CN210137209U - Portable integrated uninterruption ac/dc power source - Google Patents
Portable integrated uninterruption ac/dc power source Download PDFInfo
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Abstract
The utility model provides a portable integrated uninterrupted AC/DC power supply, which comprises a 220V30AH lithium battery pack, a high-frequency switch rectifying module for electric power, an electric UPS module and a monitoring system; the 220V30AH lithium battery pack is connected in parallel with 220V direct current output of the high-frequency switch rectifying module for electric power, and direct current 220V uninterrupted output can be realized; the high-frequency switch rectifying module for the electric power charges the lithium battery pack by taking an external alternating current 220V power supply as an input power supply; the external alternating current 220V power supply and the 220V30AH lithium battery pack are connected with an input power UPS module, and the power UPS module realizes the uninterrupted output of alternating current 220V; the monitoring system is connected to the battery management system, the high-frequency switch rectifying module and the electric UPS module respectively, the battery management system is connected with the lithium battery pack, and the monitoring system monitors the working states of the lithium battery pack, the high-frequency switch rectifying module and the electric UPS module. The method can realize uninterrupted AC output and DC output respectively and simultaneously, and has strong applicability.
Description
Technical Field
The disclosure relates to the technical field of uninterruptible power supplies, in particular to a portable integrated uninterruptible alternating current/direct current power supply.
Background
The battery operating regulations stipulate: if the storage battery pack of the transformer substation is subjected to three times of full-check discharging and charging tests, the capacity of the storage battery pack cannot reach more than 80% of the rated capacity of the storage battery pack, and replacement should be arranged. Practice proves that the storage battery pack which runs for more than 6 years is more than half of the storage battery pack when the capacity of the storage battery is found to be less than 80% through full-check discharge and charge. The storage battery packs of the transformer substation with the 110kV voltage level are all in single-group configuration, a temporary standby storage battery pack is built by utilizing the lead-acid battery pack during full-capacity discharge, the battery pack is connected into a direct-current system and then quitted from full-capacity discharge, and the mode has the defects that the lead-acid battery pack is heavy, and time and labor are wasted during building and connection due to the fact that the lead-acid battery pack needs to climb stairs for carrying in many times. For this reason, the storage battery pack is directly withdrawn from operation without accessing a temporary battery pack for full-check discharging and charging, which is not in accordance with the regulations and brings serious operation risks to the direct current system. Therefore, the storage battery pack which is convenient to carry and connect is needed to be used in the working field.
The inventor finds in research that when a transformer substation is transformed, a temporary alternating current and direct current power supply system needs to be built firstly for protection, monitoring and signal system use, a storage battery screen, a direct current screen, an alternating current screen and a UPS screen are usually needed, and the integrated alternating current and direct current power supply system is often limited in site, difficult to build, time-consuming and labor-consuming, non-standard and low in safety, so that the integrated alternating current and direct current power supply system which is small in size, light in weight and easy to carry and install is needed on site.
SUMMERY OF THE UTILITY MODEL
The purpose of this description implementation mode is to provide portable integrated incessant alternating current-direct current power supply, and the power of this disclosure can realize incessant alternating current output and direct current output simultaneously, and the suitability is strong.
The embodiment of the specification provides a portable integrated uninterruptible alternating current/direct current power supply, which is realized by the following technical scheme:
the method comprises the following steps:
the system comprises a lithium battery pack, a high-frequency switch rectifying module for electric power, an electric power UPS module and a monitoring system;
the lithium battery pack is connected in parallel with the direct current output of the high-frequency switch rectifying module for electric power, the high-frequency switch rectifying module for electric power takes an external alternating current 220V power supply as an input power supply and is controlled by an air circuit breaker, and the lithium battery pack can realize uninterrupted direct current 220V output after being connected in parallel with the direct current output of the high-frequency switch rectifying module for electric power;
a circuit formed by connecting the auxiliary contact of a KT2 charging relay and a diode in parallel, a circuit formed by connecting the auxiliary contact of a KT3 discharging relay and a diode in parallel and a protective tube are connected in series on a '+' loop connected with the high-frequency switch rectifying module and the storage battery; and the "+" loop is provided with a Hall element;
the external AC220V power supply and the lithium battery pack are connected with an input power UPS module, an air circuit breaker is respectively arranged at the AC/DC input ends for control, and the power UPS module can realize 220V uninterrupted AC output;
the input end of the uninterrupted DC output loop is respectively connected with the power UPS module and the high-frequency switch rectifying module for power;
the monitoring system is connected to the battery management system BMS, the touch display screen, the high-frequency switch rectifying module for electric power and the electric power UPS module respectively, the battery management system is connected with the lithium battery pack, and the monitoring system monitors the working states of the lithium battery pack, the high-frequency switch rectifying module for electric power and the electric power UPS module.
