CN108802276A - Gas production test system for battery cell - Google Patents
Gas production test system for battery cell Download PDFInfo
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- CN108802276A CN108802276A CN201710304889.6A CN201710304889A CN108802276A CN 108802276 A CN108802276 A CN 108802276A CN 201710304889 A CN201710304889 A CN 201710304889A CN 108802276 A CN108802276 A CN 108802276A
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- 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
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- 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
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Abstract
The invention discloses a cell gas production test system, which comprises: the sealing test box is used for accommodating the battery cell and is provided with an air inlet and an air outlet; the inert gas source is connected with the gas inlet through a gas inlet pipeline; and the analysis device is connected with the gas outlet through a gas outlet pipeline, wherein the gas outlet pipeline is provided with a connector, and the connector is connected with a vacuum pump through a first pipeline. Compared with the prior art, the cell gas production test system has the following advantages: 1) the gas production behavior of the battery cell at each moment can be monitored in real time, and the testing precision is accurate; 2) the analysis device is adopted to detect the gas components and the content of the gas generated by the battery cell, so that the qualitative and quantitative analysis of the gas generated by the battery cell is realized; 3) the battery cell is ensured to be in inert atmosphere in the whole gas production test, and dangerous accidents are avoided.
Description
Technical field
The invention belongs to battery technology fields, it is more particularly related to which a kind of battery core aerogenesis tests system.
Background technology
Lithium ion battery will appear aerogenesis phenomenon during making and use.Battery core aerogenesis caused by different reasons
Mechanism it is different, the accounting between gas generating component and each component is different, and for caused by same reason
Battery core aerogenesis, gas generating component and accounting also can be different because of material, electrolyte prescription and use environment.For being melted into aerogenesis,
The gas that ethylene carbonate, propene carbonate and methyl ethyl carbonate generate in formation process is different.In addition, being stored in battery core
Cheng Zhong, with the variation of battery core charged state (SOC), there is difference in gas generating component.Therefore, the gas component to battery core aerogenesis and
The accounting of each component is studied, and battery core gas production mechanism can be analysed in depth, for optimization material and electrolyte prescription design, battery core
Production process, battery core use condition etc. provide theories integration, and then improve battery core aerogenesis, improve battery core service life.
Currently, the prior art analyzes aerogenesis using gas chromatograph (GC), i.e., take air tube from the electricity of flatulence using GC
Core inner extracts a certain amount of gas, then this portion gas injection GC is tested, to determine the component and proportioning of aerogenesis.
But the prior art has the following problems：1) it is easy to be interfered by air in the process for taking gas and sample introduction, cause
Test result deviates actual value；2) when battery core aerogenesis is very few, GC, which takes air tube almost, can not extract in gas or the gas of extraction
The overwhelming majority is air, therefore can not obtain valid data；3) can not aerogenesis situation of the in-situ characterization battery core in each stage, with
For battery core overcharges, to aerogenesis behavior of analysis battery core during overcharging, then the battery core for taking large quantities of same designs is needed,
Each battery core is charged to different SOC, then GC tests are carried out to the aerogenesis of each battery core, and then is associated with change of the aerogenesis with SOC
Change situation, the above method is difficult to ensure the consistency of battery core and accurate test condition.
In view of this, it is necessory to provide a kind of safely controllable battery core aerogenesis test system.
Invention content
It is an object of the invention to：A kind of safely controllable battery core aerogenesis test system is provided, can efficiently and accurately be determined
The aerogenesis of property and quantitative analysis battery core.
For achieving the above object, the present invention provides a kind of battery core aerogenesis test system comprising：
Sealing test box is equipped with air inlet and gas outlet for accommodating battery core；
Inert gas source is connect with air inlet by air inlet pipeline；And
Analytical equipment is connect with gas outlet by outlet pipe；
Wherein, outlet pipe is equipped with interface, and interface has vacuum pump by the first piping connection.
A kind of improvement of system is tested as battery core aerogenesis of the present invention, the battery core aerogenesis test system is further provided with control
Case processed, the carrier gas from inert gas source enter the sealing test box, sealing test box by the air inlet pipeline through control cabinet
The gas of outflow enters the analytical equipment by the outlet pipe through control cabinet.
A kind of improvement of system is tested as battery core aerogenesis of the present invention, first pipeline includes the voltage stabilizing being connected with each other
Valve, first flowmeter and the first solenoid valve.
A kind of improvement of system is tested as battery core aerogenesis of the present invention, second pipeline includes the second electricity being connected with each other
Magnet valve, three linked piece, second flowmeter and relief valve.
