CN106816951A - A kind of seamless automatic battery switching circuit - Google Patents
A kind of seamless automatic battery switching circuit Download PDFInfo
- Publication number
- CN106816951A CN106816951A CN201610902037.2A CN201610902037A CN106816951A CN 106816951 A CN106816951 A CN 106816951A CN 201610902037 A CN201610902037 A CN 201610902037A CN 106816951 A CN106816951 A CN 106816951A
- Authority
- CN
- China
- Prior art keywords
- power supply
- mcu
- fet
- switch chip
- 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
-
- 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
- H02J7/36—Arrangements using end-cell switching
-
- 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
Abstract
The present invention relates to power supply switching field, more particularly to a kind of seamless automatic battery switching circuit, the present invention is adopted the following technical scheme that：Including major cell voltage detecting circuit, MCU, main power supply circuit and stand-by power supply circuit；Major cell voltage detecting circuit is connected to MCU, and main power supply circuit and the respective control circuit of stand-by power supply circuit are connected to MCU, by MCU controls main and stand-by power supply circuit unlatching and closing；The advantage of the invention is that：It is automatic by power switching to standby alkaline battery when lithium battery does not have electricity soon；Whole switching power supply process is seamless.
Description
Technical field：
The present invention relates to the hardware realization of integrated circuit, more particularly to a kind of seamless automatic battery switching circuit.
Background technology：
Present chargeable lithium cell product can be used instead standby often with standby alkaline battery electric power system when lithium battery is low electric
Alkalescence continue power, but the switching of this battery be frequently not automatic, it is necessary to staff operate, even automatically,
Nor seamless switching, system just switches supplying cell and restarts system after need to being automatically switched off, and based on this, is badly in need of one kind seamless certainly
Dynamic battery switching circuit.
The content of the invention：
It is an object of the invention to provide a kind of seamless automatic battery switching circuit.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that：Including major cell voltage detecting circuit, MCU, master
Want power supply circuit and stand-by power supply circuit；Major cell voltage detecting circuit is connected to MCU, and the information of voltage of major cell is passed
MCU is given, main power supply circuit and the respective control circuit of stand-by power supply circuit are connected to MCU, electricity of the MCU according to major cell
The control of pressure information main and stand-by power supply circuit unlatching and closing.
Further, the major cell voltage detecting circuit includes the first divider resistance and the second divider resistance, first
Divider resistance one end is connected to the chargeable lithium cell positive pole in main power supply circuit, and the first divider resistance other end concatenates
The concatenation point of two divider resistances, the other end ground connection of the second divider resistance, the first divider resistance and the second divider resistance is connected to
The ADC pins of MCU.
Further, described main power supply circuit includes chargeable lithium cell, the first pull-up resistor, the first field-effect
Pipe, the first pull down resistor, first switch chip and the first protection diode；The chargeable lithium cell negative pole ground connection is chargeable
The positive pole of lithium battery is connected to the power input pin of first switch chip, and the first pull-up resistor is serially connected in chargeable lithium cell
Between positive pole and the enable pin of first switch chip, the enable pin of first switch chip is high level enable, first effect
Should the drain electrode of pipe be connected to the enable pin of first switch chip, the source ground of the first FET, the first FET
Grid is connected to the IO1 pins of MCU, and first pull down resistor one end is connected to the grid of the first FET, the first pull down resistor
The other end is grounded, and the grounding pin ground connection of first switch chip, the power supply output pin of first switch chip is connected to the first guarantor
The positive pole of diode is protected, the negative pole of the first protection diode is connected to the supply line of rear class system.
Further, described stand-by power supply circuit include two concatenation alkaline batteries, the second pull-up resistor, second
Effect pipe, the second pull down resistor, second switch chip and the second protection diode；The alkaline battery cathode ground connection, alkaline electro
The positive pole in pond is connected to the power input pin of second switch chip, and the enable pin of second switch chip is high level enable,
Second pull-up resistor is serially connected between the positive pole of chargeable lithium cell and the enable pin of second switch chip, the second FET
Drain electrode be connected to the enable pin of second switch chip, the source ground of the second FET, the grid of the second FET
The IO2 pins of MCU are connected to, second pull down resistor one end is connected to the grid of the second FET, and the second pull down resistor is another
End ground connection, the grounding pin ground connection of second switch chip, the power supply output pin of second switch chip is connected to the second protection two
The positive pole of level pipe, the negative pole of the second protection diode is connected to the supply line of rear class system.
