CN115037029A - Uninterrupted power supply device and power supply system with same - Google Patents
Uninterrupted power supply device and power supply system with same Download PDFInfo
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- CN115037029A CN115037029A CN202210479816.1A CN202210479816A CN115037029A CN 115037029 A CN115037029 A CN 115037029A CN 202210479816 A CN202210479816 A CN 202210479816A CN 115037029 A CN115037029 A CN 115037029A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries for charging batteries from AC mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
- H02J7/82—Control of state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/855—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
本发明公开了一种不间断供电装置及具有其的供电系统，不间断供电装置与外部电源配合设置，不间断供电装置包括控制器、充电控制电路、输出控制电路及多个电池组，其中，充电控制电路和输出控制电路分别与每个电池组电连接，充电控制电路被配置为对电池组进行充电，输出控制电路被配置为控制电池组放电；控制器与充电控制电路和输出控制电路分别电连接，控制器被配置为当外部电源为外部负载供电时通过外部电源和充电控制电路对电池组进行充电，以及，当外部电源无法为外部负载供电时通过输出控制电路控制电池组放电。本发明通过设置多个控制回路来共同管理电池组的充放电情况，保证了对负载的稳定供电，安全可靠。
The invention discloses an uninterruptible power supply device and a power supply system having the same. The uninterruptible power supply device and an external power supply are arranged in coordination, and the uninterruptible power supply device includes a controller, a charging control circuit, an output control circuit and a plurality of battery packs, wherein, The charging control circuit and the output control circuit are respectively electrically connected to each battery pack, the charging control circuit is configured to charge the battery pack, and the output control circuit is configured to control the discharge of the battery pack; the controller is respectively connected to the charging control circuit and the output control circuit Electrically connected, the controller is configured to charge the battery pack via the external power source and the charge control circuit when the external power source supplies power to the external load, and to control the discharge of the battery pack via the output control circuit when the external power source cannot power the external load. The invention jointly manages the charging and discharging of the battery pack by setting multiple control loops, thereby ensuring the stable power supply to the load and being safe and reliable.
Description
Technical Field
The invention relates to the field of power supply systems, in particular to an uninterruptible power supply device and a power supply system with the same.
Background
Under the condition that the electric power of China is not stable, property loss can be caused once power failure occurs, for example, power failure occurs in banks, even if the power failure is serious, life can be threatened, for example, in hospitals or high-rise buildings, once the power is on fire, a power supply company firstly cuts off the power supply, and at the moment, a fire pump cannot be started, and resistance can be brought to emergency rescue and disaster relief.
Therefore, there is a need for an uninterruptible power supply and a power supply system having the same.
Disclosure of Invention
The invention aims to provide an uninterruptible power supply device and a power supply system with the same.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an uninterruptible power supply device is matched with an external power supply and comprises a controller, a charging control circuit, an output control circuit and a plurality of battery packs, wherein the charging control circuit and the output control circuit are respectively electrically connected with each battery pack, the charging control circuit is configured to charge the battery packs, and the output control circuit is configured to control the discharge of the battery packs;
the controller is electrically connected with the charging control circuit and the output control circuit respectively, and is configured to charge the battery pack through the external power supply and the charging control circuit when the external power supply supplies power to the external load, and to control the battery pack to discharge through the output control circuit when the external power supply cannot supply power to the external load.
Further, the output control circuit is also configured to discharge according to the capacity condition of the battery pack;
when the electric quantity of the battery pack is higher than a first electric quantity threshold value, the output control circuit controls the battery pack to discharge, and when the electric quantity of the battery pack is lower than a second electric quantity threshold value in the discharging process of the battery pack, the output control circuit sends a charging requirement to the controller, and then the controller charges the battery pack through the charging control circuit, wherein the first electric quantity threshold value is larger than or equal to the second electric quantity threshold value; and/or the presence of a gas in the gas,
when the electric quantity of the battery pack is lower than a third electric quantity threshold value, the output control circuit sends a charging demand to the controller, the controller charges the battery pack through the charging control circuit, and when the electric quantity of the battery pack is higher than a fourth electric quantity threshold value in the charging process of the battery pack, the output control circuit controls the battery pack to discharge, wherein the third electric quantity threshold value is smaller than or equal to the second electric quantity threshold value.
