CN214255809U - Double-battery power supply circuit - Google Patents
Double-battery power supply circuit Download PDFInfo
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- CN214255809U CN214255809U CN202120026492.7U CN202120026492U CN214255809U CN 214255809 U CN214255809 U CN 214255809U CN 202120026492 U CN202120026492 U CN 202120026492U CN 214255809 U CN214255809 U CN 214255809U
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Abstract
The utility model discloses a double cell supply circuit, include: the first battery power supply circuit is used for preferentially supplying power to the electric equipment; the second battery power supply circuit is used for supplying power to the electric equipment after the first battery power supply circuit stops supplying power; the first battery low-voltage alarm circuit is used for sending alarm information when the power supply voltage of the first battery power supply circuit is lower than a preset value; and the second battery low-voltage alarm circuit is used for sending alarm information when the power supply voltage of the second battery power supply circuit is lower than a preset value. The utility model discloses a double cell power supply, first battery supply circuit gives the power supply of equipment key circuit earlier, launches the power supply of second battery supply circuit automatically when first battery supply circuit electric quantity will exhaust, ensures that data can not lose. Can be widely applied to the technical field of battery power supply.
Description
Technical Field
The utility model relates to a battery powered technology field especially relates to a double cell supply circuit.
Background
When the external power supply of the electronic equipment is suddenly powered down, critical data can be lost, and operation problems can occur. The battery is used as a backup power supply, and the battery supplies power to a key circuit of the equipment when the power is down so as to protect key data. However, the single battery may still have a problem in supplying power, and when the remaining battery capacity is small and needs to be replaced, the external power source needs to be disconnected for personal safety, and the situation of data loss still occurs at this time.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the present invention provides a dual battery power supply circuit.
The utility model adopts the technical proposal that:
a dual battery supply circuit comprising:
the first battery power supply circuit is used for preferentially supplying power to the electric equipment;
the second battery power supply circuit is used for supplying power to the electric equipment after the first battery power supply circuit stops supplying power;
the first battery low-voltage alarm circuit is used for sending alarm information when the power supply voltage of the first battery power supply circuit is lower than a preset value;
and the second battery low-voltage alarm circuit is used for sending alarm information when the power supply voltage of the second battery power supply circuit is lower than a preset value.
Further, the first battery supply circuit includes a first battery and a first diode;
the negative electrode of the first battery is grounded, the positive electrode of the first battery is connected with the positive electrode of the first diode, and the negative electrode of the first diode supplies power to the electric equipment.
Further, the second battery power supply circuit comprises a second battery, a first triode, a third diode, a seventh diode, a ninth resistor and a first resistor;
the negative pole ground connection of second battery, the anodal of second battery is connected the projecting pole of first triode, the collecting electrode of first triode is connected the positive pole of third diode, the base of first triode is connected the one end of first resistance, the other end ground connection of first resistance, the anodal of seventh diode is connected the positive pole of first battery, the negative pole of seventh diode is connected the one end of ninth resistance, the other end of ninth resistance is connected the base of first triode.
Further, the first battery low-voltage alarm circuit comprises an eighth diode, a seventh resistor, a fourth triode, a second resistor, a fourth resistor and a fourth light-emitting diode;
the positive pole of eighth diode is connected the positive pole of first battery, the negative pole of eighth diode is connected the one end of seventh resistance, the other end of seventh resistance is connected the base of fourth triode, the main power supply is connected to the projecting pole of fourth triode, the collecting electrode of fourth triode is connected the positive pole of fourth emitting diode, the negative pole of fourth emitting diode is connected the one end of fourth resistance, the other end ground connection of fourth resistance, the one end of second resistance is connected the base of fourth triode, the other end ground connection of second resistance.
Further, the second battery low-voltage alarm circuit comprises a ninth diode, an eighth resistor, a second triode, a sixth resistor, a fifth resistor and a fifth light-emitting diode;
the positive pole of ninth diode is connected the positive pole of second battery, the negative pole of ninth diode is connected the one end of eighth resistance, the other end of eighth resistance is connected the base of second triode, the main power supply is connected to the projecting pole of second triode, the collecting electrode of second triode is connected the positive pole of fifth emitting diode, the negative pole of fifth emitting diode is connected the one end of fifth resistance, the other end ground connection of fifth resistance, the one end of sixth resistance is connected the base of second triode, the other end ground connection of sixth resistance.
Further, the seventh diode is a schottky diode.
