CN212751785U - Electric power storage battery overvoltage and undervoltage alarm circuit with acousto-optic alarm function - Google Patents
Electric power storage battery overvoltage and undervoltage alarm circuit with acousto-optic alarm function Download PDFInfo
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- CN212751785U CN212751785U CN202021701104.2U CN202021701104U CN212751785U CN 212751785 U CN212751785 U CN 212751785U CN 202021701104 U CN202021701104 U CN 202021701104U CN 212751785 U CN212751785 U CN 212751785U
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Abstract
The utility model relates to an under-voltage alarm circuit is crossed to electric power battery with acousto-optic alarming function, its structure includes excessive pressure under-voltage detection circuit, switch circuit, excessive pressure under-voltage acousto-optic alarm circuit and output normal display circuit. The utility model discloses after the definite overvoltage under-voltage that takes place, the alarm display circuit sends audible-visual annunciator, sets up the normal display circuit of output in addition, provides audible-visual annunciator after the battery takes place the overvoltage under-voltage trouble, provides green normal output signal under electric power battery output normal condition.
Description
Technical Field
The utility model relates to a power protection circuit, specifically speaking are under-voltage warning circuit is crossed to electric power battery with reputation alarming function.
Background
Along with the development of energy science and technology, the application of electric power storage batteries is more and more extensive, but the overvoltage and undervoltage protection circuit of the electric power battery generally does not have the audible and visual alarm of a single battery, and does not output normal indication.
The prior art has the following disadvantages: the normal work of the power storage battery has no state indication, and a meter is required to be used for measurement, so that the time and the labor are wasted. There is no audible and visual alarm after the overvoltage and undervoltage fault occurs, and there is no status indication in normal output, so it is more necessary to design an electric power storage battery overvoltage and undervoltage alarm circuit with audible and visual alarm function.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an under-voltage alarm circuit is crossed to electric power battery with audible and visual warning to it does not have audible and visual warning to take place under-voltage trouble among the solution prior art, and the problem of the no state indication of normal output.
The utility model is realized in such a way that the overvoltage and undervoltage alarm circuit of the power storage battery with the acousto-optic alarm function comprises an overvoltage and undervoltage detection circuit, a switch circuit, an overvoltage and undervoltage acousto-optic alarm circuit and an output normal display circuit; the overvoltage and undervoltage detection circuit comprises a voltage-stabilizing diode D1, a resistor R2, a resistor R3, a resistor R4, an integrated operational amplifier OP1 and a resistor R5, is used for detecting the output of the switch circuit and controlling the switch circuit to be turned on or off according to the detection result; the switching circuit comprises a resistor R7 connected to the base electrode, the resistor R7 is connected with the output end of the operational amplifier circuit, the emitting electrode of the triode Q1 is connected with the negative electrode of the power supply, and the collecting electrode of the triode Q1 is connected with the relay J and used for conducting opening and closing operations on the power supply output of the power battery.
Further, the switch circuit further comprises a diode D3 connected in parallel with the J coil of the relay to provide follow current when the relay is disconnected, and reverse breakdown of the triode Q1 is avoided.
Furthermore, the overvoltage and undervoltage acousto-optic alarm circuit is composed of two circuits, wherein one circuit is a red flash light-emitting diode connected with a resistor R8 in series and provides red flash alarm after the switch is disconnected, and the other circuit is a buzzer B and provides acousto-optic alarm after the switch circuit is disconnected.
Further, the output normal display circuit is composed of a resistor R9 and a green light emitting diode D4, and when the output of the power storage battery is normal, green light is emitted to indicate that the output of the power storage battery is normal.
If the parameters are used for power batteries with other voltage classes, the voltage stabilizing value of D1 and the parameters of the resistor R2, the resistor R3 and the resistor R4 can be modified according to the same principle.
The utility model discloses protection circuit simple structure uses an operational amplifier to realize the undervoltage duplicate protection of excessive pressure, and the protection is fast, has increased acousto-optic warning circuit and output normal display circuit in addition, provides acousto-optic warning after the undervoltage trouble takes place at the electric power battery, provides green normal signal under the electric power battery output normal condition, and the security performance of electric power battery can show the improvement, and audio-visual state display and malfunction alerting have also reached the purpose that improves the efficiency of patrolling and examining.
Drawings
Fig. 1 is an electrical schematic diagram of two specific circuits of the present invention.
In the figure: diode D1 is a zener diode 13.3V, capacitor C1 is 100UF/16V, capacitor C2 is a tile capacitor 224, resistor R1 is 0.5W10K, resistor R2 is 0.5W2.4K, resistor R W2.4K is 0.5W10 W2.4K, resistor R W2.4K is 0.5W1 W2.4K, resistor R W2.4K is 0.5W51 W2.4K, resistor R W2.4K is 0.5W10 W2.4K, resistor R W2.4K is 0.5W1 W2.4K, resistor R W2.4K is 0.5W2 W2.4K, resistor R W2.4K is 0.5W20 W2.4K, transistor Q W2.4K is a 100V medium power NPN, diode D W2.4K is a red flash led, diode D W2.4K is IN4007, diode D W2.4K is a green led, U W2.4K is a 7805 three-terminal zener integrated circuit, OP W2.4K is a single operational amplifier integrated circuit, P W2.4K is a P W2.4K and P W2.4K is connected to a battery P W2.4K and a P W2.4K output terminal.