A BMS and a touch display screen in the monitoring system adopt a DC220V/DC24kV switching power supply to provide working power supply;
the input end of the DC220V/DC24kV switching power supply is connected with a 220V direct current output loop, the output end of the DC220V/DC24kV switching power supply is connected with a BMS and a touch screen, and a parallel circuit consisting of a BMS startup button switch and a KT1 relay auxiliary contact and a 47 omega 10W metal shell resistor are connected in series in the switching power supply input loop.
The BMS system adopts the mode that 3 BMS configurations were altogether from one owner two, and 20 voltage of string of group battery are gathered in real time to every BMS, and main BMS is responsible for battery temperature and gathers, and charge-discharge current gathers, realizes automatic control, exports to control relay.
And the communication connection mode of each part of the monitoring system adopts a 485 communication mode for connection.
The lithium battery pack is a 220V30AH lithium battery pack and is formed by connecting 60 strings of ternary lithium battery packs in series, and each string is formed by combining 26650 single batteries 6.
The output end of the uninterrupted direct current output loop is provided with 3 paths of aviation plug connectors, 3 paths of air circuit breakers are correspondingly arranged for on-off control, and diodes for preventing reverse charging are arranged on the output '+' loop.
The embodiment of the specification provides a monitoring method for a portable integrated uninterruptible alternating current/direct current power supply, which is realized by the following technical scheme:
the method comprises the following steps:
the high-frequency switch rectifier module for electric power is connected with an alternating current power supply;
after the battery management system is subjected to power-on work self-checking, if the battery management system is normally communicated with the high-frequency switch rectifying module for electric power, the charging relay is closed, and the high-frequency switch rectifying module for electric power starts to charge the battery pack;
when the voltage of the single battery is greater than or equal to the voltage set value and the current is smaller than the current set value, the SOC is set to be 100%, the charger continues to keep the charging state at the moment, the charging relay is disconnected when the battery has overvoltage protection, the charging is stopped, the charging relay is closed again when the voltage of the single battery is lower than the voltage set value, and the battery enters the charging state again.
According to the further technical scheme, when the power UPS works in an on-line mode when alternating current is input, the DC/DC converter at the direct current end is in a shutdown state; when the input alternating current is abnormal, the DC/DC converter at the direct current end is started, zero switching between alternating current and direct current power supply is realized, and meanwhile standby loss of the direct current end is reduced.
Compared with the prior art, the beneficial effect of this disclosure is:
the present disclosure is capable of outputting uninterrupted ac and dc separately and simultaneously. The electric UPS is fully digitally controlled, a DSP controller TMS320F2808 of the TI is adopted to take charge of control, switching, parallel algorithm processing and fault processing of the whole module, and the electric UPS is good in consistency and strong in anti-interference capability. The efficiency of online alternating current power supply during working is as high as 92%; the efficiency is as high as 90% when the standby direct current is supplied. The DC standby zero power consumption is realized, and when the input alternating current works online, a DC/DC converter at a direct current end is in a shutdown state; when the input alternating current is abnormal, the DC/DC converter at the direct current end is quickly started, zero switching between alternating current and direct current power supply is realized, and meanwhile standby loss of the direct current end is effectively reduced. The UPS is on-line, and the AC power supply and the DC power supply work in zero switching time. The output of the high-frequency switch rectification power supply module is connected with the storage battery in parallel, so that the uninterrupted output of direct current is ensured. The conversion efficiency of the module is more than 90%. The module has perfect protection and alarm functions, including input over/under voltage, output over voltage, over temperature, over current and the like. The short circuit retraction protection is arranged in the module, so that the module output is not damaged even if the module output is in a short circuit state for a long time. The device is connected to a direct current system of a transformer substation to replace an original lead-acid battery pack, full-nuclear-capacity discharge is carried out on the lead-acid battery pack, the battery pack connected to the system can be used as a power supply to output when necessary, and 20A current can be continuously output for 1.5 hours. Therefore, the problem that a transformer substation configured by a single group of storage batteries cannot carry out full-check charging and discharging on the storage battery pack is perfectly solved.
