CN106610365A - Device and detection method used for detection of lithium ion battery expanding gas - Google Patents
Device and detection method used for detection of lithium ion battery expanding gas Download PDFInfo
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- CN106610365A CN106610365A CN201510705425.7A CN201510705425A CN106610365A CN 106610365 A CN106610365 A CN 106610365A CN 201510705425 A CN201510705425 A CN 201510705425A CN 106610365 A CN106610365 A CN 106610365A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
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Abstract
The invention provides a device and a detection method used for detection of lithium ion battery expanding gas. The device comprises a case body used for accommodating liquid mediums in a lithium ion battery to be detected, a case body cover arranged on the top of the case body, and a battery expanding gas component and content detection device, a battery expanding gas volume detection device, and a battery charging and discharging device which are arranged outside the case body. The battery expanding gas component and content detection device and the battery charging and discharging device are connected with the lithium ion battery to be detected respectively; the battery expanding gas volume detection device passes through the case body cover vertically, and stretches into the liquid mediums. The device and the detection method can be used for detecting expanding gas components and content of all types of lithium ion batteries, and reliable data support is provided for targeted selection of expanding inhibition additives in lithium ion battery manufacturing process.
Description
Technical field
The present invention relates to a kind of detection means and detection method, in particular to a kind of lithium ion battery flatulence gas-detecting device and
Its detection method, belongs to technical field of energy storage.
Background technology
Lithium ion battery has that energy density is high, power characteristic is good, has extended cycle life, good environmental adaptability, memory-less effect etc.
Advantage, has broad application prospects in the field such as electric automobile and new forms of energy energy storage.But battery is in use, due to interior
The decomposition of portion's electrolyte, battery occurs flatulence phenomenon.Battery flatulence can make the contact between positive/negative plate will be no longer tight so that
The internal resistance of cell is dramatically increased, and the cycle performance of battery drastically declines, and serious flatulence can cause the generation of cell safety accident.
Many research worker have carried out particular study to the flatulence phenomenon of lithium ion battery.Wherein to the research of flatulence component analyses
More, research shows that the gas that lithium ion battery is produced mainly includes carbon dioxide, carbon monoxide, hydrogen, methane etc., for
Different battery types, the gaseous species of generation have larger difference.The gas overwhelming majority (the quality that such as lithium titanate battery is produced
Score ratio) it is hydrogen, also there is a small amount of carbon monoxide and carbon dioxide；The gas that ferric phosphate lithium cell is produced is mainly titanium dioxide
Carbon and methane；The gas that lithium manganate battery is produced is mainly methane and carbon monoxide.
Existing lithium ion battery flatulence component research is primarily directed to done by flexible packing lithium ion battery.Research shows, soft
Charge and discharge cycles number of times, ambient temperature and the charge and discharge system for packing lithium ion battery has a great impact to battery flatulence speed：
Battery starts the gas production of battery in front 100 circulations of aerogenesis and increases rapid, and with the increase of cycle-index, gas production rate becomes
Slowly；Carry out flatulence gas and carry out detection discovery to shelving battery or charge-discharge battery at 40 DEG C, 55 DEG C, 70 DEG C and 80 DEG C：
Under different temperatures, battery flatulence produces the species of gas does not have great changes, illustrates that temperature does not affect on the species of side reaction,
But the speed that gas is produced is accelerated with the rising of ambient temperature.In addition flatulence speed, gaseous species also with electrolyte in battery
Solvent composition, additive types and electrolyte addition have certain relation.
Because duricrust battery takes, gas is inconvenient, and appearance is not obvious during flatulence, to the battery of duricrust lithium ion in prior art
Flatulence study mechanism is less, and the analysis to flatulence mechanism has larger difference：Some researcheres think the swollen of lithium ion battery with hard shell
Gas phenomenon is that a small amount of moisture existed by inside battery causes, and Moisture inducement electrolyte decomposition is so as to producing more hydrogen and alkane
Hydrocarbon.Researcher also think the flatulence phenomenon of lithium ion battery with hard shell be by electrode material in transition metal catalized cause
Electrolyte decomposition accelerates caused.Lithium ion battery with hard shell flatulence mechanism it is unintelligible, directly result in suppression lithium ion battery with hard shell
The technological means of flatulence phenomenon are indefinite.
