CN106291377A - A kind of detection method of lithium ion battery absorbent - Google Patents
A kind of detection method of lithium ion battery absorbent Download PDFInfo
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- CN106291377A CN106291377A CN201610620327.8A CN201610620327A CN106291377A CN 106291377 A CN106291377 A CN 106291377A CN 201610620327 A CN201610620327 A CN 201610620327A CN 106291377 A CN106291377 A CN 106291377A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
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Abstract
The invention discloses the detection method of a kind of lithium ion battery absorbent, including step: the first step: object to be detected to be weighed in the balance weight, and record the described object to be detected qualitative data before imbibition, and then soaking in the electrolytic solution, described electrolyte fills in a vessel；Second step: described container is positioned in a vacuum drying oven；3rd step: vacuum drying oven is carried out heating evacuation so that the temperature of vacuum drying oven and vacuum respectively reach preset temperature data interval and predetermined vacuum degree numerical intervals；4th step: after described object to be detected is placed on reaching predetermined time period in the electrolyte in described vacuum drying oven, the liquid absorption of described object to be detected is detected.The present invention can effectively shorten the detection time to vitals such as positive plate, negative plate and barrier films in lithium ion battery, improves detection efficiency, ensures the accuracy to the detection of lithium ion battery absorbent simultaneously.
Description
Technical field
The present invention relates to cell art, particularly relate to the detection method of a kind of lithium ion battery absorbent.
Background technology
Lithium ion battery have high working voltage, high-energy-density, have extended cycle life, the advantage such as non-environmental-pollution, as energy
The secondary chemical sources of electric energy that electric energy and chemical energy are mutually converted, one of hot-candidate technology being considered electric energy storing system.From
Since birth, its application constantly expands, it is thus achieved that develop rapidly.At present, not only at portable communication apparatus and portable
It is used widely on electronic equipment, and it is large-scale to be widely used in electric tool, electric bicycle and electric automobile etc.
Electrical equipment aspect.
At present, along with increasingly sharpening of environmental pollution, the thing followed is the pass that people's new forms of energy industry size metaplasia is produced
Note.Therefore lithium ion battery industry rises, and positive plate, negative plate, barrier film are as the important component part of lithium ion battery,
The quality of its absorbent (i.e. the performance of Electolyte-absorptive) will directly influence the performance of lithium ion battery.For now,
The detection of lithium ion battery absorbent is mainly placed in the electrolytic solution, soaks for a long time, not only detection time length,
Detection efficiency is low, and has had a strong impact on the development progress of lithium ion battery.But, there is presently no a kind of method, Ke Yiyou
Effect shortens the detection time to vitals such as positive plate, negative plate and barrier films in lithium ion battery.
Therefore, at present in the urgent need to developing a kind of method, it can effectively shorten positive plate in lithium ion battery, negative
The detection time of the vitals such as pole piece and barrier film, improve detection efficiency, and ensure lithium ion battery absorbent simultaneously
The accuracy of detection, it is possible to significantly improve the production efficiency of lithium ion battery.
Summary of the invention
In view of this, it is an object of the invention to provide the detection method of a kind of lithium ion battery absorbent, it can have
Effect shortens the detection time to vitals such as positive plate, negative plate and barrier films in lithium ion battery, improves detection efficiency, and
Ensure the accuracy to the detection of lithium ion battery absorbent, it is possible to significantly improve the production efficiency of lithium ion battery, have simultaneously
It is beneficial to improve the market application foreground of cell production companies product, is of great practical significance.
To this end, the invention provides the detection method of a kind of lithium ion battery absorbent, comprise the following steps:
The first step: object to be detected is weighed in the balance weight, and records the described object to be detected qualitative data before imbibition,
Then being soaked in the electrolytic solution by described object to be detected, described electrolyte fills in a vessel；
Second step: described container is positioned in a vacuum drying oven；
3rd step: described vacuum drying oven is carried out heating evacuation so that the temperature of described vacuum drying oven is with true
Reciprocal of duty cycle respectively reaches preset temperature data interval and predetermined vacuum degree numerical intervals；
4th step: reach Preset Time being placed in the electrolyte in described vacuum drying oven by described object to be detected
After length, the liquid absorption of described object to be detected is detected.
Wherein, in the first step, have described object to be detected and include at least one in positive plate, negative plate and barrier film.
Wherein, the active material of described positive plate includes LiFePO4 LiFePO4, LiMn2O4 LiMn2O2, nickel cobalt manganese
Acid lithium LiNixCoyMnzO2With nickel cobalt aluminum lithium LiNixCoyAlzO2In at least one, wherein, 0 ＜ x, y, z ＜ 1, x+y+z=1.
