CN107959344A - A kind of intelligent integral backup power supply - Google Patents
A kind of intelligent integral backup power supply Download PDFInfo
- Publication number
- CN107959344A CN107959344A CN201710985821.9A CN201710985821A CN107959344A CN 107959344 A CN107959344 A CN 107959344A CN 201710985821 A CN201710985821 A CN 201710985821A CN 107959344 A CN107959344 A CN 107959344A
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- CN
- China
- Prior art keywords
- power supply
- semiconductor
- oxide
- metal
- circuit
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of intelligent integral backup power supply, including transformer, current rectifying and wave filtering circuit, DC/DC translation circuits, DC/AC translation circuits, battery case, DSP inverter control circuits, load power source, the system establishes perfect equipment protection mechanism, the output of any stand-alone device, input fault does not influence the normal work of whole system, system anti-electromagnetic interference capability is strong, pass through the access of more battery cases, meet the individual requirement of different load power apparatus power supply, can be to input overvoltage, input overcurrent, the quick diagnosis and fast positioning of the failures such as input short, the safety of power supply has been effectively ensured, and power supply is reliable, it is economical, also improve the stability for being powered equipment, reliability.
Description
Technical field
The present invention relates to uninterrupted power source technical field, is specifically a kind of intelligent integral backup power supply.
Background technology
At present, most of collieries are equipped with all kinds of numerals such as monitoring and controlling system, personnel location system, wireless communication system
Change mine system, system equipment distribution is wide, and arrangement is more dispersed, uses decentralized power-supply pattern mostly, accesses nearby in tunnel
Draining, lighting power supply system, poor reliability, power off time is grown after power failure, and backup power supply is inconvenient to extend, Wu Fabao
Digital Mine system reliability service is demonstrate,proved, influences Safety of Coal Mine Production.
The content of the invention
It is proposed in the above background technology to solve it is an object of the invention to provide a kind of intelligent integral backup power supply
Problem.
To achieve the above object, the present invention provides following technical solution：
A kind of intelligent integral backup power supply, including transformer, current rectifying and wave filtering circuit, DC/DC translation circuits, DC/AC conversion electricity
Road, battery case, DSP inverter control circuits, load power source, the transformer connect current rectifying and wave filtering circuit, the drop for alternating current
Pressure, rectification, filtering, the current rectifying and wave filtering circuit connect DC/DC translation circuits, and the DC/DC translation circuits connect battery case, use
Battery pack charges in battery case, DC/DC translation circuits connection DC/AC translation circuits, the DC/AC translation circuits connection
DSP inverter control circuits, AD conversion, PWM ripples for power supply produce, double-closed-loop control, and the connection connection of DC/AC translation circuits is negative
Carry power supply.
As the further scheme of the present invention：The battery case is provided with no less than 3 groups external connection battery casees, per Battery pack case
It is provided with and is no less than 5 groups of ferric phosphate lithium cells.
As the further scheme of the present invention：The DSP inverter control circuits include main circuit, drive circuit control signal
Unit, signal conversion unit, dsp controller, signal detection and level bias control unit, the main circuit and drive circuit control
Signal element processed is divided into four connections, and drive circuit control signal unit is divided into five connections with signal conversion unit, believes
Number converting unit is divided into five connections with dsp controller, and dsp controller is divided into signal detection and level bias control unit
Two connections, signal detection are divided into two connections with level bias control unit with main circuit.
As the further scheme of the present invention：The main circuit by battery pack, capacitance C1, polar capacitor C2, metal-oxide-semiconductor Q1,
Metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, inductance L1, capacitance C3 connections composition, the capacitance C1 is in parallel with polar capacitor C2, then with
Battery pack is in parallel, and the metal-oxide-semiconductor Q1 connects with metal-oxide-semiconductor Q3, then the circuit in parallel connected with metal-oxide-semiconductor Q2 with metal-oxide-semiconductor Q4, metal-oxide-semiconductor
Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, the grid of metal-oxide-semiconductor Q4 connect four line interfaces on drive circuit control signal unit, institute respectively
Inductance L1, capacitance C3 series connection are stated again in the parallel circuit of metal-oxide-semiconductor.
