient temperature is greater than a first temperature threshold of the at least one temperature threshold and less than a second temperature threshold of the at least one temperature threshold The first switch turns off the second switch and the third switch. The uninterruptible power supply system as described in claim 2, wherein the controller turns on the second switch and turns off when the ambient temperature is greater than the second temperature threshold and less than a third temperature threshold of the at least one temperature threshold the first switch and the third switch. The uninterruptible power supply system as described in claim 3, wherein the controller monitors the state of the battery module when the ambient temperature is greater than the third temperature threshold, and when the ambient temperature is greater than one of the at least one temperature threshold The third switch is turned on when the accumulated time of the fourth temperature threshold reaches a time threshold. In the uninterruptible power supply system as claimed in claim 4, wherein the controller turns off the third switch when the battery module is saturated. The uninterruptible power supply system as described in claim 1, further comprising: A communication module is coupled to the controller and configured to transmit the ambient temperature and charging information of the battery module to a monitoring interface. The uninterruptible power supply system as described in claim 1, further comprising: A temperature sensor is coupled to the controller and configured to sense the ambient temperature. The uninterruptible power supply system as claimed in claim 1, wherein the first voltage converter and the second voltage converter are respectively a DC-AC voltage converter and an AC-DC voltage converter. The uninterruptible power supply system as claimed in claim 1, wherein the first voltage converter and the third voltage converter are a DC-AC voltage converter and a DC-DC voltage converter respectively. The uninterruptible power supply system according to claim 1, wherein the battery module includes a lead-acid battery.

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