CN212570011U - Storage battery system fire detection device based on power line carrier communication - Google Patents
Storage battery system fire detection device based on power line carrier communication Download PDFInfo
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- CN212570011U CN212570011U CN202021460930.2U CN202021460930U CN212570011U CN 212570011 U CN212570011 U CN 212570011U CN 202021460930 U CN202021460930 U CN 202021460930U CN 212570011 U CN212570011 U CN 212570011U
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Abstract
The utility model discloses a storage battery system fire detection device based on power line carrier communication, which comprises a sensor group used for collecting fire information, a data processing unit and a power supply circuit used for supplying power to the fire detection device; the output end of the sensor group is electrically connected with the input end of the data processing unit, the output end of the data processing unit is connected with the input end of the power carrier communication circuit, and the output end of the power carrier communication circuit is connected with the power supply circuit; and an overcurrent and short-circuit protection circuit is arranged in the power supply circuit. The utility model can transmit data only by wires, and is not affected by the wiring of the wired network and the environment of the wireless network; through the overcurrent and short-circuit protection circuit, the output voltage can be maintained for a period of time during overload, the power consumption of the system is reduced, the failure rate of the electric energy meter in field operation can be reduced, and public energy is saved; and the RCD circuit is connected, so that the output voltage ripple is reduced, and the stable and reliable operation of the power supply is ensured.
Description
Technical Field
The utility model relates to a fire monitoring technology field, concretely relates to battery system fire detection device based on power line carrier communication.
Background
With the development of storage battery technology, the reduction of cost and the requirements of energy conservation and environmental protection, storage battery systems are more and more widely used in the fields of electric energy storage, standby power supplies, electric automobiles and the like, but the storage batteries have a safety problem which is not negligible, especially in the occasions of large-scale application. The fire accident of the storage battery system occurs many times at home and abroad, which causes the worry of people about the fire safety of the storage battery.
At present, the conventional detection device for building fire is adopted for the fire of the storage battery system, the difference with the characteristics of the storage battery fire is large, early warning and safety protection of the fire are difficult to realize, and the detection and protection of the storage battery fire system are not suitable.
The power line carrier communication circuit is a transmission medium using a power line as a carrier signal, and is widely used in recent years. The communication quality of the power carrier communication circuit is greatly influenced by a power supply, the ripple of the power supply can bring serious interference to circuits such as a filter, a detection, an oscillation and a frequency modulator in the power carrier communication circuit, and the ripple needs to be reduced as much as possible in the design of the power supply to ensure the reliable operation of carrier communication, so that the requirement that the power supply ripple Vp-p is less than 1 per thousand of the output voltage is met; in addition, in the practical application process, the power line is easily subjected to various interferences, or carrier communication faults are caused by manual misoperation, the over-current and short-circuit phenomena occur, the normal work of the electric energy meter is not influenced for protection, the over-current and short-circuit protection must be added at the output end of the power supply, the conventional over-current and short-circuit protection has the over-current and short-circuit protection functions, but the quick turn-off and the quick recovery cannot be realized due to the existence of the parasitic capacitor of the switching tube, in addition, the output voltage is directly turned off during the over-current, the voltage drop is consumed on the sampling resistor, and the power consumption is very.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome not enough of above technique, provide a battery system fire detection device based on power line carrier communication.
The utility model overcomes the technical scheme that its technical problem adopted is:
a storage battery system fire detection device based on power line carrier communication at least comprises a sensor group used for collecting fire information, a data processing unit and a power supply circuit used for supplying power to the fire detection device;
the output end of the sensor group is electrically connected with the input end of the data processing unit, the output end of the data processing unit is connected with the input end of the power carrier communication circuit, and the output end of the power carrier communication circuit is connected with the power supply circuit;
the power supply circuit is internally provided with an overcurrent and short-circuit protection circuit, the overcurrent and short-circuit protection circuit comprises a triode Q1, a Q2 and a Q3, an undervoltage detection circuit, resistors R1, R2, R3 and R4, and capacitors C1 and C2, the undervoltage detection circuit comprises an adjustable voltage-regulator tube U1, voltage-dividing resistors R5 and R6, wherein one end of the resistor R1 and an emitting electrode of the triode Q1 are both connected with a power supply input end UinThe other end of the resistor R1 is respectively connected with the base of a triode Q1, one end of a resistor R2 and the emitter of a triode Q2, the collector of the triode Q1 is respectively connected with the base of a triode Q3, the other end of a resistor R2 and one end of a resistor R3, the other end of the resistor R3 is respectively connected with one end of a capacitor C1 and the cathode of an adjustable voltage regulator U1, the base of a triode Q2 is respectively connected with the emitter of the triode Q3 and one end of a resistor R4, and the collector of the triode Q2 is respectively connected with the collector of a triode Q3The other end of the capacitor C1, the anode of the adjustable voltage-regulator tube U1, the other end of the resistor R4, the other end of the resistor R6 and the other end of the capacitor C2 are all grounded.
