CN209860663U - Dual-power automatic switching circuit - Google Patents
Dual-power automatic switching circuit Download PDFInfo
- Publication number
- CN209860663U CN209860663U CN201920900691.9U CN201920900691U CN209860663U CN 209860663 U CN209860663 U CN 209860663U CN 201920900691 U CN201920900691 U CN 201920900691U CN 209860663 U CN209860663 U CN 209860663U
- Authority
- CN
- China
- Prior art keywords
- power supply
- battery
- coupled
- circuit
- external power
- 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
Abstract
The utility model discloses a dual-power automatic switching circuit, which relates to the field of power circuits of gas equipment and solves the problems that the dual-power circuit of the gas equipment is complex and needs to be manually switched to realize the selective switching of the power supply, the power supply is easily interrupted during the use and the operation is inconvenient, its technical scheme main points are including the main control unit that controls gas equipment, still including coupling in main control unit with the outer electricity power module that supplies power to main control unit through outer electricity, coupling in outer electricity power module whether have the detection circuitry of power supply in order to detect outer electricity, coupling in main control unit and respond to detection circuitry and carry out the battery power module of power supply through the battery in order to carry out when main control unit does not have outer electricity to supply with, the utility model discloses a can realize the automatic switch power input source by hardware, need not personnel and intervene, it is convenient to use, the power supply is stable.
Description
Technical Field
The utility model relates to a gas equipment power supply circuit, in particular to dual supply automatic switch-over circuit.
Background
The design of the gas equipment considers low power consumption, and because of the special position of the gas equipment, no commercial power is available in many occasions and the gas equipment can only be replaced by a battery. Therefore, the design of the product needs to consider the design of a dual power supply, external power and a battery. The existing common method is to design two circuits, one is battery powered, the other is external power powered, the circuits are complex, manual participation in switching is needed to realize selective switching of the power supply, power supply interruption is easy to occur during use, operation is inconvenient, and a space to be improved is reserved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a dual supply automatic switch-over circuit can realize the automatic switch-over power input by hardware, need not personnel and intervene, and it is convenient to use, the power supply is stable.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides a dual supply automatic switch-over circuit, is including the main control unit who controls gas equipment, characterized by: the power supply device comprises a main controller, an external power supply module, a detection circuit and a battery power supply module, wherein the main controller is coupled with the external power supply module to supply power to the main controller through external power, the detection circuit is coupled with the external power supply module to detect whether the external power supplies power, and the battery power supply module is coupled with the main controller and responds to the detection circuit to supply power through a battery when the main controller does not supply the external power.
Preferably, the detection circuit includes a first resistor and a second resistor connected in series between the external power and the ground terminal for dividing voltage, and an output node coupled between the first resistor and the second resistor for outputting the detection voltage.
Preferably, the battery of the battery power supply module is a lithium battery, and the battery power supply module further comprises a selector switch which is coupled to the lithium battery and responds to the detection circuit to control the power supply of the lithium battery to be switched on and off; the switch is coupled to the output node and switches on the battery power supply module when the output node does not output the detection voltage.
Preferably, the battery power supply module further comprises a boost circuit coupled between the switch and the main controller for boosting the voltage input to the main controller.
Preferably, the switch is a P-type MOS transistor having a source coupled to the lithium battery, a gate coupled to the output node of the detection circuit, and a drain coupled to the boost circuit.
Preferably, the charging circuit is coupled between the external power output end of the external power supply module and the battery anode of the battery power supply module so as to supply external power to charge the battery.
Preferably, the charging circuit comprises a diode for controlling the unidirectional current flow from the external power to the battery and a charging chip.
Preferably, the external power supply module comprises a voltage conversion circuit coupled between the external power output end and the main controller to convert the voltage input to the main controller.
To sum up, the utility model discloses following beneficial effect has:
through detection circuitry, realize the real-time detection to external power supply on the hardware to respond to detection circuitry through battery power supply module, the switching of realization power supply that can be automatic timely need not personnel and intervenes, realizes the uninterrupted power supply to the gas equipment power, and dual supply does not influence each other, uses convenient and power supply stable.
Drawings
FIG. 1 is a schematic diagram of a dual power switching circuit;
fig. 2 is a schematic diagram of a dual power supply automatic switching circuit.
In the figure: 1. an external power supply module; 2. a detection circuit; 3. a battery power supply module; 4. a charging circuit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The dual-power automatic switching circuit disclosed in this embodiment, as shown in fig. 1, controls a gas device through a main controller, and switches and supplies power to the main controller through an external power and a lithium battery, and further includes a detection circuit 2 for detecting the supply of the external power, and detects and judges whether the external power is normally supplied through the detection circuit 2, and when the external power is supplied, the external power charges the lithium battery, and meanwhile, the lithium battery is in an open circuit state to a power supply circuit of a control board, and at this time, the lithium battery does not supply power to a subsequent circuit; when no external power is available, the lithium battery starts to supply power at the moment.