A kind of improvement that system is tested as battery core aerogenesis of the present invention is equipped with true between the gas outlet and second solenoid valve
Sky is counted, and third solenoid valve is equipped in first pipeline.
A kind of improvement of system is tested as battery core aerogenesis of the present invention, the sealing test box includes firm banking, places
In the seal cover board of testing cassete cavity and sealing test box cavity on firm banking.
A kind of improvement of system is tested as battery core aerogenesis of the present invention, be equipped with above the testing cassete cavity visual windows and
Binding post positioned at visual windows both sides, binding post inside and outside the testing cassete cavity, back panel wiring column draw positive and negative anodes wiring with
Battery core connects, and external cabling column draws positive and negative anodes wiring and is connected with electrochemical workstation.
A kind of improvement of system is tested as battery core aerogenesis of the present invention, testing cassete cavity both sides are equipped with geometrical clamp, institute
It states seal cover board and is equipped with fixed clip, fixed clip fastens with geometrical clamp and is equipped with sealing ring at fastening.
As a kind of improvement of battery core aerogenesis of the present invention test system, the one of separate testing cassete cavity on the seal cover board
Side-lower is equipped with standard gas intake valve.
As battery core aerogenesis of the present invention test system a kind of improvement, the analytical equipment include thermal analyzer, infrared point
One or more of analyzer, gas chromatograph and mass spectrograph.
Compared with the existing technology, battery core aerogenesis test system of the present invention has following advantageous effects：1) it can supervise in real time
Aerogenesis behavior of the battery core at each moment is surveyed, there is accurate measuring accuracy；2) gas of the analytical equipment to battery core aerogenesis is used
Ingredient and content are detected, and realize the qualitative and quantitative analysis to battery core aerogenesis；3) it ensure that battery core is surveyed in entire aerogenesis
It is in inert atmosphere in examination, avoids having an accident；4) solve detected in existing test method limit for height, error it is big with it is consistent
Property difference problem, battery core gas production mechanism can be analysed in depth, for optimization material, electrolyte prescription, battery core production process, use condition
Deng offer theories integration, and then improve battery core aerogenesis, improves battery core service life.
Description of the drawings
With reference to the accompanying drawings and detailed description, to battery core aerogenesis of the present invention test system and its advantageous effects into
Row is described in detail, wherein：
Fig. 1 is the schematic diagram that battery core aerogenesis of the present invention tests system.
Fig. 2 is the structural schematic diagram of sealing test box in battery core aerogenesis test system of the present invention.
Fig. 3 is the structural schematic diagram of the testing cassete cavity of sealing test box in battery core aerogenesis test system of the present invention.
Fig. 4 is the A direction views of testing cassete cavity shown in Fig. 3.
Fig. 5 is the structural schematic diagram of the seal cover board of sealing test box in battery core aerogenesis test system of the present invention.
Wherein, the reference numerals are as follows:
10 sealing test box, 122 standard gas intake valve, 504 vacuum pump
100 air inlet, 20 inert gas source, 506 second solenoid valve
102 gas outlet, 30 air inlet pipeline, 508 three linked piece
104 firm banking, 302 pressure maintaining valve, 510 second flowmeter
106 testing cassete cavity, 304 first flowmeter, 512 relief valve
108 306 first solenoid valve of seal cover board, 514 vacuum meter
110 geometrical clamp, 40 analytical equipment, 516 third solenoid valve
112 visual windows, 50 outlet pipe, 60 control cabinet
114 binding post, 500 interface, 602 liquid crystal display
120 fix 502 first pipeline of clip, 70 electrochemical workstation
Specific implementation mode
In order to make goal of the invention, technical solution and its advantageous effects of the present invention be more clear, below in conjunction with attached drawing
And specific implementation mode, the present invention will be described in further detail.It should be understood that specific reality described in this specification
Mode is applied just for the sake of explaining the present invention, is not intended to limit the present invention.
Refering to Figure 1, battery core aerogenesis test system of the present invention includes：
Sealing test box 10 is equipped with air inlet 100 and gas outlet 102 for accommodating battery core (not shown)；
Inert gas source 20 is connect with air inlet 100 by air inlet pipeline 30；And
Analytical equipment 40 is connect with gas outlet 102 by outlet pipe 50；
Wherein, outlet pipe 50 is equipped with interface 500, and interface 500 is connected with vacuum pump 504 by the first pipeline 502, the
One pipeline 502 is equipped with third solenoid valve 516, and vacuum pump 504 is vacuumized for that will test inside seal box 10.
Inert gas source 20 is helium, provides carrier gas for test system, is provided by helium gas cylinder.
