CN207779987U - Lithium ion battery thermal runaway gas detection and automatic alarm - Google Patents
Lithium ion battery thermal runaway gas detection and automatic alarm Download PDFInfo
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- CN207779987U CN207779987U CN201721812426.2U CN201721812426U CN207779987U CN 207779987 U CN207779987 U CN 207779987U CN 201721812426 U CN201721812426 U CN 201721812426U CN 207779987 U CN207779987 U CN 207779987U
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 60
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title abstract description 18
- 238000004880 explosion Methods 0.000 claims description 14
- 239000013078 crystal Substances 0.000 claims description 12
- 102100032768 Complement receptor type 2 Human genes 0.000 claims description 9
- 101000941929 Homo sapiens Complement receptor type 2 Proteins 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 16
- 238000007600 charging Methods 0.000 abstract description 6
- 239000002360 explosive Substances 0.000 abstract description 4
- 238000012806 monitoring device Methods 0.000 abstract description 3
- LEYJJTBJCFGAQN-UHFFFAOYSA-N chembl1985378 Chemical compound OC1=CC=C2C=CC=CC2=C1N=NC(C=C1)=CC=C1N=NC1=CC=C(S(O)(=O)=O)C=C1 LEYJJTBJCFGAQN-UHFFFAOYSA-N 0.000 abstract 1
- 210000000056 organ Anatomy 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 146
- 238000005474 detonation Methods 0.000 description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 230000005236 sound signal Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241001062009 Indigofera Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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Abstract
The utility model discloses lithium ion battery group thermal runaway gas detection and automatic alarm relates to a thermal runaway alarm device to lithium ion battery group in warehouse storage, charging process, when out of control the battery thermal runaway, carry out real-time supervision and in time report to the police when releasing inflammable and explosive gas, by collection device, gas monitoring device, controlling means and alarm device constitute, wherein collection device comprises collection cover, spark arrester, air pump, the collection cover is installed above the positive pole of lithium ion battery group, the collection cover passes through the gas pipeline and links to each other with the air pump air inlet, the spark arrester is equipped with in the gas pipeline, gas monitoring device comprises gas collecting box, gas inductor, dupont's line, the air pump gas outlet links to each other with gas collecting box, the gas inductor is equipped with in the gas collecting box, controlling means comprises control box, singlechip, gas inductor interface and control electronic circuit, alarm device part comprises blue L ED alarm lamp, red L ED alarm lamp, bee calling organ.
Description
Technical field
The utility model Li-ion batteries piles thermal runaway detection of gas and autoalarm refer to it is a kind of for lithium from
Thermal runaway warning device of the sub- battery pack in warehouse storage, charging process, when to battery thermal runaway, inflammable and explosive gas of releasing out
Monitoring in real time and and alarm are carried out when body.
Background technology
As people are to efficiently, easily the demand of energy source is continuously increased, battery is increasingly widely applied to
It lives, produce movable every aspect.Especially lithium ion battery, it is this that there is high power capacity, operating voltage height, follow the bad service life
It is long, self discharge is low, can fast charging and discharging the advantages that battery be applied to most of field of people's daily life, such as hand already
The fields such as mechanical, electrical brain, electric vehicle, charger baby.
During making, storage, transport, high power charging-discharging, it is sightless broken that lithium ion battery is susceptible to some
Damage so that inside battery structure changes, and internal short-circuit, puncture, extruding etc. is caused to cause lithium ion battery that thermal runaway occurs, from
And cause safety accident.According to document, lithium ion battery burning is divided into two stages:It incipient detonation and fires, incipient detonation is between firing
There is the regular hour, when incipient detonation occurs for lithium ion battery, safety valve opens will release out high temperature and inflammable and explosive CO, H2Deng
Gas be easy to cause the safety accidents such as fire explosion poisoning.Therefore the gas discharged when incipient detonation occurs to lithium ion battery to carry out
Monitoring in real time and and alarm, can avoid causing safety accident because of battery thermal runaway.
