CN211720322U - Battery switching circuit and electronic equipment - Google Patents
Battery switching circuit and electronic equipment Download PDFInfo
- Publication number
- CN211720322U CN211720322U CN201921508257.2U CN201921508257U CN211720322U CN 211720322 U CN211720322 U CN 211720322U CN 201921508257 U CN201921508257 U CN 201921508257U CN 211720322 U CN211720322 U CN 211720322U
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- Prior art keywords
- battery switching
- switching circuit
- supply unit
- circuit
- power supply
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Abstract
The utility model is suitable for a battery switching technical field provides a battery switching circuit and electronic equipment, including the singlechip to and be used for providing the first matching circuit of first check point, this first check point connects the external power input end; the second matching circuit is used for providing a second detection point, and the second detection point is connected with the internal power storage/supply unit; the control circuit is used for receiving the instruction of the singlechip and controlling the power supply state of the power storage/supply unit; and a storage/power supply unit. The utility model also provides an electronic equipment who has above-mentioned circuit. The utility model discloses circuit structure is simple, and the cost is lower.
Description
Technical Field
The utility model relates to a battery switching circuit technical field especially relates to a battery switching circuit and electronic equipment.
Background
In the field of electronic circuit application, most Micro Control Unit (MCU) application systems usually use two power supplies. One is mains supply, which supplies power to the MCU after alternating current is rectified, filtered and stabilized; the other type is a battery, and in order to prevent the loss of internal metering data caused by the power failure of the mains supply, a standby battery is adopted for supplying power. The conventional system employs an automatic power switching circuit as shown in fig. 1. A circuit formed by a special switching chip of a one-bit Linte chip (LTC4412) of the switch is complex, and the LTC series chips have very high price.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect, the present invention provides a battery switching circuit and an electronic device, which have simple structure and can greatly reduce the circuit cost.
In order to achieve the above object, the present invention provides a battery switching circuit, including:
a single chip microcomputer, and
the first matching circuit is used for providing a first detection point, and the first detection point is connected with an external power supply input end;
the second matching circuit is used for providing a second detection point, and the second detection point is connected with the internal power storage/supply unit;
the control circuit is used for receiving the instruction of the singlechip and controlling the power supply state of the power storage/supply unit; and
a storage/power supply unit.
According to the utility model discloses a battery switching circuit, control circuit includes IRF7328 chip, and the G end of this chip is connected through a triode the singlechip.
According to the utility model discloses a battery switching circuit, first matching circuit includes parallelly connected electric capacity, resistance and diode.
According to the utility model discloses a battery switching circuit, second matching circuit includes parallelly connected electric capacity, resistance and diode.
According to the utility model discloses a battery switching circuit, a resistance is connected between first detection point and the external power supply input.
According to the utility model discloses a battery switching circuit, the second detection point is with storing up/power supply unit's a resistance of being connected.
According to the utility model discloses a battery switching circuit, the D end of IRF7328 chip is connected and is stored up/power supply unit, the S end of IRF7328 chip is as external output.
The utility model also provides an include battery switching circuit's electronic equipment.
The utility model is suitable for a battery switching technical field provides a battery switching circuit, including the singlechip to and be used for providing the first matching circuit of first check point, this first check point connects the external power input end; the second matching circuit is used for providing a second detection point, and the second detection point is connected with the internal power storage/supply unit; the control circuit is used for receiving the instruction of the singlechip and controlling the power supply state of the power storage/supply unit; and a storage/power supply unit. The utility model also provides an electronic equipment who has above-mentioned circuit. The utility model discloses circuit structure is simple, and the cost is lower.
Drawings
FIG. 1 is a prior art switching circuit diagram;
FIG. 2 is a schematic circuit diagram of the present invention;
fig. 3 is a circuit structure diagram according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2, the utility model provides a battery switching circuit, include:
a single chip microcomputer, and
the first matching circuit is used for providing a first detection point, and the first detection point is connected with an external power supply input end;
the second matching circuit is used for providing a second detection point, and the second detection point is connected with the internal power storage/supply unit;
the control circuit is used for receiving the instruction of the singlechip and controlling the power supply state of the power storage/supply unit; and
a storage/power supply unit.
In specific application, the storage/power supply unit is used as a standby power supply, and when no external power supply exists, the storage/power supply unit provides certain voltage for normal operation of a system.
