CN106532810A - Uninterruptible power supply control circuit and video camera comprising same - Google Patents
Uninterruptible power supply control circuit and video camera comprising same Download PDFInfo
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- CN106532810A CN106532810A CN201610961329.3A CN201610961329A CN106532810A CN 106532810 A CN106532810 A CN 106532810A CN 201610961329 A CN201610961329 A CN 201610961329A CN 106532810 A CN106532810 A CN 106532810A
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- module
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- charging
- control circuit
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Classifications
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- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides an uninterruptible power supply control circuit and a video camera comprising the same, and belongs to the field of power supply. The uninterruptible power supply control circuit comprises a power input interface, a power output interface, a battery pack, a charging management module, a charging output conversion module and a power supply detection module; the power input interface is connected with the charging management module and the power output interface separately; the charging management module is connected with the battery pack through the charging output conversion module; the power supply detection module is connected with the power input interface and the charging output conversion module separately; the charging management module comprises a plurality of parallel charging branches; each charging branch is connected with one section of battery in the battery pack; and the batteries in the battery pack are output in series. By adopting parallel charging and series discharging, a charging circuit is simplified, a discharging circuit is simplified, the discharging efficiency is improved, the power supply time and the life of lithium batteries are prolonged and miniaturization of a product is facilitated.
Description
Technical field
The present invention relates to a kind of power supply, more particularly to a kind of uninterrupted power source control circuit, further relate to a kind of comprising the electricity
The video camera on road.
Background technology
At present, video monitoring is almost ubiquitous, is that people have safely provided more preferable guarantee, greatly reduces
The generation of various cases, also greatly improves the detection rate and efficiency of various cases.Video monitoring is also an important punishment
Detect means, monitor video video recording be it is a kind of highly effective, effectively, also very intuitively evidence.
The WIFI video cameras of current monitoring field all adopt external dc 12V powering modes, power single, having a power failure or
Person is that monitoring system will fail because of no supply of electric power in the case that power supply is destroyed.Particularly in electric power by people
In the case of destruction, power supply just seems more important.
Monitoring device to generally be destroyed to be not easy, destruction electric power is much easier, when offender is before crime is implemented,
The electric power of monitoring system is first destroyed, just implements crime after video monitoring system failure, then video monitoring system just cannot
Take offender and its implement crime picture, that in this case, video monitoring system is equal to perform practically no function.
The figure and features feature lock to suspect is realized surveillance video in many cases, is required at present
Fixed, crime number, process of commission of crime record, after implementing crime, flee from direction-locking tracking etc..If monitoring system failure conditions
The crime of lower generation, these features just have no way of extracting, and the difficulty investigated into a case just is well imagined.
Often there are some cases in Jing now, after case occurs, when Public Security Organss transfer monitoring video, just find,
Offender's no video record in this time period for implementing crime.Just be because offender implement crime when
Wait, destroy supply of electric power first, such as operate a switch, trimming etc., after waiting enforcement to finish crime, connects supply of electric power again.It is this
In the case of, cannot just obtain effective process of commission of crime video frames.
Under this background, it is necessary to which monitoring system itself can provide electric power, the feelings destroyed in externally fed are realized
Under condition, moreover it is possible to which the supply of electric power of certain hour is provided, the monitoring video of certain hour is realized, and user is informed in warning.
The content of the invention
To solve the problems of the prior art, the present invention provides a kind of uninterrupted power source control circuit, additionally provides one kind
Video camera comprising the circuit.
Uninterrupted power source control circuit of the present invention includes power input interface, power output interface, set of cells, Charge Management
Module, the output modular converter that charges, power supply detection module, wherein, the outfan of the power input interface respectively with charging valve
Reason module input is connected with power output interface input, and the outfan of the charge management module is by the output of charging
Modular converter is connected with set of cells, and the power supply detection module exports modulus of conversion with power input interface outfan and charging respectively
Block input is connected, wherein, the charge management module includes multiple charging paths in parallel, per charging paths all the way respectively with
Wherein batteries in set of cells are connected, the battery series connection output in the set of cells, the outfan of the set of cells and institute
State power output interface input to be connected.The present invention adopts charged in parallel, discharged in series simplify charging circuit, it is not necessary to
Charging balanced circuit, simplifies discharge circuit, improves the efficiency of electric discharge, increases power-on time and the life-span of lithium battery, beneficial to product
Miniaturization.