As shown in fig. 2, the portable electronic device specifically includes an external power supply module 1, a detection circuit 2, a battery power supply module 3, and a charging circuit 4. The gas equipment is controlled by the main controller, and the detection circuit 2 is coupled between the external power output end and the grounding end of the external power supply module 1 and detects whether the external power electrically connected to the main controller is output and supplied.
The external power supply module 1 further comprises a voltage conversion circuit coupled between the external power and the main controller to convert the external power into a voltage required by the main controller, and the voltage conversion circuit preferably adopts a TPS54531 chip to convert the voltage of the external power connected to the main controller into a voltage required by setting. The external power is 24V stable direct current converted by an adapter.
The detection circuit 2 includes a first resistor and a second resistor connected in series between the external power and the ground terminal for voltage division, which are R1 and R2, respectively, and an output node coupled between the first resistor and the second resistor for outputting a detection voltage, and outputs the voltage detected by the detection circuit 2 through the output node to determine whether the external power supplies power.
The battery power supply module 3 comprises a lithium battery for supplying power, a change-over switch coupled to the lithium battery and responding to the detection voltage of the detection circuit 2 to perform on-off control on the power supply of the lithium battery, and a booster circuit coupled between the change-over switch and the main controller to boost the output voltage.
The switch has a source coupled to the lithium battery, a gate coupled to the output node of the detection circuit 1, and a drain coupled to the P-type MOS transistor Q1 of the boost circuit. The output node divides the external electricity through R1 and R2, sets a division value according to the threshold value of the MOS tube, so that when the external electricity supplies power, the voltage of the output node, namely the grid voltage of the PMOS tube, is higher than the source voltage, the PMOS tube is cut off, when the external electricity supplies power, the voltage of the output node is grounded, the source voltage of the PMOS tube is higher than the grid, and the change-over switch is switched on to realize the power supply of the lithium battery.
The boosting circuit preferably adopts a TPS61021A chip, when the voltage is higher than the set value, the power can be directly supplied to the rear stage, when the voltage is lower than the set value, the boosting chip starts to work, and the voltage is boosted to the proper value set, so that the main control panel can work stably at the proper working voltage.
The charging circuit 4 is coupled between the external power and the lithium battery, and the external power charges the lithium battery. Charging circuit 4 is including the one-way diode that is circulated to the lithium cell by outer electricity to the charging chip and the control current of lithium battery charging control, the charging chip is coupled in the output of outer electricity, diode D1 forward is coupled between the positive pole of charging chip and lithium cell, outer electricity charges the lithium cell through the charging chip, the electric quantity of lithium cell is sufficient, realize uninterrupted power source and supply power to back level circuit, avoid using disposable battery, cause and to appear the battery and lack of electricity or the not enough condition of voltage.
The operation steps and working conditions are as follows:
when external power is available, the output node of the detection circuit 2 is at a high level, and the PMOS tube of the Q1 is turned off; the external power supplies power to the main controller through the voltage conversion circuit, and the voltage conversion circuit selects the voltage reduction chip or the voltage boosting chip according to the actual voltage value;
when no external power is available, the output node of the detection circuit 2 is at a low level, the PMOS tube is conducted, the lithium battery reaches the rear stage through the MOS tube, the voltage of the lithium battery is generally 3.7V, when the voltage drops after being used for a period of time, the power supply voltage at the moment is reduced, and through a chip TPS61021A of a booster circuit of the battery power supply circuit 3, when the voltage is higher than a set value, the power can be directly supplied to the rear stage, and when the voltage is lower than the set value, the booster chip starts to work to boost the voltage to a proper value;
in addition, when external power is supplied, the external power charges the lithium battery through the charging chip through the charging circuit 4, and the uninterrupted power supply supplies power to the rear-stage circuit while the two-way power supply does not influence each other.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a dual supply automatic switch-over circuit, is including the main control unit who controls gas equipment, characterized by: the power supply device comprises a main controller, an external power supply module (1) which is coupled with the main controller to supply power to the main controller through external power, a detection circuit (2) which is coupled with the external power supply module to detect whether the external power supplies power, and a battery power supply module (3) which is coupled with the main controller and responds to the detection circuit (2) to supply power through a battery when the main controller does not supply power through the external power.
2. The dual power supply automatic switching circuit of claim 1, wherein: the detection circuit (2) comprises a first resistor and a second resistor which are connected in series between an external power and a grounding end for voltage division, and an output node which is coupled between the first resistor and the second resistor for outputting detection voltage.