Further, the over-current and short-circuit protection circuit further comprises an RCD circuit, the RCD circuit comprises a capacitor C3, a diode D1 and a resistor R7, the capacitor C3 and the resistor R7 are connected to the two ends of the positive electrode and the negative electrode of the power supply in parallel, the positive electrode of the diode D1 is connected with the collector of the triode Q2 and one end of the capacitor C3, the negative electrode of the diode D1 is connected with one end of the resistor R7, and the other end of the capacitor C3 and the other end of the resistor R7 are both grounded.
Further, the transistors Q1, Q2 and Q3 are all PNP transistors.
Further, the sensor group at least comprises a gas sensor, a smoke sensor and a temperature sensor, and the output end of the gas sensor, the output end of the smoke sensor and the output end of the temperature sensor are respectively and electrically connected with the input end of the data processing unit.
Further, the data processing unit adopts an embedded controller.
Further, the power supply circuit adopts a 220V power line.
The utility model has the advantages that:
1. the utility model discloses a power line carrier communication circuit realizes power line carrier communication technique, with the help of the 220V power cord of fire detection device, transmits sensor signal and fire alarm signal, need not to arrange communication line in addition like this, as long as there is the electric wire, can carry out data transfer, can not receive the wiring influence of wired network and the environmental impact of wireless network, realizes covering on a large scale; not only has complete functions and low cost, but also has flexible system organization.
2. The utility model discloses an overcurrent and short-circuit protection circuit compare in conventional overcurrent and short-circuit protection circuit, have increased triode Q2 and undervoltage detection circuit, can maintain output voltage a period when transshipping, and the circuit after the improvement has greatly reduced system power consumption, and the reduction electric energy meter that can show reduces the unnecessary loss effectively at the fault rate of site operation to practice thrift public energy.
3. The utility model discloses an overcurrent and short-circuit protection circuit access RCD circuit, when reducing the output voltage ripple, prevent that the carrier wave terminal voltage from backward irritating to the front end power, guarantee the reliable and stable operation of power.
Drawings
Fig. 1 is a schematic block diagram of a fire detection device of a storage battery system based on power line carrier communication according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of an overcurrent and short-circuit protection circuit according to an embodiment of the present invention.
Detailed Description
In order to facilitate better understanding of the present invention for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, which are given by way of illustration only and thus do not limit the scope of the present invention.
As shown in FIG. 1, the utility model discloses a battery system fire detection device based on power line carrier communication, including the power supply circuit who is used for gathering the sensor group, data processing unit, power line carrier communication circuit of fire information and supplies power for fire detection device at least.
In this embodiment, according to the characteristics of lithium battery fire, adopt gas sensor, smoke transducer and temperature sensor to gather fire information at least, so sensor group includes gas sensor, smoke transducer and temperature sensor at least, and gas sensor's output, smoke transducer's output and temperature sensor's output are connected with data processing unit's input electricity respectively, and data processing unit's output is connected with power carrier communication circuit's input, and power carrier communication circuit's output is connected with supply circuit.
Preferably, in this embodiment, the gas sensor, the smoke sensor and the temperature sensor are integrated in the fire detection device, and are used for collecting information around the storage battery, including gas, temperature and smoke information, where the information battery has significant changes in different stages of normal operation, thermal runaway, fire and the like, and the state of the storage battery can be accurately judged according to the change information, so as to predict and detect the fire condition, and the states of the sensors can also be used as complementary information, thereby effectively avoiding misjudgment of fire; the power supply circuit adopts a 220V power line. Data collected by the sensor group are processed by the data processing unit and then pass through the power carrier communication circuit, and fire information is sent out by utilizing a 220V power line for supplying power to the fire detection device.
Preferably, in this embodiment, the data processing unit employs an embedded controller to process and judge the information collected by the sensor group, give out early warning and judgment to the fire, and give out multiple levels of warning. The data processing unit also transmits the acquired information and the judgment warning information to the upper-level system through a 220V power line, so that the requirement that another communication line is additionally arranged in the conventional system is avoided, and the wiring complexity is reduced.