Currently, the most temperature in use sensor of the Early-Warning System of lithium ion battery is predicted, and current
Early-Warning System is directed to single battery mostly, and this cannot integrally carry out prediction and warning to battery pack.Li-ion batteries piles
It can occur to burn when thermal runaway or explode, and release toxic and fuel gas, cause casualties and property loss.In battery
In the closed environments such as warehouse, if after thermal runaway occurs for a certain lithium ion battery, timely early warning and timely processing are carried out not
Casualties only can be effectively reduced, also can avoid remaining battery leads to the secondary safe thing caused by its thermal runaway because of high temperature
Therefore further decrease property loss.
Invention content
The utility model aim be against the above deficiency place provide a kind of Li-ion batteries piles thermal runaway detection of gas and
Autoalarm is the deficiency and Lessons of comprehensive various technologies, for Li-ion batteries piles in processes such as storage, chargings
In thermal runaway design corresponding prior-warning device, can be to lithium ion battery in the charge and discharge process of Li-ion batteries piles
It is monitored in real time in charge and discharge process, to provide a good security context for it.Prevent lithium ion battery from filling
Thermal runaway occurs in electric process, causes lithium ion battery that fire explosion occurs, causes casualties and property loss.Therefore, originally
Invention passes through the CO and H to being generated after lithium ion battery generation incipient detonation2Be monitored, to for lithium ion battery in charge and discharge
Higher safety is provided in journey.
Li-ion batteries piles thermal runaway detection of gas and autoalarm are that following technical scheme is taken to realize：
Li-ion batteries piles thermal runaway detection of gas and autoalarm are filled by collection device, gas controlling device, control
It sets and is formed with warning device；
Wherein collection device is made of collecting hood, spark arrester, air pump；Collecting hood is mounted on the anode of Li-ion batteries piles
Side, collecting hood are connected by gas pipeline with air pump air inlet, and spark arrester is housed in gas pipeline.The spark arrester is set respectively
The air inlet and outlet port in air pump are set, can be prevented during collecting gas, gas reaches concentration of gas explosion, encounters
Fire explosion occurs for Mars.
Gas controlling device is by gas collection case（Tank）, gas sensor, Du Pont line composition.Air pump gas outlet passes through gas
Pipeline and gas collection case（Tank）It is connected, gas collection case（Tank）It is interior that gas sensor is housed.Gas collection case（Tank）On be equipped with
Besel can monitor gas collection case by besel（Tank）Interior gas collection situation.
Control device is made of control cabinet, microcontroller, gas sensor, gas sensor interface and control electronic circuit；
Gas sensor monitor collect come gas componant or concentration signal pass through with gas sensor interface, by transmission line will believe
It number reaches and to execute determining program in microcontroller.
The gas sensor uses TGS822TF type gas sensors.The microcontroller uses AT89C52 type lists
Piece machine.
Equipped with control electronic circuit board in control cabinet, control on electronic circuit board equipped with electronic control component.
Warning device part is made of blue led alarm lamp, red LED alarm lamp, buzzer.
Control cabinet is provided with control panel, and power switch, gas sensor interface, microcontroller, indigo plant are housed on control panel
Color LED alarm lamp, red LED alarm lamp, buzzer.
Control electronic circuit by microcontroller U1, control system operating circuit, sensor detection circuit, LED display circuit, press
Key detection circuit, buzzer alarm circuit composition.
Control system operating circuit includes the 18th foot, the 19th foot and the 9th foot, crystal oscillator Y51, the capacitance C52. of microcontroller U1
C53. CD21, resistance R21. R22. R23, light-emitting diodes D21, button SReset.
Sensor detection circuit include microcontroller U1 the 1st foot and the 2nd foot, sensor UA2. UA3, resistance A52. A53,
Button S1. S2.
LED display circuit includes the 21st foot and the 25th foot, light emitting diode D1. D2 of microcontroller U1.
Key press detecting circuit includes the 35th foot and the 39th foot, resistance R50. R51 of microcontroller U1.
Buzzer alarm circuit includes the 10th foot, resistance R82, triode Q81, the buzzer Speaker of microcontroller U1.
