CN215267708U - Battery undervoltage automatic power-off circuit - Google Patents
Battery undervoltage automatic power-off circuit Download PDFInfo
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- CN215267708U CN215267708U CN202121269549.2U CN202121269549U CN215267708U CN 215267708 U CN215267708 U CN 215267708U CN 202121269549 U CN202121269549 U CN 202121269549U CN 215267708 U CN215267708 U CN 215267708U
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Abstract
The utility model discloses an under-voltage automatic power-off circuit of battery relates to the battery field, this under-voltage automatic power-off circuit of battery, include: the power supply switch module is used for supplying power to the battery and switching on the switch control circuit; the voltage detection module is used for detecting whether the voltage of the battery reaches the undervoltage threshold value; the relay working module is used for disconnecting the circuit when the battery is under-voltage; the load working module is used for working when the battery supplies power to the load; the first end of load work module input, voltage detection module input are connected to power switch module output, and relay work module input is connected to voltage detection module output, compares with prior art, the beneficial effects of the utility model are that: compared with a traditional rechargeable battery, the rechargeable battery has the voltage detection circuit, when the battery voltage is lower, the circuit can be automatically disconnected, the situation that the battery continuously supplies power for load work, and the accelerated consumption of the battery charging period is caused is prevented.
Description
Technical Field
The utility model relates to a battery field specifically is an under-voltage automatic power-off circuit of battery.
Background
Battery (Battery) refers to a device that converts chemical energy into electrical energy in a cup, tank, or other container or portion of a composite container that holds an electrolyte solution and metal electrodes to generate an electric current. The battery typically has 500 charge cycles, for example: a lithium battery uses half the amount of electricity on the first day and then fully charges it. If this is still the case the next day, i.e. half, a total of two charges, this can only be counted as one charge cycle. After 500 charging cycles are finished, the rechargeable battery can reduce the electric energy capacity of the battery in the process of repeated charging and discharging, so that the battery is slow and not durable.
Meanwhile, when the battery is charged and discharged, the reduction of the battery capacity is further accelerated due to overcharge and overdischarge, so that the consumption speed of the battery is higher in 500 charging cycles, and improvement is needed.
Disclosure of Invention
An object of the utility model is to provide an under-voltage automatic power-off circuit of battery to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
an undervoltage auto-power-off circuit for a battery, comprising:
the power supply switch module is used for supplying power to the battery and switching on the switch control circuit;
the voltage detection module is used for detecting whether the voltage of the battery reaches the undervoltage threshold value;
the relay working module is used for disconnecting the circuit when the battery is under-voltage;
the load working module is used for working when the battery supplies power to the load;
the output end of the power supply switch module is connected with the first end of the input end of the load working module and the input end of the voltage detection module, the output end of the voltage detection module is connected with the input end of the relay working module, and the output end of the relay working module is connected with the second end of the input end of the load working module.
As a further aspect of the present invention: the power supply switch module comprises a battery E1, a diode D1, a switch S1, a capacitor C1, a resistor R1, a diode D2 and a resistor R2, wherein the anode of the battery E1 is connected with the anode of the diode D1, the cathode of a diode D1 is connected with the switch S1, the other end of the switch S1 is connected with the capacitor C1 and the resistor R1, the other end of the capacitor C1 is connected with the cathode of the battery E1 and the resistor R2, the other end of the resistor R1 is connected with the anode of a diode D2, and the cathode of a diode D2 is connected with the first end of the input end of the load working module and the input end of the voltage detection module.
As a further aspect of the present invention: the voltage detection module comprises a diode D3, a diode D4, a capacitor C2, a single transistor V1 and a resistor R3, the cathode of the diode D3 is connected with the output end of the power supply switch module, the anode of the diode D3 is connected with the cathode of the diode D4, the anode of the diode D4 is connected with the third end of the single transistor V1 and the capacitor C2, the other end of the capacitor C2 is connected with the other end of the resistor R2, the first end of the single transistor V1 is connected with the resistor R3, the other end of the resistor R3 is connected with the output end of the power supply switch module, and the second end of the single transistor V1 is connected with the input end of the relay working module.
As a further aspect of the present invention: the relay working module comprises a diode D5 and a relay J2, the anode of the diode D5 is connected with the input ends of the relay J2 and the voltage detection module, the cathode of the diode D5 is connected with the other end of the resistor R2, and the other end of the relay J2 is connected with the other end of the resistor R2.
