CN211405477U - Communication base station direct current load intelligent management device - Google Patents
Communication base station direct current load intelligent management device Download PDFInfo
- Publication number
- CN211405477U CN211405477U CN202020186260.3U CN202020186260U CN211405477U CN 211405477 U CN211405477 U CN 211405477U CN 202020186260 U CN202020186260 U CN 202020186260U CN 211405477 U CN211405477 U CN 211405477U
- Authority
- CN
- China
- Prior art keywords
- direct current
- base station
- unit
- communication
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004891 communication Methods 0.000 title claims abstract description 97
- 238000002788 crimping Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 241000208682 Liquidambar Species 0.000 abstract 1
- 235000006552 Liquidambar styraciflua Nutrition 0.000 abstract 1
- 235000013399 edible fruits Nutrition 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 206010063385 Intellectualisation Diseases 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/40—Display of information, e.g. of data or controls
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model discloses a communication base station direct current load intelligent management device, including direct current distribution unit (1), the control unit (2) and communication unit (3), wherein direct current distribution unit (1) connection base station switch electrical power generating system and direct current load equipment, direct current distribution unit (1) has circuit on-off controller (11), the control end of circuit on-off controller (11) links to each other with the control unit (2), the control unit (2) are including micro-control unit (21) and execution unit (22), execution unit (22) link to each other with circuit on-off controller (11), micro-control unit (21) link to each other with communication unit (3), communication unit (3) and server platform communication. The utility model provides a communication base station direct current load power supply unit has every sweetgum fruit of road communication load equipment that accurate management and control inserts, effectively reduces advantages such as basic station energy consumption, stability height.
Description
Technical Field
The utility model relates to a communication field, concretely relates to power supply unit especially relates to a communication base station direct current load power supply unit.
Background
With the rapid development of communication networks, the base station communication equipment of operators runs on the network from the original single 2G equipment to the existing 2G, 3G, 4G and 5G equipment at the same time, the arrival of 5G and the continuous increase of mobile communication users increase the direct current load of the base station greatly, and the aims of reducing the energy consumption of the base station, saving energy and reducing emission are urgent needs of the operators.
At present, a communication base station switch power supply system has realized intellectualization, has a remote monitoring function and a remote control function, but does not realize intellectualization to the control of the accessed direct current load, and has the following current situations:
1. the traditional switching power supply also stays in a rough management mode of parallel connection of direct-current load busbars, primary and secondary power-off and manual on-off during idle switching;
2. the novel switching power supply only has a user-divided unified control function and cannot accurately control each path of communication load, namely each independent communication device;
3. the switching power supply with the intelligent control of the shunt load has the advantages of high newly increased/improved investment cost and high cutting difficulty, cannot share the existing storage battery pack of the base station with the existing switching power supply of the base station, and needs to be separately configured with a storage battery as an access load device for standby power supply;
4. the common air switch scheme of the intelligent air switch replacement switching power supply has high investment cost and large difficulty in air switch replacement construction in the switching power supply;
5. the switching power supply and the intelligent air switch scheme both need to be accessed to a base station dynamic loop monitoring system, do not have an autonomous communication function of directly communicating with a monitoring platform, and network safety cannot be guaranteed.
Therefore, research and design of an intelligent management device with low cost, low construction difficulty, intelligent control of each independent dc load (communication device), and remote communication and control functions is urgently needed in the prior art.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above problems, the present inventors have conducted intensive studies to design a dc load power supply device for a communication base station, which has the following characteristics:
1) the power distribution system can distribute power to multiple paths of direct current loads, each path is provided with a controllable direct current contactor device, and the power supply of each path of direct current load, namely each communication device, is accurately controlled;
2) a DC-48V power supply is taken from a base station switch power supply system and output in a shunt way to supply power for a direct current load, and the existing storage battery pack of the base station is utilized for standby power after power failure, so that an additional standby storage battery pack is not required;
3) and a 3G/4G wireless communication module is configured, data is uploaded to a designated server platform and a control instruction is received, and autonomous remote monitoring and control are realized.
Specifically, the dc load power supply device of the communication base station of the present invention comprises a dc distribution unit 1, a control unit 2 and a communication unit 3, wherein,
the direct current distribution unit 1 is connected with a base station switch power supply system and direct current load equipment, the direct current distribution unit 1 is provided with a circuit on-off controller 11, one end of the circuit on-off controller 11 is connected with the input end of the direct current distribution unit 1, the other end is connected with a non-crimping terminal of the output end,
the control end of the circuit on-off controller 11 is connected with the control unit 2, the control unit 2 comprises a micro-control unit 21 and a plurality of execution units 22, the execution units 22 are connected with the circuit on-off controller 11 to drive the circuit on-off controller 11, the micro-control unit 21 is connected with the execution units 22, the micro-control unit 21 is connected with the communication unit 3,
the communication unit 3 comprises an 3/4G universal data module which communicates with the server platform and remotely controls the micro control unit 21 through the server platform.