The existing Main Means for suppressing lithium ion battery with hard shell flatulence are to reduce ambient humidity and in the electrolytic solution when battery makes
The specific suppression flatulence additive of addition.But reducing battery production environment humidity larger will improve lithium ion battery cost of manufacture,
And add suppress the method for flatulence additive relatively difficult in the electrolytic solution, it is primarily due to for lithium ion battery with hard shell flatulence machine
Reason research is not thorough, not strong to the specific aim of the suppression flatulence additive selected by different type lithium ion battery with hard shell, suppresses swollen
The DeGrain of gas.
The content of the invention
Above-mentioned deficiency in the presence of in order to solve prior art, the present invention provides a kind of lithium ion battery flatulence gas-detecting device,
The detection of all types of lithium ion battery flatulence gas components and content is capable of achieving using the detection means, by flatulence gas
The accurate analysis of component and content, can derive it is that may be present generation flatulence gas chemical equation, so as to for different lithium from
Sub- battery suppress in manufacturing process flatulence additive can specific aim choose reliable technical support be provided.
The present invention provide technical scheme be：A kind of lithium ion battery flatulence gas-detecting device, it is theed improvement is that：It is described
Device includes its internal casing equipped with liquid medium for accommodating the lithium ion battery, located at the casing of the casing top
Lid, the battery flatulence gas component outside the casing and content detection device, battery flatulence gas volume detection means and electricity
Pond discharge and recharge instrument；The battery flatulence gas component and content detection device and the battery charging and discharging instrument respectively with the lithium ion
Battery connects；The battery flatulence gas volume detection means is extended vertically through and stretched into after the Box Cover in the liquid medium.
Preferably, described device also includes the temperature sensor for measuring lithium ion battery flatulence gas temperature；The casing
The outlet of temperature sensor connecting line is left on the wall of side；The temperature sensor phase outside one end of temperature sensor connecting line and casing
Even, its other end is connected through temperature sensor connecting line outlet with one end of the lithium ion battery；The temperature sensing
After device connecting line is drawn by temperature sensor connecting line outlet, in the temperature sensor connecting line exit sealing is coated with
Glue.
Preferably, the lithium ion battery is the rectangular battery being immersed in the liquid medium；The homonymy of the rectangular battery sets
There is positive and negative electrode；The casing is the hexahedron that volume is adapted with the rectangular battery, is correspondingly provided with the side wall of the casing
Positive and negative electrode wiring outlet；One end of positive terminal and negative terminal connects respectively the positive and negative electrode, the other end by it is described just
Negative electrode wiring outlet leads to and be connected with the battery charging and discharging instrument behind the casing outside；
The casing makes of lucite, and the positive terminal and the negative terminal are drawn by the both positive and negative polarity wiring outlet
Afterwards, it is coated with fluid sealant at the both positive and negative polarity wiring outlet.
Preferably, the battery flatulence gas volume detection means be cubing bucket, leave on the Box Cover external diameter with it is described
The adaptable through hole of the cross-sectional diameter of cubing bucket；The liquid is stretched into after the through hole in the bottom of the cubing bucket
In body medium；Scale is carried on the cubing bucket, for reading the volume of ascending liquid medium, the ascending liquid medium
Volume be equal to the lithium ion battery flatulence gas volume；
The liquid medium is PFPE；The cubing bucket and the Box Cover make of lucite, the volume
Measurement bucket is provided with fluid sealant with the seam crossing of the Box Cover.
Preferably, sealing gasket or fluid sealant are provided between the Box Cover and the casing, for strengthening the sealing of the casing
Property.