The present invention is further improved, and is additionally provided with output between the set of cells outfan and power output interface input
Disconnecting switch, the output disconnecting switch are connected with the output modular converter outfan that charges.
The present invention is further improved, and is additionally provided with discharge prevention mould between the output disconnecting switch and set of cells outfan
Block.
The present invention is further improved, it is described output disconnecting switch be MOS switch pipe, the discharge prevention module using than
Compared with device unit.
The present invention is further improved, and the uninterrupted power source control circuit also includes energy-storage module, the energy-storage module
It is connected with power input interface and power supply detection module respectively.
The present invention is further improved, and the power supply detection module adopts audion and Zener diode combination generation to have
The control signal of voltage difference and time difference.
The present invention is further improved, and is provided between the power input interface outfan and charge management module input
Voltage regulating module.
The present invention is further improved, and is provided between the power input interface outfan and power output interface input
First isolation module, is provided with the second isolation module between the power input interface outfan and voltage regulating module input, realize
The isolation of externally fed and internal cell charging.
The present invention is further improved, and the charge management module includes charging isolated location and charhing unit, described to fill
Electric isolution unit is arranged between the voltage regulating module and charhing unit, prevents battery current from pouring in down a chimney.
Present invention also offers a kind of video camera comprising foregoing circuit, including video camera primary module, camera lens, infrared light board
And drive circuit board, WIFI module, the video camera primary module is connected with camera lens and WIFI module respectively, and the power input connects
Mouth connects external power source, and the power output interface includes the first output interface and the second output interface, first output interface
Power for video camera primary module, second output interface is that the infrared light board and drive circuit board are powered, the set of cells
Including three section 3.7V lithium batteries.
Compared with prior art, the invention has the beneficial effects as follows：The reliability of increase wireless supervisory control system, effectiveness, when
When external power source is normal, internal set of cells is charged by charge management circuit, lithium electricity can be closed for power detection circuit
The external output power in pond.When externally fed is abnormal, power supply detection module will automatically cut off the charging current of set of cells
And be transformed into video camera primary module and power, enable the video camera continuous firing regular hour；For the set of cells of series connection is filled
Electricity, needs to adopt equalizaing charge, as video camera inner space is limited, needs to simplify circuit design, miniaturized circuit module, institute
Independent Charge Management is adopted to battery with the present invention, to cancel equalization charging circuit, miniaturized circuit module；Generally 2.4-4V
Voltage to boost to 12V, below 80%, the waste of power supply is very big for conversion efficiency, and in the video camera of miniaturization, space has
Limit, it is impossible to the volume of unlimited increase lithium battery, in order to improve the efficiency of power supply, the present invention is cancelled using set of cells series connection output
Booster circuit below, maximizes the efficiency of lithium battery.
Description of the drawings
Fig. 1 is uninterrupted power source control circuit structural representation of the present invention；
Fig. 2 is circuit diagram of the present invention；
Fig. 3 is voltage regulating module embodiment DC-DC reduction voltage circuit figure；
Fig. 4 is the one of subcircuits figure of charge management module；
Fig. 5 is power supply detection module and energy-storage module circuit diagram；
Fig. 6 is output disconnecting switch and discharge prevention module circuit diagram；
Fig. 7 is the output modular converter circuit diagram that charges；
Fig. 8 is camera structure schematic diagram.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is described in further details.
