CN214226970U

CN214226970U - Hydrogen fuel cell monitoring system

Info

Publication number: CN214226970U
Application number: CN202120227081.4U
Authority: CN
Inventors: 杨汉卿; 夏月
Original assignee: New Energy Technology Shandong Co ltd
Current assignee: New Energy Technology Shandong Co ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-09-17
Anticipated expiration: 2031-01-26

Abstract

The hydrogen fuel cell monitoring system comprises a voltage-stabilized power supply, an electromagnetic valve and a short message module; the device is also provided with a temperature detection circuit, a voltage detection circuit, a gas leakage circuit, a pressure detection circuit and a remote control circuit; the temperature detection circuit comprises a thermistor and a trigger sub-circuit, and the thermistor is arranged at the outer side end of the shell of the hydrogen fuel cell; the pressure detection circuit comprises a pressure switch and a control sub-circuit, the electromagnetic valve is connected in series between the hydrogen pipe and the hydrogen input pipe, and the pressure switch is arranged at the side end of the hydrogen pipe; the voltage-stabilizing power supply, the short message module, the trigger sub-circuit, the voltage detection circuit, the gas leakage circuit, the control sub-circuit and the remote control circuit are arranged in the element box and are electrically connected with the thermistor and the pressure switch. This is novel when operating temperature is unusual, output voltage crosses lowly and takes place hydrogen leakage, hydrogen and stop the gas, can give the administrator suggestion through the SMS mode, and the administrator can also make hydrogen fuel cell stop pile, prevent the fault amplification.

Description

Hydrogen fuel cell monitoring system

Technical Field

The utility model relates to a supporting equipment technical field who uses of hydrogen fuel cell, especially a hydrogen fuel cell monitored control system.

Background

A Fuel Cell (Fuel Cell) is a power generation device that directly converts chemical energy existing in Fuel and oxidant into electric energy, and has the advantages of high electric energy conversion efficiency (the theoretical power generation efficiency can reach 85% -90%), environmental protection and the like, so the Fuel Cell has wider application in national defense, traffic and industry. The fuel cell using hydrogen as fuel has a higher power density than other fuel cells, and the discharged by-products are water or water vapor, which does not cause any environmental pollution, and thus is widely used in fuel cells.

In order to ensure the normal operation of the hydrogen fuel cell, a monitoring device is generally installed in the prior art to monitor the operating condition of the hydrogen fuel cell. The monitoring equipment used by the existing hydrogen fuel cell can only monitor the working temperature and the output voltage of the hydrogen fuel cell generally due to the structure limitation, and the problem of single monitoring data exists. In addition, the existing monitoring equipment only has the function of on-site alarming when the hydrogen fuel cell is monitored to have a fault, so that when relevant management personnel are not on site, the fault condition of the hydrogen fuel cell cannot be known and corresponding treatment is carried out. Based on the above, it is necessary to provide a hydrogen fuel cell monitoring system which has more comprehensive monitoring data and can give a prompt to the relevant manager at any time and any place when the hydrogen fuel cell fails.

SUMMERY OF THE UTILITY MODEL

In order to overcome the monitoring facilities that current hydrogen fuel cell used and restrict because of the structure, exist as the background the drawback, the utility model provides a under relevant circuit and mechanism combined action, not only can monitor hydrogen fuel cell's operating temperature, output voltage, can also monitor whether hydrogen fuel cell takes place hydrogen and reveals and the input pressure of hydrogen, at operating temperature anomaly, output voltage is low and take place hydrogen and leak, when hydrogen stops gas, can give the suggestion of distal end managers the very first time through the SMS mode, distal end managers can also turn off the hydrogen valve as required long-rangely and make hydrogen fuel cell stop piling, prevent the fault amplification, from this for managers has brought the facility, and the hydrogen fuel cell monitored control system of hydrogen fuel cell normal work has been guaranteed.