Wherein, during the active material of described cathode pole piece includes graphite, MCMB, hard carbon and soft carbon extremely
Few one.
Wherein, described barrier film is the monofilm using polyethylene or polypropylene material to make, or for use polyethylene and
The multilayer film that polypropylene material is made.
Wherein, described barrier film is the barrier film with ceramic coating.
Wherein, described ceramic coating is by using aluminium oxide Al 2O3 and/or Kynoar PVDF to smear formed painting
Layer.
Wherein, in the first step, described container is an open-topped glass.
Wherein, in the third step, described preset temperature data interval is 40 DEG C～80 DEG C, described predetermined vacuum number of degrees value district
Between be-50Mpa～-90Mpa.
Wherein, in the 4th step, having described predetermined time period is 1min～100min；
That detects the liquid absorption of described object to be detected concretely comprises the following steps:
Take out the object described to be detected after imbibition, when its surface does not has free electrolyte, with balance to imbibition after
Described object to be detected weighs, and after deducting the described object to be detected qualitative data before imbibition, finally gives described
The liquid absorption of object to be detected.
The technical scheme provided from the above present invention, compared with prior art, the invention provides a kind of lithium from
The detection method of sub-battery absorbent, it can effectively shorten weights such as positive plate, negative plate and barrier films in lithium ion battery
Want the detection time of parts, improve detection efficiency, and ensure the accuracy to the detection of lithium ion battery absorbent, energy simultaneously
Enough significantly improve the production efficiency of lithium ion battery, be conducive to improving the market application foreground of cell production companies product, have
Great production practices meaning.
Accompanying drawing explanation
The flow chart of the detection method of a kind of lithium ion battery absorbent that Fig. 1 provides for the present invention；
The detection method of the Fig. 2 a kind of lithium ion battery absorbent for providing based on the present invention, a specific embodiment
The simplified schematic diagram of the detection device used；
Fig. 3 is in specific embodiment, and the first Battery pack pole group uses existing battery absorbent detection method and second
After the detection method that Battery pack pole group uses the present invention to provide detects respectively, the first Battery pack pole group and the second Battery pack pole
The contrast signal table figure of group liquid absorption；
In figure, 1 is container, and 2 is electrolyte, and 3 is object to be detected.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawings with embodiment to this
Invention is described in further detail.
The flow chart of the detection method of a kind of lithium ion battery absorbent that Fig. 1 provides for the present invention.
See Fig. 1, Fig. 2, the invention provides the detection method of a kind of lithium ion battery absorbent, for lithium ion
In battery, the vitals such as positive plate, negative plate and barrier film carries out absorbent detection, it is possible to ensure lithium ion battery imbibition
The accuracy of performance detection.The method specifically includes following steps:
The first step: object 3 to be detected is weighed in the balance weight, and records the described object to be detected mass number before imbibition
According to, then described object 3 to be detected being immersed in electrolyte 2, described electrolyte 2 is contained in a container 1；
Second step: described container 1 is positioned in a vacuum drying oven；
3rd step: described vacuum drying oven is carried out heating evacuation so that the temperature of described vacuum drying oven is with true
Reciprocal of duty cycle respectively reaches preset temperature data interval and predetermined vacuum degree numerical intervals；
4th step: reach Preset Time being placed in the electrolyte in described vacuum drying oven by described object to be detected
After length, the liquid absorption (being absorbent) of described object to be detected is detected.
In the 4th step, the concrete steps that the liquid absorption (being absorbent) of described object to be detected is detected
For: take out the object described to be detected after imbibition, when its surface does not has free electrolyte, treat described in after imbibition with balance
Detection object weigh, and deduct the described first step weigh obtain mass figures (the most described object to be detected is before imbibition
Qualitative data) after, finally give the liquid absorption of described object to be detected.
In the present invention, in the first step, implementing, described object to be detected can include positive plate, negative plate
With at least one in barrier film.
In the present invention, in the first step, implementing, described container can be an open-topped glass.
In the present invention, in second step, implementing, described vacuum drying oven is for fully sealing.
In the present invention, in the third step, implementing, described preset temperature data interval is preferably 40 DEG C～80
DEG C, described predetermined vacuum degree numerical intervals is preferably-50Mpa～-90Mpa (MPa) atmospheric pressure.
In the present invention, in the 4th step, implementing, described predetermined time period can be 1min～100min
(minute).
In the present invention, when described object to be detected includes positive plate, the active material of described positive plate includes
LiFePO4 LiFePO4, LiMn2O4 LiMn2O2, nickle cobalt lithium manganate LiNixCoyMnzO2With nickel cobalt cobalt lithium LiNixCoyAlzO2In
At least one, wherein, 0 ＜ x, y, z ＜ 1, x+y+z=1.