Battery core aerogenesis test system is further provided with control cabinet 60, and the carrier gas from inert gas source 20 passes through air inlet pipeline 30
Enter sealing test box 10 through control cabinet 60, the gas that sealing test box 10 flows out is entered by outlet pipe 50 through control cabinet 60
Analytical equipment 40.Control cabinet 60 is for controlling the flow for flowing in and out 10 gas of sealing test box and air pressure, on control cabinet 60
Equipped with liquid crystal display 602, liquid crystal display 602 can show and adjust the vacuum degree in entire sealing test box 10 and air pressure
Value, while the break-make of controllable internal all pipe valves.
Air inlet pipeline 30 includes pressure maintaining valve 302, first flowmeter 304 and the first solenoid valve 306 being connected with each other.It is first-class
Gauge 304 detect the gas flow in air inlet pipeline 30 and by fructufy when include on the liquid crystal display 602 of control cabinet 60,
Meanwhile the break-make of the first solenoid valve 306 can also be controlled by liquid crystal display 602, to control air inlet pipe in air inlet 100
The break-make on road 30.
It please refers to shown in Fig. 2, sealing test box 10 includes firm banking 104, the testing cassete being positioned on firm banking 104
The seal cover board 108 of cavity 106 and sealing test box cavity 106.Sealing test box 10 is made of metal, and preferably SUS is not
Steel become rusty to ensure the intensity and explosion-proof performance of sealing test box 10.Insulating coating is coated with inside sealing test box 10 to insulate
Protection, preferably teflon coatings.
Firm banking 104 is solid construction, to ensure that the steady of sealing test box 10, firm banking 104 are equipped with sealing
Cover board support, to hold seal cover board 108.
It please refers to Fig.1 to shown in Fig. 5,106 both sides of testing cassete cavity are equipped with geometrical clamp 110, and seal cover board 108 is equipped with solid
Clamp button 120, fixed clip 120 fasten with geometrical clamp 110 and are equipped with sealing ring at fastening.Testing cassete cavity 106 and sealing cover
At the fastening of plate 108 be equipped with width be 15mm viton seal ring, be further ensured that fasten after sealing test box cavity 106 it is close
Feng Xing.The centre of 106 top of testing cassete cavity is equipped with visual windows 112, and visual windows 112 are transparent toughened glass, visually
Window 112 is used to observe the internal state of sealing test box 10.Testing cassete cavity 106, which is equipped with, is located at 112 both sides of visual windows
Binding post 114 (positive terminal and negative terminal rod structure are not distinguished in this specification), binding post 114 is through test
Inside and outside box cavity 106, back panel wiring column 114 is drawn positive and negative anodes wiring and is connect with battery core, and external cabling column 114 is drawn positive and negative anodes and connect
Line is connected with electrochemical workstation 70.Electrochemical workstation 70 is the equipment that can carry out charge and discharge to lithium ion battery, including
New prestige machine, Macco machines and Arbin machines.Outside the positive and negative anodes line and sealing test box 10 that electrochemical workstation 70 is drawn just
Negative terminal 114 is connected, and sealing test box 10 is made to realize the charging/discharging function to its inside battery core.
It please refers to shown in Fig. 2 and Fig. 5, a side-lower of the seal cover board 108 far from testing cassete cavity 106 is equipped with standard gas air inlet
Valve 122, for toward injecting standard gas inside sealing test box 10.Standard gas intake valve 122 is by fluorubber sealant and metal threaded cap
Composition, unscrews metal threaded cap, and GC sample introduction needle-penetration fluorubber sealants can be used to squeeze into standard gas (mark in sealing test box 10
Gas component and accounting are it is known that internal standard as aerogenesis quantitative analysis), standard gas tightens metal threaded cap after testing, and prevents box
Interior gas leakage.
Outlet pipe 50 includes second solenoid valve 506, three linked piece 508, second flowmeter 510 and the relief valve being connected with each other
512.In the shown embodiment, vacuum meter 514 is equipped between gas outlet 102 and second solenoid valve 506, vacuum meter 514 can be real
When monitoring sealing test box 10 in air pressure and the results are shown on liquid crystal display 602, liquid crystal display 602 passes through control
Second solenoid valve 506 controls the break-make of outlet pipe 50, and three linked piece 508 can ventilate every liquid, pass through the electrolysis in filter pipeline
Liquid, avoids electrolyte contamination analytical equipment 40, and second flowmeter 510 is responsible for the flow in monitoring outlet pipe 50, and by result
It is shown on liquid crystal display 602, the flow in outlet pipe 50 can be regulated and controled, relief valve 512 is protective device, if going out
Meeting releasing pressure automatically when air pressure in air pipe 50 reaches setting numerical value, to protect analytical equipment 40.