Further, the uninterruptible power supply device further comprises a detection control circuit, the detection control circuit is electrically connected with each battery pack and is respectively electrically connected with the controller, and the detection control circuit is configured to detect the electric quantity condition of each battery pack in real time and send the electric quantity condition to the controller.
Further, the detection control circuit includes JC1, JC2, JC3, JC4, the uninterruptible power supply device includes a first battery pack and a second battery pack, the JC1 and the JC2 are configured to detect a voltage of the first battery pack, the JC3 and the JC4 are configured to detect a voltage of the second battery pack;
when the JC1 and the JC2 both detect a low-voltage signal, the detection control circuit sends a charging requirement to the controller, and then the controller charges the first battery pack through the charging control circuit; and/or the presence of a gas in the gas,
when the JC3 and the JC4 both detect a high-voltage signal, the detection control circuit sends a discharging requirement to the controller, and then the controller controls the second battery pack to discharge through the output control circuit.
Further, the detection control circuit further comprises an alarm circuit configured to output a high voltage alarm signal or a low voltage alarm signal;
the detection control circuit is further configured to control the alarm circuit to output a high-voltage alarm signal when the detection control circuit detects that the electric quantity of the battery pack is higher than a first electric quantity threshold value, and simultaneously send a discharging requirement to the controller, so that the controller controls the battery pack to discharge through the output control circuit; and/or the presence of a gas in the gas,
the detection control circuit is further configured to control the alarm circuit to output a low-voltage alarm signal when the detection control circuit detects that the electric quantity of the battery pack is lower than a second electric quantity threshold value, and simultaneously send a charging requirement to the controller, so that the controller charges the battery pack through the charging control circuit;
wherein the first charge threshold is greater than or equal to the second charge threshold.
Further, the uninterruptible power supply device comprises two groups of battery packs;
when the electric quantity of the two groups of battery packs is detected to be higher than a first electric quantity threshold value, the detection control circuit controls the alarm circuit to output a high-voltage alarm signal and sends a discharging requirement to the controller, and then the controller controls the two groups of battery packs to discharge respectively through the output control circuit; and/or the presence of a gas in the gas,
when the electric quantity of the two groups of battery packs is detected to be lower than a second electric quantity threshold value, the detection control circuit controls the alarm circuit to output a low-voltage alarm signal and sends a charging demand to the controller, and then the controller charges the two groups of battery packs through the charging control circuit respectively;
wherein the first charge threshold is greater than or equal to the second charge threshold.
Further, the uninterruptible power supply device further comprises a comparison control circuit, the comparison control circuit is electrically connected with each battery pack and the controller respectively, and the comparison control circuit is configured to judge whether to send a charging demand or a discharging demand to the controller based on the electric quantity condition of the battery pack.
Further, the uninterruptible power supply device further comprises an inverter circuit, an input end of the inverter circuit is electrically connected with the battery pack, an output end of the inverter circuit is electrically connected with an external load, and the inverter circuit is configured to convert direct current input by the battery pack into alternating current and output the alternating current to the external load.
A power supply system comprising a primary power supply, a backup power supply, and an uninterruptible power supply as described above, the power supply system being configured to supply power to an external load through any one of the primary power supply, the backup power supply, and the uninterruptible power supply.
Further, the power supply system further comprises a first change-over switch and a second change-over switch;
the main power supply and the standby power supply are respectively and electrically connected to the input end of the first change-over switch, the output end of the first change-over switch is respectively and electrically connected with the respective input ends of the uninterruptible power supply device and the second change-over switch, and the output end of the second change-over switch is electrically connected with an external load;
the first transfer switch is configured to switch on the rest power supply in response to the power failure of one of the main power supply and the backup power supply, and the second transfer switch is configured to switch on the uninterruptible power supply in response to the power failure of both the main power supply and the backup power supply;
the primary power supply or the backup power supply is configured to charge a battery pack of the uninterruptible power supply while supplying power to an external load; when the main power supply source and the standby power supply can not supply power to an external load, the power supply system controls the battery pack of the uninterrupted power supply device to discharge so as to supply power to the external load.