As a further aspect of the present invention: the load working module comprises a switch S2, a load X and a resistor R4, one end of the switch S2 is connected with the output end of the power supply switch module, the other end of the switch S2 is connected with the load X, the other end of the load X is connected with the resistor R4, and the other end of the resistor R4 is connected with the other end of the resistor R2.
Compared with the prior art, the beneficial effects of the utility model are that: compared with a traditional rechargeable battery, the rechargeable battery has the voltage detection circuit, when the battery voltage is lower, the circuit can be automatically disconnected, the situation that the battery continuously supplies power for load work, and the accelerated consumption of the battery charging period is caused is prevented.
Drawings
Fig. 1 is a schematic diagram of an undervoltage auto-power-off circuit.
Fig. 2 is a circuit diagram of an undervoltage auto-power-off circuit.
Fig. 3 is an equivalent circuit diagram of a single transistor V1.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
Referring to fig. 1, an under-voltage auto-power-off circuit for a battery includes:
the power supply switch module is used for supplying power to the battery and switching on the switch control circuit;
the voltage detection module is used for detecting whether the voltage of the battery reaches the undervoltage threshold value;
the relay working module is used for disconnecting the circuit when the battery is under-voltage;
the load working module is used for working when the battery supplies power to the load;
the output end of the power supply switch module is connected with the first end of the input end of the load working module and the input end of the voltage detection module, the output end of the voltage detection module is connected with the input end of the relay working module, and the output end of the relay working module is connected with the second end of the input end of the load working module.
In this embodiment: referring to fig. 2, the power supply switch module includes a battery E1, a diode D1, a switch S1, a capacitor C1, a resistor R1, a diode D2, and a resistor R2, wherein an anode of the battery E1 is connected to an anode of the diode D1, a cathode of the diode D1 is connected to the switch S1, another end of the switch S1 is connected to the capacitor C1 and the resistor R1, another end of the capacitor C1 is connected to a cathode of the battery E1 and the resistor R2, another end of the resistor R1 is connected to an anode of the diode D2, and a cathode of the diode D2 is connected to the first end of the load operation module input terminal and the voltage detection module input terminal.
The battery E1 supplies power, the diode D1 prevents reverse current input to damage the battery E1, the switch S1 is a circuit operation switch, the diode D2 (light emitting diode) emits light when the battery E1 supplies power, and the display battery E1 supplies power.
In this embodiment: referring to fig. 2, the voltage detection module includes a diode D3, a diode D4, a capacitor C2, a single transistor V1, and a resistor R3, a cathode of the diode D3 is connected to the output terminal of the power supply switch module, an anode of the diode D3 is connected to a cathode of the diode D4, an anode of the diode D4 is connected to the third terminal of the single transistor V1 and the capacitor C2, another end of the capacitor C2 is connected to another end of the resistor R2, a first end of the single transistor V1 is connected to the resistor R3, another end of the resistor R3 is connected to the output terminal of the power supply switch module, and a second end of the single transistor V1 is connected to the input terminal of the relay operating module.
The diode D3 and the diode D4 are voltage stabilizing diodes for detecting the input voltage of the battery E1, the voltage input by the battery E1 is charged into the capacitor C2 after breaking down the diode D3 and the diode D4, so that the voltage of the capacitor C2 plus the rated voltages of the diode D3 and the diode D4 is the voltage of the battery E1, the voltage of the capacitor C2 is the voltage of the emitter (the third end) of the single transistor V1, and the single transistor V1 is turned on after the voltage of the capacitor C2 reaches a certain value.
Referring to fig. 3, a PN junction formed by a P region connected to the third end of the emitter of the single transistor V1 and the N-type silicon rod is equivalent to a diode D; the N-type silicon rod presents high resistance due to low doping concentration, the equivalent resistance between the cathode of the diode and the base electrode (the second end) is R, and the equivalent resistance between the cathode of the diode and the base electrode (the first end) is RP; the resistance of R is controlled by the voltage between the third terminal and the first terminal, so that the resistance is equivalent to a variable resistor.
In this embodiment: referring to fig. 2, the relay operating module includes a diode D5 and a relay J2, an anode of the diode D5 is connected to the input terminals of the relay J2 and the voltage detection module, a cathode of the diode D5 is connected to the other end of the resistor R2, and the other end of the relay J2 is connected to the other end of the resistor R2.
When the relay J2 works, the switch S2 is closed; when relay J2 is not operating, switch S2 pops open.