Analytical equipment 40 includes one or more of thermal analyzer, infrared spectrum analyser, gas chromatograph and mass spectrograph,
In, by control thermal analyzer software come trigger analytical equipment 40 run, by aerogenesis of the battery core in sealing test box 10 according to
Secondary importing analytical equipment 40 carries out infrared analysis (FTIR) and gas chromatography combined with mass spectrometry (GC-MS) test, to obtain battery core
The qualitative and quantitative data of real-time aerogenesis.
It please refers to Fig.1 to shown in Fig. 5, the operating method of battery core aerogenesis test system of the present invention is as follows：
1) soft pack cell is cut off into an osculum with ceramic scissors, when clip can only break outer packing, cannot destroy battery core.
2) battery core for cutting off osculum is placed in testing cassete cavity 106, from 114 extraction wire of positive and negative terminal and is led to
Crocodile clip is crossed to be clipped in respectively on the positive and negative anodes lug of battery core.
3) seal cover board 108 is fixed on by fixed clip 120 on the cover board geometrical clamp 110 of testing cassete cavity 106, is made
Battery core is in testing cassete cavity 106 and seal cover board 108 is formed by confined space.
4) the first solenoid valve 306 and second solenoid valve 506 are closed, third solenoid valve 516 is opened, opens vacuum pump 504
Air in sealing test box cavity 106 is extracted out by vacuum pump 504, is then shut off third solenoid valve 516 and vacuum by switch
Pump 504, observation vacuum meter 514 are read, if vacuum degree is unchanged in 10min, prove that the air-tightness of sealing test box 10 is good
It is good, it otherwise needs to reinstall seal cover board 108 and confirms air-tightness.
5) the first solenoid valve 306 is opened, helium, gas injection to sealing are injected into sealing test box 10 by air inlet 100
10 air pressure inside of testing cassete opens third solenoid valve 516 and vacuum pump 504, again after normal pressure, to close the first solenoid valve 306
It will be vacuumized inside sealing test box 10, then in triplicate to ensure the absolute inert atmosphere in 10 inside of sealing test box, most
After ensure solenoid valve Close All.
6) analytical equipment 40 and corresponding operating software are opened.
7) second solenoid valve 506 is opened, unscrews the metal threaded cap of standard gas intake valve 122, and take air tube to puncture using GC
The fluororubber pad of standard gas intake valve 122, toward sealing test box 10 inside inject 0.2mL standard gas, mark is tightened after gas injection
The metal threaded cap of gas intake valve 122, the standard gas of injection by gas outlet 102 pump to analytical equipment 40 carry out gas component and
Content analysis.
8) step 6) is repeated, the standard gas amount of injection is successively increased into 0.5mL, 1mL, 1.5mL, 2mL and 2.5mL, with this
Draw the standard curve (external standard method) of each gas component in GC-MS.
9) electrochemical workstation 70 is opened, the charging flow that overcharges or be melted into battery core is set, with overcharging degree not
Disconnected to increase, battery core starts aerogenesis, and the gas of output, which is continuously pumped through gas outlet 102 to analytical equipment 40, carries out aerogenesis analysis.It surveys
During examination, the three linked piece 508 on sealing test box 10 can completely cut off all electrolyte, and electrolyte is avoided to enter analytical equipment 40.
When battery core gas production is excessive, pressure in the timely removal box of 512 energy of relief valve ensures that security risk is not present in test process,
Meanwhile vacuum meter 514 and second flowmeter 510 can monitor vacuum and flow in box in real time, be conducive to operator's judgment experiment
The safety of state, double shield experiment carries out.
10) electrochemical workstation 70 is closed after testing, closes all solenoid valves, opens seal cover board 108, takes out electricity
Core is simultaneously scrapped in time.
11) test data for preserving analytical equipment 40, so as to the arrangement and analysis of next step.