As the further scheme of the present invention：The dsp controller is provided with PWM controller, power drive unit and ADC
Unit, and be connected with five line interfaces of signal conversion unit, the PWM controller sends PWM1, PWM2, PWM3, PWM4 tetra-
Kind of PWM ripples, for timing, count compare, dead zone function, carrier wave occur, the ADC units be used to detecting in real time electric power host,
Battery case input voltage, input current, output voltage, output current state information.
As the further scheme of the present invention：The dsp controller be provided with overvoltage crowbar, current foldback circuit,
Warning circuit.
As the further scheme of the present invention：The load power source uses Flameproof and intrinsically safe power supply, the explosion-suppression and intrinsic safety
Power supply is provided with LCD panel, the LCD panel display content include intrinsic safety out-put supply whether normal information, battery
Status information, alternate current states information.
As the further scheme of the present invention：The intelligent integral backup power supply is provided with communication interface, the communication
Interface uses RS485 interfaces.
Compared with prior art, the beneficial effects of the invention are as follows：The system establishes perfect equipment protection mechanism, any
The output of platform stand-alone device, input fault do not influence the normal work of whole system, and system anti-electromagnetic interference capability is strong, passes through
The access of more battery cases, meet different load power apparatus power supply individual requirement, can to input overvoltage, input overcurrent,
The quick diagnosis and fast positioning of the failures such as input short, have been effectively ensured the safety of power supply, and it is reliable, economical to power, and also carries
High stability, the reliability for being powered equipment.
Brief description of the drawings
Fig. 1 is a kind of intelligent integral backup power supply operation principle schematic diagram；
Fig. 2 is DSP inverter control circuit figures.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
- 2 are please referred to Fig.1, a kind of intelligent integral backup power supply, including transformer 1, current rectifying and wave filtering circuit 2, DC/DC become
Circuit 3, DC/AC translation circuits 4, battery case 5, DSP inverter control circuits 6, load power source 7 are changed, the transformer 1 connects rectification
Filter circuit 2, for the decompression, rectification, filtering of alternating current, the current rectifying and wave filtering circuit 2 connects DC/DC translation circuits 3, described
DC/DC translation circuits 3 connect battery case 5, and for charging to battery pack in battery case, DC/DC translation circuits 3 connect DC/AC and become
Circuit 4 is changed, the DC/AC translation circuits 4 connect DSP inverter control circuits 6, and the AD conversion, PWM ripples for power supply produce, are double
Closed-loop control, the connection connection load power source 7 of DC/AC translation circuits 4, when power supply works normally, AC660/1140V is input to battery
Case, charges the battery pack in battery case, and in the presence of alternating current, AC660/1140V is input to transformer 1, after inverter circuit
Export as AC127V, power for load power source, when AC dump, the direct current of battery case 5 is output to DC/DC translation circuits 3,
By DC/AC translation circuits 4 and DSP inverter control circuits 6, the uninterrupted power supply of AC127V is completed.
The battery case 5 is provided with no less than 3 groups external connection battery casees, and Battery pack case is provided with no less than 5 groups ferric phosphates
Lithium battery.
The DSP inverter control circuits 6 include main circuit 61, drive circuit control signal unit 62, signal conversion unit
63rd, dsp controller 64, signal detection and level bias control unit 65, the main circuit 61 and drive circuit control signal list
Member 62 is divided into four connections, and drive circuit control signal unit 62 divides for five connections, signal with signal conversion unit 63
Converting unit 63 is divided for five connections, dsp controller 64 and signal detection and level bias control unit with dsp controller 64
65 points are two connections, and signal detection is divided to for two connections, signal inspection with level bias control unit 65 and main circuit 61
Survey the inspection for efficiently accomplishing the switching value information such as malfunction by the isolation optocoupler of level conversion with level bias control unit 65
Survey and isolate, prevent interference of the 127V high voltages to control circuit.