The utility model provides a technical scheme that its technical problem adopted is:

the hydrogen fuel cell monitoring system comprises a voltage-stabilized power supply, an electromagnetic valve and a short message module; it is characterized by also comprising a temperature detection circuit, a voltage detection circuit, a gas leakage circuit, a pressure detection circuit and a remote control circuit; the temperature detection circuit comprises a thermistor and a trigger sub-circuit, and the thermistor is arranged on the hydrogen fuel cell; the pressure detection circuit comprises a pressure switch and a control sub-circuit, the electromagnetic valve is connected between a hydrogen gas supply pipe and a hydrogen gas input pipe of the hydrogen fuel cell in series, and the pressure switch is arranged at the side end of the hydrogen gas supply pipe; the voltage-stabilizing power supply, the short message module, the trigger sub-circuit of the temperature detection circuit, the voltage detection circuit, the gas leakage circuit, the control sub-circuit of the pressure detection circuit and the remote control circuit are arranged in the element box; the gas leakage circuit comprises a gas-sensitive sensing device, an adjustable resistor, a relay and a time-base integrated circuit, wherein the gas-sensitive sensing device is electrically connected with the adjustable resistor, the relay and the time-base integrated circuit; the power output end of the voltage-stabilized power supply is electrically connected with the two power input ends of the short message module, the temperature detection circuit, the voltage detection circuit, the gas leakage circuit, the pressure detection circuit and the remote control circuit respectively; the signal output ends of the temperature detection circuit, the voltage detection circuit, the gas leakage circuit and the pressure detection circuit are respectively and electrically connected with the multi-path signal input end of the short message module, the power output end of the remote control circuit is electrically connected with the power input end of the electromagnetic valve, and the signal input end of the voltage detection circuit is respectively and electrically connected with the two poles of the power supply of the hydrogen fuel cell.

Further, the stabilized voltage supply is an alternating current to direct current switching power supply module.

Further, the electromagnetic valve is a normally open valve core electromagnetic valve; the short message module is a short message alarm module.

Furthermore, the trigger sub-circuit of the temperature detection circuit comprises an adjustable resistor, a relay and an NPN triode, the adjustable resistor, the relay, the NPN triode and the thermistor are electrically connected, one end of the thermistor is connected with the input end of a positive power supply of the relay, the other end of the thermistor is connected with one end of the adjustable resistor, the other end of the adjustable resistor is connected with a base electrode of the NPN triode, a collector electrode of the NPN triode is connected with the input end of a negative power supply of the relay, and an emitting electrode of the NPN triode is connected with the input end of a control power supply of the relay.

Further, the voltage detection circuit comprises an electrolytic capacitor, an adjustable resistor, an NPN triode and a relay, the electrolytic capacitor, the adjustable resistor, the NPN triode and the relay are electrically connected, the positive electrode of the electrolytic capacitor is connected with one end of the adjustable resistor, the other end of the adjustable resistor is connected with the base electrode of the NPN triode, the collector electrode of the NPN triode is connected with the negative power supply input end of the relay, and the negative electrode of the electrolytic capacitor is connected with the emitter electrode of the NPN triode and the control power supply input end of the relay.

Further, in the gas leakage circuit, a positive power input end of the gas sensor is connected with one end of a first resistor, the other end of the first resistor is connected with a first measuring electrode of the gas sensor, a second measuring electrode of the gas sensor is connected with one end of a second resistor and a trigger end of the time base integrated circuit, the other end of the second resistor is connected with one end of an adjustable resistor, a negative power input end of the gas sensor is connected with the other end of the adjustable resistor, a negative power input end of the time base integrated circuit and a relay control power input end, a threshold end of the time base integrated circuit is connected with a reset end and a positive power input end, a positive power input end of a relay, and an output end of the time base integrated circuit is connected with a negative power input end of the relay.

Furthermore, the control sub-circuit of the pressure detection circuit comprises a resistor, an NPN triode and a relay, the resistor, the NPN triode, the relay and the pressure switch are electrically connected, one end of the pressure switch is connected with one end of the resistor, the other end of the resistor is connected with the base electrode of the NPN triode, the collector electrode of the NPN triode is connected with the negative power supply input end of the relay, and the emitter electrode of the NPN triode is connected with the control power supply input end of the relay.