In controlling electronic circuit, the 1st foot of microcontroller U1 is connected with two feet of resistance RA2, sensor UA2, resistance RA2
The other end connected with three feet of power supply, sensor UA2, a foot of sensor UA2 ground connection；The 2nd foot and resistance of microcontroller U1
The two feet connection of RA3, sensor UA3, the other end of resistance RA3 are connected with three feet of power supply, sensor UA3, sensor UA3's
One foot is grounded；The 19th foot of microcontroller U1 is connected with crystal oscillator Y51, capacitance C52, and the 18th foot and crystal oscillator Y51 of microcontroller U1 is another
End, capacitance C53 connections, the capacitance C52 other ends are connected with the capacitance C53 other ends；The 9th foot and button SReset of microcontroller U1 connects
It connects, the other end of button SReset is connected with resistance R23, and the other end and power supply, capacitance CD21, the resistance R21 of resistance R23 connect
It connects, the other end of capacitance CD21 is connected with resistance R22, and the other end of resistance R21 is connected with light emitting diode D21, light-emitting diodes
The other end of pipe D21 and resistance R22 are grounded；The 39th foot of microcontroller U1 is connected with button S1, the other end and resistance of button S1
35th foot of R52 connections, microcontroller U1 is connected with button S2, and the other end of button S1 is connected with resistance R53, resistance R52 and electricity
Hinder another termination power of R53；The 21st foot of microcontroller U1 is connected with light emitting diode D1, the other end of light emitting diode D1 and
Resistance R50 connections, the 25th foot of microcontroller U1 are connected with light emitting diode D2, and the other end of button S1 is connected with resistance R51, electricity
Hinder another termination power of R50 and resistance R51；The 10th foot of microcontroller U1 is connected with resistance R82, the other end of resistance R82 and
The base stage of triode Q81 connects, and the emitter of triode Q81 connects power supply, and the collector of triode Q81 meets buzzer Speaker
A foot, buzzer Speaker two feet ground connection.
Collecting hood is mounted on the surface 20cm-30cm of Li-ion batteries piles, collects and comes from 18650 type lithium of monitored target
The gas that ion battery goes out through discharge of safety valve, the gas being collected is through pipeline, by spark arrester by air pump again through back-fire relief
Device is transferred at gas sensor；By gas sensor receive from be collected Lai gas componant or concentration signal, through with gas
Body inductor pin interface connects, and via line, which reaches signal, executes determining program in microcontroller, microcontroller via line respectively with
Blue led alarm lamp, red LED alarm lamp connect, buzzer while also via line and the microcontroller for executing temperature determining program
It is connected.Gas sensor is connected by interface via line with microcontroller, and capacitance connects through crystal oscillator with microcontroller.
The gas concentration measurement range that the external gas sensor of gas sensor pin interface provides within the scope of room temperature
For 100ppm-1000ppm.The designated gas ingredient that gas sensor is monitored is CO and H2.Gas sensor face air pump is defeated
The collecting hood of outlet, distance are 10cm-15cm.
The monitoring method of Li-ion batteries piles thermal runaway detection of gas and autoalarm is as follows：
Collecting hood places the surface 20cm-30cm of Li-ion batteries piles, is collected by collecting hood and comes from monitored target lithium
The gas that ion battery loss goes out passes sequentially through pipeline, spark arrester, air pump, gas collection case via air pump pumping（Tank）, finally
It reaches immediately ahead of gas sensor；CO and H are detected by the external gas sensor of gas sensor pin interface2Gas componant and
Signal via line is transmitted to microcontroller and judges to run into line program, if gas componant does not contain CO and H by concentration2Gas componant or
CO and H2Gas composition concentration is less than 120ppm, then does not send alarm command；If gas componant contains CO and H2Gas componant and CO
And H2When gas composition concentration is greater than or equal to 120ppm, then instruction can be sent out, red LED alarm lamp lights, and buzzer is sent out
Alarm sound signal.