Further to improve the stability of power supply, can be in first switch chip and the power input and electricity of second switch chip
Filter capacitor is added on the output pin of source.
The advantage of the invention is that：
1, the circuit can be automatic by power switching to standby alkaline battery when lithium battery does not have electricity soon, very intelligent, without many
Remaining manual operation；
2, the circuit can be more seamless operation when power supply is switched, and this system is not in powering-off state in whole process,
Ensure that the fluency of system.
Brief description of the drawings：
Accompanying drawing 1 is circuit block diagram of the invention；
Accompanying drawing 2 is reserve battery instruction sequencing of the invention；
Accompanying drawing 3 is major cell instruction sequencing of the invention.
Specific embodiment：
Embodiment 1：Reference picture 1, including major cell voltage detecting circuit, MCU, main power supply circuit and stand-by power supply circuit；
Major cell voltage detecting circuit is connected to MCU, sends the information of voltage of major cell to MCU, main power supply circuit and standby
MCU is connected to the respective control circuit of power supply circuit, MCU controls main and stand-by power supply according to the information of voltage of major cell
The unlatching and closing of circuit.
Referring to figs. 1 to Fig. 3, major cell voltage detecting circuit includes the first divider resistance R5 and the second divider resistance R6,
First divider resistance R5 one end is connected to the chargeable lithium cell positive pole in main power supply circuit, the first divider resistance R5 other ends
Concatenate the other end ground connection of the second divider resistance R6, the second divider resistance R6, the first divider resistance R5 and the second divider resistance
The concatenation point of R6 is connected to the ADC pins of MCU, and the resistance of the first divider resistance R5 and the second divider resistance R6 is identical；MCU is regularly
The voltage of ADC pins is monitored, when voltage is less than setting value, MCU judges that chargeable lithium cell is low electric situation, and MCU now leads to
Cross IO1 and IO2 and send reserve battery instruction；When it is higher than setting value that MCU monitors the magnitude of voltage of ADC pins, MCU now passes through
IO1 and IO2 send major cell instruction.
Main power supply circuit includes chargeable lithium cell, the first pull-up resistor R1, the first FET Q1, the first drop-down electricity
Resistance R2, first switch chip U1 and the first protection diode D1；The chargeable lithium cell negative pole ground connection, chargeable lithium cell
Positive pole is connected to the power input pin of first switch chip U1, and the enable pin of first switch chip U1 is high level enable,
First pull-up resistor R1 is serially connected between the enable pin of the positive pole of chargeable lithium cell and first switch chip U1, first effect
Should the drain electrode of pipe Q1 be connected to the enable pin of first switch chip U1, the source ground of the first FET Q1, first effect
Should the grid of pipe Q1 be connected to the IO1 pins of MCU, first pull down resistor R2 one end is connected to the grid of the first FET Q1,
The first pull down resistor R2 other ends are grounded, and the grounding pin ground connection of first switch chip U1, the power supply of first switch chip U1 is defeated
Go out the positive pole that pin is connected to the first protection diode D1, the negative pole of the first protection diode D1 is connected to the power supply of rear class system
Circuit.
Stand-by power supply circuit includes two alkaline battery, the second pull-up resistor R3, the second FET Q2, second of concatenation
Pull down resistor R4, second switch chip U2 and the second protection diode D2；The alkaline battery cathode ground connection, alkaline battery is just
Pole is connected to the power input pin of second switch chip U2, and the enable pin of second switch chip U2 is high level enable, the
Two pull-up resistor R3 are serially connected between the enable pin of the positive pole of chargeable lithium cell and second switch chip U2, the second field-effect
The drain electrode of pipe Q2 is connected to the enable pin of second switch chip U2, the source ground of the second FET Q2, the second field-effect
The grid of pipe Q2 is connected to the IO2 pins of MCU, and second pull down resistor R4 one end is connected to the grid of the second FET Q2, the
The two pull down resistor R4 other ends are grounded, the grounding pin ground connection of second switch chip U2, the power supply output of second switch chip U2
Pin is connected to the positive pole of the second protection diode D2, and the negative pole of the second protection diode D2 is connected to the supply lines of rear class system
Road.
