CN102645587A - Method and device for electric conductivity test of lithium ion battery pole piece - Google Patents
Method and device for electric conductivity test of lithium ion battery pole piece Download PDFInfo
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- CN102645587A CN102645587A CN2012101279728A CN201210127972A CN102645587A CN 102645587 A CN102645587 A CN 102645587A CN 2012101279728 A CN2012101279728 A CN 2012101279728A CN 201210127972 A CN201210127972 A CN 201210127972A CN 102645587 A CN102645587 A CN 102645587A
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Abstract
The invention relates to a method and a device for an electric conductivity test of a lithium ion battery pole piece. The device comprises an internal resistance tester and a pole piece clamp, the pole piece clamp comprises a top electrode and a bottom electrode, the bottom electrode comprises a protecting electrode and a protected electrode, the top electrode and the protected electrode are cylinder conductive bodies, the protecting electrode is an electric conduction ring with the external diameter same with the diameter of the top electrode, the diameter of the protected electrode is smaller than the internal diameter of the protecting electrode, and the top electrode, the protecting electrode and the protected electrode are respectively connected with corresponding outgoing lines of the internal resistance tester. The top electrode and the bottom electrode are respectively connected with the corresponding outgoing lines of the internal resistance tester, so that electric conductivity of the pole piece can be detected, and pole piece internal resistance at different positions of the pole piece can be detected by moving the pole piece.
Description
Technical field
The invention belongs to the conductivity test technical field, relate to a kind of method of testing and device of electrodes of lithium-ion batteries coating conductance.
Background technology
Lithium ion battery is owing to have advantages such as high-energy-density high working voltage non-environmental-pollution has extended cycle life, and is widely used in mobile communication equipment and portable electric appts.The pole piece conductance that lithium ion battery prepares in the process has fundamental influence to the lithium ion battery performance; The pole piece conductance affects cycle life and internal resistance of lithium ion battery etc.; But existing pole piece coating conductance detection method mainly is that the pole piece that pole piece cuts into a certain size is fixed detection; And once can only detect a slice, can not all detect the optional position, this has had a strong impact on the efficient that the pole piece conductance detects; A pole piece can only detect a position simultaneously, has also seriously restricted accuracy of detection and accuracy.This is having a strong impact on the further raising of lithium ion battery system quality.
Summary of the invention
The purpose of this invention is to provide a kind of electrodes of lithium-ion batteries conductivity test method and device, the pole piece conductance detection efficiency that present pole piece fixed test brings is low to solve, accuracy of detection and the low problem of accuracy.
For realizing above-mentioned purpose, electrodes of lithium-ion batteries conductivity test method step of the present invention is following:
(1) get the pole piece for preparing and lie on the bottom electrode, and the guard electrode in this bottom electrode equidistantly is sheathed on by outside the guard electrode;
(2) with top electrode be put in the guard electrode superior pole piece directly over;
(3) positive outside wire with internal resistance test device is connected on the top electrode, and negative outside wire is connected in respectively by on guard electrode and the guard electrode;
(4) open internal resistance test device, record internal resistance test device video data is accomplished test behind the electrochemical setting-up time.
Further, pole piece is put in the pole piece level on the base less than the base size of band base bottom electrode in the said step (1).
Further, in the said step (2) the base button is located at the location and covers, this location lid is provided with respect to the guard electrode position on the base and is used for the circular hole that top electrode inserts, and top electrode is put into the circular hole of location lid.
Electrodes of lithium-ion batteries conductivity test device of the present invention; Comprise internal resistance test device; Also comprise the pole piece anchor clamps, these pole piece anchor clamps comprise top electrode and bottom electrode, and this bottom electrode comprises guard electrode and by guard electrode; Said top electrode and be the cylinder electric conductor by guard electrode; Said guard electrode is the overall diameter conductive ring identical with the diameter of top electrode, by the interior diameter of the diameter of guard electrode less than guard electrode, said top electrode, guard electrode, is linked to each other with the corresponding extension line of internal resistance test device respectively by guard electrode.
Further, said guard electrode is sheathed on by outside the guard electrode, and guard electrode and all be located on the rectangular base by guard electrode, said guard electrode and by between the guard electrode for equidistant space or be provided with dead ring.
Further, also comprise the location lid, this location covers and is provided with the locking mechanism that is used for base locking, and is provided with the circular hole that is used for the top electrode insertion corresponding to the guard electrode position on the base.
Electrodes of lithium-ion batteries conductivity test method of the present invention and device; Through top electrode, bottom electrode are linked to each other with the corresponding extension line of internal resistance test device respectively; Can not only detect the conductance size of pole piece, and can detect the internal resistance of pole piece diverse location pole piece through moving pole piece.
Description of drawings
Fig. 1 is that proving installation connects synoptic diagram;
Fig. 2 is a pole piece clamp structure synoptic diagram.
Embodiment
One, electrodes of lithium-ion batteries conductivity test device
As shown in Figure 1; Electrodes of lithium-ion batteries conductivity test device; Comprise internal resistance test device 4 and pole piece anchor clamps, these pole piece anchor clamps comprise top electrode 1 and bottom electrode, and this bottom electrode comprises guard electrode 21 and by guard electrode 23; Top electrode 1 and be the cylinder electric conductor by guard electrode 23; Guard electrode is the overall diameter conductive ring identical with the diameter of top electrode, by the interior diameter of the diameter of guard electrode less than guard electrode, top electrode, guard electrode, is linked to each other with the corresponding extension line of internal resistance test device respectively by guard electrode.
