CN110376247A - A kind of lithium ion battery combustion experiment platform - Google Patents
A kind of lithium ion battery combustion experiment platform Download PDFInfo
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- CN110376247A CN110376247A CN201910750189.9A CN201910750189A CN110376247A CN 110376247 A CN110376247 A CN 110376247A CN 201910750189 A CN201910750189 A CN 201910750189A CN 110376247 A CN110376247 A CN 110376247A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 63
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 45
- 238000002474 experimental method Methods 0.000 title claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 68
- 238000005070 sampling Methods 0.000 claims abstract description 53
- 230000006641 stabilisation Effects 0.000 claims abstract description 34
- 238000011105 stabilization Methods 0.000 claims abstract description 34
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000004880 explosion Methods 0.000 claims abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 5
- 239000010935 stainless steel Substances 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 241000883990 Flabellum Species 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 230000036284 oxygen consumption Effects 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 claims description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 230000007717 exclusion Effects 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 230000005619 thermoelectricity Effects 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 239000003517 fume Substances 0.000 abstract 1
- 230000001988 toxicity Effects 0.000 abstract 1
- 231100000419 toxicity Toxicity 0.000 abstract 1
- 238000013461 design Methods 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004786 cone calorimetry Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000010902 straw Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000002001 electrolyte material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000000781 heat-release-rate curve Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
- G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
- G01N25/30—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements
- G01N25/32—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements using thermoelectric elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
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- Food Science & Technology (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of lithium ion battery combustion experiment platform, includes between burning, current stabilization segment pipe, sampling segment pipe, thieff hatch, gas analyzer, blower, observation window, door, connects segment pipe and supporting element.Between building combustion experiment using firm stainless steel, even if can still guarantee safety under battery explosion situation；In burning, bottom setting air inlet guarantees oxygen supply, while top is discharged fume using blower, and the spilling for avoiding flue gas causes to pollute laboratory or measurement inaccuracy；The current stabilization segment pipe that the present invention is arranged, it is ensured that being sufficiently mixed for combustion product gases ensure that measuring accuracy；The present invention can be measured with considerable accuracy the lithium ion battery combustion heat using high-precision gas analyzer, analyze lithium ion battery danger of combustion；Secondly, gas analyzer can measure lithium ion battery combustion product gases, gaseous product and toxicity are analyzed.
Description
Technical field
The present invention relates to the technical fields of lithium ion battery combustion characteristics research, and in particular to be that a kind of can guarantee experiment
Personnel safety, the lithium ion battery combustion experiment platform that can measure cells burst heat and gaseous product, by between firm burning, it is steady
Lithium ion can conveniently, safely be carried out by flowing segment pipe, sampling segment pipe, blower and gas analyzer composition, the experimental bench
Cells burst experiment, and cells burst heat and gaseous product can be measured.
Background technique
In recent years, lithium ion battery becomes most commonly seen secondary cell in daily life, is widely used in mobile phone, just
It is visible almost everywhere to take formula computer, aerospace and electric car field, lithium ion battery.However lithium ion battery is due to it
High-energy density and inflammable and explosive material composition, still remain certain safety problem, are mainly manifested in battery and live through
There are the danger of fire or thermal runaway when filling over-discharge, mechanical shock and overheating.It is often sent out during lithium ion battery thermal runaway
Raw positive electrode decomposes the exothermic reaction between oxygen release, electrolyte and electrode material, these side reactions frequently result in heat and gas
Release eventually leads to thermal runaway and causes extremely serious fire threat, such as burning and explosion.Therefore lithium ion battery is studied
Combustion characteristics carries out qualitative and quantitative analysis to the thermal safety of battery and is of great significance.