Further, the remote control circuit comprises a remote wireless controller, a resistor, an NPN triode and a relay, the remote wireless controller is electrically connected with the resistor, the NPN triode and the relay, a positive power input end of the remote wireless controller is connected with a positive control power input end and a positive power input end of the relay, one output end of the remote wireless controller is connected with one end of the resistor, the other end of the resistor is connected with a base electrode of the NPN triode, a collector electrode of the NPN triode is connected with a negative power input end of the relay, and a negative power input end of the remote wireless controller is connected with an emitter electrode of the NPN triode and a negative control power input end of the relay.

This novel beneficial effect is: this is novel in, temperature detect circuit can real-time detection hydrogen fuel cell's casing temperature, voltage detect circuit can real-time detection hydrogen fuel cell's output voltage, gas leakage circuit can real-time detection hydrogen fuel cell whether take place hydrogen leakage around, pressure detection circuit can real-time detection hydrogen's input pressure, it is unusual at hydrogen fuel cell operating temperature, output voltage crosses low and take place hydrogen leakage, during hydrogen stops the gas, this novel ability very first time gives distal end managers suggestion through the SMS mode, distal end managers can also make hydrogen fuel cell stop through the long-range shutoff hydrogen valve of remote control circuit through the cell-phone of body as required, the fault amplification has been prevented. The novel hydrogen fuel cell brings convenience to managers and ensures the normal work of the hydrogen fuel cell. Based on the above, this is novel has good application prospect.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a block diagram illustrating the structure of the present invention.

Fig. 3 is a circuit diagram of the present invention.

Detailed Description

As shown in fig. 1 and 2, the hydrogen fuel cell monitoring system includes a regulated power supply 1, an electromagnetic valve 2, and a short message module 3; the device is also provided with a temperature detection circuit, a voltage detection circuit 5, a gas leakage circuit 6, a pressure detection circuit and a remote control circuit 8; the temperature detection circuit comprises a thermistor 41 and a trigger sub-circuit 52, wherein the thermistor 41 is arranged at the outer end of the shell of the hydrogen fuel cell; the pressure detection circuit comprises a pressure switch 71 and a control sub-circuit 72, the electromagnetic valve 2 is connected in series between a hydrogen supply pipe 21 (externally inputting hydrogen) and a hydrogen input pipe 22 (connecting a hydrogen channel of the hydrogen fuel cell) of the hydrogen fuel cell through a pipeline joint, an internal thread opening is arranged at the side end of the hydrogen supply pipe 21, and the pressure switch 71 is screwed into an internal thread of the internal thread opening through an external thread at the gas inlet end of the pressure switch and is installed at the side end of the hydrogen supply pipe 21; the stabilized voltage power supply 1, the short message module 3, the trigger sub-circuit 42 of the temperature detection circuit, the voltage detection circuit 5, the gas leakage circuit 6, the control sub-circuit 72 of the pressure detection circuit and the remote control circuit 8 are arranged on a circuit board in the element box 9 and are connected with the thermistor 31 and the pressure switch 71 through leads.

As shown in FIGS. 1, 2 and 3, regulated power supply A1 is a finished product of a 220V/12V/100W AC-to-DC 12V switching power supply module. The electromagnetic valve DC is a finished product of a normally open valve core electromagnetic valve with working voltage of direct current 12V. The short message module A4 is a finished product of a short message alarm module of a GSM DTU SIM800C, the finished product of the short message alarm module has two