In this embodiment, the power carrier communication technology is implemented by the power carrier communication circuit, and the sensor signal and the fire alarm signal are transmitted by the 220V power line of the fire detection device, so that a communication line does not need to be additionally arranged, data transmission can be performed as long as an electric wire is present, and large-range coverage can be achieved without being affected by the wiring of a wired network and the environment of a wireless network. Therefore, compared with other fire alarm systems, the independent storage battery system fire detection device based on power carrier communication has complete functions, low cost and flexible system organization.
Although the conventional overcurrent and short-circuit protection has the overcurrent and short-circuit protection functions, the quick turn-off and quick recovery cannot be realized due to the existence of the parasitic capacitor of the switching tube, and in addition, the output voltage is directly turned off during overcurrent, the voltage drop is consumed on the sampling resistor, and the power consumption is very high. Therefore, the present embodiment provides a new over-current and short-circuit protection circuit, which is disposed in the power supply circuit.
In this example, for exampleAs shown in fig. 2, the over-current and short-circuit protection circuit includes transistors Q1, Q2, and Q3, an under-voltage detection circuit, resistors R1, R2, R3, and R4, a capacitor C1, and a polar electrolytic capacitor C2, where the under-voltage detection circuit includes a precision adjustable voltage regulator tube U1, and voltage dividing resistors R5 and R6. The resistor R1 is a current sampling resistor, one end of the resistor R1 and the emitter of the triode Q1 are connected with the input end U of the power supplyinThe other end of the resistor R1 is respectively connected with the base of a triode Q1, one end of a resistor R2 and the emitter of a triode Q2, the collector of a triode Q1 is respectively connected with the base of a triode Q3, the other end of a resistor R2 and one end of a resistor R3, the other end of a resistor R3 is respectively connected with one end of a capacitor C1 and the cathode of a precise adjustable voltage regulator U1, the base of a triode Q2 is respectively connected with the emitter of a triode Q3 and one end of a resistor R4, the collector of a triode Q2 is respectively connected with the collector of a triode Q3, one end of a resistor R5 and one end of a capacitor C2, the other end of a resistor R5 is connected with one end of a resistor R6, the adjustable end of a precise adjustable voltage regulator U1 is connected between a resistor R5 and a resistor R6, the other end of a capacitor C1 and the anode of a precise adjustable voltage regulator U1, The other end of the resistor R4, the other end of the resistor R6 and the other end of the capacitor C2 are all grounded. In this embodiment, the transistors Q1, Q2, and Q3 are all PNP transistors.
The working principle of the storage battery system fire detection device based on power line carrier communication described in this embodiment is as follows: the current sampling resistor R1 is set to be 1 omega, when the load current is smaller than 700mA, the voltage at two ends of the resistor R1 is smaller than the starting voltage of the triode Q1, the triode Q1 is cut off, the collector of the triode Q1 is at a low level, the voltage of the emitters of the triodes Q2 and Q3 is higher than the base voltage by 0.7V, and therefore the triodes Q2 and Q3 are conducted; and the triode Q3 is conducted, so that the triode Q2 enters a saturated conduction state, the power supply works normally, and the undervoltage detection circuit does not work. When the load current is larger than 700mA, the voltage at two ends of the resistor R1 exceeds 0.7V, the triode Q1 is conducted, the collector of the triode Q1 is at a high level, the triode Q2 is in a cut-off state and cannot provide current for the base of the triode Q3, therefore, the base of the triode Q2 can only enter an amplification state through the current provided by the resistor R2, the output current after overload and short circuit can be set through adjusting the resistance value of the resistor R4, meanwhile, undervoltage protection also starts to work, and the entering of a protection state is accelerated.
As a preferable scheme of this embodiment, the over-current and short-circuit protection circuit further includes an RCD circuit, where the RCD circuit includes a capacitor C3, a diode D1, and a resistor R7, the capacitor C3 and the resistor R7 are both connected in parallel to two ends of a positive electrode and a negative electrode of the power supply, an anode of the diode D1 is connected to a collector of the transistor Q2 and one end of the capacitor C3, a cathode of the diode D1 is connected to one end of the resistor R7, and the other end of the capacitor C3 and the other end of the resistor R7 are both grounded. The RCD circuit is connected, output voltage ripples are reduced, meanwhile, carrier terminal voltage is prevented from flowing back to a front-end power supply, and stable and reliable operation of the power supply is guaranteed.
Compared with the conventional overcurrent and short-circuit protection circuit, the overcurrent and short-circuit protection circuit has the advantages that the triode Q2 and the undervoltage detection circuit are added, the output voltage can be maintained for a period of time when the overcurrent and short-circuit protection circuit is overloaded, the power consumption of a system is greatly reduced by the improved circuit, the failure rate of the electric energy meter in field operation can be obviously reduced, unnecessary loss is effectively reduced, and therefore public energy is saved.