The experimental facilities for being commonly used for lithium ion battery combustion experiment at present has cone calorimetry and the burning of ISO9705 large size
Heat release rate measures room.For lithium ion battery burning heat release rate measurement, both experimental facilities there is
Defect: cone calorimetry is mainly used in the standard combustion experiment of standard square sample, and experiment restrictive condition is harsher, battery combustion
Burning process is different from the burning of common timber, PMMA and PS, does not also have the shape of standard；In addition, lithium ion battery burns
Quick release goes out a large amount of flue gas in the process, and flue gas is often spouting, has high speed, and the collection cigarette of cone calorimetry
Cover size is smaller, is not enough to quickly collect whole flue gases, and the disperse and loss of flue gas inevitably result in final total combustion heat and survey
It is less than normal to measure result, and is easy that experimenter is caused to poison.ISO9705 large size burning heat release rate measurement room is then directed to
In the design of large-scale Room in Fire, measured power range is big, and standard room is and general having a size of 3.6m × 2.4m × 2.4m
Major comonomer battery size only 10cm × 10cm × 10cm measures room much smaller than ISO9705 large size burning heat release rate
Scale, using standard room test lithium ion battery combustion characteristics, like " quality for claiming a rice with a steelyard ".
There is the research of lithium ion battery combustion characteristics certain lack in above two common combustion testing standard device or instrument
It falls into.For battery flue gas it occur frequently that overflowing and measuring device precision the problems such as being unsatisfactory for lithium ion battery combustion power, and
Lithium ion battery thermal runaway has a certain risk, Chang Fasheng explosion danger, need to design a kind of certifiable experimenter safety,
The lithium ion battery combustion experiment of lithium ion battery combustion product gases, precise measurement cells burst heat and gaseous product can be collected completely
Platform.
Summary of the invention
The purpose of the present invention is to solve lithium ion battery flue gases in cells burst experiment easily to overflow, battery thermal runaway pair
The problems such as experimenter easily causes dangerous and currently used calorimeter assembly to be not suitable for lithium ion battery combustion testing, this hair
It is bright to provide a kind of be based on based on 1, current stabilization segment pipe 2, sampling segment pipe 3, thieff hatch 4, gas analyzer 5 and wind between burning
The lithium ion battery combustion experiment platform of machine 6.Battery is placed in 1 between burning, completely collection combustion product gases, it can by observation window 7
Easily to observe between burning cells burst phenomenon in 1, the gas of collection is sampled to gas analyzer 5, can accurately measure
Cells burst heat, to analyze lithium ion battery combustion characteristics.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows: a kind of certifiable experimenter safety, can essence
The really lithium ion battery combustion experiment platform of the measurement combustion heat and gaseous product, comprising:
1 between one burning, for placing battery and heating device etc., battery 1 between burning in burn；Two sections of steady flow segments
Pipeline 2 is located at sampling 3 rear and front end of segment pipe, for guaranteeing the stabilization of sampling segment pipe interior air-flow；One section of sampling segment pipe 3,
Four and the above thieff hatch 4 are at least arranged above, for installing flue gas in thermocouple and acquisition pipeline；One smoke exhaust fan 6 is used
Flue gas in 1 between discharge burning；One gas analyzer 5 connects sampling conduit, for analyzing the gas of cells burst flue gas
Product measures cells burst heat release rate HRR.1 arrangement observation window 7 and door 8 between burning, observation window 7 is for observing internal electricity
Pond combustion phenomena, door 8 then facilitate experimenter to enter between burning；In addition, 10 supporting pipeline of supporting element should be arranged, safety is ensured.
Wherein, 1 size should be designed according to lab space size between burning, it is proposed that having a size of 1.8m × 1.8m ×
1.8m.1 is proposed with console mode between burning, it is proposed that is designed using steel structure frame formula, steel plate thickness should be not less than 5mm, guarantee
Robustness.The observation window 7 arranged on 1 between burning, it is proposed that having a size of 40cm × 40cm, design principle be 1 between observation burning inside
Without dead angle.The door 8 being arranged on 1 between burning, it is proposed that having a size of 60cm × 160cm, design principle is personnel's easy access.
Wherein, current stabilization segment pipe 2 should be connected 1 gas outlet between burning, and flabellum shape knot can be used inside current stabilization segment pipe 2
Structure, promotes the turbulent mixture of gas, and structure chart and photo are shown in Fig. 5.Current stabilization segment pipe 2 should be arranged two sections, be located at sampling section
3 rear and front end of pipeline, rear end current stabilization segment pipe 2 are connected with blower 6, exclude interference of the blower to fluid in sampling segment pipe 3.Surely
The connection segment pipe 9 that same diameter can be used in extra pipeline between stream segment pipe 2 and sampling segment pipe 3 connects.
