CN106468644A - A kind of method of testing of lithium ion battery cell moisture - Google Patents
A kind of method of testing of lithium ion battery cell moisture Download PDFInfo
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- CN106468644A CN106468644A CN201510514602.3A CN201510514602A CN106468644A CN 106468644 A CN106468644 A CN 106468644A CN 201510514602 A CN201510514602 A CN 201510514602A CN 106468644 A CN106468644 A CN 106468644A
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Abstract
The present invention relates to a kind of method measuring lithium ion battery cell moisture, the method comprising the steps of：A ventilates：The high purity inert gas of low water content are passed into the inside lithium ion cell preparing；B samples：Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package, uniform one piece of lithium ion battery cell of clip apart；C tests：Weigh the weight of lithium ion battery cell in step B, and battery core is loaded in dry example boat, example boat is pushed in heating furnace, input battery core weight, start to test, instrument test will show the weight of moisture, the as water content of battery core after completing work., by testing to lithium ion battery cell moisture under specified temp and time conditions, operational approach is simple and convenient for the method, and required minute is short, and test result is closer to calculated value.
Description
Technical field
The present invention relates in technical field of lithium-ion battery moisture method of testing, especially a kind of
The method of testing of moisture in battery core.
Background technology
In the manufacturing process of battery, water as trace componentss a kind of in battery, to lithium ion battery SEI film
Formed and battery performance has a certain impact.Trace water can participate in the generation of SEI film, but moisture excessively can continue
Continuing is reacted with the lithium salts in electrolyte produces HF and LiF precipitation, and HF will destroy SEI film, and LiF sinks
Form sediment and consume active Li+, cause capacitance loss may produce gas simultaneously and cause battery flatulence etc. to reduce battery
Cycle performance.Therefore, it is necessary to the humidity of strictly controlled environment and battery in the manufacturing process of lithium ion battery
Battery core, the water content of electrolyte.Battery core manufacturing process is core link during lithium ion battery produces, battery core
Moisture is also an of paramount importance technical specification of battery quality management and control.Quickly and accurately test battery core moisture
Content is particularly important.
The method being now widely used in test battery battery core moisture：One kind is using karl Fischer moisture
Instrument tests battery core internal positive pole piece moisture, cathode pole piece moisture and barrier film moisture respectively,
And the moisture of battery core is calculated by formula；
Battery core moisture computing formula：
Battery core moisture=(anode pole piece moisture * anode pole piece gross mass+cathode pole piece moisture * cathode pole piece
Gross mass+barrier film moisture * barrier film gross mass)/battery core gross mass
Another kind of method is first to inject a certain amount of organic solvent in inside battery, by using organic solvent extraction
Take out the moisture of battery core, after extracting 3 days, the water content of test extract, and become by formula scales
The moisture of battery battery core.
Organic solvent extractionprocess tests battery core moisture computing formula：
Battery core moisture=[(battery quality+organic solvent reservoir quantity) * tests moisture value-organic solvent fluid injection
Amount * organic solvent moisture value]/battery quality
For above-mentioned shown method of testing although being widely used, but respectively there is weak point.In method one first
The moisture of test positive and negative electrode and barrier film respectively, then carry out Theoretical Calculation although test result is closed the most
Reason, but test process is relatively complicated；First battery core must be extracted more than 3 days with organic solvent in method two,
The test required time cycle is longer, and test result is generally less than calculated value, and same batch battery is surveyed
Test result concordance is poor.
Therefore, a kind of method of testing that test is quick, result is accurate and easy and simple to handle of exploitation, has very heavy
The production practices meaning wanted.
Content of the invention
In order to overcome the shortcomings of current assay method, the present invention provides a kind of mensure lithium ion battery cell moisture
The method of content.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of method measuring lithium ion battery cell moisture, the method comprises the following steps：
A. ventilate：Under the conditions of normal atmospheric conditions, the high purity inert gas of low water content are passed into
The inside lithium ion cell preparing；
B. sample：Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart,
And uniform one piece of lithium ion battery cell of clip；
C. test：Weigh the weight of lithium ion battery cell in step B, and battery core is loaded example boat
Interior, example boat is pushed in heating furnace, inputs battery core weight, start to test, after instrument test completes work
Moisture, the as water content of battery core will be shown.