The main circuit 61 is by battery pack, capacitance C1, polar capacitor C2, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor
Q4, inductance L1, capacitance C3 connections composition, the capacitance C1 is in parallel with polar capacitor C2 then in parallel with battery pack, the metal-oxide-semiconductor
Q1 connects with metal-oxide-semiconductor Q3, then the circuit in parallel connected with metal-oxide-semiconductor Q2 with metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3,
The grid of metal-oxide-semiconductor Q4 connects four line interfaces on drive circuit control signal unit 62, the inductance L1, capacitance C3 string respectively
Connection is again in the parallel circuit of metal-oxide-semiconductor.
The dsp controller 64 is provided with PWM controller, power drive unit and ADC units, and and signal conversion unit
The connection of five line interfaces, the PWM controller sends tetra- kinds of PWM ripples of PWM1, PWM2, PWM3, PWM4, for timing, counts
Comparison, dead zone function, carrier wave occur, the effectively protection to whole power supply, the ADC units be used in real time detect electric power host,
Battery case input voltage, input current, output voltage, output current state information, when battery case input voltage is less than DC electricity
When pressing setting value, the output of AC127V is cut off, prevents battery pack overdischarge.
The dsp controller 64 is provided with overvoltage crowbar, current foldback circuit, warning circuit, when in power work
There is input phase failure, there is brownout in input overvoltage, output short-circuit, output overloading, power supply overheating fault situation or battery case,
Overtension, output electric discharge overcurrent when the abnormal operating state of system equipment, by the real-time detection of dsp controller 64,
Analysis, communication, alarm, complete the reliably working of whole intelligent integral backup power supply.
The load power source 7 uses Flameproof and intrinsically safe power supply, and the Flameproof and intrinsically safe power supply is provided with LCD panel, institute
State LCD panel display content include intrinsic safety out-put supply whether normal information, battery status information, alternate current states information.
The intelligent integral backup power supply is provided with communication interface, and the communication interface uses RS485 interfaces, convenient to be somebody's turn to do
Power supply interconnects with sorts of systems and transmission equipment.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (8)
1. a kind of intelligent integral backup power supply, it is characterised in that including transformer（1）, current rectifying and wave filtering circuit（2）, DC/DC become
Change circuit（3）, DC/AC translation circuits（4）, battery case（5）, DSP inverter control circuits（6）, load power source（7）, the transformation
Device（1）Connect current rectifying and wave filtering circuit（2）, for the decompression, rectification, filtering of alternating current, the current rectifying and wave filtering circuit（2）Connection
DC/DC translation circuits（3）, the DC/DC translation circuits（3）Connect battery case（5）, for charging to battery pack in battery case,
DC/DC translation circuits（3）Connect DC/AC translation circuits（4）, the DC/AC translation circuits（4）Connect DSP inverter control circuits
（6）, AD conversion, PWM ripples for power supply produce, double-closed-loop control, DC/AC translation circuits（4）Connection connection load power source
（7）.
A kind of 2. intelligent integral backup power supply according to claim 1, it is characterised in that the battery case（5）Set
Have and be no less than 3 groups of external connection battery casees, Battery pack case is provided with no less than 5 groups ferric phosphate lithium cells.
A kind of 3. intelligent integral backup power supply according to claim 1, it is characterised in that the DSP inversion controls electricity
Road（6）Including main circuit（61）, drive circuit control signal unit（62）, signal conversion unit（63）, dsp controller（64）、
Signal detection and level bias control unit（65）, the main circuit（61）With drive circuit control signal unit（62）It is divided into four
Connection, drive circuit control signal unit（62）With signal conversion unit（63）It is divided into five connections, signal conversion is single
Member（63）With dsp controller（64）It is divided into five connections, dsp controller（64）With signal detection and level bias control unit
（65）It is divided into two connections, signal detection and level bias control unit（65）With main circuit（61）It is divided into two connections.