When major cell instruction sends, IO1 pins become low level from high level, and the first FET Q1 becomes from conducting
Cut-off, the enable pin of first switch chip U1 becomes high level from low level, and first switch chip U1 becomes to open from closing,
Chargeable lithium cell is able to give rear class system power supply, between the 10ms to 100ms after the change of IO1 pin levels, IO2 pins electricity
Flat to be changed into high level from low level, the second FET Q2 becomes conducting from cut-off, the enable pin of second switch chip U2 from
High level becomes low level, and second switch chip U2 becomes to close from unlatching, and alkaline battery disconnects oneself confession to rear class system
Electricity, so as to realize that reserve battery power switching is powered into major cell, and system is not in powering-off state.
When reserve battery instruction sends, IO2 pins become low level from high level, and the second FET Q2 becomes from conducting
Cut-off, the enable pin of second switch chip U2 becomes high level from low level, and second switch chip U2 becomes to open from closing,
Alkaline battery is able to give rear class system power supply, IO2 pin levels change after 10ms to 100ms between, IO1 pin levels from
Low level is changed into high level, and the first FET Q1 becomes conducting from cut-off, and the enable pin of first switch chip U1 is electric from height
Flat to become low level, first switch chip U1 becomes to close from unlatching, and chargeable lithium cell disconnects oneself confession to rear class system
Electricity, so as to realize that major cell power switching is powered into reserve battery, and system is not in powering-off state.
Further to improve the power supply stability of the circuit, can be in first switch chip U1 and the electricity of second switch chip U2
Source is input into and filter capacitor is added on power supply output pin.
Certainly, better embodiment of the present invention is these are only, use scope of the invention is not limited with this, therefore, it is every
Equivalent change is made in the principle of the invention to should be included in the protection domain of invention.
Claims (4)
1. a kind of seamless automatic battery switching circuit, it is characterised in that：Including major cell voltage detecting circuit, MCU, mainly for
Circuit and stand-by power supply circuit；Major cell voltage detecting circuit is connected to MCU, main power supply circuit and stand-by power supply circuit
Respective control circuit is connected to MCU, by MCU controls main and stand-by power supply circuit unlatching and closing.
2. a kind of seamless automatic battery switching circuit according to claim 1, described major cell voltage detecting circuit
Including the first divider resistance（R5）With the second divider resistance（R6）, the first divider resistance（R5）One end is connected to main power supply circuit
In chargeable lithium cell positive pole, the first divider resistance（R5）The other end concatenates the second divider resistance（R6）, the second partial pressure electricity
Resistance（R6）The other end ground connection, the first divider resistance（R5）With the second divider resistance（R6）Concatenation point be connected to an ADC of MCU and draw
Pin.
3. a kind of seamless automatic battery switching circuit according to claim 1, described main power supply circuit includes filling
Electric lithium battery, the first pull-up resistor（R1）, the first FET（Q1）, the first pull down resistor（R2）, first switch chip（U1）
With the first protection diode（D1）；The chargeable lithium cell negative pole ground connection, the positive pole of chargeable lithium cell is connected to first and opens
Close chip（U1）Power input pin, the first pull-up resistor（R1）It is serially connected in the positive pole and first switch core of chargeable lithium cell
Piece（U1）Enable pin between, the first FET（Q1）Drain electrode be connected to first switch chip（U1）Enable pin,
First FET（Q1）Source ground, the first FET（Q1）Grid be connected to the IO1 pins of MCU, first is drop-down
Resistance（R2）One end is connected to the first FET（Q1）Grid, the first pull down resistor（R2）The other end is grounded, first switch
Chip（U1）Grounding pin ground connection, first switch chip（U1）Power supply output pin be connected to the first protection diode（D1）
Positive pole, the first protection diode（D1）Negative pole be connected to the supply line of rear class system.