As shown in figure 1, uninterrupted power source control circuit of the present invention includes power input interface, power output interface, battery
Group, charge management module, the output modular converter that charges, power supply detection module, wherein, the outfan point of the power input interface
It is not connected with charge management module input and power output interface input, the outfan of the charge management module passes through institute
State charging output modular converter be connected with set of cells, it is described power detection module respectively with power input interface outfan and charging
Output modular converter input is connected, wherein, the charge management module includes multiple charging paths in parallel, every to charge all the way
Branch road is connected with the wherein batteries in set of cells respectively, the battery series connection output in the set of cells, the set of cells
Outfan is connected with the power output interface input.The present invention adopts charged in parallel, discharged in series simplify charging electricity
Road, it is not necessary to charging balanced circuit, simplifies discharge circuit, improves the efficiency of electric discharge, increases power-on time and the life-span of lithium battery,
Beneficial to the miniaturization of product.
As shown in Fig. 2 voltage regulating module is provided between this example power input interface outfan and charge management module input,
The voltage regulating module of this example is DC-DC voltage reduction modules, it is also possible to be set to booster circuit etc. as desired.The power input interface
The first isolation module, the power input interface outfan and pressure regulation mould are provided between outfan and power output interface input
The second isolation module is provided between block input, the isolation of externally fed and internal cell charging is realized.Described first every
A power diode is respectively adopted from module and the second isolation module, using its unilateral conduction, externally fed and inside is realized
The isolation of set of cells charging.
External power source is powered to whole circuit by power input interface, into after circuit inside, lead up to first every
Directly power to power output interface from module, in addition all the way respectively through the second isolation module, DC-DC voltage reduction modules, charging
Management module, then to battery-powered, when external power source is normal, by charge management module to internal set of cells
Charge, power supply detection module can close the external output power of set of cells；When externally fed is abnormal, detection module of powering
The charging current of set of cells will be automatically cut off and be transformed into power output interface and powered.
As shown in figure 3, being second isolation module and DC-DC of the present embodiment（DC-DC）Voltage reduction module circuit, be
Charge Management below and lithium cell charging provide stable 5V power supplys, wherein, JP1 is power input interface, the first isolation mode
Block adopt diode D1, the DC-DC voltage reduction modules include IC 1, electric capacity C1, electric capacity C2, electric capacity C5, electric capacity C6,
Electric capacity C7, electric capacity C8, electric capacity C15, diode D2, inductance L1, resistance R1, resistance R7, resistance R14, the IC 1
Pin 1 is connected with the negative pole of diode D2 by electric capacity C8, the diode D2 plus earths, and the IC 1 draws
Foot 2 is grounded, and the electric capacity C1 and electric capacity C5 is connected in parallel on integrated circuit pin 5, the pin 3 of the IC 1 respectively with electricity
Resistance R7 one end, resistance R14 in parallel are connected with electric capacity C7 one end, the resistance R7 other ends ground connection, the resistance R14 and electricity of parallel connection
Hold the C7 other ends to be connected with inductance L1 outfans, the pin 4 of the IC 1 is connected with resistance R1 and electric capacity C15 respectively,
The connection diode D1 negative poles of pin 5 of the resistance R1 other ends and IC 1, the electric capacity C15 other ends ground connection；Institute
The pin 6 for stating IC 1 exports 5V voltages by inductance L1, and the electric capacity C2 and electric capacity C6 is connected in parallel on voltage output end,
The electric capacity C2 and electric capacity C6 other ends ground connection.
As shown in figure 4, this example charge management module includes charging isolated location and charhing unit, the charging isolated location
It is arranged between the voltage regulating module and charhing unit, there are three same lithium cell charging branch roads, after being in the present embodiment
Each battery of the lithium battery group in face provides single charging current, as one embodiment of the charging paths of the present invention, this
The charging isolated location of example adopts power diode D11, charhing unit to adopt integrated chip IC2, outfan and battery JP5 phases
Even, it is that battery JP5 charges.Using the unilateral conduction of diode D11, the unified isolation power supply of charging paths is realized, lithium is prevented
The electric current of battery pours in down a chimney.
As shown in fig. 7, this example charges, output modular converter is used for charge independence and the string for realizing every batteries in set of cells
Connection output, wherein carrying out electronics switching using power MOSFET switch tube, greatly accelerates the speed for switching, realizes power supply not
Interruption output.
The switching switch of charging output modular converter adopts power MOSFET switch tube, using which at a high speed, low internal resistance, voltage
The characteristic of control type element, electronics switching, time uS level realize the turning of power supply almost without what is affected on the camara module of rear class
Change, do not result in restarting for video camera, crash etc., make the video camera can be with the normal work of continuous and effective.