The uninterrupted power supply device provided by the invention manages the charging and discharging conditions of the battery pack together by arranging a plurality of control loops such as the charging control circuit, the output control circuit and the (current and voltage) detection loop, ensures stable power supply to a load, is safe and reliable, and reduces the cost under the condition of ensuring the normal operation of a system by combining the use of a relay; meanwhile, the power supply system provided by the invention can ensure uninterrupted power supply to the load and reserve the time for maintenance.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a charging control circuit of an uninterruptible power supply device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an output control circuit of an uninterruptible power supply device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a detection control circuit of an uninterruptible power supply device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a comparison control circuit of an uninterruptible power supply device according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an uninterruptible power supply apparatus according to an embodiment of the present invention;
fig. 6 is a schematic wiring diagram of an uninterruptible power supply according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a power supply system provided by an embodiment of the invention.
Wherein the reference numerals include: 11-a first battery pack, 12-a second battery pack, 3-a relay, 41-a main power supply source, 42-a standby power supply, 43-an uninterruptible power supply device, 51-a first change-over switch, 52-a second change-over switch and 6-a load circuit.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
In an embodiment of the present invention, an uninterruptible power supply apparatus is provided, the uninterruptible power supply apparatus being configured to cooperate with an external power source, and the uninterruptible power supply apparatus including a controller, a charging control circuit, an output control circuit, a detection control circuit, a comparison control circuit, and a plurality of battery packs, wherein the controller is electrically connected to the charging control circuit, the output control circuit, the detection control circuit, the comparison control circuit, and the plurality of battery packs, respectively, and is configured to charge the battery packs through the external power source and the charging control circuit when the external power source supplies power to an external load, and to control the battery packs to discharge through the output control circuit when the external power source fails to supply power to the external load. In the present embodiment, as shown in fig. 5, the number of battery packs is two, that is, a first battery pack 11 and a second battery pack 12, each battery pack includes sixteen batteries and four relays 3, the batteries are provided in cooperation with the relays 3 so that the batteries can be charged or discharged under the control of the controller, and in addition, in the present embodiment, the model number of the batteries is DC12V 60AH, and the relays 3 are DC solid-state relays, but the protection scope of the present invention is not limited by the number or model number of the batteries and the relays 3.
The charging control circuit is configured to charge the battery packs, as shown in fig. 1 and 5, when KM1, KM2, KM3 and KM4 are all closed, meaning that the first battery pack 11 is being charged, the corresponding indicator light is on; when KM5, KM6, KM7, and KM8 are all closed, it means that the second battery pack 12 is being charged, and the corresponding indicator lamp is on.
The output control circuit is electrically connected with each battery pack, as shown in fig. 2, and is configured to control the discharge of the battery pack, and is also configured to discharge according to the charge condition of the battery pack. Specifically, when the electric quantity of the battery pack is higher than a first electric quantity threshold, the output control circuit controls the battery pack to discharge, and when the electric quantity of the battery pack is lower than a second electric quantity threshold in the discharging process of the battery pack, the output control circuit sends a charging demand to the controller, and then the controller charges the battery pack through the charging control circuit, wherein the first electric quantity threshold is larger than or equal to the second electric quantity threshold; and/or when the electric quantity of the battery pack is lower than a third electric quantity threshold value, the output control circuit sends a charging demand to the controller, the controller charges the battery pack through the charging control circuit, and when the electric quantity of the battery pack is higher than a fourth electric quantity threshold value in the charging process of the battery pack, the output control circuit controls the battery pack to discharge, wherein the third electric quantity threshold value is smaller than or equal to the second electric quantity threshold value. In one embodiment of the invention, the first power threshold is equal to the fourth power threshold, and the third power threshold is equal to the second power threshold.
The detection control circuit is electrically connected with each battery pack and is configured to detect the electric quantity condition of each battery pack in real time and send the electric quantity condition to the controller. In one embodiment of the present invention, the detection control circuit includes JC1, JC2, JC3, JC4 configured to detect the battery voltages, as shown in fig. 5, JC1 and JC2 are configured to detect the voltage of the first battery pack 11, and JC3 and JC4 are configured to detect the voltage of the remaining second battery pack 12. Specifically, as shown in fig. 3, the detection control circuit is configured to send a charging demand to the controller when JC1 and JC2 both detect a low voltage signal, and the controller charges the first battery pack 11 through the charging control circuit; and/or, the detection control circuit is configured to send a discharge demand to the controller when both JC3 and JC4 detect a high voltage signal, and the controller controls the second battery pack 12 to discharge through the output control circuit. In the present embodiment, as shown in fig. 3, when JC1 and JC2 detect that the first battery pack 11 is at low voltage, the first battery pack 11 is controlled to start charging, and after a while, when JC1 and JC2 detect that the first battery pack 11 is at high voltage, a signal that the first battery pack 11 completes charging is output to stop charging or perform discharging action.