Referring to fig. 3, the first detection point corresponds to V _ PWR1 in this embodiment, and the second detection point corresponds to V _ PWR in this embodiment. The single chip microcomputer and the power storage/supply unit are not shown in the figure, but the understanding of the technical scheme by the technical personnel in the field is not influenced. Specifically, the control circuit comprises an IRF7328 chip, and the G (G1, G2) end of the chip is connected with a GPIO12 pin of the singlechip through a triode Q14.
Corresponding to the IRF7328 chip, the UPS12V is shown as a power supply output of the battery, which is output to the first matching circuit and other corresponding power utilization modules.
In specific application, when the external DC power supply is 13.6V (set to be slightly higher than the battery voltage 12V), the V _ PWR1 detects the voltage and provides the voltage to the single chip microcomputer, and the single chip microcomputer controls the GPIO12 to cut off the U19, so that the external DC power supply is only provided at the moment.
When the external power is lost, the battery voltage (DC12.6V) is charged. In the prior art, when Pmosfet manages high side voltage, S pole is connected with input and D pole is connected with output. In the application, based on the internal structure of the IRF7328 chip, the circuit connection method is that the D connection input (the battery DC12.6V) is connected with the S connection output, so that a small current is firstly provided for the single chip microcomputer by utilizing an internal protection diode, the single chip microcomputer is electrified, the single chip microcomputer detects that the V _ PWR has a point, the V _ PWR1 is electroless, the single chip microcomputer controls the GPIO12 to open the U19, the U19 is switched on the SD electrode, the battery is supplied with a large current, the voltage of two ends of the protection diode is equal, and the protection diode stops supplying power.
The circuit is simple in structure, and compared with a complex circuit switching structure using LTC4412 as a main control chip, the cost of the circuit is greatly reduced.
The application also correspondingly provides the electronic equipment with the control circuit, so that the cost of the electronic equipment is greatly reduced.
To sum up, the utility model is suitable for the technical field of battery switching, and provides a battery switching circuit, which comprises a single chip microcomputer and a first matching circuit used for providing a first detection point, wherein the first detection point is connected with an external power supply input end; the second matching circuit is used for providing a second detection point, and the second detection point is connected with the internal power storage/supply unit; the control circuit is used for receiving the instruction of the singlechip and controlling the power supply state of the power storage/supply unit; and a storage/power supply unit. The utility model also provides an electronic equipment who has above-mentioned circuit. The utility model discloses circuit structure is simple, and the cost is lower.
Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.
Claims (8)
1. A battery switching circuit, comprising:
a single chip microcomputer, and
the first matching circuit is used for providing a first detection point, and the first detection point is connected with an external power supply input end;
the second matching circuit is used for providing a second detection point, and the second detection point is connected with the internal power storage/supply unit;
the control circuit is used for receiving the instruction of the singlechip and controlling the power supply state of the power storage/supply unit; and
a storage/power supply unit.
2. The battery switching circuit according to claim 1, wherein the control circuit comprises an IRF7328 chip, and the G terminal of the chip is connected to the single chip microcomputer through a triode.
3. The battery switching circuit of claim 1, wherein the first matching circuit comprises a capacitor, a resistor, and a diode in parallel.
4. The battery switching circuit of claim 1, wherein the second matching circuit comprises a capacitor, a resistor, and a diode in parallel.
5. The battery switching circuit according to claim 1, wherein a resistor is connected between the first detection point and the external power input terminal.
6. The battery switching circuit of claim 1, wherein the second sensing point is connected to a resistor of the storage/power supply unit.
7. The battery switching circuit according to claim 2, wherein the D terminal of the IRF7328 chip is connected to a storage/power supply unit, and the S terminal of the IRF7328 chip is used as an external output.
8. An electronic device comprising the battery switching circuit according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921508257.2U CN211720322U (en) | 2019-09-11 | 2019-09-11 | Battery switching circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921508257.2U CN211720322U (en) | 2019-09-11 | 2019-09-11 | Battery switching circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211720322U true CN211720322U (en) | 2020-10-20 |
Family
ID=72812365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921508257.2U Expired - Fee Related CN211720322U (en) | 2019-09-11 | 2019-09-11 | Battery switching circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211720322U (en) |
-
2019
- 2019-09-11 CN CN201921508257.2U patent/CN211720322U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201020 Termination date: 20210911 |