According to the method for testing of lithium ion battery cell moisture of the present invention, noble gases in described step A
Water content be less than 30ppm, preferably shorter than 15ppm, most preferably less than 5ppm.
In described step A, the purity of noble gases is higher than 99%, preferably above 99.9%, most preferably higher than
99.99%.
In described step A, noble gases are any one in nitrogen, argon, helium.
In described step B, battery core includes anode pole piece, cathode pole piece and the barrier film being located between positive and negative plate,
And other battery core constituent, the battery core part of uniform clip includes an anode pole piece, a negative pole pole
Piece and be comparable size between positive and negative plate barrier film.
In described step B, the weight of clip battery core is 0.2～0.8g, preferably 0.3～0.5g.
Heating furnace in described step C is heating furnace commonly used in the art, preferably uses karl Fischer moisture
The heating furnace part of instrument.The instrument of wherein test moisture is karl Fischer Moisture Meter.
In described step C, the test temperature of solid moisture tester is 80 DEG C～250 DEG C, preferably 120 DEG C
～180 DEG C, most preferably 140 DEG C～160 DEG C.
In described step C, the testing time of solid moisture tester is 5min～25min, preferably 8min～20
Min, most preferably 10min～16min.
The load volume that in described step C, heating furnace is passed through is 20～100ccm, preferably 40～60ccm.
The method have the advantages that：
The method of testing of above-mentioned lithium ion battery cell moisture, using a kind of more general karl Fischer
Moisture Meter solid moisture measurement, operational approach is simple and convenient, and required minute is short, and tests knot
Fruit is closer to calculated value.
Specific embodiment
Hereinafter in order to make it easier to understand that the present invention, the present invention be described in detail.
It should be understood that the vocabulary being used in the specification and claims and term should not be construed as everyday words
Implication defined in allusion quotation.It should also be understood that described vocabulary and term should can suitable defined terms based on inventor
The implication of remittance and term is construed to the technology design phase one having with the present invention with the principle of the best interpretations present invention
The implication causing.
A kind of method measuring lithium ion battery cell moisture, the method are provided in technical solution of the present invention
Comprise the following steps：
A. ventilate：Under the conditions of normal atmospheric conditions, the high purity inert gas of low water content are passed into
The inside lithium ion cell preparing；
B. sample：Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart,
And uniform one piece of lithium ion battery cell of clip；
C. test：Weigh the weight of lithium ion battery cell in step B, and battery core is loaded drying
In example boat, example boat is advanced in heating furnace, inputs battery core weight, start to test, instrument test completes
By the weight of display moisture, the as water content of battery core after work.
Described lithium ion battery cell includes anode pole piece, cathode pole piece and the barrier film between positive and negative plate,
And other battery core constituent.Described anode pole piece is LiFePO4, LiMn2O4, nickle cobalt lithium manganate or cobalt
One of sour lithium；Described cathode pole piece is graphite；Described barrier film be monolayer PE, monolayer PP, three layers
One of PP/PE/PP composite membrane or inorganic ceramic barrier film；Described other battery core constituent include Copper Foil,
Aluminium foil, anode ear, negative electrode lug and adhesive tape.
In a preferred embodiment of the invention, in described step A, the water content of noble gases is less than
30ppm, preferably shorter than 15ppm, most preferably less than 5ppm.
In a preferred embodiment of the invention, in described step A, the purity of noble gases is higher than 99%,
Preferably above 99.9%, most preferably higher than 99.99%.
In a preferred embodiment of the invention, in described step A, noble gases are selected from nitrogen, argon
Any one in gas, helium.
In the present invention, originally described inside lithium ion cell is vacuum state, and being passed through above-mentioned noble gases can
Prevent the moisture in the quick absorption air of battery core when taking lithium ion battery outer package apart, described be passed through with ability
Known to field technique personnel, mode is carried out.