In another embodiment, the device can be used by connecting a plurality of batteries in parallel, and the lithium battery pack comprising the device can be connected with the lithium battery packs of other devices of the same type in parallel for use so as to increase the capacity of the battery pack and meet the requirements of different occasions on the capacity of the battery pack; the high-frequency switch rectification power supply module can also be used in parallel with high-frequency switch rectification power supply modules of other devices of the same type, so that the capacity of the high-frequency switch rectification power supply module is increased, and the requirements of different occasions on the output capacity of the high-frequency switch rectification power supply module are met; the power UPS can also be used in parallel with other power UPSs of the same type of devices so as to meet the requirements of different occasions on the output capacity of the power UPS.
In a specific implementation example, the alternating current/direct current power supply can be used as a standby alternating current/direct current power supply of a transformer substation, can be temporarily replaced when an alternating current or direct current system of the transformer substation fails, and can be conveniently accessed. When an alternating current and direct current system is not built in the process of building or transforming a transformer substation, secondary equipment such as protection, control and the like can be powered and debugged by accessing the system, so that the construction period is advanced. The method is used for 1/2 which saves manpower as the original mode in the process of battery full-check discharge, and the working hour is 1/5. When the system is applied to transformation of a transformer substation as a transformer substation alternating current and direct current system, the manpower is only 1/10 in the original mode, and the working hour is only 1/8.
The ternary lithium battery pack used by the alternating current and direct current power supply is high in portability and efficiency. The 26650 ternary lithium battery pack of 220V30AH has high energy density, the volume is 1/12 of a lead-acid battery pack with the same capacity, the mass is 1/8, the cycle life is more than 500 times, and the service life is 4 times of that of the lead-acid battery pack.
The monitoring system developed on the basis of the BMS (battery management system) of the AC/DC power supply can realize the temperature management and the voltage and current management of the storage battery, can also realize the real-time monitoring of the charger and the UPS, and ensures the intelligent charging of the storage battery. The touch screen has the advantages of attractive human-computer interface, full Chinese display, easy operation, convenience in checking various data and parameter setting.
The alternating current and direct current power supply can automatically realize the alarm and action protection of overvoltage, undervoltage, overcurrent and overtemperature, and the direct current output port has the function of preventing reverse charging.
The alternating current and direct current power supply can be used in parallel by multiple machines so as to meet the requirements of different occasions on alternating current and direct current output capacity, and the capacity adjustment is flexible. The device is proved to solve the problem that no portable and easy-to-use standby integrated power supply is used for the work of the transformer substation by being used in the transformer substation for a long time, greatly improves the working efficiency and enhances the level of safe operation. The efficacy of the device is fully proved in the process of multiple times of trial use in other power-preserving occasions.
The alternating current and direct current power supply is light, easy to use and efficient, can be applied to a transformer substation and a distribution station area, can be used for emergency power supply after equipment failure and power failure of the station area, can also be used in various power protection occasions and the fields of emergency rescue, disaster resistance and rescue, and has the advantages of no noise, no pollution and convenience compared with a mode of using a generator for power supply. The device can be popularized in the power industry and can also be popularized and used in other industry fields.
The performance of the ternary lithium battery is rapidly improved by the improvement of the technology and the improvement of the manufacturing process of the ternary lithium battery and the reliable battery management system, so that the ternary lithium battery is widely accepted by the market, and the ternary lithium battery is generally applied to the fields of automobiles, military industry, digital products and the like. The electric power industry has also been conducting application research, and some electric power enterprises have been tried out in advance. The power enterprises advocate science and technology to be prosperous, and have stronger thought and wish in the industry to improve technical content and work efficiency of the AC/DC power supply system, so there is very big market demand to this kind of device, and at present there is not such light type integration uninterrupted AC/DC power supply of this kind to be applied to work in domestic electric power industry yet, so market potential is huge.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is a diagram of electrical connections of a portable integrated uninterruptible AC/DC power supply according to an embodiment of the present disclosure;
FIG. 2 is a diagram of electrical connections of a portable integrated uninterruptible AC/DC power supply according to an embodiment of the disclosure;
FIG. 3 is a front view of an external view of a portable integrated uninterruptible AC/DC power supply according to an embodiment of the disclosure, as shown in FIG. 1
(open front door time diagram);
FIG. 4 is a rear view of an external view of a portable integrated UPS according to an embodiment of the present disclosure;
FIG. 5 is a front view of an external view of a portable integrated UPS according to an embodiment of the present disclosure, FIG. 2
(closed front door time diagram);
in fig. 3: 1. a "BMS off button switch; 2. a "BMS on" button switch; 3. UPS alternating current input air circuit breaker; 4. "UPS dc input" air circuit breaker; 5. "DC 220V output 1" air break; 6. "DC 220V output 2" air break; 7. "DC 220V output 3" air break; 8. "AC 220V output 1" air break; 9. "AC 220V output 2" air break; 10. "AC 220V output 3" air break; 11. the charger inputs AC into an air circuit breaker; 12. a touch control screen; 13. a high-frequency switch rectifying module for electric power; 14. a power UPS module; 15. a front door; 16. a wheel; 17. a battery pack (inside); 18. a hasp is provided.