According to external equipment required voltage and electric current, the quantity of the battery in battery pack of this example determines that the outside of this example sets
Standby is video camera, and the uninterrupted power source control circuit of this example is powered for video camera, and this example is using three section lithium battery groups into lithium battery
Group.In the charge management module of this example, the quantity of charging paths is identical with the quantity of battery in battery pack, tri- tunnels of Ye Wei, and three solely
Vertical charging paths are connected with the output modular converter that charges, and three independent charhing units are same by three charging isolated locations
DC-DC voltage reduction modules are connected, and realize the charge independence of three section lithium batteries.
As shown in figure 5, the power supply electrical measurement circuit of this example is connected with the output modular converter that charges, phase is produced for power detection circuit
The signal answered goes to control charging output module, realizes the automatic conversion of battery charging and discharging.
The power supply detection module adopts audion and Zener diode combination to produce the control with voltage difference and time difference
Signal processed.To realize that the switch mosfet pipe of charging output conversion circuit does not occur Simultaneous Switching state.Realize lithium battery simultaneously
What string was changed seamlessly transits.
The output modular converter that charges realizes the serioparallel exchange of set of cells, in order to avoid realizing the switch mosfet and reality of series connection
Existing in parallel switch mosfet synchronization generating state conversion, that is to say, that lithium battery also in series connection, and associated with
Switch mosfet is switched on lithium battery in other words, and, also in parallel connection, switch mosfet associated with string is switched on, both feelings
Under condition, switch mosfet pipe excessively stream can be all caused, therefore, the signal of detection module output of powering must have timing, make
Switch mosfet pipe occurs without situation about simultaneously turning on.In the case of outside dead electricity, it is to avoid power supply detection module is because of unregulated power
Supply and while output control signal, causes switch mosfet pipe situation about simultaneously turning on occur, so, in power supply detection module
The energy-storage module being made up of electric capacity C16, electric capacity C17, electric capacity C18 and electric capacity C19 is above increased, is made in dead electricity, internal electricity
Power drop has individual process, so as to avoid while output control signal, it is to avoid the detected voltage signal of power supply detection module is not sent out
Raw mutation, so as to the control signal for avoiding the switch mosfet pipe of follow-up charging output modular converter is undergone mutation, produces one
Voltage control signal with certain slope, it is to avoid the switch mosfet pipe of the output modular converter that charges occur simultaneously turning on or
The problem that person disconnects.
As shown in fig. 6, output disconnecting switch between this example set of cells outfan and power output interface input, is additionally provided with,
The output disconnecting switch is connected with the output modular converter outfan that charges.The output disconnecting switch is exported with set of cells
Discharge prevention module is additionally provided between end, the discharge prevention to set of cells is realized.
The output disconnecting switch being connected with the output modular converter that charges, realizes the voltage output on-off of lithium battery, exports
Disconnecting switch adopts power MOSFET type electronic switching tube, realizes high break-make speed, will not be to video camera main mould below
Block is impacted.
Output disconnecting switch is connected with power supply detection module and discharge prevention module, its power detection module and discharge prevention
The output signal composition one of module or logical signal, controlled output disconnecting switch, realize that externally fed is normal and battery discharge is complete
Bi Shi, output disconnecting switch disconnect, and protect lithium battery.Only in outside dead electricity and normal cell voltage, disconnecting switch is exported
Closure, provides continuous electricity for whole video camera.
Discharge prevention module realizes the discharge prevention of lithium battery, output disconnecting switch in the case of external power source is normal,
It is powered detection module to force to disconnect, now anyway, set of cells will not be connected, it is in the case that external power source fails, defeated
Go out disconnecting switch to connect immediately, power supply detection module exits control, transfers to discharge prevention module to carry out controlled output disconnecting switch.When
When cell voltage is detected less than zero dividing value, disconnect output disconnecting switch, battery no longer provides electric power, so as to protect lithium battery
Not by overdischarge.Used as one embodiment of the present of invention, this example is 2.5V in the marginal value of single battery, when voltage is less than 2.5V
When, lithium battery output is disconnected, protects lithium battery overdischarge not to occur and damage.