Further, it is additionally provided with battery exhaust outlet on the wall box that the temperature sensor connecting line outlet is located；Battery
One end of exhaustor is connected with the lithium ion battery, and its other end passes through four-way connector after the battery exhaust outlet
It is connected with content detection device with battery flatulence gas component；Fluid sealant is coated with the battery exhaust outlet.
Further, the four-way connector includes four interfaces being interconnected, and two of which interface connects respectively the battery row
Trachea and pressure transducer, two other interface connects respectively air extractor and battery flatulence gas component and content detection device；
The four-way connector is additionally provided with gas valve with the junction of the air extractor；
The battery flatulence gas component is chromatography of gases-GC-MS with content detection device, swollen for sampling lithium ion battery
Gas gas, and analyze the component and volume content percentage ratio shared by every kind of component of flatulence gas；
Further, the fluid sealant compares 1 by the first glue and the second glue with weight:1 is mixed；
First glue is made up of the material component of following parts by weight：Epoxy resin 9, acetone 9, aluminium hydroxide 2, hydrogen
Magnesium oxide 2, APP 2；
Second glue is made up of the material component of following parts by weight：Acetone 12, poly- aminoacyl resin 12.
Another object of the present invention is to the lithium ion battery flatulence gas detection method that a kind of above-mentioned detection device is realized is provided,
Methods described includes：Periodicity charging and discharging, and record period cycle-index and charge/discharge capacity are carried out to lithium ion battery；
Detection lithium ion battery flatulence gas volume V, flatulence gas temperature T and flatulence gas pressure intensity P；According toCalculate lithium
Amount N of ion battery flatulence gaseous matter, wherein R is ideal gas constant；Lithium ion battery flatulence gas is sampled,
And analyze the volume content percentage ratio C in sample shared by the component of gas and every kind of component；Volume according to shared by every kind of component contains
Every kind of component M is total in the amount N calculating lithium ion battery flatulence gas of amount percentage ratio C and lithium ion battery flatulence gaseous matter
Amount N of materialM：NM=N × C.
Preferably, methods described also includes：According to the charging-discharging cycle and charge/discharge capacity and lithium of the lithium ion battery from
The amount of the component of sub- battery flatulence gas and every kind of component total material draws curve；Analysis lithium ion battery flatulence gas component and every
The amount of component total material is planted with lithium ion battery charging-discharging cycle and the Changing Pattern of charge/discharge capacity；According to the Changing Pattern point
Analysis lithium ion battery produces the chemical equation of flatulence gas.
Compared with immediate prior art, the present invention has following marked improvement：
1) detection means that the present invention is provided is capable of achieving inside lithium ion cell flatulence gas temperature, flatulence gas volume and flatulence gas
Detect while body pressure and component, the component and content of lithium ion battery flatulence gas can be at any time analyzed, to derive generation lithium
The chemical equation of ion battery flatulence gas has established data basis, is that lithium ion battery is targetedly selected in manufacturing process
Take suppression flatulence additive and provide reliable data supporting.
2) provided by the present invention for sealing the fluid sealant low production cost of each interface, adhesive strength is high, and good sealing effect can
Further increase the sealing of casing；The accuracy of lithium ion battery flatulence gas volume measurement is improved, so as to improve whole detection
The reliability of device testing result.
Description of the drawings
The structural representation of the lithium ion battery flatulence gas-detecting device that Fig. 1 is provided for the present invention；
Fig. 2 is the structural representation of liquid medium in cubing bucket and casing in Fig. 1；
Fig. 3 is the structural representation of lithium ion battery；
Fig. 4 is the structural representation of four-way connector；
Fig. 5 is the system block diagram of lithium ion battery flatulence gas-detecting device；
Wherein 1- cubings bucket；2- Box Covers；3- casings；4- positive and negative electrode wiring outlets；5- bolts；6- sealing gaskets；
7- temperature sensors connecting line is exported；8- battery exhaust outlets；9- liquid mediums；10- lithium ion batteries；11- anelectrodes；
12- negative electrodes；13- positive terminals and negative terminal；14- temperature sensor connecting lines；15- temperature sensors；16- battery aerofluxuss
Pipe；17- four-way connectors；18- gas sample mouths；19- pressure transducers；20- gas valves；21- bleeding points.