In a preferred embodiment of the invention, the clip in described step B is with ordinary skill
Known to personnel, mode is implemented, it is preferred to use shears clip.Preferably, described shears exist before the use
High-temperature baking 3～6h in 80～150 DEG C of baking oven.
In a preferred embodiment of the invention, in described step B, the battery core part of uniform clip includes
One anode pole piece, a cathode pole piece and the barrier film between positive and negative plate.
In a preferred embodiment of the invention, in described step B, the weight of clip battery core is
0.2～0.8g, preferably 0.3～0.5g.
In a preferred embodiment of the invention, in described step C with those of ordinary skill in the art
Example boat is advanced in heating furnace by the mode known, it is preferred to use tweezers advance example boat in heating furnace.Preferably
Ground, described tweezers are made up of metal (as ferrum, copper, steel etc.).Additionally, described tweezers are excellent before the use
It is selected in high-temperature baking 3～6h in 80 DEG C～150 DEG C of baking oven.
In a preferred embodiment of the invention, the heating furnace in described step C is commonly used in the art
Heating furnace, preferably uses the heating furnace part of karl Fischer Moisture Meter.Moisture tester is preferably karr
Take not Moisture Meter.
In a preferred embodiment of the invention, in described step C solid moisture tester test temperature
Spend for 80 DEG C～250 DEG C, preferably 120 DEG C～180 DEG C, most preferably 140 DEG C～160 DEG C.
In a preferred embodiment of the invention, in described step C during the test of solid moisture tester
Between be 5min～25min, preferably 10min～15min, most preferably 12min～16min.
In a preferred embodiment of the invention, the load volume that in described step C, heating furnace is passed through is
20～100ccm, preferably 50～60ccm.
Hereinafter, the present invention will be described in detail by specific embodiment.However, the present invention can give different
Form and should not be interpreted as limited to embodiment presented herein.And these exemplary embodiment party
To those skilled in the art, case is in order to fully explain that the present invention provides.
If no special instructions, temperature used in the present invention is room temperature, and the pressure being used is normal pressure/atmospheric pressure
Power.
Heating furnace employed in the present invention is purchased from METTLER TOLEDO model C20 and DO308
Karl Fischer Moisture Meter heating furnace.
Embodiment one
Under the conditions of normal atmospheric conditions, the high pure nitrogen gas that water content is less than 5ppm is passed into and prepares
Inside lithium ion cell, wherein anode be nickle cobalt lithium manganate pole piece, negative pole be graphite pole piece, barrier film
For monolayer PP barrier film.Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart,
And with shears uniform clip one piece lithium ion battery cell is dried.Weigh the battery core of 0.35g, and battery core is filled
Enter in dry example boat, advanced example boat in heating furnace with tweezers are dried, input battery core weight, start
Test, battery core moisture measurement temperature is 150 DEG C, and the testing time is 12min, and load volume is 50～60ccm,
Instrument test will show the weight of moisture after completing work, and the as water content of battery core, is 321.2ppm.
Embodiment two
Under the conditions of normal atmospheric conditions, the high-purity helium gas that water content is less than 5ppm is passed into and prepares
Inside lithium ion cell, wherein anode be nickle cobalt lithium manganate pole piece, negative pole be graphite pole piece, barrier film
For monolayer PP barrier film.Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart,
And with shears uniform clip one piece lithium ion battery cell is dried.Weigh the battery core of 0.5g, and battery core is loaded
In the example boat being dried, with tweezers are dried, example boat is pushed in heating furnace, inputs battery core weight, start
Test, battery core moisture measurement temperature is 200 DEG C, and the testing time is 12min, and load volume is 50～60ccm,
Instrument test will show the weight of moisture after completing work, and the as water content of battery core, is 1012.8ppm.