When the gas signal of gas sensor feedback contains specified CO and H2Gas componant and CO and H2Gas composition concentration is big
When 120ppm, monitored battery reaches early-warning conditions, and prior-warning device part red LED alarm lamp lights, buzzer
Alarm sound signal is sent out, Li-ion batteries piles have occurred that incipient detonation to prompting personnel at this time, it is necessary to it adopts an effective measure immediately,
Otherwise generation of the thermal runaway so as to cause fire explosion will further occur for battery；When gas sensor feedback signal without CO and
H2Gas componant or CO and H2When gas composition concentration is less than 120ppm, determining program can stop sending out warning device part
Alarm command, at this time warning device be stopped or do not work, so that determining program in microcontroller is carried out gas signal
A new round judges.
The advantageous effect of the utility model Li-ion batteries piles thermal runaway detection of gas and autoalarm：
The present invention has prison in real time as thermal runaway warning device of the Li-ion batteries piles in charge and discharge process is directed to
It surveys, device is simple, simple operation and other advantages.It, can be to lithium present invention is mainly used in the charge and discharge process of Li-ion batteries piles
Ion battery group is monitored in real time in charge and discharge process, to provide a good security context for it.Prevent lithium from
Thermal runaway occurs in charging process for sub- battery pack, causes Li-ion batteries piles that fire explosion occurs, causes casualties and wealth
Production loss.Therefore, the present invention passes through the CO and H to being generated after Li-ion batteries piles generation incipient detonation2Be monitored, to for lithium from
Sub- battery pack provides higher safety in charge and discharge process.
Description of the drawings：
The utility model is further described below with reference to attached drawing：
Fig. 1 is Li-ion batteries piles thermal runaway detection of gas and autoalarm structural schematic diagram；
Fig. 2 is the control electronic circuit schematic diagram of Li-ion batteries piles thermal runaway detection of gas and autoalarm.
In figure：1, Li-ion batteries piles, 2, collecting hood, 3, spark arrester, 4, air pump, 5, gas collection case, 6, gas sensing
Device, 7, gas sensor interface, 8, microcontroller, 9, blue alarm lamp, 10, red alarm lamp, 11, buzzer, 12, power supply opens
It closes.
Specific implementation mode
With reference to attached drawing 1,2, Li-ion batteries piles thermal runaway detection of gas and autoalarm are by collection device, gas-monitoring
Device, control device and warning device composition；
Wherein collection device is by collecting hood（2）, spark arrester（3）, air pump（4）Composition；Collecting hood（2）Mounted on lithium-ion electric
Pond group（1）Anode top, collecting hood（2）Pass through gas pipeline and air pump（4）Air inlet is connected, and back-fire relief is housed in gas pipeline
Device（3）.The spark arrester is separately positioned on the air inlet and outlet port of air pump.It can prevent during collecting gas,
Gas reaches concentration of gas explosion, encounters Mars and fire explosion occurs.
Gas controlling device is by gas collection case（Tank）（5）, gas sensor（6）, Du Pont line composition.Air pump（4）Outlet
Mouth passes through gas pipeline and gas collection case（Tank）It is connected, gas collection case（Tank）It is interior that gas sensor is housed.Gas collection case
（Tank）It is upper that besel is housed, it can monitor gas collection case by besel（Tank）Interior gas collection situation.
Control device is by control cabinet, microcontroller（8）, gas sensor（6）, gas sensor interface（7）With control electronics
Circuit forms；Gas sensor monitors that collecting the gas componant come or concentration signal passes through and gas sensor interface（7）, pass through
Signal is reached microcontroller by transmission line（8）Middle execution determining program.
The gas sensor（6）Using TGS822TF type gas sensors.The microcontroller（8）Using
AT89C52 type microcontrollers.
Equipped with control electronic circuit board in control cabinet, control on electronic circuit board equipped with electronic control component.
Warning device part is by blue led alarm lamp（10）, red LED alarm lamp（11）, buzzer（12）Composition.
Control cabinet is provided with control panel, and power switch is housed on control panel（13）, gas sensor interface（7）, it is single
Piece machine（8）, blue led alarm lamp（10）, red LED alarm lamp（11）, buzzer（12）.
Control electronic circuit by microcontroller U1, control system operating circuit, sensor detection circuit, LED display circuit, press
Key detection circuit, buzzer alarm circuit composition.