In one embodiment of the invention, the detection control circuit further comprises an alarm circuit configured to output a high voltage alarm signal or a low voltage alarm signal. Specifically, the detection control circuit is further configured to control the alarm circuit to output a high-voltage alarm signal when detecting that the electric quantity of the battery pack is higher than a first electric quantity threshold value, and simultaneously send a discharging requirement to the controller, so that the controller controls the battery pack to discharge through the output control circuit; and/or the detection control circuit is further configured to control the alarm circuit to output a low-voltage alarm signal when the detected electric quantity of the battery pack is lower than the second electric quantity threshold value, and simultaneously send a charging demand to the controller, so that the controller charges the battery pack through the charging control circuit; wherein the first threshold of electrical quantity is greater than or equal to the second threshold of electrical quantity.
In one embodiment of the invention, the detection control circuit is further configured to, when it is detected that the electric quantities of the two groups of battery packs are both higher than the first electric quantity threshold value, control the alarm circuit to output a high-voltage alarm signal and simultaneously send a discharging requirement to the controller, and then the controller controls the two groups of battery packs to respectively discharge through the output control circuit; and/or the detection control circuit is further configured to control the alarm circuit to output a low-voltage alarm signal when the detection control circuit detects that the electric quantity of the two groups of battery packs is lower than a second electric quantity threshold value, and simultaneously send a charging demand to the controller, so that the controller charges the two groups of battery packs respectively through the charging control circuit; wherein the first charge threshold is greater than or equal to the second charge threshold.
The uninterruptible power supply device further comprises a comparison control circuit, the comparison control circuit is electrically connected with each battery pack and the controller respectively, and the comparison control circuit is configured to judge whether to send a charging requirement or a discharging requirement to the controller based on the electric quantity condition of the battery pack. In the present embodiment, as shown in fig. 4, the comparison control circuit is configured to perform a forced charging operation on the first battery pack 11 and the second battery pack 12 in combination with the controller when the comparison finds that the voltages of the first battery pack 11 and the second battery pack 12 are both low-voltage signals, and/or perform a forced discharging operation on the first battery pack 11 and the second battery pack 12 in combination with the controller when the comparison finds that the voltages of the first battery pack 11 and the second battery pack 12 are both high-voltage signals. The forced charging and discharging is beneficial to ensuring that when the circuit has problems, the battery cannot be charged/discharged in time to cause battery damage, or the load cannot be continuously supplied with power to influence the normal use of the power supply system.
In an embodiment of the present invention, the uninterruptible power supply further includes an inverter circuit, an input terminal of the inverter circuit is electrically connected to the battery pack, an output terminal of the inverter circuit is electrically connected to an external load, and the inverter circuit is configured to convert a direct current input from the battery pack into an alternating current and output the alternating current to the external load.
In one embodiment of the present invention, the uninterruptible power supply includes two groups of battery packs, as shown in fig. 6, Y0 of the first group of battery packs is closed to start charging, the output of the second group of battery packs, that is, Y3, is also closed, the inverter has output, and then the output of the first group of battery packs is immediately closed, that is, Y1 is opened to stop outputting. Y2 of the second group of battery packs is closed to start charging, the output of the first group of battery packs, namely Y1, is also started to be closed, the inverter has output, and then the output of the second group of battery packs is immediately closed, namely Y3 is opened to be opened to stop outputting. In practical application, if the two groups of battery packs are in low power, the KA21 and KA23 act, the Y1 and Y3 stop outputting, meanwhile, the external line has low power alarm output, and the uninterrupted power supply device can force the two groups of battery packs to be charged. Similarly, if both battery packs are in high-capacity, then KA22, KA24 are activated, so KA26 is also activated, and the external line has a high-capacity alarm output, so that KA26 is activated to activate the second group of outputs, and at this time, the inverter has inverted electric output, and the charging of both battery packs is turned off.