Wherein, the setting position for sampling segment pipe 3 should follow following principle: sampling segment pipe 31 goes out between preceding end burning
Bend pipe extension tube road length can be used if linear distance does not reach requirement in the pipe diameter that the duct length of port should be not less than 8 times
Degree reaches requirement；The pipe diameter that distance of the segment pipe 3 apart from rear end blower 6 should be not less than 4 times is sampled, if linear distance is not up to
To requirement, bend pipe extension duct length can be used and reach requirement.
Wherein, sampling segment pipe 3 should ensure that smooth enough, and should arrange four or more thieff hatch 4, for installing skin
Trustship, thermocouple and connection gas analyzer 5.It can increase by 1~2 redundancy sampling hole 4, to increase other gas tests for the later period
Instrument or probe are prepared.
Wherein, it is proposed with centrifugal blower for the blower of smoke evacuation, fan delivery should be according to gas in pipelines flow velocity and pipe
The size of road internal diameter selects.Gas in pipelines flow velocity recommended value is 5~10m/s；Internal diameter of the pipeline should be according to flame power to be measured
It determines, the recommended formula between internal diameter of the pipeline d (m) and flame power Q (kW) is formula (1):
Wherein, since cells burst experimental bench is to pass through oxygen in pipeline when measurement cells burst based on oxygen consumption principle
Decreasing value of the concentration relative to atmospheric oxygen concentration, to calculate cells burst heat release rate, therefore the gas analysis configured
Instrument 5 should at least be capable of measuring CO, CO2And O2Three kinds of gases, buying gas analyzer common in the market can meet the requirements.
Wherein, it supports the supporting element 10 of combustion experiment platform pipeline to use ceiling mounting type or console mode, furred ceiling can be used
Formula, to save ground space, design principle is that can not be deformed with supporting pipeline, guarantees safety.
Advantages of the present invention: it between 1. present invention use steel-frame structure production burning, and is sealed using steel plate after 5mm
It closes, ensure that the firmness degree between burning, even if battery thermal runaway is exploded, also can protect the safety of personnel；2. the present invention exists
Air inlet is arranged in bottom between burning, remaining position seals is good, while guaranteeing burning gas supply, also ensures air-tightness, has
It is collected conducive to the whole of combustion product gases, ensure that the test accuracy of the combustion heat；3. the present invention is in sampling segment pipe rear and front end
Current stabilization segment pipe is set, ensure that before sampling, gas has been sufficiently mixed uniformly, it is ensured that the accuracy of test；4. hair
It is bright to be provided with redundancy sampling hole on sampling segment pipe, in addition to connecting gas analyzer, the spy of other make-up gas can also be connected
Survey device or probe；5. the present invention is designed according to the general combustion power of battery, and gas collection is high-efficient, compensates for cone
Shape calorimeter, which collects gas, spilling and the excessive deficiency for not being suitable for cells burst test of ISO9705 large size combustion chamber range.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 three-view diagram between burning of the invention；
Fig. 3 floor design figure between burning of the invention；
Fig. 4 tri-dimensional picture between burning of the invention, wherein Fig. 4 (a) is three-dimensional general view between burning, and Fig. 4 (b) is combustion
Top three-dimensional view between burning, Fig. 4 (c) are bottom three-dimensional figure between burning；
Fig. 5 is current stabilization segment pipe perspective view and pictorial diagram of the invention, wherein Fig. 5 (a) is current stabilization segment pipe internal structure
Figure, Fig. 5 (b) are steady flow segment pipeline external three-dimensional figure, and Fig. 5 (c) is current stabilization segment pipe material object photo；
Fig. 6 is present invention sampling segment pipe perspective view；
Fig. 7 is present invention sampling segment pipe sectional view；
Fig. 8 is surface temperature variation and voltage curve in the experiment of certain 100% state-of-charge cells burst of money；
Fig. 9 is certain 100% state-of-charge cells burst heat release rate testing curve of money；
Figure 10 is certain money 100% state-of-charge cells burst flue gas (CO and CO2) concentration curve；
Figure 11 is certain money 100% state-of-charge cells burst flue gas (CO and CO2) generating rate curve.