A kind of 4. intelligent integral backup power supply according to claim 1, it is characterised in that the main circuit（61）By electricity
Pond group, capacitance C1, polar capacitor C2, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, inductance L1, capacitance C3 connections composition,
The capacitance C1 is in parallel with polar capacitor C2 then in parallel with battery pack, and the metal-oxide-semiconductor Q1 connects with metal-oxide-semiconductor Q3, then with metal-oxide-semiconductor
The circuit in parallel that Q2 connects with metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, the grid of metal-oxide-semiconductor Q4 connect driving electricity respectively
Road control signal unit（62）On four line interfaces, the inductance L1, capacitance C3 series connection are again in the parallel circuit of metal-oxide-semiconductor.
A kind of 5. intelligent integral backup power supply according to claim 1, it is characterised in that the dsp controller（64）
PWM controller, power drive unit and ADC units are provided with, and is connected with five line interfaces of signal conversion unit, it is described
PWM controller sends tetra- kinds of PWM ripples of PWM1, PWM2, PWM3, PWM4, and for timing, counting is compared, dead zone function, carrier wave are sent out
Raw, the ADC units are used to detect electric power host, battery case input voltage, input current, output voltage, output current in real time
State information.
A kind of 6. intelligent integral backup power supply according to claim 1, it is characterised in that the dsp controller（64）
It is provided with overvoltage crowbar, current foldback circuit, warning circuit.
A kind of 7. intelligent integral backup power supply according to claim 1, it is characterised in that the load power source（7）Adopt
With Flameproof and intrinsically safe power supply, the Flameproof and intrinsically safe power supply is provided with LCD panel, the LCD panel display content bag
Include intrinsic safety out-put supply whether normal information, battery status information, alternate current states information.
A kind of 8. intelligent integral backup power supply according to claim 1, it is characterised in that the intelligent integral standby
Power supply is provided with communication interface, and the communication interface uses RS485 interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710985821.9A CN107959344A (en) | 2017-10-20 | 2017-10-20 | A kind of intelligent integral backup power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710985821.9A CN107959344A (en) | 2017-10-20 | 2017-10-20 | A kind of intelligent integral backup power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107959344A true CN107959344A (en) | 2018-04-24 |
Family
ID=61963868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710985821.9A Pending CN107959344A (en) | 2017-10-20 | 2017-10-20 | A kind of intelligent integral backup power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107959344A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109041382A (en) * | 2018-08-28 | 2018-12-18 | 宁波颐栎庭园用品有限公司 | Two core wire RGB light adjusting circuit of outdoor low voltage |
| CN114464870A (en) * | 2022-02-24 | 2022-05-10 | 杭州传一科技有限公司 | Lithium battery device with fin heat radiation structure |
| CN114793014A (en) * | 2022-04-29 | 2022-07-26 | 中信重工开诚智能装备有限公司 | Mining explosion-proof frequency converter with emergency power supply and control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787140A (en) * | 2016-12-28 | 2017-05-31 | 双登集团股份有限公司 | AC/DC integrated backup power system |
-
2017
- 2017-10-20 CN CN201710985821.9A patent/CN107959344A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787140A (en) * | 2016-12-28 | 2017-05-31 | 双登集团股份有限公司 | AC/DC integrated backup power system |
Non-Patent Citations (1)
| Title |
|---|
| 陈湘源: "智能一体化后备电源研制", 《工矿自动化》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109041382A (en) * | 2018-08-28 | 2018-12-18 | 宁波颐栎庭园用品有限公司 | Two core wire RGB light adjusting circuit of outdoor low voltage |
| CN109041382B (en) * | 2018-08-28 | 2019-12-03 | 宁波颐栎庭园用品有限公司 | Two core wire RGB light adjusting circuit of outdoor low voltage |
| CN114464870A (en) * | 2022-02-24 | 2022-05-10 | 杭州传一科技有限公司 | Lithium battery device with fin heat radiation structure |
| CN114464870B (en) * | 2022-02-24 | 2023-09-12 | 深圳市天德普储能科技有限公司 | Lithium battery device with fin heat radiation structure |
| CN114793014A (en) * | 2022-04-29 | 2022-07-26 | 中信重工开诚智能装备有限公司 | Mining explosion-proof frequency converter with emergency power supply and control method |
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Application publication date: 20180424 |