The input 13 of the dc distribution unit 1 has a 48V/300A connection.
The dc distribution unit 1 has multiple outputs 14, each output 14 having a 48V/50A crimp-free terminal.
The positive pole of the base station switching power supply is directly connected with the direct current load, and the negative pole of the base station switching power supply is connected with the wiring terminal at the input end of the direct current distribution unit 1.
The circuit on-off controller 11 is a direct current contactor.
An air switch 12 is further disposed on the dc distribution unit 1, and the air switch 12 is connected to a circuit on-off controller 11.
The execution unit 22 is a ULN2803A chip,
the micro control unit 21 is an STM32 series chip.
The 3/4G universal data module is a remote communication EC20 data module and is connected with the micro-control unit 21 by a UART serial port.
The communication base station direct current load intelligent management device is also provided with a display unit 4, and the display unit 4 is connected with a micro control unit 21.
The display unit 4 is provided with a display screen, and the display screen is connected with the micro control unit 21 in an SPI communication mode.
The utility model provides a communication base station direct current load power supply unit has following beneficial effect:
(1) according to the utility model provides a communication base station direct current load power supply unit, can accurate management and control each way communication load equipment of access;
(2) according to the utility model provides a communication base station direct current load power supply unit can selectively turn off some communication load equipment among them, under the prerequisite of guaranteeing communication service quality, reduces the base station energy consumption, reaches energy saving and emission reduction's purpose;
(3) according to the communication base station direct current load power supply device provided by the utility model, the equipment stability is high;
(4) according to the utility model provides a communication base station direct current load power supply unit can realize long-range intelligent management and control, unmanned on duty.
Drawings
Fig. 1 is a schematic diagram illustrating an overall structure of a dc load power supply device of a communication base station according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural diagram of a dc load power supply device of a communication base station according to a preferred embodiment of the present invention;
fig. 3 is a schematic diagram of an execution unit of a dc load power supply device of a communication base station according to a preferred embodiment of the present invention;
fig. 4 shows a schematic diagram of a dc contactor of a dc load power supply device of a communication base station according to a preferred embodiment of the present invention;
fig. 5 is a schematic diagram of a micro-control unit of a communication base station dc load power supply device according to a preferred embodiment of the present invention;
fig. 6 shows a schematic diagram of a dc load power supply unit of a communication base station according to a preferred embodiment of the present invention.
The reference numbers illustrate:
1-a direct current distribution unit;
11-circuit on-off controller;
12-an air switch;
13-an input terminal;
14-an output terminal;
2-a control unit;
21-a micro control unit;
22-an execution unit;
3-a communication unit;
4-a display unit;
41-display screen;
42-control keys;
43-rectifier bridge chip.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments. The features and advantages of the present invention will become more apparent from the description.
In which, although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
When the communication is idle at night, the communication equipment with zero telephone traffic or low telephone traffic is selectively closed according to the telephone traffic condition of the communication equipment, so that the energy consumption of the base station can be effectively reduced, and the communication equipment has a greater significance for 5G large-power consumption equipment in the future;
in addition, under the condition of coexistence of 2G/3G/4G/5G multiple systems, the coverage condition of communication signals in the area and the user condition are considered, partial system communication equipment in the area is selectively turned off, and the energy consumption of the base station can be greatly reduced on the premise of ensuring the communication quality.
When the commercial power is cut off, according to the battery endurance of the base station, the coverage condition of communication signals and the user condition in the area are considered, and part of communication equipment is selectively turned off, so that the energy consumption of the base station is reduced on the premise of ensuring the communication quality, and the electricity standby duration of the storage battery can be prolonged.
To this, the utility model discloses a to the intellectuality of direct current load, the management and control that becomes more meticulous, under the prerequisite of guaranteeing normal communication, through big data analysis, remote control turn-offs part "zero (low) traffic (flow)" communication equipment, reaches and reduces the basic station energy consumption, energy saving and emission reduction's purpose.
The utility model provides a communication base station direct current load intelligent management device, as shown in fig. 1, including direct current distribution unit 1, the control unit 2 and communication unit 3.