In one embodiment of the present invention, a power supply system is provided, as shown in fig. 6, the power supply system includes a main power supply 41, a backup power supply 42, an uninterruptible power supply 43 as described above, a first transfer switch 51, and a second transfer switch 52. The present power supply system is configured to supply power to the external load circuit 6 by any one of the main power supply 41, the backup power supply 42, and the uninterruptible power supply device 43.
The main power supply 41 and the backup power supply 42 are electrically connected to respective input terminals of a first transfer switch 51, an output terminal of the first transfer switch 51 is electrically connected to respective input terminals of the uninterruptible power supply 43 and a second transfer switch 52, and an output terminal of the second transfer switch 52 is electrically connected to an external load. In the present embodiment, the model of the first transfer switch 51 and the second transfer switch 52 is SKT1-160A/3P/M1, but the protection scope of the present invention is not limited thereto, and the specific model is determined according to the actual requirement.
The first changeover switch 51 is configured to close one of the main power supply 41 and the backup power supply 42 in response to a power failure of the remaining power supply. The second transfer switch 52 is configured to close the uninterruptible power supply 43 in response to the power outage occurring in both the main power supply 41 and the backup power supply 42.
When the main power supply 41 is normally transmitting power, the main power supply 41 charges the battery pack of the uninterruptible power supply 43 while supplying power to the external load, so that in the subsequent power supply process, if the main power supply 41 fails, the power supply system can supply power to the load circuit 6 by switching to the backup power supply 42, or supply power to the load circuit 6 by using the power stored in the uninterruptible power supply 43, thereby avoiding the failure of the main power supply 41 and the non-availability of the load circuit 6.
When the two common power supplies, namely the main power supply 41 and the standby power supply 42, cannot supply power to the external load, the power supply system controls the battery pack of the uninterruptible power supply device 43 to discharge to supply power to the external load circuit 6, so that the purpose of supplying power to the external load uninterruptedly is achieved.
According to the invention, the additional battery pack is charged while the common power supply is normally powered, so that the electricity stored in the battery pack can be utilized to supply power when the common power supply is powered off, and the purpose of continuous power supply is realized.
The idea of the embodiment of the power supply system is the same as the working process of the uninterruptible power supply device in the embodiment, and the entire content of the embodiment of the uninterruptible power supply device is incorporated into the embodiment of the power supply system by way of full citation, which is not described again.
The sequence of the above embodiments of the present invention is only for description, and does not represent the advantages or disadvantages of the embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The uninterruptible power supply device is characterized by being matched with an external power supply, and comprising a controller, a charging control circuit, an output control circuit and a plurality of battery packs, wherein the charging control circuit and the output control circuit are respectively electrically connected with each battery pack, the charging control circuit is configured to charge the battery packs, and the output control circuit is configured to control the battery packs to discharge;
the controller is electrically connected with the charging control circuit and the output control circuit respectively, and is configured to charge the battery pack through the external power supply and the charging control circuit when the external power supply supplies power to the external load, and to control the battery pack to discharge through the output control circuit when the external power supply cannot supply power to the external load.
2. The uninterruptible power supply of claim 1, wherein the output control circuit is further configured to discharge based on a charge condition of the battery pack;
when the electric quantity of the battery pack is higher than a first electric quantity threshold value, the output control circuit controls the battery pack to discharge, and when the electric quantity of the battery pack is lower than a second electric quantity threshold value in the discharging process of the battery pack, the output control circuit sends a charging requirement to the controller, and then the controller charges the battery pack through the charging control circuit, wherein the first electric quantity threshold value is larger than or equal to the second electric quantity threshold value; and/or the presence of a gas in the gas,
when the electric quantity of the battery pack is lower than a third electric quantity threshold value, the output control circuit sends a charging demand to the controller, the controller charges the battery pack through the charging control circuit, and when the electric quantity of the battery pack is higher than a fourth electric quantity threshold value in the charging process of the battery pack, the output control circuit controls the battery pack to discharge, wherein the third electric quantity threshold value is smaller than or equal to the second electric quantity threshold value.
3. The uninterruptible power supply according to claim 1, further comprising a detection control circuit electrically connected to each battery pack and the controller, respectively, the detection control circuit being configured to detect a charge condition of each battery pack in real time and send the charge condition to the controller.
