CN109668958A - Wall coating detection method in a kind of li battery shell - Google Patents
Wall coating detection method in a kind of li battery shell Download PDFInfo
- Publication number
- CN109668958A CN109668958A CN201811500524.1A CN201811500524A CN109668958A CN 109668958 A CN109668958 A CN 109668958A CN 201811500524 A CN201811500524 A CN 201811500524A CN 109668958 A CN109668958 A CN 109668958A
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- China
- Prior art keywords
- detection method
- battery shell
- wall coating
- coating detection
- coating
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
Abstract
The invention discloses wall coating detection methods in a kind of li battery shell, characterized in that after cutting sample, puts in ultrasonic cleaning tank after cleaning, immerses in pure water, start Ultrasound Instrument certain time, after taking out drying, is evaluated according to evaluation criterion.The present invention has the characteristics that detection time is short, method is easy, visual result is good compared to existing detection method.
Description
Technical field
The present invention relates to a kind of li battery shell inner wall corrosion resistance of coating detection methods, belong to lithium battery inspection technology neck
Domain.
Background technique
To guarantee that lithium ion battery steel shell is not corroded because of electrolytic corrosion, steel shell can plate in process of production on its surface layer
The nickel coating of upper 3~5um thickness will not be by electrolytic corrosion, to guarantee lithium ion battery because the chemical property of nickel is stablized
Appearance is good, non-corroding trace.
Lithium ion battery can undergo slot rolling, back welding or sealing etc. to have the work step of processing to steel shell in the production process, these
Work step is likely to result in the destruction of steel shell surface layer nickel coating, and whether employee can not be by visually determining these work steps by nickel plating
Layer destroys completely, and battery is placed on detected in wet environment nickel coating whether destroy needs one day or one day or more when
Between, seriously affect production efficiency.So the method whether steel shell nickel coating is destroyed can quickly be determined by needing to develop one kind.
Summary of the invention
That the technical problem to be solved by the invention is to provide a kind of detection times is short, method is easy, visual result is good
Li battery shell corrosion resistance of coating detection method.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
Wall coating detection method in a kind of li battery shell, after sample is cut, puts in ultrasonic cleaning tank after cleaning,
It immerses in pure water, Ultrasound Instrument ultrasonic power and time is set, start Ultrasound Instrument, after taking out drying, commented according to evaluation criterion
Valence.
The pure water conductivity is lower than 5us/cm.
For nickel coating, setting Ultrasound Instrument power is 300~600W, and ultrasonic time is 15~30min, and experiment condition is room
Temperature.
For nickel coating, setting Ultrasound Instrument power is 600W, ultrasonic time 15min.
Sample is cut in half to shell bottom after turning down to level and is placed in rinse bath.
The evaluation method includes checking Deposit appearance gloss, cracking and corrosion rust spot.
Advantageous effects of the invention: the present invention examines wall coating in li battery shell using ultrasonic method
Survey, compare existing detection method, will test the time by foreshortening to 15min for 24 hours, and agents useful for same is simple, generate effect with
Common method is suitable, has substitutability, and compare common method, after this method cuts sample, is more convenient observation experiment
As a result, especially shell bottom result.
Detailed description of the invention
Fig. 1 is to cut schematic diagram for sample；
Fig. 2 is different thickness of coating (0.3um) samples using the method for the present invention result；
Fig. 3 is different thickness of coating (1.3um) samples using the method for the present invention result；
Fig. 4 is different thickness of coating (2um) samples using the method for the present invention result；
Fig. 5 is different thickness of coating (3um) Wuxi samples using the method for the present invention result；
Fig. 6 is 1 Wuxi sample of comparative example using national standard method result；
Fig. 7 is Shanghai sample using the method for the present invention result；
Fig. 8 is 2 Shanghai sample of comparative example using national standard method result；
Fig. 9 is that first plating steel shell sample uses the method for the present invention result；
Plating steel shell sample uses the method for the present invention result after Figure 10 is.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
Specimen method is as follows: as shown in Figure 1, sample is cut in half to shell bottom turn down to level after be placed on rinse bath
It is interior, it immerses in pure water, ultrasonic cleaning tank needs pre-cleaning clean, starts Ultrasound Instrument, and Ultrasound Instrument power is 600W, and ultrasonic time is
15min.After taking out drying, evaluated according to evaluation criterion.Pure water uses pure water meter water or pure water, it is desirable that pure water
Conductivity is lower than 5us/cm.Evaluation method includes checking Deposit appearance gloss, cracking and corrosion rust spot.