Embodiment three
Under the conditions of normal atmospheric conditions, the high pure nitrogen gas that water content is less than 5ppm is passed into and prepares
Inside lithium ion cell, wherein anode be nickle cobalt lithium manganate pole piece, negative pole be graphite pole piece, barrier film
For monolayer PP barrier film.Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart,
And with shears uniform clip one piece lithium ion battery cell is dried.Weigh the battery core of 0.3g, and battery core is loaded
In the example boat being dried, with tweezers are dried, example boat is pushed in heating furnace, inputs battery core weight, start
Test, battery core moisture measurement temperature is 120 DEG C, and the testing time is 12min, and load volume is 50～60ccm,
Instrument test will show the weight of moisture after completing work, and the as water content of battery core, is 226.3ppm.
Example IV
Under the conditions of normal atmospheric conditions, the high purity inert gas that water content is less than 5ppm are passed into and prepare
Inside lithium ion cell, wherein anode be nickle cobalt lithium manganate pole piece, negative pole be graphite pole piece, barrier film
For monolayer PP barrier film.Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart,
And with shears uniform clip one piece lithium ion battery cell is dried.Weigh the battery core of 0.3g, and battery core is loaded
In the example boat being dried, with tweezers are dried, example boat is pushed in heating furnace, inputs battery core weight, start
Test, battery core moisture measurement temperature is 150 DEG C, and the testing time is 8min, and load volume is 50～60ccm, instrument
Device test will show the weight of moisture after completing work, and the as water content of battery core, is 278.6ppm.
Embodiment five
Under the conditions of normal atmospheric conditions, the high purity inert gas that water content is less than 5ppm are passed into and prepare
Inside lithium ion cell, wherein anode be nickle cobalt lithium manganate pole piece, negative pole be graphite pole piece, barrier film
For monolayer PP barrier film.Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart,
And with shears uniform clip one piece lithium ion battery cell is dried.Weigh the battery core of 0.4g, and battery core is loaded
In the example boat being dried, with tweezers are dried, example boat is pushed in heating furnace, inputs battery core weight, start
Test, battery core moisture measurement temperature is 150 DEG C, and the testing time is 16min, and load volume is 50～60ccm,
Instrument test will show the weight of moisture after completing work, and the as water content of battery core, is 584.6ppm.
Embodiment six
Under the conditions of normal atmospheric conditions, the high purity inert gas that water content is less than 5ppm are passed into and prepare
Inside lithium ion cell, wherein anode is mangaic acid pole piece, and negative pole is graphite pole piece, and barrier film is single
Layer PE barrier film.Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart, and
With shears uniform clip one piece lithium ion battery cell is dried.Weigh the battery core of 0.4g, and battery core is loaded dry
In dry example boat, with tweezers are dried, example boat is pushed in heating furnace, inputs battery core weight, start to survey
Examination, battery core moisture measurement temperature is 140 DEG C, and the testing time is 12min, and load volume is 50～60ccm, instrument
Device test will show the weight of moisture after completing work, and the as water content of battery core, is 282.7ppm.
Embodiment seven
Under the conditions of normal atmospheric conditions, the high purity inert gas that water content is less than 5ppm are passed into and prepare
Inside lithium ion cell, wherein anode is LiFePO4 pole piece, and negative pole is graphite pole piece, and barrier film is
Inorganic ceramic barrier film.Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart,
And with shears uniform clip one piece lithium ion battery cell is dried.Weigh the battery core of 0.4g, and battery core is loaded
In the example boat being dried, with tweezers are dried, example boat is pushed in heating furnace, inputs battery core weight, start
Test, battery core moisture measurement temperature is 160 DEG C, and the testing time is 16min, and load volume is 50～60ccm,
Instrument test will show the weight of moisture after completing work, and the as water content of battery core, is 454.9ppm.
