CN114112202A - Method for analyzing packaging reliability of button cell - Google Patents
Method for analyzing packaging reliability of button cell Download PDFInfo
- Publication number
- CN114112202A CN114112202A CN202010883910.4A CN202010883910A CN114112202A CN 114112202 A CN114112202 A CN 114112202A CN 202010883910 A CN202010883910 A CN 202010883910A CN 114112202 A CN114112202 A CN 114112202A
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- Prior art keywords
- packaging
- loss rate
- weight
- steel shell
- weight loss
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000004580 weight loss Effects 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 239000008367 deionised water Substances 0.000 claims abstract description 11
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 11
- 238000005303 weighing Methods 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000007547 defect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a method for analyzing the packaging reliability of a button cell, which comprises the following steps: (1) weighing the original weight m0 of the steel shell, (2) injecting a certain amount of deionized water by using a syringe, (3) packaging and weighing the total weight m1, (4) baking, (5) weighing the baked total weight m2 again, (6) calculating the weight loss rate of 100% (m 1-m 2)/(m 1-m 0), and (7) judging the packaging reliability according to the value of the weight loss rate. The method judges the sealing property of the steel shell according to the loss condition of water in the shell. The method is convenient to operate and easy to popularize.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a method for analyzing packaging reliability of a button cell.
Background
Along with the development of economy and the progress of society, the life of people is more and more intelligent and convenient. The advent of various electronic devices has reduced the labor of people, making the effort double. Among them, the battery is one of the indispensable configurations for the endurance of the electronic device.
At present, a button cell is an all-metal-shell sealed cell, and is characterized by small cell volume, so that it can be extensively used in computer, hearing aid, electronic watch, radio and various electronic small products. However, a key process in the production process is to seal the positive and negative shells and the sealing ring by using special packaging equipment. The sealing effect is mainly detected by the corresponding size of the card at present.
In view of the above, there is a need to provide a method for analyzing the reliability of a button cell package to solve the deficiencies in the prior art.
Disclosure of Invention
The invention mainly aims at the defects of the prior art and provides a method for analyzing the packaging reliability of a button cell, which judges the sealing property of a steel shell by measuring the loss condition of water in the shell. The method is convenient to operate and easy to popularize.
In order to achieve the purpose, the following technical scheme is adopted by the invention:
a method for analyzing the packaging reliability of a button cell comprises the following steps:
s1: weighing the original weight m0 of the steel shell by using a high-precision electronic scale;
s2: injecting deionized water by using an injector, wherein the injection amount is 0.1-0.3 mL;
s3: after packaging, weighing the total weight m1 of the steel shell and the water by using a high-precision electronic scale;
s4: placing the steel shell injected with the deionized water into an oven for baking, wherein the temperature is set to be 85-95 ℃, and the time is set to be 18-24 hours;
s5: weighing the baked total weight m2 again by using a high-precision electronic scale;
s6: the calculated weight loss rate is 100% (m 1-m 1)/(m 1-m 0);
s7: judging the packaging reliability through the weight loss rate, and if the weight loss rate is more than 0.5%, determining that the packaging has defects; if the weight loss rate is less than or equal to 0.5 percent, the packaging is reliable.
The high-precision electronic scale display value of the weighed weight in the steps S1, S3, S5 was 0.0001 g.
The conductivity of the deionized water in the S2 is less than or equal to 10 mu S/cm.
And the step S3, the packaging of the steel shell is completed by adopting a special packaging machine.
By the technical scheme, the method for analyzing the packaging reliability of the button cell has the following advantages:
(1) the method for analyzing the packaging reliability of the button cell can quickly and accurately judge the sealing performance of the packaged positive and negative electrode shells and the sealing ring;
(2) the method for analyzing the packaging reliability of the button cell does not need to invest equipment, is convenient to operate and is easy to popularize.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, are incorporated in and constitute a part of this application, and are not intended to limit the invention.
FIG. 1 is an analytical flow chart of the present invention.
FIG. 2 shows the data tested in example 1 of the present invention.
FIG. 3 shows the data tested in example 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by persons skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as in step (1) of the analytical flow of FIG. 1, the original weight m0 of 1254 steel shell was first weighed using a high precision electronic scale displaying a value of 0.0001g (i.e.: 0.1 mg): injecting deionized water with the conductivity less than or equal to 10 mu S/cm by using an injector, wherein the water injection amount is 0.1-0.3 mL. Then, the resultant was press-sealed by using a 1254 sealer, and the total weight m1 was weighed by using a high-precision electronic scale showing a value of 0.0001g (i.e., 0.1 mg). And (3) placing the 1254 steel shell injected with the deionized water into an oven for baking, wherein the temperature is set to be 85-95 ℃, and the time is set to be 18 hours. The total weight m2 after baking was weighed again using a high precision electronic scale. The weight loss ratio was calculated as shown in fig. 2, and the results thereof are shown: the minimum value of the weight loss rate is 15#, and the value is 0.128%; the maximum value of the weight loss rate is 19#, and the value is 0.305%; when the weight loss rate is less than or equal to 0.5 percent, the packaging is judged to be reliable.