The utility model has the advantages that: the utility model discloses a double cell power supply, first battery supply circuit gives the power supply of equipment key circuit earlier, launches the power supply of second battery supply circuit automatically when first battery supply circuit electric quantity will exhaust, ensures that data can not lose.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a circuit diagram of a dual battery power supply circuit in an embodiment of the present invention;
fig. 2 is a circuit diagram of a first battery power supply circuit in an embodiment of the present invention;
fig. 3 is a circuit diagram of a second battery power supply circuit in an embodiment of the present invention;
fig. 4 is a circuit diagram of a first battery low voltage alarm circuit according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a second battery low-voltage alarm circuit according to an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
As shown in fig. 1, the present embodiment provides a dual battery power supply circuit, including:
the first battery power supply circuit is used for preferentially supplying power to the electric equipment;
the second battery power supply circuit is used for supplying power to the electric equipment after the first battery power supply circuit stops supplying power;
the first battery low-voltage alarm circuit is used for sending alarm information when the power supply voltage of the first battery power supply circuit is lower than a preset value;
and the second battery low-voltage alarm circuit is used for sending alarm information when the power supply voltage of the second battery power supply circuit is lower than a preset value.
Aiming at the defects and shortcomings of the existing single battery power supply, because the external power supply needs to be disconnected due to personal safety during battery replacement, the data loss of the equipment still occurs. When the double batteries supply power, the first battery supplies power for the key circuit of the equipment, the second battery is automatically started to supply power when the electric quantity of the first battery is exhausted, the low-voltage alarm indicator lamp of the first battery is turned on to prompt the first battery to be exhausted, the first battery can be replaced, and data cannot be lost due to the fact that the second battery supplies power. And when the second battery is to be replaced, the first battery supplies power, so that the equipment can not lose data.
The above circuits are described in detail below with reference to fig. 2-5.
As shown in fig. 2, the first battery power supply circuit includes a first battery BAT1 and a first diode D1; the negative electrode of the first battery BAT1 is grounded, and the positive electrode of the battery is connected with the positive electrode of the first diode D1.
The voltage of the first battery BAT1 is 3V after passing through the diode D1, and the first battery BAT1 supplies power to the key circuit of the device. D1 not only reduces voltage, but also ensures that the 3.7V system power supply can not charge the BAT1 battery reversely, thereby ensuring the safety of the battery.
As shown in fig. 3, the second battery power supply circuit includes a second battery BAT2, a first transistor Q1, a third diode D3, a seventh diode D7, a ninth resistor R9, and a first resistor R1;
the negative electrode of the second battery BAT2 is grounded, the positive electrode of the second battery BAT2 is connected with the emitter of a first triode Q1, the collector of the first triode is connected with the positive electrode of a third diode D3, the base of the first triode is connected with one end of a first resistor R1, the other end of the first resistor is grounded, the positive electrode of a seventh diode is connected with the positive electrode of the first battery, the negative electrode of the seventh diode is connected with one end of a ninth resistor R9, and the other end of the ninth resistor R9 is connected with the base of a first triode Q1.
The voltage drop of D7 in the second battery power supply circuit is about 0.3V by using a Schottky diode. When the voltage of BAT1 is not reduced, the voltage is reduced through D7, the voltage of the base electrode of Q1 is about 3.4V, Q1 is cut off, and BAT2 can not supply power to the device. When the first battery BAT1 is running low and the voltage drops to Q1, the BAT2 will power the device. The voltage of battery BAT2 was reduced by Q1 and D3 to about 3V. D3 not only reduces voltage, but also ensures that the 3.7V system power supply can not charge the BAT2 battery reversely, thereby ensuring the safety of the battery.
As shown in fig. 4, the first battery low voltage alarm circuit includes an eighth diode D8, a seventh resistor R7, a fourth transistor Q4, a second resistor R2, a fourth resistor R4, and a fourth light emitting diode D4;
the positive electrode of the eighth diode D8 is connected with the positive electrode of the first battery BAT1, the negative electrode of the D8 is connected with one end of a seventh resistor R7, the other end of the seventh resistor R7 is connected with the base electrode of a fourth triode Q4, the emitting electrode of the fourth triode Q4 is connected with a main power supply 3.7V, the collecting electrode of the fourth triode Q4 is connected with the positive electrode of a fourth light-emitting diode D4, the negative electrode of the D4 is connected with one end of a fourth resistor R4, the other end of the R4 is grounded, one end of the second resistor R2 is connected with the base electrode of the fourth triode, and the other end of the R2 is grounded.
The voltage of BAT1 is 3.7V, the voltage of base electrode is 3V to Q4 through D8 and R7, Q4 is in cut-off state, and LED D4 can not be lighted. When BAT1 runs out of charge, the voltage drops, causing Q4 to turn on, and D4 lights the alarm when the external power supply powers up the device. D4 is lighted by external power supply, so saving the power of BAT 1.