In fig. 4: 19. a vent hole; 20. "DC 220V output 1" aviation socket; 21. "DC 220V output 2" aviation socket; 22. "DC 220V output 3" aviation socket; 23. "AC 220V output 1" airline socket; 24. "AC 220V output 2" airline socket; 25. "AC 220V output 3" airline socket; 26. the "AC 220V input" airline socket.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example of implementation 1
The embodiment discloses a portable integrated uninterruptible alternating current/direct current power supply, which is shown in the attached drawings 1-2 and comprises the following components: the device comprises a 220V30AH ternary lithium battery pack, a high-frequency switch rectifying module for electric power, an electric UPS module, a monitoring system consisting of a touch monitoring display screen and a Battery Management System (BMS), and the like.
The 220V30AH lithium battery pack is formed by connecting 60 strings of ternary lithium battery packs in series, and each string adopts 26650 single batteries 6 and is combined.
The 220V30AH lithium battery pack is connected with the direct current output of the high-frequency switch rectifying module for electric power in parallel, the high-frequency switch rectifying module for electric power uses an external alternating current 220V power supply as an input power supply and is controlled by an air circuit breaker, and the uninterrupted direct current 220V output can be realized after the lithium battery pack is connected with the direct current output of the high-frequency switch rectifying module for electric power in parallel. A circuit formed by connecting the auxiliary contact of a KT2 charging relay and a diode in parallel, a circuit formed by connecting the auxiliary contact of a KT3 discharging relay and a diode in parallel and a 450V100A protective tube are connected in series on a '+' loop connected with the high-frequency switch rectifying module and the storage battery; and the "+" loop is provided with a Hall element;
external exchange 220V power and 220V30AH lithium cell group connect input electric power UPS module, respectively establish an air circuit breaker at the alternating current-direct current input and control, the uninterrupted AC output of 220V can be realized to electric power UPS module.
The uninterrupted DC output circuit is provided with 3 aviation plug connectors for connecting with the outside, 3 air circuit breakers are correspondingly arranged for on-off control, and diodes for preventing reverse charging are arranged on the output '+' circuit.
The monitoring system is connected to a Battery Management System (BMS), a touch display screen, a high-frequency switch rectifying module for electric power and an electric UPS module respectively, the battery management system is connected with the lithium battery pack, and the monitoring system monitors the working states of the lithium battery pack, the high-frequency switch rectifying module for electric power and the electric UPS module.
A BMS and a touch display screen in the monitoring system adopt a DC220V/DC24kV switching power supply to provide working power supply. The input end of the DC220V/DC24kV switching power supply is connected with a 220V direct current output loop, the output end of the DC220V/DC24kV switching power supply is connected with a BMS and a touch screen, and a parallel circuit consisting of a BMS startup button switch and a KT1 relay auxiliary contact and a 47 omega 10W metal shell resistor are connected in series in the switching power supply input loop. The BMS system adopts the mode that 3 BMS configurations were altogether from one owner two, and 20 voltage of string of group battery are gathered in real time to every BMS, and main BMS is responsible for battery temperature and gathers, and charge-discharge current gathers, realizes automatic control, exports to control relay.
And the communication connection mode of each part of the monitoring system adopts a 485 communication mode for connection.
The uninterrupted output direct current disclosed by the invention is characterized in that the 220V ternary lithium battery pack is automatically and intelligently charged by utilizing the high-frequency switch rectifying module for electric power, the 220V lithium battery pack is connected with the 220V direct current output of the high-frequency switch rectifying module for electric power in parallel, the uninterrupted direct current output of rated voltage DC220V is realized, and the rated output current is 20A. The uninterrupted output alternating current disclosed by the invention is characterized in that an external commercial power AC220V power supply and a DC220V power supply of a 220V lithium battery pack are used as input power supplies to be connected into an electric UPS, under the mode of alternating current power supply, the 220V alternating current is boosted to +/-380 VDC through double BOOSTs, and then is filtered by an LC through a half-bridge inverter to output 220V stable alternating current; when the commercial power alternating current input is in power failure, the UPS is switched to the battery for power supply without interruption, the direct current 220V input is boosted to isolated +/-380 VDC after isolated high-frequency full-bridge conversion, and then the direct current 220V input is inverted to output rated 220V alternating current for use, and the rated output power is 5 kW.