Comparative example one
Under the conditions of normal atmospheric conditions, the high pure nitrogen gas that water content is less than 5ppm is passed into and prepares
Inside lithium ion cell, wherein anode be nickle cobalt lithium manganate pole piece, negative pole be graphite pole piece, barrier film
For monolayer PP barrier film.Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart,
And with shears uniform clip anode slice of lithium ion battery, cathode pole piece and barrier film are dried, weigh respectively
The anode pole piece of 0.3～0.5g, cathode pole piece and barrier film, anode pole piece, cathode pole piece and diaphragm seal are dried
Preserve, first load anode pole piece in dry example boat, with tweezers are dried, example boat is pushed into heating furnace
Interior, input anode pole piece weight, start to test, anode pole piece moisture measurement temperature is 245 DEG C, the testing time
For 10min, load volume is 50～60ccm, and instrument test will show the weight of moisture, as after completing work
The water content of anode pole piece；Further take out cathode pole piece, cathode pole piece is loaded in dry example boat, with doing
Example boat is pushed in heating furnace dry tweezers, inputs cathode pole piece weight, starts to test, cathode pole piece water
Test temperature is divided to be 220 DEG C, the testing time is 8min, load volume is 50～60ccm, instrument test completes
By the weight of display moisture, the as water content of cathode pole piece after work；Finally take out barrier film, barrier film is filled
Enter in dry example boat, with tweezers are dried, example boat is pushed in heating furnace, input barrier film weight, open
Begin to test, barrier film moisture measurement temperature is 120 DEG C, the testing time is 8min, load volume is 50～60ccm,
Instrument test will show the weight of moisture, the as water content of barrier film after completing work.Contained by battery core moisture
Amount formula calculates moisture=(the anode pole piece moisture * anode pole piece gross mass+cathode pole piece moisture * of battery core
Cathode pole piece gross mass+barrier film moisture * barrier film gross mass)/battery core gross mass, obtain theoretical value 323.9ppm.
Comparative example two
Under conditions of room temperature, relative humidity are less than 2%, choose identical with embodiment one to five and comparative example one
Battery, inject a certain amount of DMC solvent in inside battery, by the battery standing 3 days of injection DMC,
Period carries out turn-over to battery, through DMC solvent extraction inside battery battery core moisture, after extraction, takes out
Take in extract injection karl Fischer Moisture Meter, input extract weight, start to test, instrument test is complete
The weight of moisture, the as water content of extract will be shown after becoming work.Become battery battery core by formula scales
Moisture=[(battery quality+DMC reservoir quantity) * test moisture value-DMC reservoir quantity * DMC moisture
Value]/battery quality.
Comparative example three
Under the conditions of normal atmospheric conditions, the high pure nitrogen gas that water content is less than 5ppm is passed into and prepares
Inside lithium ion cell, wherein anode is mangaic acid pole piece, and negative pole is graphite pole piece, and barrier film is single
Layer PE barrier film.Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart, and
With shears uniform clip anode slice of lithium ion battery, cathode pole piece and barrier film are dried, weigh 0.3～0.5g respectively
Anode pole piece, cathode pole piece and barrier film, by anode pole piece, cathode pole piece and diaphragm seal kept dry,
First anode pole piece is loaded in dry example boat, with tweezers are dried, example boat is pushed in heating furnace, defeated
Enter anode pole piece weight, start to test, anode pole piece moisture measurement temperature is 245 DEG C, the testing time is 10
Min, load volume is 50～60ccm, and instrument test will show the weight of moisture, as positive pole after completing work
The water content of pole piece；Further take out cathode pole piece, cathode pole piece is loaded in dry example boat, with tweezer is dried
Example boat is pushed in heating furnace, inputs cathode pole piece weight, starts to test, cathode pole piece moisture is surveyed
Examination temperature is 220 DEG C, and the testing time is 8min, and load volume is 50～60ccm, and instrument test completes work
Afterwards by the weight of display moisture, the as water content of cathode pole piece；Finally take out barrier film, barrier film is loaded dry
In dry example boat, with tweezers are dried, example boat is pushed in heating furnace, inputs barrier film weight, start to survey
Examination, barrier film moisture measurement temperature is 120 DEG C, and the testing time is 8min, and load volume is 50～60ccm, instrument
Device test will show the weight of moisture, the as water content of barrier film after completing work.By battery core moisture
Formula calculate battery core moisture=(anode pole piece moisture * anode pole piece gross mass+cathode pole piece moisture * bear
Pole pole piece gross mass+barrier film moisture * barrier film gross mass)/battery core gross mass, obtain theoretical value 285.9ppm.
Comparative example four
Under the conditions of normal atmospheric conditions, the high-purity helium gas that water content is less than 5ppm is passed into and prepares
Inside lithium ion cell, wherein anode is LiFePO4 pole piece, and negative pole is graphite pole piece, and barrier film is
Inorganic ceramic barrier film.Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart,
And with shears uniform clip anode slice of lithium ion battery, cathode pole piece and barrier film are dried, weigh respectively
The anode pole piece of 0.3～0.5g, cathode pole piece and barrier film, anode pole piece, cathode pole piece and diaphragm seal are dried
Preserve, first load anode pole piece in dry example boat, with tweezers are dried, example boat is pushed into heating furnace
Interior, input anode pole piece weight, start to test, anode pole piece moisture measurement temperature is 245 DEG C, the testing time
For 10min, load volume is 50～60ccm, and instrument test will show the weight of moisture, as after completing work
The water content of anode pole piece；Further take out cathode pole piece, cathode pole piece is loaded in dry example boat, with doing
Example boat is pushed in heating furnace dry tweezers, inputs cathode pole piece weight, starts to test, cathode pole piece water
Test temperature is divided to be 220 DEG C, the testing time is 8min, load volume is 50～60ccm, instrument test completes
By the weight of display moisture, the as water content of cathode pole piece after work；Finally take out barrier film, barrier film is filled
Enter in dry example boat, with tweezers are dried, example boat is pushed in heating furnace, input barrier film weight, open
Begin to test, barrier film moisture measurement temperature is 120 DEG C, the testing time is 8min, load volume is 50～60ccm,
Instrument test will show the weight of moisture, the as water content of barrier film after completing work.Contained by battery core moisture
Amount formula calculates moisture=(the anode pole piece moisture * anode pole piece gross mass+cathode pole piece moisture * of battery core
Cathode pole piece gross mass+barrier film moisture * barrier film gross mass)/battery core gross mass, obtain theoretical value 451.2ppm.
Table 1
By the part test result data taken passages in table 1 it is clear that utilizing test side of the present invention
Method, by testing to lithium ion battery cell moisture under specified temp and time conditions, its survey
Test result is close to calculated value in comparative example, and operational approach is simple and convenient, and required minute is short.
The above is only the preferred embodiment of the present invention it is noted that common for the art
For technical staff, under the premise without departing from the principles of the invention, some improvements and modifications can also be made,
These improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of method measuring lithium ion battery cell moisture is it is characterised in that the method comprises the following steps：
A. ventilate：Under Atmospheric Condition, the high purity inert gas of low water content are passed into be determined
Inside lithium ion cell；
B. sample：Under conditions of room temperature, relative humidity are less than 2%, take lithium ion battery outer package apart, and
Uniformly one piece of lithium ion battery cell of clip；
C. test：Weigh the weight of lithium ion battery cell in step B, and battery core is loaded dry sample
In boat, example boat is pushed in heating furnace, input battery core weight, test moisture, as battery core
Water content.
2. method according to claim 1 it is characterised in that in described step A noble gases water content
Less than 30ppm, preferably shorter than 15ppm, most preferably less than 5ppm.
3. method according to claim 1 it is characterised in that in described step A the purity of noble gases high
In 99%, preferably above 99.9%, most preferably higher than 99.99%.
4. method according to claim 1 it is characterised in that in described step A noble gases be selected from nitrogen
Any one in gas, argon, helium.
5. method according to claim 1 it is characterised in that in described step B battery core include anode pole piece,
Cathode pole piece and the barrier film being located between positive and negative plate, and other battery core constituent, the electricity of uniform clip
Core segment include an anode pole piece, a cathode pole piece and be located at positive and negative plate between comparable size every
Film.
6. method according to claim 1 it is characterised in that in described step B the weight of clip battery core be
0.2～0.8g, preferably 0.3～0.5g.
7. method according to claim 1 is it is characterised in that the heating furnace in described step C is preferably and blocks
The heating furnace part of Er Feixiu Moisture Meter.