Specific embodiment
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
In order to thoroughly understand the embodiment of the present invention, detailed structure will be proposed in following description.Obviously, the embodiment of the present invention
Execution be not limited to the specific details that those skilled in the art is familiar with.Presently preferred embodiments of the present invention is described in detail as follows,
But in addition to these detailed descriptions, the present invention can also have other embodiment.
The structural representation of the flatulence gas-detecting device of lithium ion battery 10 that the present invention is provided is as shown in Figure 1：Described device includes
For accommodating its internal casing 3 equipped with liquid medium 9 of the lithium ion battery 10, located at the casing at the top of the casing 3
Lid 2, the battery flatulence gas component outside the casing 3 and content detection device, battery flatulence gas volume detection means
With battery charging and discharging instrument；The battery flatulence gas component and content detection device and the battery charging and discharging instrument respectively with the lithium
Ion battery 10 connects；The battery flatulence gas volume detection means extends vertically through and liquid Jie is stretched into after the Box Cover 2
In matter 9.
The flatulence gas volume V of lithium ion battery 10 is capable of achieving with the battery flatulence gas volume detection means in above-mentioned detection device
Detection；The institute being capable of achieving with flatulence gas component in pond in above-mentioned detection device and content detection device in on-line checking flatulence gas
There are component, and volume content percentage ratio situation C of the total volume of every kind of component M；Volume V is with the product of percentage ratio C
Volume shared by every kind of component in flatulence gas.
As shown in Figure 2：The battery flatulence gas volume detection means is cubing bucket 1, is left on the Box Cover 2 outer
The footpath through hole adaptable with the cross-sectional diameter of the cubing bucket 1, is fixed between Box Cover 2 and casing 3 by bolt 5；
Stretch in the liquid medium 9 after the through hole bottom of the cubing bucket 1；Carry on the cubing bucket 1
Scale, for reading the volume of ascending liquid medium 9, the volume of the ascending liquid medium 9 is equal to the lithium ion battery 10
Flatulence gas volume；When there is flatulence using battery, the volume that liquid medium 9 rises is detecting battery flatulence gas volume.
The liquid medium 9 is PFPE, and this is one kind not volatile compound under room temperature high-temperature condition, utilizes this
Planting chemicals can improve the accuracy of battery flatulence gas volume detection as liquid medium 9；The cubing bucket 1 and institute
State Box Cover 2 to make of lucite, the cubing bucket 1 is provided with fluid sealant with the seam crossing of the Box Cover 2, can
For strengthening the sealing property of casing 3, the accuracy of battery flatulence gas volume detection is improved.
As shown in Figure 3：The lithium ion battery 10 is the rectangular battery being immersed in the liquid medium 9；The rectangular battery
Homonymy be provided with positive and negative electrode, its opposite side is connected with battery exhaustor 16 and temperature sensor connecting line 14；The casing 3
For the hexahedron that volume is adapted with the rectangular battery, positive and negative electrode wiring outlet is correspondingly provided with the side wall of the casing 3
4；One end of positive terminal and negative terminal 13 connects respectively the positive and negative electrode, and the other end is drawn by the positive and negative electrode wiring
Mouth 4 leads to and be connected with the battery charging and discharging instrument behind the outside of the casing 3；
The casing 3 makes of lucite, and the positive terminal and the negative terminal are drawn by the both positive and negative polarity wiring outlet
After going out, fluid sealant is coated with the both positive and negative polarity wiring outlet, for strengthening the sealing of casing 3.
Sealing gasket 6 or fluid sealant are provided between the Box Cover 2 and the casing 3, for strengthening the sealing of the casing 3
Property.