Detailed Description
As shown in fig. 1, the utility model comprises an overvoltage and undervoltage detection circuit, a switch circuit, an overvoltage and undervoltage acousto-optic alarm circuit and an output normal display circuit;
the overvoltage and undervoltage detection circuit comprises a voltage-stabilizing diode D1, a resistor R2, a resistor R3, a resistor R4, an integrated operational amplifier OP1 and a resistor R5, is used for detecting the output of the switch circuit and controlling the switch circuit to be turned on or off according to the detection result;
the switching circuit comprises a resistor R7 connected to the base electrode, the resistor R7 is connected with the output end of the operational amplifier circuit, the emitting electrode of a triode Q1 is connected with the negative electrode of a power supply, and the collecting electrode of a triode Q1 is connected with a relay J and used for carrying out opening and closing operations on the power supply output of the power battery; the overvoltage and undervoltage acousto-optic alarm circuit comprises a voltage stabilizing diode D1, a resistor R2, an integrated operational amplifier OP1 and a resistor R5, and is used for detecting the output of the switch circuit and controlling the switch circuit to be turned on or off according to the detection result.
The working principle introduction is as follows: when the voltage of P1 drops below 10.5, the comparator outputs high level, the base of Q1 is high level, the collector of Q1 is conducted to ground, the relay J is electrified and conducted, the normally closed contact of the battery output path relay J-1 is disconnected for output, because the comparator is added with a positive feedback resistor R5, the circuit has a return difference value, at this time, if P1 rises to 12.2V, the comparator reverses and outputs low level, the base of Q1 is low level, the collector of Q1 is disconnected to ground, the relay J is disconnected in power failure, the normally closed contact of the battery output path relay J-1 is attracted for output, and the power battery automatically outputs to the outside again. When the voltage of P1 rises to 14.8 or above for some reason, D1 is conducted, the comparator outputs high level, the base of Q1 is high level, the collector of Q1 is conducted to the ground, the relay J is electrified and conducted, and the battery output path relay normally closed contact J-1 disconnects the output. When the voltage value of D1 is 13.3V, the protection threshold is 14.8V, if no suitable voltage-stabilizing tube is available, two 10V +3.3V series-connected tubes can be used, and the functions are the same.
Claims (4)
1. An over-voltage and under-voltage alarm circuit of an electric storage battery with an acousto-optic alarm function is characterized by comprising an over-voltage and under-voltage detection circuit, a switch circuit, an over-voltage and under-voltage acousto-optic alarm circuit and an output normal display circuit;
the overvoltage and undervoltage detection circuit comprises a voltage-stabilizing diode D1, a resistor R2, a resistor R3, a resistor R4, an integrated operational amplifier OP1 and a resistor R5, is used for detecting the output of the switch circuit and controlling the switch circuit to be turned on or off according to the detection result;
the switching circuit comprises a resistor R7 connected to the base electrode, the resistor R7 is connected with the output end of the operational amplifier circuit, the emitting electrode of the triode Q1 is connected with the negative electrode of the power supply, and the collecting electrode of the triode Q1 is connected with the relay J and used for conducting opening and closing operations on the power supply output of the power battery.
2. The electric power storage battery over-voltage and under-voltage alarm circuit with the acousto-optic alarm function as claimed in claim 1, characterized in that the switch circuit further comprises a diode D3 connected in parallel with a J coil of the relay to provide a follow current when the relay is turned off, so as to prevent the reverse breakdown of the transistor Q1.
3. The electric power storage battery over-voltage and under-voltage alarm circuit with the acousto-optic alarm function as claimed in claim 2, characterized in that the over-voltage and under-voltage acousto-optic alarm circuit is composed of two circuits, one circuit is a red flash light emitting diode connected in series with a resistor R8 and provides a red flash alarm after the switch is turned off, and the other circuit is a buzzer B and provides an acousto-optic alarm after the switch is turned off.
4. The electric power storage battery over-voltage and under-voltage alarm circuit with the acousto-optic alarm function as claimed in claim 1, characterized in that the output normal display circuit further comprises a resistor R9 and a green light emitting diode D4, and the output normal display circuit emits green light when the output of the electric power storage battery is normal, so as to indicate that the output of the electric power storage battery is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021701104.2U CN212751785U (en) | 2020-08-16 | 2020-08-16 | Electric power storage battery overvoltage and undervoltage alarm circuit with acousto-optic alarm function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021701104.2U CN212751785U (en) | 2020-08-16 | 2020-08-16 | Electric power storage battery overvoltage and undervoltage alarm circuit with acousto-optic alarm function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212751785U true CN212751785U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021701104.2U Active CN212751785U (en) | 2020-08-16 | 2020-08-16 | Electric power storage battery overvoltage and undervoltage alarm circuit with acousto-optic alarm function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212751785U (en) |
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2020
- 2020-08-16 CN CN202021701104.2U patent/CN212751785U/en active Active
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