4. a kind of seamless automatic battery switching circuit according to claim 3, described stand-by power supply circuit includes two
The alkaline battery of concatenation, the second pull-up resistor（R3）, the second FET（Q2）, the second pull down resistor（R4）, second switch core
Piece（U2）With the second protection diode（D2）；The alkaline battery cathode ground connection, the positive pole of alkaline battery is connected to second switch
Chip（U2）Power input pin, the second pull-up resistor（R3）It is serially connected in the positive pole and second switch chip of chargeable lithium cell
（U2）Enable pin between, the second FET（Q2）Drain electrode be connected to second switch chip（U2）Enable pin,
Two FETs（Q2）Source ground, the second FET（Q2）Grid be connected to the IO2 pins of MCU, the second drop-down electricity
Resistance（R4）One end is connected to the second FET（Q2）Grid, the second pull down resistor（Q4）The other end is grounded, second switch core
Piece（U2）Grounding pin ground connection, second switch chip（U2）Power supply output pin be connected to the second protection diode（D2）'s
Positive pole, the second protection diode（D2）Negative pole be connected to the supply line of rear class system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610902037.2A CN106816951A (en) | 2016-10-18 | 2016-10-18 | A kind of seamless automatic battery switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610902037.2A CN106816951A (en) | 2016-10-18 | 2016-10-18 | A kind of seamless automatic battery switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106816951A true CN106816951A (en) | 2017-06-09 |
Family
ID=59106731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610902037.2A Pending CN106816951A (en) | 2016-10-18 | 2016-10-18 | A kind of seamless automatic battery switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106816951A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425593A (en) * | 2017-08-09 | 2017-12-01 | 辽宁省肿瘤医院 | Multivoltage battery parallel circuit |
| CN107465257A (en) * | 2017-09-04 | 2017-12-12 | 大唐融合通信无锡有限公司 | A kind of main power source and stand-by power supply automatic switch-over circuit |
| CN112003367A (en) * | 2020-09-02 | 2020-11-27 | 合肥国轩高科动力能源有限公司 | Data backup circuit of internet multi-stage intelligent remote monitoring system |
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| CN205304393U (en) * | 2016-01-18 | 2016-06-08 | 天津市凯森特科技有限公司 | Little incessant stand -by power supply switching circuit of consumption |
| CN205544567U (en) * | 2016-02-23 | 2016-08-31 | 西安仓实电子科技有限公司 | External power and battery powered automatic switch -over circuit |
| CN106026358A (en) * | 2016-06-23 | 2016-10-12 | 京东方科技集团股份有限公司 | Automatic power supply switching apparatus and method, and power supply system |
-
2016
- 2016-10-18 CN CN201610902037.2A patent/CN106816951A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205304393U (en) * | 2016-01-18 | 2016-06-08 | 天津市凯森特科技有限公司 | Little incessant stand -by power supply switching circuit of consumption |
| CN205544567U (en) * | 2016-02-23 | 2016-08-31 | 西安仓实电子科技有限公司 | External power and battery powered automatic switch -over circuit |
| CN106026358A (en) * | 2016-06-23 | 2016-10-12 | 京东方科技集团股份有限公司 | Automatic power supply switching apparatus and method, and power supply system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425593A (en) * | 2017-08-09 | 2017-12-01 | 辽宁省肿瘤医院 | Multivoltage battery parallel circuit |
| CN107465257A (en) * | 2017-09-04 | 2017-12-12 | 大唐融合通信无锡有限公司 | A kind of main power source and stand-by power supply automatic switch-over circuit |
| CN107465257B (en) * | 2017-09-04 | 2024-02-13 | 大唐融合物联科技无锡有限公司 | Automatic switching circuit for main power supply and standby power supply |
| CN112003367A (en) * | 2020-09-02 | 2020-11-27 | 合肥国轩高科动力能源有限公司 | Data backup circuit of internet multi-stage intelligent remote monitoring system |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170609 |
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