Example 2:
as in step (1) of the analytical flow of FIG. 1, the original weight m0 of 1254 steel shell was first weighed using a high precision electronic scale displaying a value of 0.0001g (i.e.: 0.1 mg): injecting deionized water with the conductivity less than or equal to 10 mu S/cm by using an injector, wherein the water injection amount is 0.1-0.3 mL. Then, the resultant was press-sealed by using a 1254 sealer, and the total weight m1 was weighed by using a high-precision electronic scale showing a value of 0.0001g (i.e., 0.1 mg). And (3) placing the 1254 steel shell injected with the deionized water into an oven for baking, wherein the temperature is set to be 85-95 ℃, and the time is set to be 24 hours. The total weight m2 after baking was weighed again using a high precision electronic scale. The weight loss ratio was calculated as shown in fig. 3, and the results thereof are shown: the minimum value of the weight loss rate is 27#, and the value is 0.132%; the maximum value of the weight loss rate is 33#, and the value is 0.323%. When the weight loss rate is less than or equal to 0.5 percent, the packaging is judged to be reliable.
By integrating the embodiment 1 and the embodiment 2, the two groups of experimental data have high goodness of fit and have no obvious change along with the adjustment of the weight loss rate of time, which shows that the lost moisture is the moisture on the surface of the electricity-fastening shell, the internal moisture can not be reduced along with the lapse of time, and the packaging reliability and the testing accuracy of the method are synchronously proved. The method is simple to operate, and can quickly and accurately judge the packaging effect of the button cell.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the specific examples are applied herein to explain the principles and embodiments of the present invention, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; while the invention has been described with reference to specific embodiments and applications, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (4)
1. A method for analyzing the packaging reliability of a button cell is characterized in that: the method comprises the following steps:
s1: weighing the original weight m0 of the steel shell by using a high-precision electronic scale;
s2: injecting deionized water by using an injector, wherein the injection amount is 0.1-0.3 mL;
s3: after packaging, weighing the total weight m1 of the steel shell and the water by using a high-precision electronic scale;
s4: placing the steel shell injected with the deionized water into an oven for baking, wherein the temperature is set to be 85-95 ℃, and the time is set to be 18-24 hours;
s5: weighing the baked total weight m2 again by using a high-precision electronic scale;
s6: the calculated weight loss rate is 100% (m 1-m 1)/(m 1-m 0);
s7: judging the packaging reliability through the weight loss rate, and if the weight loss rate is more than 0.5%, determining that the packaging has defects; if the weight loss rate is less than or equal to 0.5 percent, the packaging is reliable.
2. The method of claim 1, wherein the method further comprises: the high-precision electronic scale display value of the weighed weight in the steps S1, S3, S5 was 0.0001 g.
3. The method of claim 1, wherein the method further comprises: the conductivity of the deionized water in the S2 is less than or equal to 10 mu S/cm.
4. The method of claim 1, wherein the method further comprises: and the step S3, the packaging of the steel shell is completed by adopting a special packaging machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010883910.4A CN114112202A (en) | 2020-08-28 | 2020-08-28 | Method for analyzing packaging reliability of button cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010883910.4A CN114112202A (en) | 2020-08-28 | 2020-08-28 | Method for analyzing packaging reliability of button cell |
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| Publication Number | Publication Date |
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| CN114112202A true CN114112202A (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010883910.4A Pending CN114112202A (en) | 2020-08-28 | 2020-08-28 | Method for analyzing packaging reliability of button cell |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009117406A (en) * | 2007-11-01 | 2009-05-28 | Nippon Avionics Co Ltd | Method and apparatus for managing water content of semiconductor package |
| CN101984339A (en) * | 2010-07-29 | 2011-03-09 | 天津力神电池股份有限公司 | Testing method for packaging effect of battery cell packaging bag |
| CN103148990A (en) * | 2013-02-04 | 2013-06-12 | 百顺松涛（天津）动力电池科技发展有限公司 | Lithium ion battery gas tightness detecting method |
| CN104953182A (en) * | 2015-05-25 | 2015-09-30 | 安徽天康(集团)股份有限公司 | Method for achieving purpose of package sealing of side surface of square steel-shell power lithium ion battery |
| CN110887616A (en) * | 2018-09-07 | 2020-03-17 | 江西格林德能源有限公司 | Method for detecting leakage of tab glue part of soft package lithium ion battery |
-
2020
- 2020-08-28 CN CN202010883910.4A patent/CN114112202A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009117406A (en) * | 2007-11-01 | 2009-05-28 | Nippon Avionics Co Ltd | Method and apparatus for managing water content of semiconductor package |
| CN101984339A (en) * | 2010-07-29 | 2011-03-09 | 天津力神电池股份有限公司 | Testing method for packaging effect of battery cell packaging bag |
| CN103148990A (en) * | 2013-02-04 | 2013-06-12 | 百顺松涛（天津）动力电池科技发展有限公司 | Lithium ion battery gas tightness detecting method |
| CN104953182A (en) * | 2015-05-25 | 2015-09-30 | 安徽天康(集团)股份有限公司 | Method for achieving purpose of package sealing of side surface of square steel-shell power lithium ion battery |
| CN110887616A (en) * | 2018-09-07 | 2020-03-17 | 江西格林德能源有限公司 | Method for detecting leakage of tab glue part of soft package lithium ion battery |
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Application publication date: 20220301 |