According to the utility model discloses, direct current distribution unit 1 is located between basic station switching power supply system and the direct current load equipment, whether switches on through direct current distribution unit 1 control direct current load equipment.
The base station switch power supply system provides power required by the communication base station direct current load intelligent management device and the direct current load equipment, the direct current distribution unit 1 is connected with the base station switch power supply system, and preferably, an input end of the direct current distribution unit 1 is provided with a 48V/300A wiring terminal to be connected with a base station switch power supply.
Further, the dc distribution unit 1 has multiple outputs, preferably no less than 9 outputs, and each output has a 48V/50A non-crimping terminal for connecting with dc load devices.
The direct current distribution unit 1 is provided with a circuit on-off controller 11, and the connection and disconnection between the base station switch power supply and the output end are controlled through the circuit on-off controller 11, so that the power supply and the power outage of direct current load equipment are realized.
In a preferred embodiment, the circuit on-off controller 11 has a plurality of circuits, as shown in fig. 2, the positive pole of the base station switching power supply is directly connected to the dc load, the negative pole of the base station switching power supply is connected to the terminal of the input end of the dc distribution unit 1, one end of the circuit on-off controller 11 is connected to the input end of the dc distribution unit 1, and the other end of the circuit on-off controller is connected to the non-crimp terminal of the output end, so as to realize on-off control of power supply to the dc load devices connected to the non-crimp terminal at different output ends.
Preferably, the on-off circuit controller 11 is a dc contactor, such as a Y90-SS series relay, as shown in fig. 4, which has the advantages of no impact starting current and suitability for frequent start-stop, so that the device is safer and more reliable.
In a more preferred embodiment, an air switch 12 is further provided on the dc distribution unit 1, and the air switch 12 is connected to the on/off circuit controller 11, so that the power supply to a load can be disconnected on site during maintenance and other situations.
According to the utility model discloses, circuit on-off controller 11's control end links to each other with the control unit 2, through the break-make of control unit 2 control circuit on-off controller 11.
The control unit 2 comprises a micro control unit 21 and a plurality of execution units 22.
The number of the execution units 22 is the same as that of the circuit on-off controllers 11, each execution unit 22 is connected to one circuit on-off controller 11, and is capable of driving the circuit on-off controller 11 to further implement on-off control of each path of dc load, and preferably, the execution unit 22 is an ULN2803A chip, as shown in fig. 3.
The micro-control unit 21 is connected to a plurality of execution units 22, and the function of driving the on-off controller 11 of different circuits to be on-off is achieved by controlling different execution units 22, in a preferred embodiment, the micro-control unit 21 is an STM32 series chip, and more preferably, an STM32F107VCT6, as shown in fig. 5.
In a preferred embodiment, the control unit 2 is further provided with a memory chip, and when an error occurs in the self-test of the device, the error information can be stored and automatically corrected, so that the stability of the device is improved.
In the present invention, the micro control unit 21 is connected to the communication unit 3, and can acquire the information transmitted by the communication unit 3, and then control the execution unit 22 according to the received information.
The communication unit 3 can communicate with the server platform to realize remote data exchange.
According to the utility model discloses, server platform can synthesize the relevant big data of basic station and carry out the analysis, combines basic station examination mechanism, and each direct current load equipment's switching in the nimble basic station of confirming to reduce the basic station energy consumption. In a preferred embodiment, a time logic instruction is preset in the micro control unit 21, and when the communication between the communication unit 3 and the server platform is interrupted and the interruption time reaches a preset time, the micro control unit 21 controls the execution unit 22 to resume supplying power to each dc load device.
In a preferred embodiment, the communication unit 3 includes an 3/4G universal data module, and a 3/4G internet of things card is used for realizing data communication, so as to connect to a specified server platform, and a dedicated network is preferably used, so that confidentiality of data transmission and control right is ensured, and a 3/4G universal data module is used, so that after 3G exits the market in the future, the device can be smoothly upgraded to 4G, and manpower is saved.
In a preferred embodiment, the 3/4G universal data module is a remote communication EC20 data module, and is connected to the micro control unit 21 by a UART serial port, so as to implement remote exchange and remote control of data.
According to the utility model, preferably, the communication base station direct current load intelligent management device also has a display unit 4, the display unit 4 is connected with a micro control unit 21, which can display different working states of the device,
preferably, the display unit 4 is provided with a display screen 41, and the display screen is connected with the micro control unit 21 in an SPI communication manner, so that real-time update of display contents is realized, the working state of the communication base station dc load intelligent management device is displayed, and data to be displayed is presented.