Wherein: 1 between burning, and 2 be current stabilization segment pipe, and 3 be sampling segment pipe, and 4 be thieff hatch, and 5 be gas analyzer, and 6
It is observation window for blower, 7,8 be door, and 9 be connection segment pipe, and 10 be supporting element.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of lithium ion battery combustion experiment platform of the present invention, including 1 between burning, current stabilization segment pipe 2, sampling
Segment pipe 3, thieff hatch 4, gas analyzer 5, blower 6, observation window 7, door 8 connect segment pipe 9 and supporting element 10.Between burning 1 with
Current stabilization segment pipe 2 is connected, and current stabilization segment pipe 2 plays the role of stable combustion product gases, guarantees the accuracy of subsequent sampling；Sampling pipe
Road 3 is connected with current stabilization segment pipe 2, and thieff hatch 4 is arranged on sampling conduit 3, plays the role of sampling and measurement；Gas analyzer
5 are connected with thieff hatch 4, and the flue gas of acquisition enters in gas analyzer 5, analyze gaseous species and concentration；Blower 6 and steady flow segment pipe
The second segment in road 2 is connected, and plays the role of that flue gas is discharged；Observation window 7 and door 8 are arranged on 1 between burning；Connection segment pipe 9
In current stabilization segment pipe 2 and sample the position that between segment pipe 3 and other need to connect；Supporting element 10 is then used to support above-mentioned device
To guarantee safety.
1 specific implementation figure can refer to shown in Fig. 2, Fig. 3 and Fig. 4 between burning, and 1 includes one for experimenter between burning
Pass in and out the door 8 of operation, it is proposed that having a size of 0.6m × 1.6m or so；And include observation window 7,7 design principle of observation window is to guarantee
No visual dead angle in 1 between observation burning.1 adds external steel plate to be welded using stainless steel frame structure between burning, guarantees structure
Robustness, it is proposed that setting wheel+column composite members, wheel can facilitate installation and carrying, column can guarantee be installed after fill
The position fixation set is not easily shifted.Simultaneously as shown in figure 3,1 bottom should be arranged metal mesh structure and facilitate air inlet between burning, to guarantee
Oxygen supply during cells burst.Final design manufacture successfully burning between 1 perspective view as shown in figure 4, burning between 1 size
Can be determined according to the size of build the side, it is proposed that burning between having a size of 1.8m × 1.8m × 1.8m.
2 perspective view of current stabilization segment pipe and pictorial diagram are as shown in figure 5, the mode that welding flabellum in pipeline can be used plays stabilization
The effect of fluids within pipes, meanwhile, pipe ends should be processed into flange disk-form, to facilitate the connection with front and rear pipes.
As shown in Figure 6 and Figure 7,4 or more thieff hatch 4 should be arranged on sampling segment pipe 3, to meet thermocouple, skin
The arrangement of trustship and sampling plastic straw.
To guarantee to sample the stability of flow of flue gas in segment pipe 3, as shown in Figure 1, sampling 3 rear and front end of segment pipe should all
Current stabilization segment pipe 2 is set.Along flow of flue gas direction, front end current stabilization segment pipe 2 should be connected 1 gas outlet between burning, rear end current stabilization
Segment pipe 2 should directly be connected with blower 6.
The installation site of sampling segment pipe 3 should meet following requirement: sampling segment pipe 3 is between 1 gas outlet between preceding end burning
Duct length should be no less than 8 times of pipe diameter curved pipe can be used to extend pipeline if linear distance is unsatisfactory for requiring
Length；Sampling segment pipe 3 should be no less than 4 times of pipe diameter to the duct length between rear end blower 6, if linear distance is discontented
Foot requires, and curved pipe can be used to extend duct length.
Stablize to guarantee that the gas in sampling segment pipe 3 flows, the internal diameter of above-mentioned pipeline should be consistent.Internal diameter of the pipeline is answered
It is determined according to flame power to be measured, the recommended formula between internal diameter of the pipeline d (m) and flame power Q (kW) is formula (1):
The air quantity of blower 6 should be greater than the air quantity of design as far as possible, and internal diameter of the pipeline can be determined according to formula (1), gas in pipelines stream
Fast recommended value is 5~10m/s, the air quantity of design can be estimated according to above-mentioned relation, to select suitable blower 6.
Sampling segment pipe 3 should have plastic straw to be connected with gas analyzer 5, and gas analyzer 5 should have sampling pump, and extraction is adopted
The flue gas being uniformly mixed in sample segment pipe 3, gas analyzer 5 should be able to measure oxygen in gas, carbon dioxide and an oxidation
The concentration of carbon changes, to calculate cells burst heat release rate.Reality can be met by buying gas analyzer common in the market
Test requirement.