The monitoring system that above-mentioned 220V30AH ternary lithium cell group, high frequency switch rectifier module for electric power, electric power UPS module, tangible control display screen and Battery Management System (BMS) are constituteed collects in the size: 545mm 610mm 490mm (wide high thick) iron box, the quality is 90 kilograms, and the bottom of the box is equipped with the braked gyro wheel, and both sides are equipped with 4 handles, conveniently remove and lift. The front of the box body is provided with an openable front door which is provided with transparent organic glass, the running condition of internal equipment can be conveniently monitored when the front door is closed, and the front door can be locked by a hasp after being closed. A groove 380mm wide, 180mm high and 100mm deep is formed in the lower portion of the rear portion of the box body, connecting aviation sockets for 3 paths of alternating current output, 3 paths of direct current output and 1 path of alternating current input are arranged in the groove, each socket is provided with a plastic protective cap, the design is convenient to connect with an aviation plug, and the connecting portion is prevented from being drenched by rain and colliding.
The appearance is shown in fig. 3, 4 and 5.
Referring to fig. 3 specifically, a front door is installed on one side of the iron box, a buckle 18 is installed on the side of the iron box, wheels 16 are installed at the bottom of the iron box, the front door is opened, a touch control screen 12 is installed in the middle of the panel of the iron box, and a "BMS-off button switch 1 is installed above the touch control screen 12; BMS on button switch 2; "UPS ac input" air circuit breaker 3; "UPS dc input" air circuit breaker 4; "DC 220V output 1" air breaker 5; "DC 220V output 2" air break 6; "DC 220V output 3" air break 7; "AC 220V output 1" air break 8; "AC 220V output 2" air break 9; "AC 220V output 3" air circuit breaker 10; the "charger ac input" is the air circuit breaker 11.
The left side and the right side of the touch control screen 12 are respectively provided with a high-frequency switch rectifying module 13 for electric power, an electric power UPS module 14 is arranged below the touch control screen 12, and a storage battery pack is arranged below the electric power UPS module 14.
Referring to fig. 4 specifically, a plurality of vent holes 19 are formed in the other surface of the iron box, and aviation sockets 20 of "DC 220V output 1" are respectively mounted below the vent holes 19; "DC 220V output 2" aviation socket 21; "DC 220V output 3" aviation socket 22; "AC 220V output 1" airline socket 23; "AC 220V output 2" airline socket 24; "AC 220V out 3" airline socket 25; the "AC 220V input" airline socket 26.
In a specific embodiment, the cell capacity of the battery of the ternary lithium battery pack is 5Ah, the open-circuit voltage: not less than 4.15V (within 2h after full charge), the end voltage is 2.75V, and the weight of a single battery is about 95 g. The battery pack is 60 strings in total, each string is formed by combining 26650 single batteries 6, the capacity of the battery pack is 30Ah, and the weight of the battery pack is less than or equal to 37Kg (comprising an electric core, a die frame, a fastener, a BMS and the like). The working voltage range of the battery pack is 168V-252V, and the platform voltage is 216V. The output energy is more than or equal to 6.4KWh, and the maximum load current is 60A (the time is less than 5S). The normal continuous working current is less than or equal to 20A, the cycle life is more than or equal to 500 times (the battery pack capacity is more than or equal to 80 percent of the initial capacity when 100 percent DOD discharges for 500 times).
In this embodiment, the high-frequency switching power rectifying module for electric power: two high-frequency switching power supply modules are used in parallel, and the standard of N +1 is met. The high-frequency switch rectifying module adopts an advanced LLC resonance soft switching technology, so that the efficiency is high; the APFC technology is adopted, so that the power factor is high; the cooling fan adopts a temperature combined current control mode, so that the noise is low, and the service life of the fan is long.
In this embodiment example, the power UPS module: the 5KVA power high-frequency UPS is adopted, and the double-conversion online zero-conversion function is achieved. The UPS is not provided with a backup battery independently, and shares a 220V30AH ternary lithium battery pack of the device. The direct current input and the alternating current (input and output) of the UPS are completely and electrically isolated, and the related requirements of the power industry are met.