power input ends

1 and 2, eight signal input ends 3-10, after each signal input end inputs a low level signal, the finished product of the short message alarm module can send a short message through a wireless mobile network, the finished product of the short message alarm module can store a plurality of short messages with different contents (in this embodiment, managers can pre-edit four short messages through the functions of the finished product of the short message alarm module, and after the contents are respectively 'gas leakage', 'low voltage', 'high temperature', 'insufficient hydrogen quantity'), the four signal input ends 3-6 of the short message alarm module are respectively output low level signals, and the short message alarm module can respectively send four short messages with different contents. The trigger sub-circuit of the temperature detection circuit comprises an adjustable resistor RP1, a relay K1 and an NPN triode Q, wherein the adjustable resistor RP1, the relay K1 and the NPN triode Q are connected through circuit board wiring and are connected with a thermistor RT through a lead, one end of the thermistor RT is connected with the positive power supply input end of the relay K1, the other end of the thermistor RT is connected with one end of the adjustable resistor RP1, the other end of the adjustable resistor RP1 is connected with the base electrode of the NPN triode Q, the collector electrode of the NPN triode Q is connected with the negative power supply input end of the relay K1, and the emitter electrode of the NPN triode Q is connected with the control power supply input end of the relay K1. The voltage detection circuit comprises an electrolytic capacitor C, an adjustable resistor RP2, an NPN triode Q1 and a relay K2, wherein the electrolytic capacitor C, the adjustable resistor RP2, the NPN triode Q1 and the relay K2 are connected through circuit board wiring, the anode of the electrolytic capacitor C is connected with one end of an adjustable resistor RP2, the other end of the adjustable resistor RP2 is connected with the NPN triode base Q1, the collector of the NPN triode Q1 is connected with the negative power supply input end of the relay K2, and the cathode of the electrolytic capacitor C is connected with the emitter of the NPN triode Q1 and the control power supply input end of the relay K2.

As shown in fig. 1, 2, and 3, the gas leakage circuit includes a gas sensor T and an adjustable resistor RP3, resistors R1 and R3, a relay K3, a time-based integrated circuit A3, the gas sensor T and an adjustable resistor RP3, resistors R1 and R3, a relay K3, and a time-based integrated circuit A3 connected by circuit board wiring, a probe of the gas sensor T is located at the rear end of an opening at the front end of a cell box, a pin 1 at the positive power input end of the gas sensor T is connected with one end of a first resistor R1, the other end of the first resistor R1 is connected with a pin 3 at the first measurement electrode of the gas sensor T, a pin 4 at the second measurement electrode of the gas sensor T is connected with one end of a second resistor R3 and a pin 2 at the trigger end of the time-based integrated circuit A3, the other end of the second resistor R3 is connected with one end of the adjustable resistor RP3, a pin 2 at the negative power input end of the sensor T and the other end of the adjustable resistor RP3, The negative power supply input end 1 pin and the relay K3 control power supply input end of the time base integrated circuit A3 are connected, the threshold end 6 pin and the reset end 4 pin of the time base integrated circuit A3, the positive power supply input end 8 pin and the relay K3 positive power supply input end are connected (and connected with the other end of the resistor R1), and the output end 3 pin and the relay K3 negative power supply input end of the time base integrated circuit A3 are connected. The control sub-circuit of the pressure detection circuit comprises a resistor R2, an NPN triode Q2 and a relay K4, the resistor R2, the NPN triode Q2 and the relay K4 are connected through circuit board wiring and are connected with a pressure switch W through a lead, one end of the pressure switch W is connected with one end of a resistor R2, the other end of the resistor R2 is connected with a base of the NPN triode Q2, a collector of the NPN triode Q2 is connected with a negative power supply input end of the relay K4, and an emitter of the NPN triode Q2 is connected with a control power supply input end of the relay K4. The remote control circuit comprises a finished remote wireless controller product A5 of model CL4-GPRS, a resistor R4, an NPN triode Q3 and a relay K5, wherein the finished remote wireless controller product A5 is provided with two

power input ends

1 and 2 pins, four control power output terminals are provided, the working voltage is direct current 12V, in use, through the existing mature mobile phone APP technology, a user can respectively send out control commands through a mobile phone APP at the far end through a wireless mobile network, after receiving the control commands, the remote wireless controller can respectively control the output ends of the four control power outputs to output or not output power, the remote wireless controller is connected with the resistor R4, the NPN triode Q3 and the relay K5 through conducting wires, the pin 1 of the positive power input end of the remote wireless controller A5 is connected with the positive control power input end of the relay K4 and the positive power input end, the pin 3 of one output end of the remote wireless controller A6 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with the base electrode of an NPN triode Q3, the collector electrode of the NPN triode Q3 is connected with the negative power input end of the relay K4, and the pin 2 of the negative power input end of the remote wireless controller A5 is connected with the emitter electrode of the NPN triode Q3 and the negative control power input end of the relay K4.