As shown in Fig. 1, Fig. 5, Fig. 6, Fig. 7, it is all made of 1 between burning, between current stabilization segment pipe 2, sampling segment pipe 3 and blower 6
Ring flange is connected, and should ensure that and gas leakage does not occur.Between burning 1 and pipeline connection after the completion of, should use supporting element 10 to pipeline
It is supported, supporting element 10 can be used ceiling mounting type structure also and console mode structure can be used.
As shown in figs. 1-7, the making step of cells burst experimental bench of the present invention are as follows: it first makes 1 between the burning of steel construction, then
Current stabilization segment pipe 2 is connected at 1 gas outlet between burning, then the installation site according to sampling segment pipe 3 requires installation sampling
Segment pipe 3, sampling the extra distance between segment pipe 3 and current stabilization segment pipe 2 connection segment pipe 9 can be used to carry out transition connection；It
Current stabilization segment pipe 2 is equally installed in the end of sampling segment pipe 3 afterwards, and is directly connected with blower 6；Finally connected using plastic straw
Sampling segment pipe 3 and gas analyzer 5 are connect, and guarantee safety is supported to pipeline using supporting element 10.Constituting can protect
Confirmation tests personnel safety, can accurately measure the combustion heat and the lithium ion battery combustion experiment platform of gaseous product.Add in burning
Thermal cell to thermal runaway is burnt, that is, be can measure the heat release rate of cells burst process, produced gas type and concentration.
In order to verify the ability to work of the combustion experiment platform, analyzed below by an experiment embodiment.
Embodiment:
In order to verify the power of test of cells burst experimental bench disclosed by the invention, using heater plate money 22Ah's
The lithium ion battery of 100% state-of-charge of LiFePO4/graphite to thermal runaway is burnt, and the battery surface temperature and voltage measured becomes
Change, burning heat release rate curve, combustion product gases (CO and CO2) concentration curve and combustion product gases (CO and CO2) generating rate curve
Respectively as shown in Fig. 8,9,10 and 11.As can be seen that cells burst experimental bench disclosed by the invention is attached to cell cycler and heat
Charged couple device, the heat that can be accurately measured in the voltage and temperature change and combustion process of battery during heating are released
Put rate, CO and CO in pipeline2Concentration, and the production makings amount that can calculate always, calculated result are compared with the document delivered, kiss
Conjunction works well.
In conclusion disclosure sets forth a kind of certifiable experimenters safely, can accurately measure the combustion heat and gas and produce
The lithium ion battery combustion experiment platform of object is added survivability between burning made of stainless steel plate strong stainless steel frame structure,
The safety of external experimenter can be ensured in the case where thermal runaway explosion situation occurs for internal cell；In addition, the combustion experiment platform may be used also
To cooperate the equipment such as cell cycler and thermocouple, battery temperature, voltage change, the combustion heat and flue gas kind can be accurately measured
Class and concentration are a kind of excellent lithium ion battery combustion experimental devices.
Present embodiment does not limit its protection scope, the technology of this field only to exemplary illustration of the invention
Some improvements and modifications that personnel are made without departing from the principle of the present invention should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of lithium ion battery combustion experiment platform, it is characterised in that: including between a firm burning (1), for placing electricity
Pond and heating device not only play the role of collecting combustion product gases, but also battery explosion can be hindered to impact, Protection personnel；Together
When, upper setting observation window (7) and door (8) between burning；Further include a blower (6), play exclusion flue gas, assists the work of sampling
With；Further include at least two sections of current stabilization segment pipes (2), is separately mounted to the front-end and back-end of sampling segment pipe (3), plays stable pipe
Road stream, it is ensured that collected flue gas has been uniformly mixed, using connection segment pipe (9) phase between current stabilization segment pipe and sampling segment pipe
Even；Further include a sampling segment pipe (3), 4 or more thieff hatch (4) is included at least on sampling conduit, for being inserted into thermoelectricity
Even summation connects gas analyzer (5)；Above-mentioned pipeline should be using bottom support or supporting element (10) support of furred ceiling mode, it is ensured that peace
Entirely；A gas analyzer (5) is also included at least, for extracting combustion product gases, measurement burning heat release rate or other burnings
Gas；To formed can guarantee experimenter safely, the lithium ion battery burning that can accurately measure the combustion heat and gaseous product it is real
Test platform.
2. a kind of lithium ion battery combustion experiment platform according to claim 1, it is characterised in that: battery and heating device are put
It sets between firm burning in (1), (1) is connected with current stabilization segment pipe (2) and sampling segment pipe (3) between burning, passes through blower (6)
Exclude flue gas；It extracts combustion product gases to lead to gas analyzer (5), measures burning heat release rate and flue gas type and concentration.
3. a kind of lithium ion battery combustion experiment platform according to claim 1, it is characterised in that: battery and heating device are put
It sets between firm burning in (1), upper setting observation window (7) and door (8) between burning, observation window (7) can be used in directly observation
Portion's battery thermal runaway combustion experiment phenomenon, can also set up video camera and be shot；Door (8) then facilitates the entrance of operator, into
Row battery is arranged with heater, conducting wire connects and thermocouple paste operation；The setting of observation window (7) should follow between observation burning
(1) principle at internal no visual dead angle, the height setting of door (8) should follow operator and slightly bend over that the original of entrance can be facilitated
Then.
4. a kind of lithium ion battery combustion experiment platform according to claim 1, it is characterised in that: between the burning (1)
Tower structure should be used, is process using firm stainless steel plate, steel plate thickness should be not less than 5mm, play safeguard protection
Effect.
5. a kind of lithium ion battery combustion experiment platform according to claim 1, it is characterised in that: current stabilization segment pipe (2)
Number at least two is both needed to arrangement current stabilization segment pipe (2), respectively along gas direction of flow before and after sampling segment pipe (3)
For guaranteeing the influence of the stabilization and removal rear end blower of incoming flow to fluid in sampling segment pipe, current stabilization segment pipe (2) is internal
Flabellum form can be used, play action of turbulent flow.
6. a kind of lithium ion battery combustion experiment platform according to claim 1, it is characterised in that: sampling segment pipe (3)
Position should follow following principle: the duct length from sampling segment pipe (3) gas outlet position of (1) between burning should be many
In 8 times of pipe diameters (8d), if linear distance is not enough to reach requirement, curved pipe can be used to increase preceding segment length；From adopting
Sample segment pipe (3) should be not less than 4 times of pipe diameter (4d) to the duct length of blower (6) position, and curved pipe also can be used
Segment length after increase.
7. a kind of lithium ion battery combustion experiment platform according to claim 1, it is characterised in that: in sampling segment pipe (3)
It should arrange four or more thieff hatch, one of hole is for arranging Pitot tube, for measuring pipeline inner volume flow；Two
Hole is for arranging thermocouple measurement gas in pipelines temperature；One hole connects gas analyzer, spends and takes flue gas in pipeline；And
Redundancy sampling hole is set, for connecting other gas detection apparatus such as Fourier transform infrared spectroscopy gas analyzer.
8. a kind of lithium ion battery combustion experiment platform according to claim 1, it is characterised in that: blower (6) is arranged in pipe
The end in road, and be recommended to use centrifugal blower, fan delivery should be chosen according to the actual situation, and the gas flow rate in pipeline is 5~
10m/s, and according to minimum air quantity needed for the parameter Estimations blower such as pipeline section area, gas flow rate.
9. a kind of lithium ion battery combustion experiment platform according to claim 1, it is characterised in that: above-mentioned internal diameter of the pipeline with to
The flame combustion power of survey is related, and flame power to be measured is bigger, then internal diameter of the pipeline should be thicker, internal diameter of the pipeline d (m) and flame function
Recommended formula between rate Q (kW) is formula (1):
10. a kind of lithium ion battery combustion experiment platform according to claim 1, it is characterised in that: this experimental bench measures lithium
Ion battery burning heat release rate is based on oxygen consumption principle, and the gas analyzer used should at least be capable of measuring O2、CO2With
Tri- kinds of gases of CO buy gas analyzer common in the market；
To guarantee instrument and equipment and operation experiments personnel safety, console mode is used between burning, pipeline or blower are needed using furred ceiling
Or the support of floor-type support part, ensure safety.
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