3. The dual power supply automatic switching circuit of claim 2, wherein: the battery of the battery power supply module (3) is a lithium battery, and the battery power supply module also comprises a change-over switch which is coupled with the lithium battery and responds to the detection circuit (2) to control the power supply on-off of the lithium battery; the switch is coupled to the output node and switches on the battery power supply module (3) when the output node does not output the detection voltage.
4. The dual power supply automatic switching circuit of claim 3, wherein: the battery power supply module (3) further comprises a booster circuit which is coupled between the selector switch and the main controller and boosts the voltage input to the main controller.
5. The dual power supply automatic switching circuit of claim 3, wherein: the source electrode of the change-over switch is coupled with the lithium battery, the grid electrode of the change-over switch is coupled with the output node of the detection circuit (2), and the drain electrode of the change-over switch is coupled with the P-type MOS tube of the booster circuit.
6. The dual power supply automatic switching circuit of claim 1, wherein: the charging circuit (4) is coupled between the external power output end of the external power supply module (1) and the battery anode of the battery power supply module (3) for charging the battery by external power.
7. The dual power supply automatic switching circuit of claim 6, wherein: the charging circuit (4) comprises a charging chip and a diode for controlling current to flow from the external power to the battery in a single direction.
8. The dual power supply automatic switching circuit of claim 1, wherein: the external power supply module (1) comprises a voltage conversion circuit which is coupled between an external power output end and the main controller so as to convert the voltage input to the main controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920900691.9U CN209860663U (en) | 2019-06-14 | 2019-06-14 | Dual-power automatic switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920900691.9U CN209860663U (en) | 2019-06-14 | 2019-06-14 | Dual-power automatic switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209860663U true CN209860663U (en) | 2019-12-27 |
Family
ID=68942212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920900691.9U Active CN209860663U (en) | 2019-06-14 | 2019-06-14 | Dual-power automatic switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209860663U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111969694A (en) * | 2020-08-28 | 2020-11-20 | 深圳市新国都支付技术有限公司 | Power supply switching system |
| CN114187731A (en) * | 2021-12-08 | 2022-03-15 | 雅迪科技集团有限公司 | Electric motor car smog warning detecting system and electric motor car |
-
2019
- 2019-06-14 CN CN201920900691.9U patent/CN209860663U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111969694A (en) * | 2020-08-28 | 2020-11-20 | 深圳市新国都支付技术有限公司 | Power supply switching system |
| CN111969694B (en) * | 2020-08-28 | 2022-06-28 | 深圳市新国都支付技术有限公司 | Power supply switching system |
| CN114187731A (en) * | 2021-12-08 | 2022-03-15 | 雅迪科技集团有限公司 | Electric motor car smog warning detecting system and electric motor car |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203456897U (en) | Power supply switching circuit of handheld terminal and handheld terminal thereof | |
| CN205793566U (en) | A kind of single live wire switch | |
| CN104584364A (en) | Power source device having standby power-cutoff function, and method for controlling same | |
| CN209860663U (en) | Dual-power automatic switching circuit | |
| CN102570840A (en) | Voltage anode and cathode polarity switching circuit | |
| CN105071469A (en) | Solar charging circuit | |
| CN201177349Y (en) | Air conditioner controller and air conditioner system | |
| CN113525124B (en) | AC awakening circuit | |
| CN205051933U (en) | LED's drive power supply | |
| CN105072779B (en) | A kind of solar street lamp controller of the commercial power charged function of band | |
| CN204118850U (en) | A kind of flowmeter electric power system | |
| CN203104016U (en) | Power supply circuit of remote controller and air-conditioning system having the same | |
| CN203434864U (en) | Step-down switching type power supply unit | |
| CN203745567U (en) | Intelligent charging detection circuit and mobile power source | |
| CN202121344U (en) | Chargeable battery device and charging switching circuit | |
| CN203553969U (en) | Control system for back-up power supply capable of automatically adjusting charging current | |
| CN112510290A (en) | Heating control device and solar control system of lithium battery | |
| CN113629839A (en) | Solar power generation system with battery awakening charging function | |
| CN219458699U (en) | Low power consumption circuit of battery powered device | |
| CN214707267U (en) | Intelligent charger with double-battery voltage output | |
| CN215956093U (en) | Solar controller | |
| CN205105141U (en) | Energy -conserving supply circuit of solar energy cloudy day | |
| CN215378559U (en) | Power management circuit | |
| CN220139280U (en) | Control circuit of solar street lamp | |
| CN117081218B (en) | Charging pile with automatic charging mode switching function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |