CN111090052A - Method for detecting burrs of pole group of reserve lithium battery - Google Patents
Method for detecting burrs of pole group of reserve lithium battery Download PDFInfo
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- CN111090052A CN111090052A CN201911185962.8A CN201911185962A CN111090052A CN 111090052 A CN111090052 A CN 111090052A CN 201911185962 A CN201911185962 A CN 201911185962A CN 111090052 A CN111090052 A CN 111090052A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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Abstract
The invention discloses a method for detecting burrs of a pole group of a reserve type lithium battery, which comprises a pressure applying device, an insulation resistance tester, a pole group sealing bag and a pressure working medium.
Description
Technical Field
The invention relates to the technical field of detection in a lithium battery manufacturing process, in particular to a pole group burr detection method of a reserve type lithium battery.
Background
Reserve cells are an important branch of chemical power supplies and are primarily characterized by the separation of the electrolyte from the group of poles during storage until the electrolyte contacts the group of poles during use, as is well known to those skilled in the art. The reserve type battery has wide application prospect in the aspects of military equipment and aerospace, for example, the traditional reserve type zinc-silver battery is rapidly developed and applied in the 20 th century, but the traditional reserve type zinc-silver battery has the defects of low energy density, poor high and low temperature performance and the like, the requirement of the military equipment on the electrical performance cannot be met, and the reserve type lithium battery has the advantages of high energy density, good high and low temperature performance, stable voltage and the like, and can meet the requirement of the new generation of missile, aircraft, torpedo and other weaponry on the electrical performance.
The pole group burr screening and detecting of the reserve lithium battery plays a crucial role in reliable operation of the battery, and the burrs of the pole piece in the pole group are too long, so that internal short circuit between the positive pole and the negative pole in the battery is increased, and even the battery fails to be activated and cannot output electric energy. The pole piece burrs are generated by stretching of a cross-section current collector generated during punching of the battery pole piece, the length of the burrs is smaller than the thickness of a diaphragm between a positive electrode and a negative electrode, but the burrs cannot be completely eliminated by the existing manufacturing technology, particularly the manufacturing technology of the positive electrode and the negative electrode, and the detection and screening of the burrs of the pole group are required to be enhanced.
Because the traditional pole group burr detection method such as (Hi-Pot voltage resistance test) clamps the pole group through two rigid plates and performs insulation resistance detection on the positive pole and the negative pole of the pole group, the rigid plates cannot enable each point of the pole group to be uniformly pressed due to the difference of the thicknesses of all points in the pole group, and thus the hidden trouble of missing the measurement of the pole group burrs at certain positions exists. How to comprehensively detect the burrs of the reserve lithium battery pole group is one of the key problems for determining whether the reserve lithium battery pole group can be activated reliably or not.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a pole group burr detection method of a reserve lithium battery.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problem is as follows: a pole group burr detection method of a reserve type lithium battery comprises the following steps
S01, selecting a pole group sealing bag with a base material of an aluminum plastic film or a thermoplastic polymer material, and placing the pole group to be detected into the pole group sealing bag for sealing, wherein only the positive and negative leads of the pole group extend out of the bag;
s02, selecting a pressure applying device to inject pressure working medium, immersing the pole group sealing bag in the pressure working medium, and only keeping the positive and negative leads extending out of the pressure applying device;
s03, connecting an insulation resistance tester on the positive and negative leads of the electrode group;
s04, the pressure applying device applies pressure to the pole group sealing bags through the pressure working medium at the speed of 0.1-3.0 MPa/min until the pressure value is 10.0 MPa;
and S05, detecting the insulation resistance value between the positive electrode and the negative electrode of the electrode group in real time through an insulation resistance tester, wherein the value is more than or equal to 95% of the resistance value when no pressure is applied, and judging that the burrs of the electrode group are qualified.
According to the pole group burr detection method of the reserve lithium battery, the pressure working medium is mineral oil or insulating oil.
According to the method for detecting the burrs of the pole group of the reserve lithium battery, any surface of the pole group sealing bag is uniformly pressed.
The invention has the beneficial effects that: the invention is based on the uniform pressure transmission of the pressure working medium, so that each point of the pole group is uniformly pressed, the resistance value between the anode and the cathode of the pole group under a certain pressure is measured by the insulation resistance tester, and compared with the resistance value before pressing, the comprehensive screening and detection of the burrs of the pole group of the reserve lithium battery can be realized, and the reliability of the reserve lithium battery is improved.
Drawings
FIG. 1 is a schematic of the present invention.
The figures are numbered: 1-pressure applying device, 2-insulation resistance tester, 3-pole group sealing bag and 4-pressure working medium.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Referring to FIG. 1: and respectively connecting the positive electrode and the negative electrode of the electrode group sealing bag 3 with the positive measurement line and the negative measurement line of the insulation resistance tester 2, then placing the electrode group in the pressure applying device 1, and immersing the electrode group in the pressure working medium 4. Starting the pressure applying device 1 to apply pressure to 10.0MPa at a pressure applying rate of 1.0MPa/min, uniformly transmitting the pressure to each point on the surface of the pole group sealing bag 3 by the pressure working medium 4, further applying pressure to each point of the pole group, and detecting the insulation resistance value between the positive pole and the negative pole of the pole group in real time by the insulation resistance tester 2, wherein the value reaches 95% of the resistance value when no pressure is applied, and then judging that the burrs of the pole group are qualified.
The pressure applying device 1 in the method applies pressure to the pole group sealing bag 3 uniformly through the pressure working medium 4, and the insulation resistance value between the anode and the cathode of the pole group under the pressure is measured by the insulation battery tester 2 and is compared with the insulation resistance value under normal pressure. The qualified pole groups detected by the method are used for assembling finished batteries, and the reliability of the reserve lithium battery can be greatly improved.
Wherein the pressure applying speed of the pressure applying device 1 is 0.1-3.0 MPa/min.
Wherein, the base material of the pole group sealing bag 3 is an aluminum plastic film or a thermoplastic polymer material.
Wherein, the pressure working medium 4 is mineral oil or insulating oil.
The selection and use of the insulation resistance meter 2 and the pressure applying device 1 are well known to those skilled in the art and will not be described herein.
The above-described embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be applied, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the inventive concept of the present invention, and these embodiments are within the scope of the present invention.
Claims (3)
1. A pole group burr detection method of a reserve type lithium battery is characterized by comprising the following steps: comprises the following steps
S01, selecting a pole group sealing bag (3) with a base material of an aluminum plastic film or a thermoplastic polymer material, and placing a pole group to be detected into the pole group sealing bag (3) for sealing, wherein only the positive and negative leads of the pole group extend out of the bag;
s02, selecting a pressure applying device (1) to inject a pressure working medium (4), immersing the pole group sealing bag (3) in the pressure working medium (4), and only keeping the positive and negative leads extending out;
s03, connecting an insulation resistance tester (2) on the positive and negative leads of the electrode group;
s04, the pressure applying device (1) applies pressure to the pole group sealing bag (3) through the pressure working medium (4) at the speed of 0.1-3.0 MPa/min until the pressure value is 10.0 MPa;
and S05, detecting the insulation resistance value between the positive electrode and the negative electrode of the electrode group in real time through the insulation resistance tester (2), wherein the insulation resistance value reaches 95% of the resistance value when no pressure is applied, and judging that the burrs of the electrode group are qualified.
2. The method for detecting the burrs of the pole group of the reserve lithium battery as claimed in claim 1, wherein the pressure working medium (4) is mineral oil or insulating oil.
3. The method for detecting the burrs of the pole group of the reserve lithium battery as claimed in claim 1, wherein the sealing bag (3) of the pole group is uniformly pressed on any surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911185962.8A CN111090052A (en) | 2019-11-27 | 2019-11-27 | Method for detecting burrs of pole group of reserve lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911185962.8A CN111090052A (en) | 2019-11-27 | 2019-11-27 | Method for detecting burrs of pole group of reserve lithium battery |
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| CN111090052A true CN111090052A (en) | 2020-05-01 |
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| CN201911185962.8A Pending CN111090052A (en) | 2019-11-27 | 2019-11-27 | Method for detecting burrs of pole group of reserve lithium battery |
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Citations (8)
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| CN201859208U (en) * | 2010-11-15 | 2011-06-08 | 万向电动汽车有限公司 | Power battery insulation performance testing device |
| CN103018624A (en) * | 2012-12-27 | 2013-04-03 | 天津力神电池股份有限公司 | Detection method for plate set short circuit of flexible packaging batteries |
| CN104181436A (en) * | 2014-08-13 | 2014-12-03 | 江苏安瑞达新材料有限公司 | Method for testing lithium battery diaphragm short-circuit resistant capacity |
| CN204903649U (en) * | 2015-08-20 | 2015-12-23 | 宁德时代新能源科技有限公司 | Secondary cell pole piece resistance meter |
| CN107589376A (en) * | 2017-08-10 | 2018-01-16 | 上海交通大学 | The deep pressure battery performance test device in the full sea of simulation and method |
| CN108508367A (en) * | 2018-03-06 | 2018-09-07 | 天津力神电池股份有限公司 | The detection method of flexible-packed battery pole group short circuit |
| CN109444678A (en) * | 2018-09-19 | 2019-03-08 | 多氟多（焦作）新能源科技有限公司 | A kind of the battery core insulation test method and device of lithium ion battery |
| CN110426647A (en) * | 2019-07-03 | 2019-11-08 | 江西恒动新能源有限公司 | A kind of power lithium-ion battery negative pressure survey short-circuiting method |
-
2019
- 2019-11-27 CN CN201911185962.8A patent/CN111090052A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201859208U (en) * | 2010-11-15 | 2011-06-08 | 万向电动汽车有限公司 | Power battery insulation performance testing device |
| CN103018624A (en) * | 2012-12-27 | 2013-04-03 | 天津力神电池股份有限公司 | Detection method for plate set short circuit of flexible packaging batteries |
| CN104181436A (en) * | 2014-08-13 | 2014-12-03 | 江苏安瑞达新材料有限公司 | Method for testing lithium battery diaphragm short-circuit resistant capacity |
| CN204903649U (en) * | 2015-08-20 | 2015-12-23 | 宁德时代新能源科技有限公司 | Secondary cell pole piece resistance meter |
| CN107589376A (en) * | 2017-08-10 | 2018-01-16 | 上海交通大学 | The deep pressure battery performance test device in the full sea of simulation and method |
| CN108508367A (en) * | 2018-03-06 | 2018-09-07 | 天津力神电池股份有限公司 | The detection method of flexible-packed battery pole group short circuit |
| CN109444678A (en) * | 2018-09-19 | 2019-03-08 | 多氟多（焦作）新能源科技有限公司 | A kind of the battery core insulation test method and device of lithium ion battery |
| CN110426647A (en) * | 2019-07-03 | 2019-11-08 | 江西恒动新能源有限公司 | A kind of power lithium-ion battery negative pressure survey short-circuiting method |
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