As shown in fig. 5, the second battery low-voltage alarm circuit includes a ninth diode D9, an eighth resistor R8, a second triode Q2, a sixth resistor R6, a fifth resistor R5, and a fifth light emitting diode D5;
the positive pole of the ninth diode D9 is connected with the positive pole of the second battery BAT2, the negative pole of the D9 is connected with one end of an eighth resistor R8, the other end of the eighth resistor R8 is connected with the base of a second triode Q2, the emitting pole of the second triode Q2 is connected with a main power supply of 3.7V, the collecting electrode of the second triode Q2 is connected with the positive pole of a fifth light-emitting diode D5, the negative pole of the D5 is connected with one end of a fifth resistor R5, the other end of the R5 is grounded, one end of a sixth resistor R6 is connected with the base of the second triode Q2, and the other end of the R6 is grounded.
The voltage of BAT2 is 3.7V, the voltage of base electrode of Q2 is about 3V through D9 and R8, Q2 is in cut-off state, and LED D5 can not be lighted. When BAT2 runs out of charge, the voltage drops, causing Q2 to turn on, and D5 lights the alarm when the external power supply powers up the device. D5 is lighted by external power supply, so saving the power of BAT 2.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (6)
1. A dual battery power supply circuit, comprising:
the first battery power supply circuit is used for preferentially supplying power to the electric equipment;
the second battery power supply circuit is used for supplying power to the electric equipment after the first battery power supply circuit stops supplying power;
the first battery low-voltage alarm circuit is used for sending alarm information when the power supply voltage of the first battery power supply circuit is lower than a preset value;
and the second battery low-voltage alarm circuit is used for sending alarm information when the power supply voltage of the second battery power supply circuit is lower than a preset value.
2. The dual battery supply circuit of claim 1, wherein the first battery supply circuit comprises a first battery and a first diode;
the negative electrode of the first battery is grounded, the positive electrode of the first battery is connected with the positive electrode of the first diode, and the negative electrode of the first diode supplies power to the electric equipment.
3. The dual battery power supply circuit of claim 2, wherein the second battery power supply circuit comprises a second battery, a first transistor, a third diode, a seventh diode, a ninth resistor, and a first resistor;
the negative pole ground connection of second battery, the anodal of second battery is connected the projecting pole of first triode, the collecting electrode of first triode is connected the positive pole of third diode, the base of first triode is connected the one end of first resistance, the other end ground connection of first resistance, the anodal of seventh diode is connected the positive pole of first battery, the negative pole of seventh diode is connected the one end of ninth resistance, the other end of ninth resistance is connected the base of first triode.
4. The dual-battery power supply circuit of claim 2, wherein the first battery low voltage alarm circuit comprises an eighth diode, a seventh resistor, a fourth triode, a second resistor, a fourth resistor and a fourth light emitting diode;
the positive pole of eighth diode is connected the positive pole of first battery, the negative pole of eighth diode is connected the one end of seventh resistance, the other end of seventh resistance is connected the base of fourth triode, the main power supply is connected to the projecting pole of fourth triode, the collecting electrode of fourth triode is connected the positive pole of fourth emitting diode, the negative pole of fourth emitting diode is connected the one end of fourth resistance, the other end ground connection of fourth resistance, the one end of second resistance is connected the base of fourth triode, the other end ground connection of second resistance.
5. The dual-battery power supply circuit of claim 3, wherein the second battery low-voltage alarm circuit comprises a ninth diode, an eighth resistor, a second triode, a sixth resistor, a fifth resistor and a fifth light emitting diode;
the positive pole of ninth diode is connected the positive pole of second battery, the negative pole of ninth diode is connected the one end of eighth resistance, the other end of eighth resistance is connected the base of second triode, the main power supply is connected to the projecting pole of second triode, the collecting electrode of second triode is connected the positive pole of fifth emitting diode, the negative pole of fifth emitting diode is connected the one end of fifth resistance, the other end ground connection of fifth resistance, the one end of sixth resistance is connected the base of second triode, the other end ground connection of sixth resistance.
6. The dual battery supply circuit of claim 3 wherein said seventh diode is a schottky diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120026492.7U CN214255809U (en) | 2021-01-06 | 2021-01-06 | Double-battery power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120026492.7U CN214255809U (en) | 2021-01-06 | 2021-01-06 | Double-battery power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214255809U true CN214255809U (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120026492.7U Active CN214255809U (en) | 2021-01-06 | 2021-01-06 | Double-battery power supply circuit |
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|---|---|
| CN (1) | CN214255809U (en) |
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2021
- 2021-01-06 CN CN202120026492.7U patent/CN214255809U/en active Active
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