In order to further measure the temperature of battery flatulence gas：The present invention by outside casing 3 arrange temperature sensor 15 come
Temperature T of the measurement flatulence gas of lithium ion battery 10.Temperature sensor connecting line outlet 7 is left on the side wall of the casing 3；
One end of temperature sensor connecting line 14 is connected with the temperature sensor 15 outside casing 3, and its other end runs through the temperature
Sensor connecting line outlet 7 is connected with one end of the lithium ion battery 10；The temperature sensor connecting line 14 is by the temperature
After degree sensor connecting line outlet 7 is drawn, at temperature sensor connecting line outlet 7 fluid sealant is coated with；For strengthening
The seal of casing 3.
Battery exhaust outlet is additionally provided with the side wall of casing 3 that the temperature sensor connecting line outlet 7 is located；Battery aerofluxuss
One end of pipe 16 is connected with the lithium ion battery 10, and its other end is after the battery exhaust outlet outside casing 3
It is connected with content detection device by four-way connector 17 and battery flatulence gas component；It is coated with the battery exhaust outlet
Fluid sealant, for strengthening the sealing of casing 3.
As shown in Figure 4：In order to further detect the pressure of the flatulence gas of lithium ion battery 10, the four-way connector 17 includes
Four interfaces being interconnected, two of which interface connects respectively the battery exhaustor 16 and pressure transducer 19, and in addition two
Individual interface connects respectively air extractor and battery flatulence gas component and content detection device；The four-way connector 17 is taken out with described
The junction of device of air is additionally provided with gas valve 20；Due to battery inside original state close vacuum, therefore start gas
Air extractor evacuation should be passed through before detection, it is ensured that battery connecting tube inner vacuum, be then shut off gas valve 20.
The battery flatulence gas component is chromatography of gases-GC-MS with content detection device, for sampling lithium ion battery
10 flatulence gases, and analyze the component and volume content percentage ratio shared by every kind of component of flatulence gas；
In order to further strengthen the sealing of casing 3, the fluid sealant compares 1 by the first glue and the second glue with weight:1 mixing system
Into；
First glue is made up of the material component of following parts by weight：Epoxy resin 9, acetone 9, aluminium hydroxide 2, hydrogen
Magnesium oxide 2, APP 2；
Second glue is made up of the material component of following parts by weight：Acetone 12, poly- aminoacyl resin 12.
Above-mentioned fluid sealant can be adopted and made with the following method：
(1) take 9 parts of acetone to be added in 9 parts of low viscosity epoxy resins, stirred with stainless steel bar so that low viscosity epoxy resin
It is dissolved into thin glue；Add 2 parts of 2 parts of aluminium hydroxide, 2 parts of magnesium hydroxide and APP in glue successively, continue
Stirred with stainless steel bar, until stirring to form the first glue；
(2) 12 parts of acetone are taken to be added in 12 parts of poly- aminoacyl resins, is stirred with stainless steel bar, until forming uniform thick
Second glue；
(3) the first glue is mixed with the second glue, is stirred with stainless steel bar so as to fluid sealant is formed after mix homogeneously.
Using fluid sealant low production cost made by above-mentioned material, adhesive strength is high, and good sealing effect can further increase casing
3 sealing；The accuracy of the flatulence gas volume of lithium ion battery 10 measurement is improved, so as to improve whole detection means detection knot
The reliability of fruit.
Fig. 5 is the system block diagram of whole detection means：Middle battery flatulence in-situ measurement device can measure lithium ion battery 10
Flatulence gas is in the temperature at any one moment, pressure and volume；The battery charging and discharging instrument on the left side realizes the week of lithium ion battery 10
Phase property charging and discharging；The chromatography of gases and mass spectrum on the right be used in conjunction instrument can on-line analyses go out the component and every kind of component of flatulence gas
Volume content percentage ratio of the total volume.