In this embodiment example, the BMS management system: a BMS management system with one master and two slaves is adopted, and the realized functions are as follows:
1. the collection function is as follows: the voltage of each battery string is collected, the total current of the battery pack is collected by 1 way, and the temperature is collected by 18 ways at most.
2. And (4) protection function: support overcharge protection, overdischarge protection, short circuit protection (protection is carried out by adopting a fuse physical device, and the safety of a system is ensured by adopting a self-destruction mode of the device at the time of crisis), overcurrent protection and high-low temperature protection.
3. Communication: and the isolation 485 communication is mainly used for communicating with a display screen and a charger.
In this embodiment, the touch screen display and function setting of the touch monitor display screen: and a 7-inch color liquid crystal screen is adopted, so that the Chinese character is displayed completely, and the human-computer interface is attractive. The system has the advantages of monitoring various data of the whole system in a centralized manner, setting relevant parameters of the system and displaying system fault information, and has the functions of starting and stopping the rectifier module, equalizing the rectifier module, floating charging, testing the battery, setting the equalizing charge voltage, setting the floating charge voltage, setting the charge current limit, setting the battery maintenance equalizing charge period and controlling the current limit of the rectifier module. The UPS operation data and the system state are also displayed, and the related parameters of the UPS can be set.
The display screen display interface includes:
1. and (6) a main interface. And displaying the charging and discharging states of the battery, displaying the switching states of the charger and the inverter, controlling the on and off of the charger and the inverter, prohibiting charging and shutting down the whole system. The main interface is provided with 4 software switches of ' charging switch ', ' inversion switch ', ' full prohibition ', ' system shutdown
2. A battery monitoring interface. The battery related information and the battery alarm information can be displayed, and the battery related information and the battery alarm information comprise battery pack voltage, battery pack current, maximum voltage and minimum voltage of a single battery, battery temperature, residual capacity and residual current percentage. And early warning information such as overvoltage, undervoltage, charging overcurrent, charging and discharging overtemperature and the like of the battery is displayed. The various types of corresponding information are in a normal state when indicated by "0" and in an abnormal state when indicated by "1".
3. An inverter monitoring interface. The information related to the inverter can be displayed and comprises output voltage, output current, output frequency, inversion voltage, battery input voltage and the like.
4. Charger control interface. The information related to the two chargers can be displayed and comprises output voltage, output current, offline voltage, current limiting percentage and the like.
5. Cell voltage monitoring interface. The real-time voltage of 60 strings of single batteries can be displayed, and the user can see the actual voltage condition of each string of batteries.
6. And logging in a user interface. And the relevant parameter setting can be carried out on the parameter setting interface only after the password is input and the login is successful.
7. And (6) a parameter setting interface. The interface can read and set relevant parameters of the charger, and the read parameters can be directly pressed by a read parameter button.
During specific work, the charging strategy is as follows: and after the charger is connected with an alternating current power supply, after the BMS is electrified and works for self-checking, if the BMS is in normal communication with the charger, the charging relay KT2 is closed, and the charger starts to charge. When the voltage of the single battery is more than or equal to 4.185V and the current is less than 200mA, the SOC is set to be 100%, the charger continues to keep the charging state, when the battery has overvoltage protection, the charging relay KT2 is disconnected, the charging is stopped, when the voltage of the single battery is lower than 4.1V, the charging relay KT2 is closed again, and the battery enters the charging state again.
In the embodiment of the present disclosure, the 1-way ac power input, the 3-way ac power output, and the 3-way dc power output are connected by the aviation plug, and are respectively controlled by the corresponding air circuit breaker.
Example II
The embodiment of the specification provides a monitoring method for a portable integrated uninterruptible alternating current/direct current power supply, which is realized by the following technical scheme:
the method comprises the following steps:
during specific work, the charging strategy is as follows: and after the charger is connected with an alternating current power supply, after the BMS is electrified and works for self-checking, if the BMS is in normal communication with the charger, the charging relay KT2 is closed, and the charger starts to charge. When the voltage of the single battery is more than or equal to 4.185V and the current is less than 200mA, the SOC is set to be 100%, the charger continues to keep the charging state, when the battery has overvoltage protection, the charging relay KT2 is disconnected, the charging is stopped, when the voltage of the single battery is lower than 4.1V, the charging relay KT2 is closed again, and the battery enters the charging state again.
An alternating current power supply is connected behind the charger;
the relevant display screen display interface of control such as 24V switching power supply, BMS, observing and controling the screen includes:
be equipped with two physics button switches of "BMS is closed" and "BMS is opened" on the device front panel, can close battery output and display screen respectively.