More preferably, the display screen 41 is a 12-pin interface display screen, as shown in fig. 6.
Furthermore, the display unit 4 further has a panel key, in the present invention, it is preferable to use SKHH-V tact switch as the control key, the panel key has a plurality of control keys 42, the control keys 42 are connected to a rectifier bridge chip 43, such as KBJ25, via a shaping circuit, and the circuit is connected to the micro control unit 21 via the rectifier bridge chip 43 as shown in fig. 6.
In a preferred embodiment, the number of the control keys is 4, and the control keys are respectively used as an "up" key, an "down" key, a "selection" key and a "return" key to set parameters of the communication base station direct current load intelligent management device.
Through control key 42 and display screen 41, parameter setting can be completed, so that the communication base station direct current load intelligent management device is more convenient to use on site, and more preferably, the communication base station direct current load intelligent management device also has a password verification function to ensure the safety of the device.
Preferably, the display unit 4 has a plurality of microswitches, which are connected with the micro control unit 21 through a common digital input interface, and support the input judgment of CMOS level for the identification of key-press action.
Preferably, the display unit 4 further has a plurality of led indicator lamps, and the led indicator lamps are connected to the micro control unit 21 through a common digital input interface to indicate different working states, and more preferably, two led indicator lamps are connected to pins 8 and 9 in the rectifier bridge chip 43 and further connected to the micro control unit 21.
Examples example 1
Adopt communication base station direct current load power supply unit supply power the management to communication base station, be provided with in the basic station xingqing and ericsson 4GRRU, communicate with communication base station direct current load power supply unit after through big data analysis, through the power-on and power-off condition of the different 4GRRU of communication base station direct current load power supply unit management, survey RRU operating condition at the scene.
After two hundred and forty times of power on-off control, both the Zhongxing and Ericsson RRU equipment can normally operate, and the direct-current load power supply device of the communication base station operates stably.
The power consumption of each set of 4G communication system of Zhongxing and Ericsson in the base station is measured and calculated, and the result is as follows:
a. ericsson: if the system is shut down for 5 hours under the condition of communication idle time or equipment 0 telephone traffic every day, the electricity consumption is saved by about 2.9036kWh, and the annual electricity consumption is saved by about 763 yuan/station site system;
b. zhongxing: if the system is turned off for 5 hours in the condition of communication idle time or equipment traffic 0 every day, the electricity consumption is saved by about 2.3546kWh, and the electricity fee is saved by about 619 yuan every year.
The present invention has been described above in connection with preferred embodiments, which are merely exemplary and illustrative. On this basis, can be right the utility model discloses carry out multiple replacement and improvement, these all fall into the utility model discloses a protection scope.
Claims (10)
1. An intelligent management device for the direct current load of a communication base station comprises a direct current distribution unit (1), a control unit (2) and a communication unit (3),
the direct current distribution unit (1) is connected with a base station switch power supply system and direct current load equipment, the direct current distribution unit (1) is provided with a circuit on-off controller (11), one end of the circuit on-off controller (11) is connected with an input end (13) of the direct current distribution unit (1), the other end of the circuit on-off controller is connected with a non-crimping terminal of an output end (14),
the control end of the circuit on-off controller (11) is connected with the control unit (2), the control unit (2) comprises a micro-control unit (21) and a plurality of execution units (22), the execution units (22) are connected with the circuit on-off controller (11) to drive the circuit on-off controller (11), the micro-control unit (21) is connected with the execution units (22),
the micro control unit (21) is connected with the communication unit (3),
the communication unit (3) comprises an 3/4G generic data module, which communicates with the server platform,
the communication base station direct current load intelligent management device is also provided with a display unit (4), the display unit (4) is connected with the micro control unit (21), the display unit (4) is provided with a display screen (41), the display screen is connected with the micro control unit (21) in an SPI communication mode,
the display unit (4) is also provided with a panel key, the panel key is provided with a plurality of control keys (42), the control keys (42) are connected with a rectifier bridge chip (43) through a shaping circuit, and the rectifier bridge chip (43) is connected with the micro-control unit (21).
2. The intelligent management device for DC load of communication base station according to claim 1,
the input end (13) of the direct current distribution unit (1) is provided with a 48V/300A terminal.
3. The intelligent management device for DC load of communication base station according to claim 1,
the direct current distribution unit (1) is provided with a plurality of output ends (14), and each output end (14) is provided with a 48V/50A pressure-free terminal.