4. The uninterruptible power supply of claim 3, wherein the detection control circuit comprises a JC1, JC2, JC3, JC4, the uninterruptible power supply comprising a first battery pack and a second battery pack, the JC1 and the JC2 being configured to detect a voltage of the first battery pack, the JC3 and the JC4 being configured to detect a voltage of the remaining second battery pack;
when the JC1 and the JC2 both detect a low-voltage signal, the detection control circuit sends a charging requirement to the controller, and then the controller charges the first battery pack through the charging control circuit; and/or the presence of a gas in the gas,
when JC3 and JC4 both detect high voltage signals, the detection control circuit sends the discharge requirement to the controller, and then the controller controls the discharge of the second battery pack through the output control circuit.
5. The uninterruptible power supply of claim 3, wherein the detection control circuit further comprises an alarm circuit configured to output a high voltage alarm signal or a low voltage alarm signal;
the detection control circuit is further configured to control the alarm circuit to output a high-voltage alarm signal when the detection control circuit detects that the electric quantity of the battery pack is higher than a first electric quantity threshold value, and simultaneously send a discharging requirement to the controller, so that the controller controls the battery pack to discharge through the output control circuit; and/or the presence of a gas in the gas,
the detection control circuit is further configured to control the alarm circuit to output a low-voltage alarm signal when the detection control circuit detects that the electric quantity of the battery pack is lower than a second electric quantity threshold value, and simultaneously send a charging requirement to the controller, so that the controller charges the battery pack through the charging control circuit;
wherein the first charge threshold is greater than or equal to the second charge threshold.
6. The uninterruptible power supply of claim 5, wherein the uninterruptible power supply includes two sets of battery packs;
when the electric quantity of the two groups of battery packs is detected to be higher than a first electric quantity threshold value, the detection control circuit controls the alarm circuit to output a high-voltage alarm signal and sends a discharging requirement to the controller, and then the controller controls the two groups of battery packs to discharge respectively through the output control circuit;
and/or when the electric quantity of the two groups of battery packs is detected to be lower than a second electric quantity threshold value, the detection control circuit controls the alarm circuit to output a low-voltage alarm signal and send a charging demand to the controller, and then the controller charges the two groups of battery packs through the charging control circuit respectively;
wherein the first charge threshold is greater than or equal to the second charge threshold.
7. The uninterruptible power supply device according to claim 1, further comprising a comparison control circuit electrically connected to each of the battery packs and the controller, respectively, the comparison control circuit configured to determine whether to send a charging demand or a discharging demand to the controller based on a charge condition of the battery packs.
8. The uninterruptible power supply apparatus according to claim 1, further comprising an inverter circuit having an input terminal electrically connected to the battery pack and an output terminal electrically connected to an external load, the inverter circuit being configured to convert a direct current input from the battery pack into an alternating current and output the alternating current to the external load.
9. A power supply system, characterized in that the power supply system comprises a main power supply (41), a backup power supply (42) and an uninterruptible power supply (43) as claimed in any of claims 1 to 9, the power supply system being configured to supply power to an external load through any of the main power supply (41), the backup power supply (42) and the uninterruptible power supply (43).
10. The power supply system according to claim 9, characterized in that it further comprises a first changeover switch (51) and a second changeover switch (52);
the main power supply (41) and the standby power supply (42) are respectively and electrically connected to the input end of the first transfer switch (51), the output end of the first transfer switch (51) is respectively and electrically connected with the input end of the uninterrupted power supply device (43) and the input end of the second transfer switch (52), and the output end of the second transfer switch (52) is electrically connected with an external load;
the first transfer switch (51) is configured to switch on one of the main power supply (41) and the backup power supply (42) in response to a power failure of the remaining power supply, and the second transfer switch (52) is configured to switch on the uninterruptible power supply (43) in response to a power failure of both the main power supply (41) and the backup power supply (42);
the primary power supply (41) or the backup power supply (42) is configured to charge a battery pack of the uninterruptible power supply device (43) while supplying power to an external load; when the main power supply (41) and the standby power supply (42) cannot supply power to an external load, the power supply system controls the battery pack of the uninterruptible power supply device (43) to discharge to supply power to the external load.
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