In conjunction with the above detailed description of the present invention it is found that compared with the existing technology, battery core aerogenesis of the present invention tests system
With following advantageous effects：1) aerogenesis behavior of the battery core at each moment can be monitored in real time, and there is accurate measuring accuracy；
2) gas componant and content of battery core aerogenesis are detected using analytical equipment 40, realized to the qualitative of battery core aerogenesis and determined
Amount analysis；3) it ensure that battery core in inert atmosphere, avoids having an accident in the test of entire aerogenesis；4) it solves existing
Have and detect limit for height, the problem that error is big and consistency is poor in test method, battery core gas production mechanism can be analysed in depth, to optimize material
Material, electrolyte prescription, battery core production process, use condition etc. provide theories integration, and then improve battery core aerogenesis, and improving battery core makes
Use the service life.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula carries out change and modification appropriate.Therefore, the invention is not limited in specific implementation modes disclosed and described above, to this
Some modifications and changes of invention should also be as falling into the scope of the claims of the present invention.In addition, although this specification
In used some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (10)
1. a kind of battery core aerogenesis tests system, which is characterized in that including：
Sealing test box is equipped with air inlet and gas outlet for accommodating battery core；
Inert gas source is connect with air inlet by air inlet pipeline；And
Analytical equipment is connect with gas outlet by outlet pipe；
Wherein, outlet pipe is equipped with interface, and interface has vacuum pump by the first piping connection.
2. battery core aerogenesis according to claim 1 tests system, which is characterized in that the battery core aerogenesis tests system into one
Step is equipped with control cabinet, and the carrier gas from inert gas source enters the sealing test box by the air inlet pipeline through control cabinet, close
The gas for sealing testing cassete outflow enters the analytical equipment by the outlet pipe through control cabinet.
3. battery core aerogenesis according to claim 1 tests system, which is characterized in that the air inlet pipeline includes being connected with each other
Pressure maintaining valve, first flowmeter and the first solenoid valve.
4. battery core aerogenesis according to claim 1 tests system, which is characterized in that the outlet pipe includes being connected with each other
Second solenoid valve, three linked piece, second flowmeter and relief valve.
5. battery core aerogenesis according to claim 4 tests system, which is characterized in that the gas outlet and second solenoid valve it
Between be equipped with vacuum meter, third solenoid valve is equipped in first pipeline.
6. battery core aerogenesis according to claim 1 tests system, which is characterized in that the sealing test box includes fixed bottom
The seal cover board of seat, the testing cassete cavity and sealing test box cavity being positioned on firm banking.
7. battery core aerogenesis according to claim 6 tests system, which is characterized in that being equipped with above the testing cassete cavity can
Viewing window and binding post positioned at visual windows both sides, binding post inside and outside testing cassete cavity, draw positive and negative by back panel wiring column
Pole wiring is connect with battery core, and external cabling column draws positive and negative anodes wiring and is connected with electrochemical workstation.
8. battery core aerogenesis according to claim 6 tests system, which is characterized in that testing cassete cavity both sides are equipped with solid
Clamp, the seal cover board are equipped with fixed clip, and fixed clip fastens with geometrical clamp and is equipped with sealing ring at fastening.
9. battery core aerogenesis according to claim 6 tests system, which is characterized in that far from testing cassete on the seal cover board
One side-lower of cavity is equipped with standard gas intake valve.
10. battery core aerogenesis according to claim 1 tests system, which is characterized in that the analytical equipment includes heat analysis
One or more of instrument, infrared spectrum analyser, gas chromatograph and mass spectrograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710304889.6A CN108802276A (en) | 2017-05-03 | 2017-05-03 | Gas production test system for battery cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710304889.6A CN108802276A (en) | 2017-05-03 | 2017-05-03 | Gas production test system for battery cell |
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| CN108802276A true CN108802276A (en) | 2018-11-13 |
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ID=64054382
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| CN201710304889.6A Pending CN108802276A (en) | 2017-05-03 | 2017-05-03 | Gas production test system for battery cell |
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Cited By (5)
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| CN111562500A (en) * | 2020-05-22 | 2020-08-21 | 中国科学院长春应用化学研究所 | Battery test box and battery mass spectrum sampling system |
| 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 |
| CN112285193A (en) * | 2020-10-19 | 2021-01-29 | 中国科学院长春应用化学研究所 | Battery mass spectrum sampling system |
| CN112285194A (en) * | 2020-10-19 | 2021-01-29 | 中国科学院长春应用化学研究所 | Battery mass spectrum sampling system and battery testing device |
| CN113687231A (en) * | 2021-07-15 | 2021-11-23 | 中国科学院宁波材料技术与工程研究所 | Produce gas on-line analysis in laminate polymer battery and use device |
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| CN112285194A (en) * | 2020-10-19 | 2021-01-29 | 中国科学院长春应用化学研究所 | Battery mass spectrum sampling system and battery testing device |
| CN112285194B (en) * | 2020-10-19 | 2022-06-07 | 中国科学院长春应用化学研究所 | Battery mass spectrum sampling system and battery testing device |
| CN113687231A (en) * | 2021-07-15 | 2021-11-23 | 中国科学院宁波材料技术与工程研究所 | Produce gas on-line analysis in laminate polymer battery and use device |
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Application publication date: 20181113 |