The 'AC 220V input' air breaker is used for controlling the charger and the UPS alternating current input, and the charger charges the battery after the switch is turned on under the condition that the BMS switch is turned on; the function of the UPS direct current input air circuit breaker is that when the BMS switch is opened, the battery of the switch is opened to supply power to the UPS; in addition, a 3-way AC220V output air breaker, a 3-way DC220V output air breaker are arranged on the front panel, and a 6-way aviation plug corresponding to the 6-way air breaker is arranged at the lower part of the back of the device and serves as an output connector.
The main interface of the touch screen displays the charging and discharging states of the battery, the states of the charger and the inverter switch, and four soft switches are used for controlling the charger and the inverter switch and forbidding charging and shutting down the whole system. "charging switch": the system can judge the switch state before shutdown when starting up, if the switch is closed before shutdown, the system is in the closed state or the closed state, and if the switch is opened before shutdown, the system is in the opened state or the opened state. The switch is used for displaying the state of the charger and controlling the on-off of the charger. "inverter switch": each time the system is turned on, the switch is open if the inverter is on and closed if the inverter is off. The switch can be used to turn on or off the inverter after the system is powered on. "charge and discharge forbidding": the battery pack can be charged and discharged when the battery pack is opened, and the battery pack cannot be charged and discharged after the battery pack is closed. (the switch controls the charging and discharging relay to be opened and closed). "system shutdown": the entire battery system is turned off, and the function is as BMS off button.
A battery monitoring interface. The battery related information and the battery alarm information can be displayed, and the battery related information and the battery alarm information comprise battery pack voltage, battery pack current, maximum voltage and minimum voltage of a single battery, battery temperature, residual capacity and residual current percentage. And early warning information such as overvoltage, undervoltage, charging overcurrent, charging and discharging overtemperature and the like of the battery is displayed. The various types of corresponding information are in a normal state when indicated by "0" and in an abnormal state when indicated by "1".
An inverter monitoring interface. The information related to the inverter can be displayed and comprises output voltage, output current, output frequency, inversion voltage, battery input voltage and the like.
The monitoring interface of the chargers can display relevant information of the two chargers, including output voltage, output current, offline voltage, current limiting percentage and other information.
Cell voltage monitoring interface. The real-time voltage of 60 strings of single batteries can be displayed, and the user can see the actual voltage condition of each string of batteries.
The user logging interface is used for inputting a password to log in successfully, and then the parameter setting interface can be used for carrying out relevant parameter setting.
The parameter setting interface can read and set relevant parameters of the charger, and the parameter reading button can be directly pressed to read the parameters.
When the system is started, the parameters of the charger are initialized, the output voltage is set to 252V, and the current percentage is set to 50%. The charger parameters changed by the method are effective only for the change, and the system can be restored to default set values after being restarted.
According to the further technical scheme, when the power UPS works in an on-line mode when alternating current is input, the DC/DC converter at the direct current end is in a shutdown state; when the input alternating current is abnormal, the DC/DC converter at the direct current end is started, zero switching between alternating current and direct current power supply is realized, and meanwhile standby loss of the direct current end is reduced.
It is to be understood that throughout the description of the present specification, reference to the term "one embodiment", "another embodiment", "other embodiments", or "first through nth embodiments", etc., is intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, or materials described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (8)
1. The incessant alternating current-direct current power supply of lightweight integration, characterized by includes:
the system comprises a lithium battery pack, a high-frequency switch rectifying module for electric power, an electric power UPS module and a monitoring system;
the high-frequency switch rectifying module for the electric power takes an external alternating current 220V power supply as an input power supply, and is controlled by an air circuit breaker, and the lithium battery pack and the direct current output of the high-frequency switch rectifying module for the electric power are connected in parallel to realize uninterrupted direct current 220V output;
a circuit formed by connecting the auxiliary contact of a KT2 charging relay and a diode in parallel, a circuit formed by connecting the auxiliary contact of a KT3 discharging relay and a diode in parallel and a protective tube are connected in series on a '+' loop connected with the high-frequency switch rectifying module and the storage battery; and the "+" loop is provided with a Hall element;
the external AC220V power supply and the lithium battery pack are connected with an input power UPS module, an air circuit breaker is respectively arranged at the AC/DC input ends for control, and the power UPS module can realize 220V uninterrupted AC output;
the input end of the uninterrupted DC output loop is respectively connected with the power UPS module and the high-frequency switch rectifying module for power;
the monitoring system is connected to the battery management system BMS, the touch display screen, the high-frequency switch rectifying module for electric power and the electric power UPS module respectively, the battery management system is connected with the lithium battery pack, and the monitoring system monitors the working states of the lithium battery pack, the high-frequency switch rectifying module for electric power and the electric power UPS module.