As shown in fig. 1, 2 and 3,

pins

1 and 2 of a power input end of a regulated power supply a1 and two poles of an alternating current 220V power supply are respectively connected through leads.

Pins

3 and 4 of a power output end of a voltage-stabilized power supply A1,

pins

1 and 2 of a power input end of a short message module A4, one end of a thermistor RT at the two ends of the power input end of a temperature detection circuit and an emitting electrode of an NPN triode Q, the positive power input end of a relay K2 at the two ends of the power input end of a voltage detection circuit and an emitting electrode of an NPN triode Q1, the other end of a resistor R1 at the two ends of the power input end of a gas leakage circuit and a control power input end of a relay K3, the other end of a pressure switch W at the two ends of the power input end of a pressure detection circuit and an emitting electrode of an NPN triode Q2, and the positive power input end of a relay K4 and an emitting electrode of an NPN triode Q3 at the two ends of the power input end of a remote control circuit are respectively connected through leads. The signal output end relay K1 normally open contact end of the temperature detection circuit, the signal output end relay K2 normally closed contact end of the voltage detection circuit, the signal output end relay K3 normally open contact end of the gas leakage circuit, the signal output end relay K4 normally closed contact end of the pressure detection circuit and the four-way

signal input end

5, 4, 3 and 6 pins of the short message module A4 are connected through leads respectively, the normally open contact end and the negative power input end of the power output end relay K4 of the remote control circuit and the power input end of the electromagnetic valve DC are connected through leads respectively, and the positive electrode and the negative electrode of the electrolytic capacitor C of the signal input end of the voltage detection circuit and the two power supply electrodes of the hydrogen fuel cell M are connected through leads respectively.

As shown in fig. 1, 2 and 3, after the 220V ac power enters

pins

1 and 2 of the regulated power supply a1, the regulated power supply a1 outputs a stable 12V dc power under the action of its internal circuit at

pins

3 and 4, and then enters the two ends of the power input of the short message module a4, the temperature detection circuit, the voltage detection circuit, the gas leakage circuit, the pressure detection circuit and the remote control circuit, so that the above circuits are in a power-on working state. After the temperature detection circuit works when power is supplied, the temperature probe W can monitor the shell temperature of the hydrogen fuel cell in real time, when the shell temperature is lower than 50 ℃, the resistance value of the thermistor RT is relatively large, the 12V power supply positive electrode enters the base electrode of the NPN triode Q to be lower than 0.7V after being subjected to voltage reduction and current limitation through the adjustable resistor RP1 and the thermistor RT, the NPN triode Q cut-off relay K1 loses power, and the short message module A4 cannot send a short message. When the temperature of the hydrogen fuel cell shell is higher than 50 ℃, the resistance value of the thermistor RT is relatively small, so that the base voltage of the positive electrode of a 12V power supply entering the NPN triode Q is higher than 0.7V after the positive electrode is subjected to voltage reduction and current limitation through the adjustable resistor RP1 and the thermistor RT, the conduction collector of the NPN triode Q outputs low level and enters the input end of the negative power supply of the relay K1, and then the relay K1 is electrified to attract the input end of the control power supply and the normally open contact end to be closed; because the 5 feet of the short message module A4 are connected with the normally open contact end of the relay K1, the 5 feet of the short message module A4 can be triggered at the moment, the short message module A4 can send out the short message of 'over-temperature' stored in the short message module A4, and therefore a remote manager mobile phone connected with the short message module A4 can know that the temperature of the hydrogen fuel cell is over-high on site in the first time after receiving the short message.