In the present invention, when described object to be detected includes negative plate, the active material bag of described cathode pole piece
Include at least one in graphite, MCMB, hard carbon and soft carbon；
In the present invention, when described object to be detected includes barrier film, described barrier film can be to use polyethylene or poly-third
The monofilm that alkene material is made, or the multilayer film made for employing polyethylene and polypropylene material.Implement, described every
Film can be the barrier film with ceramic coating.Described ceramic coating is coated with for using aluminium oxide Al 2O3 and/or Kynoar PVDF
Smear formed coating.
Below in conjunction with specific embodiment, the technique effect of the technical scheme that the present invention provides is described.
Embodiment: will be divided into two groups with a collection of six battery pole groups, often group is respectively provided with three LITHIUM BATTERY groups, first group of electricity
Pole, pond group is without evacuation in dry environment and heating, but is placed directly within electrolyte infiltration 6h (hour), measures the
The absorbent of one Battery pack pole group；Second Battery pack pole group is positioned under the vacuum environment of-60Mpa, is simultaneously held in 50 DEG C
Temperature conditions under 10min, then measure the absorbent of the second Battery pack pole group.First Battery pack pole group and the second Battery pack
Pole group liquid absorption, test result is as shown in Figure 3.As seen from Figure 3, heating and under vacuum environment, LITHIUM BATTERY group
Can suction electrolyte quickly, so can significantly shorten the time of repose after lithium ion battery liquid injection, thus improve right
The detection efficiency of lithium ion battery absorbent, and then improve the production efficiency of lithium ion battery.Equally, the inspection that the present invention provides
Survey method is also applied for simple barrier film, anode pole piece or cathode pole piece.
In sum, compared with prior art, the detection side of a kind of lithium ion battery absorbent that the present invention provides
Method, it can effectively shorten the detection time to vitals such as positive plate, negative plate and barrier films in lithium ion battery, improve inspection
Survey efficiency, and ensure the accuracy to the detection of lithium ion battery absorbent simultaneously, it is possible to significantly improve lithium ion battery
Production efficiency, is conducive to improving the market application foreground of cell production companies product, is of great practical significance.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. the detection method of a lithium ion battery absorbent, it is characterised in that comprise the following steps:
The first step: object to be detected is weighed in the balance weight, and records the described object to be detected qualitative data before imbibition, then
Being soaked in the electrolytic solution by described object to be detected, described electrolyte fills in a vessel；
Second step: described container is positioned in a vacuum drying oven；
3rd step: described vacuum drying oven is carried out heating evacuation so that the temperature of described vacuum drying oven and vacuum
Respectively reach preset temperature data interval and predetermined vacuum degree numerical intervals；
4th step: reach predetermined time period being placed in the electrolyte in described vacuum drying oven by described object to be detected
After, the liquid absorption of described object to be detected is detected.
2. detection method as claimed in claim 1, it is characterised in that in the first step, have described object to be detected and just include
At least one in pole piece, negative plate and barrier film.
3. detection method as claimed in claim 2, it is characterised in that the active material of described positive plate includes iron phosphate
Lithium LiFePO4, LiMn2O4 LiMn2O2, nickle cobalt lithium manganate LiNixCoyMnzO2With nickel cobalt aluminum lithium LiNixCoyAlzO2In at least one
Kind, wherein, 0 ＜ x, y, z ＜ 1, x+y+z=1.
4. detection method as claimed in claim 2, it is characterised in that the active material of described cathode pole piece includes stone
At least one in ink, MCMB, hard carbon and soft carbon.
5. detection method as claimed in claim 2, it is characterised in that described barrier film is for using polyethylene or polypropylene material system
The monofilm become, or the multilayer film made for employing polyethylene and polypropylene material.
6. the detection method as described in claim 2 or 5, it is characterised in that described barrier film is the barrier film with ceramic coating.
7. detection method as claimed in claim 6, it is characterised in that described ceramic coating for use aluminium oxide Al 2O3 and/or
Kynoar PVDF smears formed coating.
8. the detection method as according to any one of claim 1 to 5, it is characterised in that in the first step, described container is one
Individual open-topped glass.
9. the detection method as according to any one of claim 1 to 5, it is characterised in that in the third step, described preset temperature
Data interval is 40 DEG C～80 DEG C, and described predetermined vacuum degree numerical intervals is-50Mpa～-90Mpa.