8. method according to claim 1 is it is characterised in that solid moisture tester in described step C
Test temperature is 80 DEG C～250 DEG C, preferably 120 DEG C～180 DEG C, most preferably 140 DEG C～160 DEG C.
9. method according to claim 1 is it is characterised in that solid moisture tester in described step C
Testing time is 5min～25min, preferably 8min～20min, most preferably 10min～16min.
10. according to claim 1 method it is characterised in that carrier gas that in described step C, heating furnace is passed through
Measure as 20～100ccm, preferably 40～60ccm.
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| CN108627612A (en) * | 2018-05-09 | 2018-10-09 | 合肥国轩高科动力能源有限公司 | It is a kind of quickly to measure ternary material humidity sensitive device |
| CN109346674A (en) * | 2018-09-19 | 2019-02-15 | 惠州亿纬锂能股份有限公司 | A kind of battery pole piece baking method |
| CN109708990A (en) * | 2018-11-23 | 2019-05-03 | 中国电子技术标准化研究院 | The measuring method of trace moisture content in a kind of electrode material for lithium ion cell |
| CN109916963A (en) * | 2019-04-24 | 2019-06-21 | 东莞维科电池有限公司 | The test method of water content in a kind of slurry |
| CN110514724A (en) * | 2019-08-22 | 2019-11-29 | 中车青岛四方车辆研究所有限公司 | The detection method of micro-water content in a kind of Soft Roll lithium-ion capacitance battery core |
| CN111579711A (en) * | 2020-04-24 | 2020-08-25 | 江苏中兴派能电池有限公司 | Method for evaluating water content of baked lithium ion battery |
| CN113640688A (en) * | 2021-08-06 | 2021-11-12 | 合肥国轩高科动力能源有限公司 | Method for determining moisture test temperature of lithium ion battery positive plate |
| CN114674959A (en) * | 2022-03-29 | 2022-06-28 | 佛山市天劲新能源科技有限公司 | Method and device for online detection of battery core moisture in lithium battery oven |
| CN115615181A (en) * | 2022-09-30 | 2023-01-17 | 广东利元亨智能装备股份有限公司 | Moisture detection method and baking device |
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| CN108627612A (en) * | 2018-05-09 | 2018-10-09 | 合肥国轩高科动力能源有限公司 | It is a kind of quickly to measure ternary material humidity sensitive device |
| CN109346674A (en) * | 2018-09-19 | 2019-02-15 | 惠州亿纬锂能股份有限公司 | A kind of battery pole piece baking method |
| CN109708990A (en) * | 2018-11-23 | 2019-05-03 | 中国电子技术标准化研究院 | The measuring method of trace moisture content in a kind of electrode material for lithium ion cell |
| CN109708990B (en) * | 2018-11-23 | 2021-08-13 | 中国电子技术标准化研究院 | Method for measuring content of trace moisture in electrode material for lithium ion battery |
| CN109916963A (en) * | 2019-04-24 | 2019-06-21 | 东莞维科电池有限公司 | The test method of water content in a kind of slurry |
| CN110514724A (en) * | 2019-08-22 | 2019-11-29 | 中车青岛四方车辆研究所有限公司 | The detection method of micro-water content in a kind of Soft Roll lithium-ion capacitance battery core |
| CN111579711A (en) * | 2020-04-24 | 2020-08-25 | 江苏中兴派能电池有限公司 | Method for evaluating water content of baked lithium ion battery |
| CN113640688A (en) * | 2021-08-06 | 2021-11-12 | 合肥国轩高科动力能源有限公司 | Method for determining moisture test temperature of lithium ion battery positive plate |
| CN114674959A (en) * | 2022-03-29 | 2022-06-28 | 佛山市天劲新能源科技有限公司 | Method and device for online detection of battery core moisture in lithium battery oven |
| CN115615181A (en) * | 2022-09-30 | 2023-01-17 | 广东利元亨智能装备股份有限公司 | Moisture detection method and baking device |
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