As shown in fig. 1, 2, and 3, in the voltage detection circuit, after the power output by the hydrogen fuel cell during operation enters one end of the adjustable resistor RP2 (electrolytic capacitor C filters), when the voltage output by the hydrogen fuel cell during normal operation is stable (for example, 72V), the power goes through the adjustable resistor RP2 to drop voltage and limit current, then enters the base of the NPN triode Q1 to be higher than 0.7V, the NPN triode Q1 turns on the collector to output a low level to enter the negative power input end of the relay K2, so that the relay K2 is powered on to pull in the power input end and the normally closed contact end to open the circuit, and then the short message module a4 does not send a short message. In the voltage detection circuit, when the voltage output by the hydrogen fuel cell in abnormal operation is unstable and too low (such as 60V), the voltage of a power supply is reduced by the adjustable resistor RP2, the current is limited, then the voltage enters the base electrode of the NPN triode Q1 and is lower than 0.7V, and the NPN triode Q1 cuts off the power loss of the relay K2 to control the input end of the power supply and the end of the normally closed contact to be closed; because the 4 feet of the short message module A4 are connected with the normally closed contact end of the relay K2, the 4 feet of the short message module A4 can be triggered at the moment, the short message module A4 can send out the short message of 'low voltage' stored in the short message module A4, and therefore, after a mobile phone of a remote manager connected with the short message module A4 receives the short message, the remote manager can know that the output voltage of the hydrogen fuel cell is too low due to the work abnormality of the hydrogen fuel cell on site in the first time. In the pressure detection circuit, in application, when the amount of hydrogen in the hydrogen pipe is sufficient, the internal contact of the pressure switch W is in a closed state, so that the positive electrode of the 12V power supply can be subjected to voltage reduction and current limitation through the pressure switch W and the resistor R2 and enters the base of the NPN triode Q2, so that the NPN triode Q2 conducts the collector to output a low level and enters the negative power input end of the relay K4, the relay K4 is electrified to attract the control power input end and the normally closed contact end to be open, and then the short message module a4 cannot send a short message. In the pressure detection circuit, when the input hydrogen stops or the hydrogen quantity is too small, the internal contact of the pressure switch W is opened, so that the base electrode of the NPN triode Q2 is in a cut-off state due to no proper high level, and further, the input end of the relay K4 power loss control power supply and the normally closed contact end are closed; because the pin 6 of the short message module A4 is connected with the normally closed contact end of the relay K4, the pin 4 of the short message module A4 is triggered at the moment, the short message module A4 sends out the short message of 'insufficient hydrogen amount' stored in the short message module A4, and thus, after a mobile phone of a remote manager connected with the short message module A4 receives the short message, the remote manager can know that the hydrogen amount of the hydrogen fuel cell in the field is too low due to abnormal work in the first time.

As shown in fig. 1, 2, and 3, in the gas leakage circuit, after the gas sensor T (with the function of reducing voltage and limiting current of the resistor R1) is powered on, when no hydrogen leakage occurs on site, the resistance between the first measurement electrode pin 3 and the second measurement electrode pin 4 of the gas sensor T is large, the potential of the pin 2 of the time-base integrated circuit A3 is lower than one third of the power supply voltage, under the combined action of the peripheral element adjustable resistor RP3 and the resistor R3, the pin 3 of the time-base integrated circuit A3 outputs a high level, the relay K3 maintains a power-off state, and the short message module a4 does not send a short message. When hydrogen leakage occurs on site and is detected by the gas sensor T, the resistance between the 3 feet of the first measuring electrode and the 4 feet of the second measuring electrode of the gas sensor T is reduced, so that the potential of the 2 feet of the time-base integrated circuit A3 is increased, when the potential of the 2 feet of the time-base integrated circuit A3 is more than one third of the power supply voltage, the 3 feet output of the time-base integrated circuit A3 is converted into low level, and then the relay K3 is electrified to attract the control power supply input end and the normally open contact end to be closed; because the pin 3 of the short message module A4 is connected with the normally open contact end of the relay K3, the pin 3 of the short message module A4 is triggered at the moment, the short message module A3 sends out the short message of 'gas leakage' stored in the short message module A3, and therefore, after a mobile phone of a remote management person connected with the short message module A4 receives the short message, the remote management person can know that hydrogen leakage occurs on site in the first time.