Due to particularity of the lithium battery electric discharge with slow electric discharge, and battery has certain internal resistance, and voltage is slow
Decline, the voltage exported when battery has load or disconnecting consumers is changed, with certain return difference, here using slow
Stagnant comparator, using the return difference characteristic of hysteresis comparator, realizes the discharge prevention detection of lithium battery, when preventing battery discharge, than
Occur to vibrate compared with device.
Lithium cell charging adopts single battery charge independence, and lithium battery electric discharge, using three batteries discharged in series, is whole
Video camera provides higher supply voltage, improves the power supplying efficiency of lithium battery.The serioparallel exchange of lithium battery, using power
MOSFET realizes that electrical switch switches, and with the switching time of uS levels, wifi video cameras really will not be impacted.
Additionally, the uninterrupted power source control circuit of this example also includes alarm module, the alarm module and the confession electric-examination
Survey module outfan to be connected.Power supply detection module also provides an alarm signal, connects external equipment, realizes the dead electricity of external equipment
Report to the police.
As shown in figure 8, present invention also offers a kind of video camera comprising foregoing circuit, including video camera primary module, mirror
Head, infrared light board and drive circuit board, WIFI module, the video camera primary module are connected with camera lens and WIFI module respectively, institute
State power input interface and connect external power source, the power output interface includes the first output interface and the second output interface, described
First output interface is powered for video camera primary module, and second output interface is that the infrared light board and drive circuit board are supplied
Electricity, the set of cells include three section 3.7V lithium batteries.Power output interface, while supporting the video camera primary module with WIFI module
And access infrared lamp.
After internally lithium battery is fully charged, operating current is extremely low for the present embodiment, the charging current of setting in 100mA or so,
During lithium cell charging, lithium battery hardly generates heat, and is beneficial to video camera work steady in a long-term.
In this example, the voltage of usual 2.4-4V will boost to 12V and provide power supply for video camera, conversion efficiency 80% with
Under, the waste of power supply is very big, in the video camera of miniaturization, limited space, it is impossible to the volume of unlimited increase lithium battery, in order to carry
The efficiency of high power supply, is connected into 11.1V outputs using three section lithium batteries in the present embodiment, cancels booster circuit below, maximum
Change the efficiency of lithium battery.
For the lithium cell charging of series connection, need to adopt equalizaing charge, as video camera inner space is limited, need to simplify
Circuit design, miniaturized circuit module, so independent Charge Management is adopted to battery, it is to cancel equalization charging circuit, small-sized
Change circuit module.
This example lithium battery adopts single-unit charge independence, the work of series-fed pattern, and is made using high speed switch mosfet pipe
For switch switching, it is ensured that whole video camera will not occur to crash, and restart, the phenomenon such as image flicker.
The present invention solves video monitoring system in use, runs into power failure or cable is disliked by lawless person
In the case that meaning is destroyed, continue to provide the supply of electric power of certain hour, make surveillance video continue normal operation, and image
Machine do not need between WIFI module, and videocorder cable connection by arranging, using wireless WIFI connection modes, even if illegal point
Son is turned off electric brake or destroys the power supply adaptor of video camera or cut off the power line of video camera, and video camera still can be just
Often work.Every act and every move to offender, all without being stealthy.It videoed full machine to have recorded, and warp-wise user sends out
Alarm signal is sent, at this time, user just can be in long-range checking monitoring, and judgement is to have a power failure or artificial destruction, so as to report
110。
The specific embodiment of the above is the better embodiment of the present invention, not limits the concrete of the present invention with this
Practical range, the scope of the present invention include being not limited to this specific embodiment, all equal according to the equivalence changes made of the invention
Within the scope of the present invention.