10. the detection method as according to any one of claim 1 to 5, it is characterised in that in the 4th step, has described presetting
Time span is 1min～100min；
That detects the liquid absorption of described object to be detected concretely comprises the following steps:
Take out the object described to be detected after imbibition, when its surface does not has free electrolyte, with balance to described in after imbibition
Object to be detected weighs, and after deducting the described object to be detected qualitative data before imbibition, finally gives described to be checked
Survey the liquid absorption of object.
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| CN201610620327.8A CN106291377A (en) | 2016-07-28 | 2016-07-28 | A kind of detection method of lithium ion battery absorbent |
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| CN201610620327.8A CN106291377A (en) | 2016-07-28 | 2016-07-28 | A kind of detection method of lithium ion battery absorbent |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152751A (en) * | 2017-12-29 | 2018-06-12 | 山东精工电子科技有限公司 | A kind of lithium ion battery cell liquid absorption amount test device and method |
| CN108387478A (en) * | 2017-05-18 | 2018-08-10 | 惠州市宙邦化工有限公司 | A kind of imbibition test method and device |
| CN108663279A (en) * | 2018-04-27 | 2018-10-16 | 中航锂电（洛阳）有限公司 | A kind of measurement device of battery pole piece absorbency |
| CN108680865A (en) * | 2018-05-18 | 2018-10-19 | 力神动力电池系统有限公司 | A kind of detection method of electrolyte solution for lithium ion secondary battery cycle performance |
| CN108680866A (en) * | 2018-05-18 | 2018-10-19 | 力神动力电池系统有限公司 | A kind of detection method of lithium rechargeable battery cycle performance |
| CN109100252A (en) * | 2018-06-29 | 2018-12-28 | 广东天劲新能源科技股份有限公司 | The device and method of electrodes of lithium-ion batteries, diaphragm absorbent can accurately be detected |
| CN109709000A (en) * | 2018-12-28 | 2019-05-03 | 河北金力新能源科技股份有限公司 | Diaphragm infiltrates system safety testing device and method |
| CN111413261A (en) * | 2020-04-01 | 2020-07-14 | 浙江天能电池(江苏)有限公司 | Method for detecting porosity of active substance of polar plate |
| CN111879651A (en) * | 2020-06-28 | 2020-11-03 | 深圳市星源材质科技股份有限公司 | Method for testing liquid absorption rate and liquid retention rate of diaphragm |
| CN112649739A (en) * | 2020-12-22 | 2021-04-13 | 惠州亿纬创能电池有限公司 | Method and device for determining standing time after battery liquid injection |
| CN112858103A (en) * | 2021-01-11 | 2021-05-28 | 湖北亿纬动力有限公司 | Wettability testing device and testing method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387478A (en) * | 2017-05-18 | 2018-08-10 | 惠州市宙邦化工有限公司 | A kind of imbibition test method and device |
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| CN108663279A (en) * | 2018-04-27 | 2018-10-16 | 中航锂电（洛阳）有限公司 | A kind of measurement device of battery pole piece absorbency |
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| CN108680866B (en) * | 2018-05-18 | 2020-10-30 | 力神动力电池系统有限公司 | Method for detecting cycle performance of lithium ion secondary battery |
| CN108680865A (en) * | 2018-05-18 | 2018-10-19 | 力神动力电池系统有限公司 | A kind of detection method of electrolyte solution for lithium ion secondary battery cycle performance |
| CN109100252A (en) * | 2018-06-29 | 2018-12-28 | 广东天劲新能源科技股份有限公司 | The device and method of electrodes of lithium-ion batteries, diaphragm absorbent can accurately be detected |
| CN109100252B (en) * | 2018-06-29 | 2022-08-30 | 广东天劲新能源科技股份有限公司 | Equipment and method capable of accurately detecting liquid absorption performance of lithium ion battery pole piece and diaphragm |
| CN109709000A (en) * | 2018-12-28 | 2019-05-03 | 河北金力新能源科技股份有限公司 | Diaphragm infiltrates system safety testing device and method |
| CN111413261A (en) * | 2020-04-01 | 2020-07-14 | 浙江天能电池(江苏)有限公司 | Method for detecting porosity of active substance of polar plate |
| CN111879651A (en) * | 2020-06-28 | 2020-11-03 | 深圳市星源材质科技股份有限公司 | Method for testing liquid absorption rate and liquid retention rate of diaphragm |
| CN112649739A (en) * | 2020-12-22 | 2021-04-13 | 惠州亿纬创能电池有限公司 | Method and device for determining standing time after battery liquid injection |
| CN112649739B (en) * | 2020-12-22 | 2022-10-14 | 惠州亿纬创能电池有限公司 | Method and device for determining standing time after battery liquid injection |
| CN112858103A (en) * | 2021-01-11 | 2021-05-28 | 湖北亿纬动力有限公司 | Wettability testing device and testing method thereof |
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