The present invention also provides the flatulence gas detection method of lithium ion battery 10 that a kind of above-mentioned detection device is realized, methods described bag
Include：Periodicity charging and discharging, and record period cycle-index and charge/discharge capacity are carried out to lithium ion battery 10；Detection lithium from
The flatulence gas volume V of sub- battery 10, flatulence gas temperature T and flatulence gas pressure intensity P；According toCalculate lithium ion
Amount N of the flatulence gaseous matter of battery 10, wherein R is ideal gas constant；The flatulence gas of lithium ion battery 10 is sampled,
And analyze the volume content percentage ratio C in sample shared by the component of gas and every kind of component；Volume according to shared by every kind of component contains
Amount N of amount percentage ratio C and the flatulence gaseous matter of lithium ion battery 10 calculates every kind of component M in the flatulence gas of lithium ion battery 10
Total material amount NM：NM=N × C.
For example：Lithium ion battery 10 circulates amount N of the total material of the 5th week flatulence component M and each component MMAnalysis：
(1) flatulence air volume V during circulating battery the 5th week is read5, temperature T5, pressure P5,
(2) according to formulaCalculate gas production N total during battery circulation in the 5th week5；
(3) gas component M by the analysis of gas chromatograph-mass spectrometer on-line period now5With component M5Shared volume
Percentage composition C5：If there is carbon monoxide, during battery circulation in the 5th week, amount N of the total material of carbon monoxideco5=N5×C5；
In the same manner, amount N of the total material of the carbon monoxide of the 20th week is circulatedco20：Nco20=N20×C20；Other gas components, such as
Hydrogen, methane, carbon dioxide are analyzed according to method measurement is equally sent out.
In addition, according to the charging-discharging cycle and charge/discharge capacity and the flatulence gas of lithium ion battery 10 of the lithium ion battery 10
Component and the amount of every kind of component total material can also draw corresponding curve, for analyzing the flatulence gas component of lithium ion battery 10
With the amount of every kind of component total material with the charging-discharging cycle of lithium ion battery 10 and the Changing Pattern of charge/discharge capacity；Advised by the change
Rule can analyze the chemical equation that lithium ion battery 10 produces flatulence gas with reference to existing chemical reaction rule.
Finally it should be noted that：Above example only to illustrate technical scheme rather than a limitation, although reference
Above-described embodiment has been described in detail to the present invention, and those of ordinary skill in the art still can be to the concrete of the present invention
Embodiment is modified or equivalent, these any modifications or equivalent without departing from spirit and scope of the invention,
Applying within pending claims.
Claims (10)
1. a kind of lithium ion battery flatulence gas-detecting device, it is characterised in that：Described device includes its internal casing equipped with liquid medium for accommodating the lithium ion battery, located at the Box Cover of the casing top, the battery flatulence gas component outside the casing and content detection device, battery flatulence gas volume detection means and battery charging and discharging instrument；The battery flatulence gas component is connected respectively with content detection device and the battery charging and discharging instrument with the lithium ion battery；The battery flatulence gas volume detection means is extended vertically through and stretched into after the Box Cover in the liquid medium.
2. lithium ion battery flatulence gas-detecting device according to claim 1, it is characterised in that：
Described device also includes the temperature sensor for measuring lithium ion battery flatulence gas temperature；The outlet of temperature sensor connecting line is left on the side wall of the casing；One end of temperature sensor connecting line is connected with the temperature sensor outside casing, and its other end is connected through temperature sensor connecting line outlet with one end of the lithium ion battery；After the temperature sensor connecting line is drawn by temperature sensor connecting line outlet, in the temperature sensor connecting line exit fluid sealant is coated with.
3. lithium ion battery flatulence gas-detecting device according to claim 1, it is characterised in that：
The lithium ion battery is the rectangular battery being immersed in the liquid medium；The homonymy of the rectangular battery is provided with positive and negative electrode；The casing is the hexahedron that volume is adapted with the rectangular battery, and positive and negative electrode wiring outlet is correspondingly provided with the side wall of the casing；One end of positive terminal and negative terminal connects respectively the positive and negative electrode, and the other end is led to by the positive and negative electrode wiring outlet and be connected with the battery charging and discharging instrument behind the casing outside；
After casing lucite making, the positive terminal and the negative terminal are by both positive and negative polarity wiring outlet extraction, at the both positive and negative polarity wiring outlet fluid sealant is coated with.