4. The intelligent management device for DC load of communication base station according to claim 1,
the positive pole of the base station switching power supply is directly connected with the direct current load, and the negative pole of the base station switching power supply is connected with the wiring terminal at the input end of the direct current distribution unit (1).
5. The intelligent management device for DC load of communication base station according to claim 1,
the circuit on-off controller (11) is a direct current contactor.
6. The intelligent management device for DC load of communication base station according to claim 1,
an air switch (12) is further arranged on the direct current distribution unit (1), and the air switch (12) is connected with a circuit on-off controller (11).
7. The intelligent management device for DC load of communication base station according to claim 1,
the execution unit (22) is a ULN2803A chip,
the micro-control unit (21) is an STM32 series chip.
8. The intelligent management device for DC load of communication base station according to claim 1,
the 3/4G universal data module is a remote communication EC20 data module and is connected with the micro-control unit (21) by a UART serial port.
9. The intelligent management device for DC load of communication base station according to claim 1,
the display screen (41) is a 12-pin interface display screen.
10. The intelligent management device for DC load of communication base station according to claim 1,
the control keys (42) are SKHH-V tact switches and are provided with 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020186260.3U CN211405477U (en) | 2020-02-19 | 2020-02-19 | Communication base station direct current load intelligent management device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020186260.3U CN211405477U (en) | 2020-02-19 | 2020-02-19 | Communication base station direct current load intelligent management device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211405477U true CN211405477U (en) | 2020-09-01 |
Family
ID=72215032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020186260.3U Active CN211405477U (en) | 2020-02-19 | 2020-02-19 | Communication base station direct current load intelligent management device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211405477U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884197A (en) * | 2020-09-17 | 2020-11-03 | 金国卫 | Intelligent direct-current power distribution system |
| CN113346356A (en) * | 2021-07-02 | 2021-09-03 | 中天宽带技术有限公司 | Direct current power distribution equipment, communication base station power distribution system and intelligent breaking method |
-
2020
- 2020-02-19 CN CN202020186260.3U patent/CN211405477U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884197A (en) * | 2020-09-17 | 2020-11-03 | 金国卫 | Intelligent direct-current power distribution system |
| CN111884197B (en) * | 2020-09-17 | 2024-03-19 | 安徽省金屹电源科技有限公司 | Intelligent direct current power distribution system |
| CN113346356A (en) * | 2021-07-02 | 2021-09-03 | 中天宽带技术有限公司 | Direct current power distribution equipment, communication base station power distribution system and intelligent breaking method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107681672A (en) | The interactive approach of charging pile interactive terminal and charging pile access power network | |
| CN211405477U (en) | Communication base station direct current load intelligent management device | |
| CN113162237A (en) | Energy storage power station management system and method based on wireless communication and energy storage power station | |
| CN113725880B (en) | 5G intelligent power management system, power supply system and power supply method of stock base station | |
| CN211063416U (en) | Intelligent power management system for unattended weather station | |
| CN111030290B (en) | Intelligent power management system and method for semi-submersible unmanned submersible vehicle | |
| CN112799334A (en) | Sleep and wake-up control system of charging station and operation method thereof | |
| CN205846859U (en) | DC uninterrupted remote electric power system | |
| CN215990935U (en) | Frequency modulation is broadcast supervisory equipment fully based on thing networked control | |
| CN213585206U (en) | Base station power supply system and base station | |
| CN201294027Y (en) | Anti-theft alarm monitoring system for battery | |
| CN208571667U (en) | A kind of extension transformer substation communication equipment power-on time device | |
| CN208623389U (en) | A kind of one or two fusion feed line automatization terminals | |
| CN112260262B (en) | Intelligent power supply control and metering device and method for 5G base station | |
| CN202018591U (en) | Terminal controller for electricity using safety early warning system | |
| CN108964253A (en) | A kind of expansible off-line UPS power supply | |
| CN203574408U (en) | Battery pack application node and matrix battery management system | |
| CN113258474A (en) | Insert frame formula basic station energy sharing device | |
| CN220764140U (en) | Integrated electric energy distribution and monitoring device for automobile charging station | |
| CN113596974B (en) | Energy-saving device for chain type wireless ad hoc network equipment | |
| CN213367410U (en) | 5G differentiation is equipped with electrical equipment | |
| CN217692800U (en) | Base station differentiation distribution equipment based on cloud management and terminal autonomy | |
| CN215678503U (en) | Automatic switching device for three-phase four-wire electric energy meter | |
| CN213521400U (en) | Solar power supply equipment with field double-battery power supply | |
| CN221103050U (en) | Power distribution terminal power supply device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |