CN112504567A - Method for detecting leakage of lithium battery - Google Patents
Method for detecting leakage of lithium battery Download PDFInfo
- Publication number
- CN112504567A CN112504567A CN202011269332.1A CN202011269332A CN112504567A CN 112504567 A CN112504567 A CN 112504567A CN 202011269332 A CN202011269332 A CN 202011269332A CN 112504567 A CN112504567 A CN 112504567A
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- China
- Prior art keywords
- battery
- oven
- negative pressure
- lithium battery
- placing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract description 10
- 238000005192 partition Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims 2
- 238000001514 detection method Methods 0.000 abstract description 5
- 239000003792 electrolyte Substances 0.000 description 9
- 230000007547 defect Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 229910001290 LiPF6 Inorganic materials 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910019256 POF3 Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- FFUQCRZBKUBHQT-UHFFFAOYSA-N phosphoryl fluoride Chemical compound FP(F)(F)=O FFUQCRZBKUBHQT-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a method for detecting leakage of a lithium battery, which comprises the following steps: providing a battery accommodating device, inversely placing a battery in an accommodating cavity of the battery accommodating device, and placing pH test paper at the bottom of the accommodating cavity; placing the battery fixing device in an oven, and pumping negative pressure to the oven to keep the interior of the oven at negative pressure for a certain time and then stopping pumping negative pressure; and (4) recovering the pressure in the oven to the normal pressure, then taking out the battery fixing device, checking whether the pH test paper changes color, and if so, judging that the battery has a leakage condition. The invention provides a leakage detection method suitable for non-quantitative products or newly developed lithium batteries, which is simple, quick, easy to realize and high in accuracy.
Description
Technical Field
The invention relates to the technical field of lithium battery detection, in particular to a method for detecting leakage of a lithium battery.
Background
The defect that lithium cell probably has aluminium shell and apron laser welding in welding process, annotates liquid hole welding defect, explosion-proof valve damage defect, and these gas tightness defects probably cause the condition of the appearance weeping of lithium cell, and the gas tightness test to the lithium cell is mainly carried out through the mode that helium examined at present, and helium examines mainly to the volume production product battery of producing the line, and to non-volume product or newly-developed lithium cell, the mode that helium examined can't be suitable for. Therefore, it is necessary to develop a leakage detection method for a non-mass-produced or newly developed lithium battery.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method for detecting leakage of a lithium battery.
The invention provides a method for detecting leakage of a lithium battery, which comprises the following steps:
s1, providing a battery accommodating device, inversely placing the battery in an accommodating cavity of the battery accommodating device, and placing pH test paper at the bottom of the accommodating cavity;
s2, placing the battery fixing device in an oven, and pumping negative pressure to the oven to keep the interior of the oven at negative pressure for a certain time and then stopping pumping negative pressure;
and S3, recovering the pressure in the oven to normal pressure, then taking out the battery fixing device, checking whether the pH test paper changes color, and if so, determining that the battery has a liquid leakage condition.
Preferably, in the step S2, the inside of the oven is maintained at a negative pressure of-0.095 to-0.05 MPa for 10 to 60 min.
Preferably, the pH test paper changes color within the range of pH 3-4.
Preferably, the battery accommodating device comprises a bottom plate and a plurality of partition plates vertically arranged on the bottom plate, and the partition plates and the bottom plate enclose an accommodating cavity for accommodating the lithium battery.
Preferably, the clapboard can be arranged on the bottom plate in a pluggable and movable combination mode, so that the inserting position of the clapboard can be determined according to the thickness of the battery, and the bottom plate can be cleaned conveniently after a leakage test.
Preferably, the material of the bottom plate and the separator of the battery accommodating device can be wood or metal.
The invention discloses a method for detecting leakage of a lithium battery, which is used for detecting whether the lithium battery has electrolyte leakage.
The specific method of the invention is as follows: providing a battery accommodating device, inversely placing a battery in an accommodating cavity of the battery accommodating device, and placing pH test paper at the bottom of the accommodating cavity; placing the battery fixing device in an oven, and pumping negative pressure to the oven to keep the interior of the oven at negative pressure for a certain time and then stopping pumping negative pressure; and (4) recovering the pressure in the oven to the normal pressure, then taking out the battery fixing device, checking whether the pH test paper changes color, and if so, judging that the battery has a leakage condition.
The main principle of the invention is as follows: in the detection process, the external environment of the battery is in a negative pressure state, and gas exists in the battery, so that the battery is subjected to the detectionPressure is generated inside, and if the battery has an explosion-proof valve or a welding defect, the electrolyte overflows to the external environment from the defect position under the action of internal air pressure; and because the electrolyte of the lithium battery is soft acidic, if the electrolyte of the lithium battery leaks, the electrolyte leaked by the battery drops on the PH test paper under the action of gravity, and the solute main component of the electrolyte of the lithium battery is LiPF6The electrolyte reacts with moisture in the air to generate HF, the HF is dissolved in the electrolyte to make the electrolyte acidic and generate a color change reaction with the PH test paper, and the reaction equation is as follows:
LiPF6+H2O＝2HF+POF3↑+LiF↓
the invention has the following beneficial effects:
the invention provides a leakage detection method suitable for non-quantitative products or newly developed lithium batteries, which is simple, quick, easy to realize and high in accuracy.
Drawings
Fig. 1 is a schematic view of a battery housing apparatus used in a method for detecting leakage of a lithium battery according to embodiment 1 of the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A method for detecting leakage of a lithium battery comprises the following steps:
s1, providing a battery housing device, comprising: the lithium battery box comprises a bottom plate and a plurality of partition plates which are vertically arranged on the bottom plate in a pluggable mode, wherein the partition plates and the bottom plate enclose an accommodating cavity for accommodating a lithium battery;
placing the battery in the accommodating cavity in an inverted manner, and placing the pH test paper at the bottom of the accommodating cavity;
s2, placing the battery fixing device in an oven, and pumping negative pressure to the oven to keep the interior of the oven at negative pressure of-0.08 MPa for 30min and then stopping pumping negative pressure;
and S3, recovering the pressure in the oven to normal pressure, then taking out the battery fixing device, checking whether the pH test paper changes color, and if so, determining that the battery has a liquid leakage condition.
In step S3, a pH test paper which changes color within a pH range of 3-4 is used.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A method for detecting leakage of a lithium battery is characterized by comprising the following steps:
s1, providing a battery accommodating device, inversely placing the battery in an accommodating cavity of the battery accommodating device, and placing pH test paper at the bottom of the accommodating cavity;
s2, placing the battery fixing device in an oven, and pumping negative pressure to the oven to keep the interior of the oven at negative pressure for a certain time and then stopping pumping negative pressure;
and S3, recovering the pressure in the oven to normal pressure, then taking out the battery fixing device, checking whether the pH test paper changes color, and if so, determining that the battery has a liquid leakage condition.
2. The method for detecting leakage of lithium battery claimed in claim 1, wherein in step S2, the inside of the oven is maintained at a negative pressure of-0.095 to-0.05 Mpa for 10 to 60 min.
3. The method for detecting leakage of a lithium battery as claimed in claim 1 or 2, wherein the pH paper changes color within a range of pH 3 to 4.
4. The method for detecting the leakage of the lithium battery as claimed in any one of claims 1 to 3, wherein the battery accommodating device comprises a bottom plate and a plurality of partition plates vertically arranged on the bottom plate, and the partition plates and the bottom plate enclose an accommodating cavity for accommodating the lithium battery.
5. The method of claim 4, wherein the spacer is a pluggable spacer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269332.1A CN112504567A (en) | 2020-11-13 | 2020-11-13 | Method for detecting leakage of lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269332.1A CN112504567A (en) | 2020-11-13 | 2020-11-13 | Method for detecting leakage of lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112504567A true CN112504567A (en) | 2021-03-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011269332.1A Pending CN112504567A (en) | 2020-11-13 | 2020-11-13 | Method for detecting leakage of lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112504567A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218589A (en) * | 2021-04-02 | 2021-08-06 | 苏州领湃新能源科技有限公司 | Leakage testing device and method for lithium ion battery |
| CN114235297A (en) * | 2021-11-25 | 2022-03-25 | 邓育龙 | Lead-acid storage battery shell breakage and sealing performance detection equipment |
| CN114388907A (en) * | 2022-01-11 | 2022-04-22 | 恒义超然工业技术(上海)有限公司 | Battery box for detecting battery leakage and processing technology thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729798A (en) * | 2015-04-02 | 2015-06-24 | 天津力神电池股份有限公司 | Battery sealing performance testing method |
| CN108195831A (en) * | 2018-01-10 | 2018-06-22 | 华霆（合肥）动力技术有限公司 | Battery leakage detection method and device |
-
2020
- 2020-11-13 CN CN202011269332.1A patent/CN112504567A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729798A (en) * | 2015-04-02 | 2015-06-24 | 天津力神电池股份有限公司 | Battery sealing performance testing method |
| CN108195831A (en) * | 2018-01-10 | 2018-06-22 | 华霆（合肥）动力技术有限公司 | Battery leakage detection method and device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218589A (en) * | 2021-04-02 | 2021-08-06 | 苏州领湃新能源科技有限公司 | Leakage testing device and method for lithium ion battery |
| CN114235297A (en) * | 2021-11-25 | 2022-03-25 | 邓育龙 | Lead-acid storage battery shell breakage and sealing performance detection equipment |
| CN114388907A (en) * | 2022-01-11 | 2022-04-22 | 恒义超然工业技术(上海)有限公司 | Battery box for detecting battery leakage and processing technology thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210316 |
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| RJ01 | Rejection of invention patent application after publication |