Control system operating circuit includes the 18th foot, the 19th foot and the 9th foot, crystal oscillator Y51, the capacitance C52. of microcontroller U1
C53. CD21, resistance R21. R22. R23, light-emitting diodes D21, button SReset.
Sensor detection circuit include microcontroller U1 the 1st foot and the 2nd foot, sensor UA2. UA3, resistance A52. A53,
Button S1. S2.
LED display circuit includes the 21st foot and the 25th foot, light emitting diode D1. D2 of microcontroller U1.
Key press detecting circuit includes the 35th foot and the 39th foot, resistance R50. R51 of microcontroller U1.
Buzzer alarm circuit includes the 10th foot, resistance R82, triode Q81, the buzzer Speaker of microcontroller U1.
In controlling electronic circuit, the 1st foot of microcontroller U1 is connected with two feet of resistance RA2, sensor UA2, resistance RA2
The other end connected with three feet of power supply, sensor UA2, a foot of sensor UA2 ground connection；The 2nd foot and resistance of microcontroller U1
The two feet connection of RA3, sensor UA3, the other end of resistance RA3 are connected with three feet of power supply, sensor UA3, sensor UA3's
One foot is grounded；The 19th foot of microcontroller U1 is connected with crystal oscillator Y51, capacitance C52, and the 18th foot and crystal oscillator Y51 of microcontroller U1 is another
End, capacitance C53 connections, the capacitance C52 other ends are connected with the capacitance C53 other ends；The 9th foot and button SReset of microcontroller U1 connects
It connects, the other end of button SReset is connected with resistance R23, and the other end and power supply, capacitance CD21, the resistance R21 of resistance R23 connect
It connects, the other end of capacitance CD21 is connected with resistance R22, and the other end of resistance R21 is connected with light emitting diode D21, light-emitting diodes
The other end of pipe D21 and resistance R22 are grounded；The 39th foot of microcontroller U1 is connected with button S1, the other end and resistance of button S1
35th foot of R52 connections, microcontroller U1 is connected with button S2, and the other end of button S1 is connected with resistance R53, resistance R52 and electricity
Hinder another termination power of R53；The 21st foot of microcontroller U1 is connected with light emitting diode D1, the other end of light emitting diode D1 and
Resistance R50 connections, the 25th foot of microcontroller U1 are connected with light emitting diode D2, and the other end of button S1 is connected with resistance R51, electricity
Hinder another termination power of R50 and resistance R51；The 10th foot of microcontroller U1 is connected with resistance R82, the other end of resistance R82 and
The base stage of triode Q81 connects, and the emitter of triode Q81 connects power supply, and the collector of triode Q81 meets buzzer Speaker
A foot, buzzer Speaker two feet ground connection.
Collecting hood（2）Mounted on the surface 20cm-30cm of Li-ion batteries piles, collects and come from monitored target 18650
Type Li-ion batteries piles（1）The gas gone out through discharge of safety valve, the gas being collected pass through spark arrester through pipeline（3）By
Air pump（4）Again TGS822TF type gas sensors are transferred to through spark arrester（6）Place；By TGS822TF type gas sensors（6）It connects
Receive from be collected come gas componant or concentration signal, through with TGS822TF type gas sensor pin interfaces（7）Connect, passes through
Signal is reached AT89C52 type microcontrollers by circuit（8）Middle execution determining program, AT89C521 type microcontrollers（8）Via line is distinguished
With blue led alarm lamp（10）, red LED alarm lamp（11）Connect, buzzer（12）Also via line is sentenced with temperature is executed simultaneously
The TA89C52 type microcontrollers of disconnected program（8）It is connected.TGS822TF type gas sensors pass through interface（7）Via line and AT89C52
Type microcontroller（8）Connect, capacitance（14）Through crystal oscillator（13）With AT89C52 type microcontrollers（8）Connect.
The external TGS822TF type gas sensors of TGS822TF type gas sensor pin interfaces carry within the scope of room temperature
The gas concentration measurement of confession ranging from 100ppm-1000ppm.The designated gas ingredient that TGS822TF type gas sensors are monitored
For CO and H2.The collecting hood of TGS822TF type gas sensor face air pump output ends（14）, distance is 10cm-15cm.