The foregoing has described only the basic principles and preferred embodiments of the present invention and numerous changes and modifications may be made by those skilled in the art in light of the above teachings and shall fall within the scope of the present invention.
Claims (6)
1. A storage battery system fire detection device based on power line carrier communication at least comprises a sensor group used for collecting fire information, a data processing unit and a power supply circuit used for supplying power to the fire detection device; it is characterized in that the preparation method is characterized in that,
the output end of the sensor group is electrically connected with the input end of the data processing unit, the output end of the data processing unit is connected with the input end of the power carrier communication circuit, and the output end of the power carrier communication circuit is connected with the power supply circuit;
the power supply circuit is internally provided with an overcurrent and short-circuit protection circuit, the overcurrent and short-circuit protection circuit comprises a triode Q1, a Q2 and a Q3, an undervoltage detection circuit, resistors R1, R2, R3 and R4, and capacitors C1 and C2, the undervoltage detection circuit comprises an adjustable voltage-regulator tube U1, voltage-dividing resistors R5 and R6, wherein one end of the resistor R1 and an emitting electrode of the triode Q1 are both connected with a power supply input end UinThe other end of the resistor R1 is respectively connected with the base of a triode Q1, one end of a resistor R2 and the emitter of a triode Q2, the collector of the triode Q1 is respectively connected with the base of a triode Q3, the other end of a resistor R2 and one end of a resistor R3, the other end of the resistor R3 is respectively connected with one end of a capacitor C1 and the cathode of an adjustable voltage regulator tube U1, the base of the triode Q2 is respectively connected with the emitter of the triode Q3 and one end of a resistor R4, the collector of the triode Q2 is respectively connected with the collector of a triode Q3, one end of a resistor R5 and one end of a capacitor C2, the other end of a resistor R5 is connected with one end of a resistor R6, the adjustable end of an adjustable voltage regulator tube U1 is connected between the resistor R5 and the resistor R6, the other end of the capacitor C1, the anode of an adjustable voltage regulator tube U1 and the other end of the adjustable voltage regulator tube R4, The other end of the resistor R6 and the other end of the capacitor C2 are both grounded.
2. The storage battery system fire detection device based on power carrier communication as claimed in claim 1, wherein the over-current and short-circuit protection circuit further comprises an RCD circuit, the RCD circuit comprises a capacitor C3, a diode D1 and a resistor R7, the capacitor C3 and the resistor R7 are both connected in parallel to the positive and negative ends of the power supply, the positive electrode of the diode D1 is connected to the collector of the transistor Q2 and to one end of the capacitor C3, the negative electrode of the diode D1 is connected to one end of the resistor R7, and the other end of the capacitor C3 and the other end of the resistor R7 are both grounded.
3. The power-carrier-communication-based fire detection device for the storage battery system as claimed in claim 1, wherein the transistors Q1, Q2 and Q3 are all PNP-type transistors.
4. A power carrier communication-based battery system fire detection device according to any one of claims 1-3, wherein the sensor group comprises at least a gas sensor, a smoke sensor and a temperature sensor, and the output of the gas sensor, the output of the smoke sensor and the output of the temperature sensor are electrically connected with the input of the data processing unit, respectively.
5. The power carrier communication-based storage battery system fire detection device according to claim 1, wherein the data processing unit employs an embedded controller.
6. The power-carrier-communication-based storage battery system fire detection device as claimed in claim 1, wherein the power supply circuit adopts a 220V power line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021460930.2U CN212570011U (en) | 2020-07-22 | 2020-07-22 | Storage battery system fire detection device based on power line carrier communication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021460930.2U CN212570011U (en) | 2020-07-22 | 2020-07-22 | Storage battery system fire detection device based on power line carrier communication |
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| CN212570011U true CN212570011U (en) | 2021-02-19 |
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| CN202021460930.2U Expired - Fee Related CN212570011U (en) | 2020-07-22 | 2020-07-22 | Storage battery system fire detection device based on power line carrier communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113112730A (en) * | 2021-04-06 | 2021-07-13 | 重庆电子工程职业学院 | Intelligent alarm device based on Internet of things |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113112730A (en) * | 2021-04-06 | 2021-07-13 | 重庆电子工程职业学院 | Intelligent alarm device based on Internet of things |
| CN113112730B (en) * | 2021-04-06 | 2022-11-01 | 重庆电子工程职业学院 | Intelligent alarm device based on Internet of things |
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