Claims (10)
1. a kind of uninterrupted power source control circuit, it is characterised in that：Including power input interface, power output interface, set of cells,
Charge management module, the output modular converter that charges, power supply detection module, wherein, the outfan difference of the power input interface
It is connected with charge management module input and power output interface input, the outfan of the charge management module is by described
The output modular converter that charges is connected with set of cells, and the power supply detection module is defeated with power input interface outfan and charging respectively
Go out modular converter input to be connected, wherein, the charge management module includes multiple charging paths in parallel, per charging all the way
Road is connected with the wherein batteries in set of cells respectively, the series connection output of battery in the set of cells, the set of cells it is defeated
Go out end to be connected with the power output interface input.
2. uninterrupted power source control circuit according to claim 1, it is characterised in that：The set of cells outfan and power supply
Output disconnecting switch is additionally provided between output interface input, the output disconnecting switch is defeated with the output modular converter that charges
Go out end to be connected.
3. uninterrupted power source control circuit according to claim 2, it is characterised in that：The output disconnecting switch and battery
Discharge prevention module is additionally provided between group outfan.
4. uninterrupted power source control circuit according to claim 3, it is characterised in that：The output disconnecting switch is MOS
Switching tube, the discharge prevention module adopt comparator unit.
5. the uninterrupted power source control circuit according to any one of claim 1-4, it is characterised in that：The uninterrupted power source
Control circuit also includes energy-storage module, and the energy-storage module is connected with power input interface and power supply detection module respectively.
6. uninterrupted power source control circuit according to claim 5, it is characterised in that：The power supply detection module adopts three
Pole pipe and Zener diode combination produce the control signal with voltage difference and time difference.
7. the uninterrupted power source control circuit according to any one of claim 1-4, it is characterised in that：The power input connects
Voltage regulating module is provided between mouth outfan and charge management module input.
8. uninterrupted power source control circuit according to claim 7, it is characterised in that：The power input interface outfan
The first isolation module, the power input interface outfan and voltage regulating module input are provided with and power output interface input between
The second isolation module is provided between end.
9. uninterrupted power source control circuit according to claim 8, it is characterised in that：The charge management module includes filling
Electric isolution unit and charhing unit, the charging isolated location are arranged between the voltage regulating module and charhing unit.
10. a kind of video camera comprising uninterrupted power source control circuit described in any one of claim 1-9, including video camera main mould
Block, camera lens, infrared light board and drive circuit board, WIFI module, the video camera primary module respectively with camera lens and WIFI module phase
Even, it is characterised in that：The power input interface connects external power source, and the power output interface includes the first output interface and
Two output interfaces, first output interface are powered for video camera primary module, and second output interface is the infrared light board
And drive circuit board is powered, the set of cells includes three section 3.7V lithium batteries.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610961329.3A CN106532810A (en) | 2016-10-28 | 2016-10-28 | Uninterruptible power supply control circuit and video camera comprising same |
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| CN201610961329.3A CN106532810A (en) | 2016-10-28 | 2016-10-28 | Uninterruptible power supply control circuit and video camera comprising same |
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| CN107863816A (en) * | 2017-11-16 | 2018-03-30 | 绵阳市建诚电子有限公司 | A kind of SCM Based projector equipment |
| CN111654675A (en) * | 2020-06-08 | 2020-09-11 | 深圳市华宝电子科技有限公司 | Vehicle-mounted video monitoring processing system and method and vehicle-mounted video monitoring system |
| WO2021103101A1 (en) * | 2019-11-29 | 2021-06-03 | 苏州贝昂科技有限公司 | Power supply method for double-circuit power supply device |
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| EP2501016A2 (en) * | 2011-03-18 | 2012-09-19 | Samya Technology Co., Ltd. | Integrated battery charger |
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| CN205584322U (en) * | 2016-01-26 | 2016-09-14 | 深圳市粤创高科技术有限公司 | Take internet protocol camera of LTE communication and WIFI focus |
| CN206272262U (en) * | 2016-10-28 | 2017-06-20 | 深圳市劲松安防科技有限公司 | A kind of uninterrupted power source controls circuit and the video camera containing the circuit |
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| WO2021103101A1 (en) * | 2019-11-29 | 2021-06-03 | 苏州贝昂科技有限公司 | Power supply method for double-circuit power supply device |
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