The monitoring method of Li-ion batteries piles thermal runaway autoalarm based on gas-monitoring is as follows：
Collecting hood（2）The surface 20cm-30cm for placing Li-ion batteries piles, by collecting hood（2）It collects from monitored
18650 type Li-ion batteries piles of object（1）The gas that loss goes out, via air pump（4）Pumping passes sequentially through pipeline, spark arrester（3）、
Air pump（4）, gas collection case（Tank）, finally reach TGS822TF type gas sensors（5）Front；By TGS822TF type gases
Inductor pin interface（6）External TGS822TF types gas sensor（6）Detect CO and H2Gas componant and concentration, by signal
Via line is transmitted to AT89C52 type microcontrollers（8）Judge to run into line program, if gas componant does not contain CO and H2Gas componant or
CO and H2Gas composition concentration is less than 120ppm, then does not send alarm command；If gas componant contains CO and H2Gas componant and CO
And H2When gas composition concentration is greater than or equal to 120ppm, then instruction, red LED alarm lamp can be sent out（11）It lights, buzzer
（12）Send out alarm sound signal.
When the gas signal of TGS822TF type gas sensors feedback contains specified CO and H2Gas componant and CO and H2Gas
When constituent concentration is greater than or equal to 120ppm, monitored battery pack reaches early-warning conditions, prior-warning device part red LED alarm lamp
It lights, buzzer sends out alarm sound signal, and battery has occurred that incipient detonation to prompting personnel at this time, it is necessary to take effectively arrange immediately
It applies, otherwise generation of the thermal runaway so as to cause fire explosion will further occur for Li-ion batteries piles；When TGS822TF type gases
Inductor feedback signal is free of CO and H2Gas componant or CO and H2When gas composition concentration is less than 120ppm, determining program can stop
The alarm command that only warning device part is sent out, at this time warning device be stopped or do not work, then make AT89C52 monolithics
Determining program in machine carries out new round judgement to gas signal.
Embodiment：
In use, by collecting hood（2）It is placed on 18650 type Li-ion batteries piles（1）Anode top, distance anode 10cm~
15cm.It is now assumed that certain 18650 type Li-ion batteries piles in the capture range of gas collector, carries out exoelectrical reaction, when it
It is abnormal, method for early warning includes the following steps：
1）The 18650 type Li-ion batteries piles in charging process（1）Temperature increases, and internal pressure increases, and leads to its anode
Safety valve open, leak out gas.In the process, air pump（4）Pass through collecting hood with the pressure of 1.5Mpa（2）Collect lithium from
Gas above sub- battery pack, gas is drawn onto in air pump, since leaked gas has combustibility, and the explosion limit of gas
It is relatively low.Therefore, the increase spark arrester before and after air pump（3）, prevent gas from reaching combustible concentration and cause fire explosion with incendiary source；
2）Gas is transmitted to gas sensor by the gas of collection by pipeline, air pump（6）On, pass through gas sensing
Device（6）Gas is monitored in real time, gas sensor is according to its monitoring principle to CO and H2It is monitored, and by the letter of monitoring
Number pass to microcontroller；
3）Microcontroller（8）Signal is compared by the program set in internal wiring and microcontroller, then passes through monolithic
Machine sends instructions to warning device；
4）Gas sensor once monitors CO or H2, warning device is just sent instructions to immediately, and red LED is made to alarm
Lamp（11）Flicker, while buzzer（12）Work, sends out lasting sound, and blue led alarm lamp does not work or stops, and reminds
Battery has occurred that incipient detonation to personnel at this time, it is necessary to adopt an effective measure immediately, otherwise battery will further occur thermal runaway from
And lead to the generation of fire explosion；
In embodiments of the present invention, gas monitor selects TGS822TF types, has to carbon monoxide and hydrogen highly sensitive
Degree；Microcontroller uses AT98C52 type microcontrollers, and the programming language used is C language, and program code is simply write well；Air pump is adopted
With SK water-ring vacuum pumps, it is primarily adapted for use in the occasion of flammable explosive gas, spark arrester uses bite type gas spark arrester,
Service life is long, and installation is simple and convenient；Blue led alarm lamp, red LED alarm lamp and buzzer can be purchased on the market
It arrives.