Comparative experiments: salt spray test
Embodiment 1, Wuxi produce, first plate steel shell, coating 0.3um, using experimental method of the present invention；
Embodiment 2, Wuxi produce, first plate steel shell, coating 1.3um, using experimental method of the present invention；
Embodiment 3, Wuxi produce, first plate steel shell, coating 2um, using experimental method of the present invention；
Embodiment 4, Wuxi produce, first plate steel shell, coating 3um, using experimental method of the present invention；
Comparative example 1, Wuxi produce, first plate steel shell, and coating 3um was sprayed, 16 using 8 hours that GB/T 6461-2002 is implemented
Hour static salt spray test method；
Embodiment 6, upper marine products first plate steel shell, coating 3um, using experimental method of the present invention；
Comparative example 2, upper marine products first plate steel shell, and coating 3um was sprayed, 16 using 8 hours that GB/T 6461-2002 is implemented
Hour static salt spray test method；
Embodiment 5, Wuxi produce, first plate steel shell, coating 3um, using experimental method of the present invention；
Embodiment 6, Wuxi produce, plate steel shell, coating 3um, using experimental method of the present invention afterwards；
Interpretation of result: by the way that different thickness of coating is arranged, can be convenient demonstration can be shown embodiment 1-4 using this method
Reveal nickel coating execution (present invention in execution mainly use the meat such as rust spot quantity, crackle and sample glossiness
It is illustrated for eye directly observation result), thickness is smaller, and plating damage layer situation is more significant, and rust spot quantity is more, embodiment 4,
5 are respectively adopted the comparison knot that the method for the present invention is tested with national standard method with batch sample for different sources with comparative example 1,2
Fruit, it can be seen that similar effect can achieve using the method for the present invention experimental result and national standard method experimental result, and for
The sample of separate sources can use, and embodiment 5,6 is respectively the steel shell that coating is carried out using first plating and rear depositing process, use
The method of the present invention is compared, and is both able to achieve execution as the result is shown, but first plating coating compares rear plating coating same
Time in, corrosion difficulty slightly higher than after plating coating (there are some differences in rust spot quantity and glossiness, such as Fig. 9, figure
10) the appropriate adjusting on ultrasonic time or power, can be carried out according to coating mode.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. wall coating detection method in a kind of li battery shell, characterized in that after cutting sample, the ultrasound put after cleaning is clear
It in washing trough, immerses in pure water, Ultrasound Instrument ultrasonic power and time is set, start Ultrasound Instrument, after taking out drying, according to evaluation criterion
It is evaluated.
2. wall coating detection method in a kind of li battery shell according to claim 1, characterized in that the pure water conductance
Rate is lower than 5us/cm.
3. wall coating detection method in a kind of li battery shell according to claim 1, characterized in that for nickel coating,
Setting Ultrasound Instrument power is 300~600W, and ultrasonic time is 15~30min, and experiment condition is room temperature.
4. wall coating detection method in a kind of li battery shell according to claim 3, characterized in that for nickel coating,
Setting Ultrasound Instrument power is 600W, ultrasonic time 15min.
5. wall coating detection method in a kind of li battery shell according to claim 1, characterized in that by sample to hemisection
It opens to shell bottom and is placed in rinse bath after turning down to level.
6. wall coating detection method in a kind of li battery shell according to claim 1, characterized in that the evaluation method
Including checking Deposit appearance gloss, cracking and corrosion rust spot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811500524.1A CN109668958A (en) | 2018-12-10 | 2018-12-10 | Wall coating detection method in a kind of li battery shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811500524.1A CN109668958A (en) | 2018-12-10 | 2018-12-10 | Wall coating detection method in a kind of li battery shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109668958A true CN109668958A (en) | 2019-04-23 |
Family
ID=66145042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811500524.1A Pending CN109668958A (en) | 2018-12-10 | 2018-12-10 | Wall coating detection method in a kind of li battery shell |
Country Status (1)
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Application publication date: 20190423 |