4. lithium ion battery flatulence gas-detecting device according to claim 1, it is characterised in that：
The battery flatulence gas volume detection means is cubing bucket, and the external diameter through hole adaptable with the cross-sectional diameter of the cubing bucket is left on the Box Cover；Stretch in the liquid medium after the through hole bottom of the cubing bucket；Scale is carried on the cubing bucket, for reading the volume of ascending liquid medium, the volume of the ascending liquid medium is equal to the lithium ion battery flatulence gas volume；
The liquid medium is PFPE；The cubing bucket and the Box Cover make of lucite, and the cubing bucket is provided with fluid sealant with the seam crossing of the Box Cover.
5. lithium ion battery flatulence gas-detecting device according to claim 1, it is characterised in that：
Sealing gasket or fluid sealant are provided between the Box Cover and the casing, for strengthening the sealing of the casing.
6. lithium ion battery flatulence gas-detecting device according to claim 2, it is characterised in that：
Battery exhaust outlet is additionally provided with the wall box that the temperature sensor connecting line outlet is located；One end of battery exhaustor is connected with the lithium ion battery, and its other end is connected by four-way connector and battery flatulence gas component after the battery exhaust outlet with content detection device；Fluid sealant is coated with the battery exhaust outlet.
7. lithium ion battery flatulence gas-detecting device according to claim 6, it is characterised in that：
The four-way connector includes four interfaces being interconnected, and two of which interface connects respectively the battery exhaustor and pressure transducer, and two other interface connects respectively air extractor and battery flatulence gas component and content detection device；The four-way connector is additionally provided with gas valve with the junction of the air extractor；
The battery flatulence gas component is chromatography of gases-GC-MS with content detection device, for sampling lithium ion battery flatulence gas, and analyzes the component and volume content percentage ratio shared by every kind of component of flatulence gas.
8. the lithium ion battery flatulence gas-detecting device according to any one in claim 2-6, it is characterised in that：
The fluid sealant compares 1 by the first glue and the second glue with weight:1 is mixed；
First glue is made up of the material component of following parts by weight：Epoxy resin 9, acetone 9, aluminium hydroxide 2, magnesium hydroxide 2, APP 2；
Second glue is made up of the material component of following parts by weight：Acetone 12, poly- aminoacyl resin 12.
9. the lithium ion battery flatulence gas detection method that the detection means in a kind of use claim 2-8 described in any one is realized, it is characterised in that：Methods described includes：Periodicity charging and discharging, and record period cycle-index and charge/discharge capacity are carried out to lithium ion battery；Detection lithium ion battery flatulence gas volume V, flatulence gas temperature T and flatulence gas pressure intensity P；According toAmount N of lithium ion battery flatulence gaseous matter is calculated, wherein R is ideal gas constant；Lithium ion battery flatulence gas is sampled, and analyzes the volume content percentage ratio C in sample shared by the component of gas and every kind of component；Amount N of volume content percentage ratio C and lithium ion battery flatulence gaseous matter according to shared by every kind of component calculates amount N of the total material of every kind of component M in lithium ion battery flatulence gasM：NM=N × C.
10. detection method according to claim 9, it is characterised in that：
Methods described also includes：Curve is drawn according to the amount of the charging-discharging cycle and charge/discharge capacity of the lithium ion battery and the component of lithium ion battery flatulence gas and every kind of component total material；The amount of analysis lithium ion battery flatulence gas component and every kind of component total material is with lithium ion battery charging-discharging cycle and the Changing Pattern of charge/discharge capacity；The chemical equation of flatulence gas is produced according to the analysis on change lithium ion battery.
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| CN112213406A (en) * | 2019-11-21 | 2021-01-12 | 蜂巢能源科技有限公司 | Method and system for measuring amount of gas in battery cell |
| CN113471597A (en) * | 2021-05-21 | 2021-10-01 | 广东电网有限责任公司广州供电局 | Reusable liquid metal battery device |
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