Claims (8)
1. a kind of Li-ion batteries piles thermal runaway detection of gas and autoalarm, it is characterised in that：It is supervised by collection device, gas
Survey device, control device and warning device composition；
Wherein collection device is made of collecting hood, spark arrester, air pump；Collecting hood is mounted on the anode top of Li-ion batteries piles,
Collecting hood is connected by gas pipeline with air pump air inlet, and spark arrester is housed in gas pipeline；
Gas controlling device is made of gas collection case, gas sensor, Du Pont's line；Air pump gas outlet passes through gas pipeline and gas
Body collecting box is connected, and gas sensor is housed in gas collection case；
Control device is made of control cabinet, microcontroller, gas sensor, gas sensor interface and control electronic circuit；Gas
Inductor monitor collect come gas componant or concentration signal pass through with gas sensor interface, signal is passed by transmission line
To executing determining program in microcontroller；
Equipped with control electronic circuit board in control cabinet, control on electronic circuit board equipped with electronic control component；
Warning device part is made of blue led alarm lamp, red LED alarm lamp, buzzer.
2. Li-ion batteries piles thermal runaway detection of gas according to claim 1 and autoalarm, it is characterised in that：Control
Case processed is provided with control panel, alarms equipped with power switch, gas sensor interface, microcontroller, blue led on control panel
Lamp, red LED alarm lamp and buzzer.
3. Li-ion batteries piles thermal runaway detection of gas according to claim 1 and autoalarm, it is characterised in that：Institute
The spark arrester stated is separately positioned on the air inlet and outlet port of air pump, can prevent during collecting gas, gas reaches
Concentration of gas explosion encounters Mars and fire explosion occurs.
4. Li-ion batteries piles thermal runaway detection of gas according to claim 1 and autoalarm, it is characterised in that：Institute
Besel is housed on the gas collection case stated, can monitor gas collection situation in gas collection case by besel.
5. Li-ion batteries piles thermal runaway detection of gas according to claim 1 and autoalarm, it is characterised in that：
Electronic circuit is controlled to be examined by microcontroller U1, control system operating circuit, sensor detection circuit, LED display circuit, button
Slowdown monitoring circuit, buzzer alarm circuit composition；
Control system operating circuit include the 18th foot, the 19th foot and the 9th foot of microcontroller U1, crystal oscillator Y51, capacitance C52, C53,
CD21, resistance R21, R22, R23, light-emitting diodes D21, button SReset；
Sensor detection circuit includes the 1st foot and the 2nd foot, sensor UA2, UA3, resistance A52, A53, button of microcontroller U1
S1、S2；
LED display circuit includes the 21st foot and the 25th foot, light emitting diode D1, D2 of microcontroller U1；
Key press detecting circuit includes the 35th foot and the 39th foot, resistance R50, R51 of microcontroller U1；
Buzzer alarm circuit includes the 10th foot, resistance R82, triode Q81, the buzzer Speaker of microcontroller U1；
Microcontroller uses AT89C52 type microcontrollers, sensor to use TGS822TF type gas sensors.