As shown in fig. 1, 2, and 3, when the temperature of the on-site hydrogen fuel cell is too high, the hydrogen stops inputting or the input amount is too low, the output voltage of the hydrogen fuel cell is too low due to a fault, and the hydrogen leaks, after a remote administrator receives a short message through a mobile phone, when the on-site hydrogen fuel cell needs to be shut down to prevent the fault from being expanded, the administrator sends a first wireless closing signal through a mobile phone APP, after receiving the first wireless closing signal, a pin 3 of a remote wireless controller a5 outputs a high level, the high level drops through a resistor R4 and enters a base of a triode Q3, an NPN triode Q3 conducts a collector to output a low level to enter a negative power input end of a relay K5, and then the relay K5 is powered to attract a control power input end and a normally open contact end of the relay K5 to be closed. Because the normally open contact end of the relay K4 is connected with the input end of the positive power supply of the electromagnetic gas valve DC, the electromagnetic gas valve DC can be used by an electrician to close the valve core of the electromagnetic gas valve DC at the moment, hydrogen does not enter the hydrogen fuel cell any more, and the hydrogen fuel cell stops, so that a manager can close the hydrogen fuel cell before arriving at the site, and the fault amplification is prevented. Through the aforesaid, in this novel application, temperature detect circuit can real-time detection hydrogen fuel cell's casing temperature, voltage detect circuit can real-time detection hydrogen fuel cell's output voltage, gas leakage circuit can real-time detection hydrogen fuel cell whether take place hydrogen leakage around, pressure detection circuit can real-time detection hydrogen's input pressure, it is unusual at hydrogen fuel cell operating temperature, output voltage crosses low and take place hydrogen leakage, when hydrogen stops gas, this novel ability very first time gives distal end managers suggestion through the SMS mode, distal end managers can also make hydrogen fuel cell stop pile through the long-range shutoff hydrogen valve of remote control circuit through the cell-phone of body as required, the fault amplification has been prevented. The novel hydrogen fuel cell brings convenience to managers and ensures the normal work of the hydrogen fuel cell. In the circuit, the thermistor RT is a negative temperature coefficient thermistor of a model NTC 103D; NPN triode Q, Q1, Q2, Q3 model 9013; the resistances of the resistors R1, R2, R3 and R4 are 47 omega, 1K, 130 omega and 1K respectively; the specifications of the adjustable resistors RP1, RP2 and RP3 are respectively 8M (adjusted to 2.2M), 8M (adjusted to 6.2M) and 2.2K (adjusted to 1K); the electrolytic capacitor model is 100 UF/25V; relays K1, K2, K3, K4, K5 are DC12V relays; the time base integrated circuit a3 model is NE 555. The air pressure switch S1 is a finished product of a QPM11-NC normally closed contact type air pressure switch (adjusted to 1.6 MPa); the gas sensor T model is MM-25.

The basic principles and essential features of the invention and the advantages of the invention have been shown and described above, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but rather can be embodied 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.

Furthermore, it should be understood that although the present description refers to embodiments, the embodiments do not include only one independent technical solution, and such description is only for clarity, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. The hydrogen fuel cell monitoring system comprises a voltage-stabilized power supply, an electromagnetic valve and a short message module; it is characterized by also comprising a temperature detection circuit, a voltage detection circuit, a gas leakage circuit, a pressure detection circuit and a remote control circuit; the temperature detection circuit comprises a thermistor and a trigger sub-circuit, and the thermistor is arranged on the hydrogen fuel cell; the pressure detection circuit comprises a pressure switch and a control sub-circuit, the electromagnetic valve is connected between a hydrogen gas supply pipe and a hydrogen gas input pipe of the hydrogen fuel cell in series, and the pressure switch is arranged at the side end of the hydrogen gas supply pipe; the voltage-stabilizing power supply, the short message module, the trigger sub-circuit of the temperature detection circuit, the voltage detection circuit, the gas leakage circuit, the control sub-circuit of the pressure detection circuit and the remote control circuit are arranged in the element box; the gas leakage circuit comprises a gas-sensitive sensing device, an adjustable resistor, a relay and a time-base integrated circuit, wherein the gas-sensitive sensing device is electrically connected with the adjustable resistor, the relay and the time-base integrated circuit; the power output end of the voltage-stabilized power supply is electrically connected with the two power input ends of the short message module, the temperature detection circuit, the voltage detection circuit, the gas leakage circuit, the pressure detection circuit and the remote control circuit respectively; the signal output ends of the temperature detection circuit, the voltage detection circuit, the gas leakage circuit and the pressure detection circuit are respectively and electrically connected with the multi-path signal input end of the short message module, the power output end of the remote control circuit is electrically connected with the power input end of the electromagnetic valve, and the signal input end of the voltage detection circuit is respectively and electrically connected with the two poles of the power supply of the hydrogen fuel cell.