In this embodiment: referring to fig. 2, the load working module includes a switch S2, a load X, and a resistor R4, wherein one end of the switch S2 is connected to the output end of the power supply switch module, the other end of the switch S2 is connected to the load X, the other end of the load X is connected to the resistor R4, and the other end of the resistor R4 is connected to the other end of the resistor R2.
After the single transistor V1 is turned on, the relay J2 is powered on to work, the switch S2 is controlled to be closed, and the battery E1 supplies power to the load X through the switch S2.
The utility model discloses a theory of operation is: when the voltage of the battery E1 is normal, the voltage of the capacitor C2 is large, so that the single transistor V1 is conducted, the relay J2 works, the switch S2 is closed, the battery E1 supplies power for the work of the load X, and at the moment, the diode D2 and the diode D5 emit light, and the display circuit operates normally; when the voltage of the battery E1 is under-voltage, the voltage of the capacitor C2 is small, so that the single transistor V1 is not conducted, the relay J2 does not work, the switch S2 is not closed, the load X does not work, at the moment, the diode D2 emits light, the diode D5 does not emit light, and the battery under-voltage is displayed.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The utility model provides a battery undervoltage auto-power-off circuit which characterized in that:
this battery undervoltage auto-power-off circuit includes:
the power supply switch module is used for supplying power to the battery and switching on the switch control circuit;
the voltage detection module is used for detecting whether the voltage of the battery reaches the undervoltage threshold value;
the relay working module is used for disconnecting the circuit when the battery is under-voltage;
the load working module is used for working when the battery supplies power to the load;
the output end of the power supply switch module is connected with the first end of the input end of the load working module and the input end of the voltage detection module, the output end of the voltage detection module is connected with the input end of the relay working module, and the output end of the relay working module is connected with the second end of the input end of the load working module.
2. The undervoltage automatic power-off circuit of claim 1, wherein the power supply switch module comprises a battery E1, a diode D1, a switch S1, a capacitor C1, a resistor R1, a diode D2, and a resistor R2, wherein an anode of the battery E1 is connected to an anode of the diode D1, a cathode of the diode D1 is connected to the switch S1, another end of the switch S1 is connected to the capacitor C1 and the resistor R1, another end of the capacitor C1 is connected to a cathode of the battery E1 and the resistor R2, another end of the resistor R1 is connected to an anode of the diode D2, and a cathode of the diode D2 is connected to the first end of the load operation module input terminal and the voltage detection module input terminal.
3. The undervoltage automatic power-off circuit as claimed in claim 1, wherein the voltage detection module comprises a diode D3, a diode D4, a capacitor C2, a single transistor V1 and a resistor R3, a cathode of the diode D3 is connected to the output terminal of the power supply switch module, an anode of the diode D3 is connected to a cathode of the diode D4, an anode of the diode D4 is connected to the third terminal of the single transistor V1 and the capacitor C2, the other end of the capacitor C2 is connected to the other end of the resistor R2, a first end of the single transistor V1 is connected to the resistor R3, the other end of the resistor R3 is connected to the output terminal of the power supply switch module, and a second end of the single transistor V1 is connected to the input terminal of the relay operation module.
4. The undervoltage automatic power-off circuit as claimed in claim 1, wherein the relay operation module comprises a diode D5 and a relay J2, the anode of the diode D5 is connected to the input terminals of the relay J2 and the voltage detection module, the cathode of the diode D5 is connected to the other end of the resistor R2, and the other end of the relay J2 is connected to the other end of the resistor R2.
5. The under-voltage battery auto-power-off circuit of claim 4, wherein the load operation module comprises a switch S2, a load X, and a resistor R4, one end of the switch S2 is connected to the output end of the power supply switch module, and the other end of the switch S2 is connected to the output end of the power supply switch module
The other end of the load X is connected with the resistor R4, and the other end of the resistor R4 is connected with the other end of the resistor R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121269549.2U CN215267708U (en) | 2021-06-07 | 2021-06-07 | Battery undervoltage automatic power-off circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121269549.2U CN215267708U (en) | 2021-06-07 | 2021-06-07 | Battery undervoltage automatic power-off circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215267708U true CN215267708U (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121269549.2U Active CN215267708U (en) | 2021-06-07 | 2021-06-07 | Battery undervoltage automatic power-off circuit |
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| Country | Link |
|---|---|
| CN (1) | CN215267708U (en) |
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2021
- 2021-06-07 CN CN202121269549.2U patent/CN215267708U/en active Active
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