2. The portable integrated uninterruptible alternating current/direct current power supply as claimed in claim 1, wherein the lithium battery pack, the high-frequency power switch rectifier module, the power UPS module and the monitoring system are integrated in a box.
3. The portable integrated uninterruptible alternating current/direct current power supply according to claim 1, wherein the high-frequency switching rectifier module for electric power is formed by connecting two high-frequency switching power supply modules in parallel.
4. The portable integrated uninterruptible ac/dc power supply as claimed in claim 1, wherein the power UPS module uses a 5kVA power high-frequency UPS, a 220V lithium battery pack as a dc input power source, and an external commercial power source as an ac input power source, thereby realizing an uninterruptible 220V rated ac output.
5. The portable integrated uninterruptible alternating current/direct current power supply according to claim 1, wherein the monitoring system comprises a battery management system BMS, a touch display screen;
BMS adopts one owner two to gather the mode of 3 BMS configurations altogether, and every BMS is responsible for battery temperature collection in real time 20 voltage of crossing the group battery, and charge-discharge current gathers, when there is overcharge, overdischarge, overflows high low temperature and short circuit in lithium cell group, and the work of control BMS management system is opened to control relay and is protected, realizes automatic control.
6. The portable integrated uninterruptible alternating current/direct current power supply as claimed in claim 5, wherein the communication connection mode of each component of the monitoring system is 485 communication connection mode.
7. The portable integrated uninterruptible ac/dc power supply as claimed in claim 1, wherein the uninterruptible dc output circuit is provided with 3 aviation plug connectors for external connection and 3 air circuit breakers for switching control, and a diode for preventing reverse charging is provided on the output "+" circuit.
8. The portable integrated uninterruptible alternating current/direct current power supply as claimed in claim 1, wherein the alternating current/direct current power supply can be used in parallel with multiple batteries, including a lithium battery pack and a lithium battery pack of a same type of device, to increase the capacity of the battery pack; or
The high-frequency switch rectification power supply module and the high-frequency switch rectification power supply module of the device with the same type are connected in parallel for use so as to increase the capacity of the high-frequency switch rectification power supply module; or
The power UPS module is used in parallel with the power UPS modules of the devices of the same type.
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| CN201921052944.8U CN210137209U (en) | 2019-07-05 | 2019-07-05 | Portable integrated uninterruption ac/dc power source |
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| CN201921052944.8U CN210137209U (en) | 2019-07-05 | 2019-07-05 | Portable integrated uninterruption ac/dc power source |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445243A (en) * | 2019-07-05 | 2019-11-12 | 国网山东省电力公司曲阜市供电公司 | The uninterrupted power of alterating and direct current of lightweight integration and method |
| CN111711264A (en) * | 2020-06-30 | 2020-09-25 | 四川长虹电源有限责任公司 | Aviation is with continuous uninterrupted power supply control box in full time |
| CN112152117A (en) * | 2020-09-27 | 2020-12-29 | 上海芙亚能源科技有限公司 | High distributed DC power supply of security |
| US11462917B1 (en) | 2021-12-10 | 2022-10-04 | NDSL, Inc. | Methods, systems, and devices for maintenance and optimization of battery cabinets |
| US11689048B1 (en) | 2021-12-10 | 2023-06-27 | NDSL, Inc. | Methods, systems, and devices for maintenance and optimization of battery cabinets |
-
2019
- 2019-07-05 CN CN201921052944.8U patent/CN210137209U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445243A (en) * | 2019-07-05 | 2019-11-12 | 国网山东省电力公司曲阜市供电公司 | The uninterrupted power of alterating and direct current of lightweight integration and method |
| CN111711264A (en) * | 2020-06-30 | 2020-09-25 | 四川长虹电源有限责任公司 | Aviation is with continuous uninterrupted power supply control box in full time |
| CN112152117A (en) * | 2020-09-27 | 2020-12-29 | 上海芙亚能源科技有限公司 | High distributed DC power supply of security |
| US11462917B1 (en) | 2021-12-10 | 2022-10-04 | NDSL, Inc. | Methods, systems, and devices for maintenance and optimization of battery cabinets |
| US11689048B1 (en) | 2021-12-10 | 2023-06-27 | NDSL, Inc. | Methods, systems, and devices for maintenance and optimization of battery cabinets |
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