2. The hydrogen fuel cell monitoring system of claim 1 wherein the regulated power supply is an ac to dc switching power supply module.

3. The hydrogen fuel cell monitoring system according to claim 1, wherein the electromagnetic valve is a normally open spool electromagnetic valve; the short message module is a short message alarm module.

4. The hydrogen fuel cell monitoring system according to claim 1, wherein the trigger sub-circuit of the temperature detection circuit includes an adjustable resistor, a relay, and an NPN transistor, the adjustable resistor, the relay, the NPN transistor, and the thermistor are electrically connected to each other, one end of the thermistor is connected to the positive power input terminal of the relay, the other end of the thermistor is connected to one end of the adjustable resistor, the other end of the adjustable resistor is connected to the base of the NPN transistor, the collector of the NPN transistor is connected to the negative power input terminal of the relay, and the emitter of the NPN transistor is connected to the control power input terminal of the relay.

5. The hydrogen fuel cell monitoring system according to claim 1, wherein the voltage detection circuit includes an electrolytic capacitor, an adjustable resistor, an NPN transistor, and a relay, the electrolytic capacitor, the adjustable resistor, the NPN transistor, and the relay are electrically connected to each other, a positive electrode of the electrolytic capacitor is connected to one end of the adjustable resistor, another end of the adjustable resistor is connected to a base of the NPN transistor, a collector of the NPN transistor is connected to a negative power input terminal of the relay, and a negative electrode of the electrolytic capacitor is connected to an emitter of the NPN transistor and a control power input terminal of the relay.

6. The hydrogen fuel cell monitoring system according to claim 1, wherein in the gas leakage circuit, a positive power supply input terminal of the gas sensor is connected to one end of the first resistor, the other end of the first resistor is connected to a first measuring terminal of the gas sensor, a second measuring terminal of the gas sensor is connected to one end of the second resistor, a trigger terminal of the time base integrated circuit, the other end of the second resistor is connected to one end of the adjustable resistor, a negative power supply input terminal of the gas sensor is connected to the other end of the adjustable resistor, a negative power supply input terminal of the time base integrated circuit, and a relay control power supply input terminal, a threshold terminal of the time base integrated circuit is connected to a reset terminal and a positive power supply input terminal, and a relay positive power supply input terminal, and an output terminal of the time base integrated circuit is connected to the relay negative power supply input terminal.

7. The hydrogen fuel cell monitoring system according to claim 1, wherein the control sub-circuit of the pressure detection circuit includes a resistor, an NPN transistor, and a relay, the resistor, the NPN transistor, the relay, and the pressure switch are electrically connected to each other, one end of the pressure switch is connected to one end of the resistor, the other end of the resistor is connected to a base of the NPN transistor, a collector of the NPN transistor is connected to the negative power input of the relay, and an emitter of the NPN transistor is connected to the control power input of the relay.

8. The hydrogen fuel cell monitoring system according to claim 1, wherein the remote control circuit includes a remote wireless controller and a resistor, an NPN transistor, and a relay, the remote wireless controller is electrically connected to the resistor, the NPN transistor, and the relay, a positive power input of the remote wireless controller is connected to a positive control power input and a positive power input of the relay, one of the outputs of the remote wireless controller is connected to one end of the resistor, the other end of the resistor is connected to a base of the NPN transistor, a collector of the NPN transistor is connected to a negative power input of the relay, and a negative power input of the remote wireless controller is connected to an emitter of the NPN transistor and a negative control power input of the relay.