6. Li-ion batteries piles thermal runaway detection of gas according to claim 1 and autoalarm, it is characterised in that：
In controlling electronic circuit, the 1st foot of microcontroller U1 is connected with two feet of resistance RA2, sensor UA2, and resistance RA2's is another
One end is connected with three feet of power supply, sensor UA2, the foot ground connection of sensor UA2；The 2nd foot and resistance RA3 of microcontroller U1,
Two feet of sensor UA3 connect, and the other end of resistance RA3 is connected with three feet of power supply, sensor UA3, a foot of sensor UA3
Ground connection；The 19th foot of microcontroller U1 is connected with crystal oscillator Y51, capacitance C52, the 18th foot and the crystal oscillator Y51 other ends, electricity of microcontroller U1
Hold C53 connections, the capacitance C52 other ends are connected with the capacitance C53 other ends；The 9th foot of microcontroller U1 is connected with button SReset, is pressed
The other end of key SReset is connected with resistance R23, and the other end of resistance R23 is connected with power supply, capacitance CD21, resistance R21, capacitance
The other end of CD21 is connected with resistance R22, and the other end of resistance R21 is connected with light emitting diode D21, light emitting diode D21 and
The other end of resistance R22 is grounded；The 39th foot of microcontroller U1 is connected with button S1, and the other end of button S1 is connected with resistance R52,
The 35th foot of microcontroller U1 is connected with button S2, and the other end of button S1 is connected with resistance R53, and resistance R52 and resistance R53's is another
One termination power；The 21st foot of microcontroller U1 is connected with light emitting diode D1, and the other end and resistance R50 of light emitting diode D1 connect
It connects, the 25th foot of microcontroller U1 is connected with light emitting diode D2, and the other end of button S1 is connected with resistance R51, resistance R50 and electricity
Hinder another termination power of R51；The 10th foot of microcontroller U1 is connected with resistance R82, the other end and triode Q81 of resistance R82
Base stage connection, the emitter of triode Q81 connects power supply, and the collector of triode Q81 connects a foot of buzzer Speaker, bee
The two feet ground connection of ring device Speaker；
Microcontroller uses AT89C52 type microcontrollers, sensor to use TGS822TF type gas sensors.
7. Li-ion batteries piles thermal runaway detection of gas according to claim 1 and autoalarm, it is characterised in that：
Collecting hood is mounted on the surface 20cm-30cm of Li-ion batteries piles, collects and comes from monitored target Li-ion batteries piles
The gas gone out through discharge of safety valve, the gas being collected are received through spark arrester, gas through pipeline, by spark arrester by air pump again
Header is transferred at gas sensor；By gas sensor receive from be collected Lai gas componant or concentration signal, through with
Gas sensor pin interface connects, and via line, which reaches signal, executes determining program in microcontroller, microcontroller via line difference
Connect with blue led alarm lamp, red LED alarm lamp, buzzer while also via line and the monolithic for executing temperature determining program
Machine is connected, and gas sensor is connected by interface via line with microcontroller, and capacitance connects through crystal oscillator with microcontroller.
8. Li-ion batteries piles thermal runaway detection of gas according to claim 1 and autoalarm, it is characterised in that：
The gas concentration measurement that the external gas sensor of gas sensor pin interface provides within the scope of room temperature is ranging from
100ppm-1000ppm；The designated gas ingredient that gas sensor is monitored is CO and H2；Gas sensor face air pump exports
The collecting hood at end, distance are 10cm-15cm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008083A (en) * | 2017-12-22 | 2018-05-08 | 南京工业大学 | Lithium ion battery pack thermal runaway automatic alarm based on gas monitoring and monitoring method thereof |
| CN109513137A (en) * | 2018-12-13 | 2019-03-26 | 南京工业大学 | Lithium ion battery safety storage box with automatic collection device for combustion and explosion products |
| CN112909360A (en) * | 2021-01-28 | 2021-06-04 | 国网江苏省电力有限公司经济技术研究院 | Polling extraction type container energy storage thermal runaway detection method and fire fighting device |
| FR3104821A1 (en) | 2019-12-13 | 2021-06-18 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Electric battery with limited risk of thermal runaway propagation |
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2017
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008083A (en) * | 2017-12-22 | 2018-05-08 | 南京工业大学 | Lithium ion battery pack thermal runaway automatic alarm based on gas monitoring and monitoring method thereof |
| CN109513137A (en) * | 2018-12-13 | 2019-03-26 | 南京工业大学 | Lithium ion battery safety storage box with automatic collection device for combustion and explosion products |
| FR3104821A1 (en) | 2019-12-13 | 2021-06-18 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Electric battery with limited risk of thermal runaway propagation |
| CN112909360A (en) * | 2021-01-28 | 2021-06-04 | 国网江苏省电力有限公司经济技术研究院 | Polling extraction type container energy storage thermal runaway detection method and fire fighting device |
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