As shown in Figure 2, guard electrode 21 is sheathed on by outside the guard electrode 23, and guard electrode 21 and all be located on the rectangular base 22 by guard electrode 23, guard electrode 21 and by between the guard electrode 23 for equidistant space or be provided with dead ring.
Proving installation comprises that also the location cover 3, and this location lid 3 is provided with and is used for the locking mechanism that base is locked, and is provided with the circular hole that is used for the top electrode insertion corresponding to the guard electrode position on the base.
This device does not change the process conditions and the technological process of battery manufacturing technology, and under above-mentioned condition, selects pole piece as usage track shown in the present and detection.The pole piece anchor clamps can be processed by machine tool plant, and top electrode, guard electrode and be yellow ingot metal by guard electrode are by guard electrode and upper electrode surface metal spraying.
Two, electrodes of lithium-ion batteries conductivity test method
Electrodes of lithium-ion batteries conductivity test method step is following:
(1) get the pole piece for preparing and lie on the bottom electrode, and the guard electrode in this bottom electrode equidistantly is sheathed on by outside the guard electrode;
(2) with top electrode be put in the guard electrode superior pole piece directly over;
(3) positive outside wire with internal resistance test device is connected on the top electrode, and negative outside wire is connected in respectively by on guard electrode and the guard electrode;
(4) open internal resistance test device, record internal resistance test device video data is accomplished test behind the electrochemical setting-up time.
Pole piece is put in the pole piece level on the base less than the base size of band base bottom electrode in the step (1).
In the step (2) the base button is located at the location and covers, this location lid is provided with respect to the guard electrode position on the base and is used for the circular hole that top electrode inserts, and top electrode is put into the circular hole of location lid.
This electrodes of lithium-ion batteries conductivity test method cuts the pole piece sample of certain size earlier; Adopt the pole piece anchor clamps, sample is put into the pole piece anchor clamps, device is connected with internal resistance test device; Measure the pole piece resistance through internal resistance test device, thus the size of assessment pole piece coating conductance.This method controls simply, and measuring error is little, and favorable repeatability does not receive the influence of sample kind.
With anodal coating is that example is made bright specifically to electrodes of lithium-ion batteries conductivity test method:
1. be collector with the aluminium foil, coat anode sizing agent in the above, baking, relative dimensions is cut and be cut into as requested to roller;
2. pole piece is placed on the base of volume resistance home-made contrivance, will notes pole piece placement level during placement;
3. will locate lid and align with bottom electrode, top electrode is put in the circular hole of location lid, handles with care, prevents the pole piece of damaging;
4. will install good top electrode and connect the positive pole that exchanges internal resistance test device, bottom electrode connects the negative pole that exchanges internal resistance test device;
5. after opening the interchange internal resistance test device, electrification write down volume resistance after 2 ~ 5 minutes;
6. pick up top electrode, move pole piece gently, can measure the volume resistance of pole piece coating diverse location.
Be the resistance value of measuring twice of same position below:
Said method can reflect the size of pole piece coating volume resistance value effectively, for battery design and manufacturing process thereof provide reliable foundation, and then can improve the quality of product greatly, is applicable to stacked and the preparation coiled battery pole piece.
Claims (6)
1. electrodes of lithium-ion batteries conductivity test method is characterized in that the step of this method is following:
(1) get the pole piece for preparing and lie on the bottom electrode, and the guard electrode in this bottom electrode equidistantly is sheathed on by outside the guard electrode;
(2) with top electrode be put in the guard electrode superior pole piece directly over;
(3) positive outside wire with internal resistance test device is connected on the top electrode, and negative outside wire is connected in respectively by on guard electrode and the guard electrode;
(4) open internal resistance test device, record internal resistance test device video data is accomplished test behind the electrochemical setting-up time.
2. electrodes of lithium-ion batteries conductivity test method according to claim 1 is characterized in that, pole piece is put in the pole piece level on the base less than the base size of band base bottom electrode in the said step (1).
3. electrodes of lithium-ion batteries conductivity test method according to claim 2; It is characterized in that: in the said step (2) the base button is located at the location and covers; This location lid is provided with respect to the guard electrode position on the base and is used for the circular hole that top electrode inserts, and top electrode is put into the circular hole of location lid.
4. electrodes of lithium-ion batteries conductivity test device; Comprise internal resistance test device; It is characterized in that: also comprise the pole piece anchor clamps, these pole piece anchor clamps comprise top electrode and bottom electrode, and this bottom electrode comprises guard electrode and by guard electrode; Said top electrode and be the cylinder electric conductor by guard electrode; Said guard electrode is the overall diameter conductive ring identical with the diameter of top electrode, by the interior diameter of the diameter of guard electrode less than guard electrode, said top electrode, guard electrode, is linked to each other with the corresponding extension line of internal resistance test device respectively by guard electrode.
5. electrodes of lithium-ion batteries conductivity test device according to claim 4; It is characterized in that: said guard electrode is sheathed on by outside the guard electrode; And guard electrode and all be located on the rectangular base by guard electrode, said guard electrode and by between the guard electrode for equidistant space or be provided with dead ring.
6. according to each described electrodes of lithium-ion batteries conductivity test device in the claim 4,5; It is characterized in that: also comprise the location lid; This location covers and is provided with the locking mechanism that is used for base locking, and is provided with the circular hole that is used for the top electrode insertion corresponding to the guard electrode position on the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101279728A CN102645587A (en) | 2012-04-27 | 2012-04-27 | Method and device for electric conductivity test of lithium ion battery pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101279728A CN102645587A (en) | 2012-04-27 | 2012-04-27 | Method and device for electric conductivity test of lithium ion battery pole piece |
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| CN102645587A true CN102645587A (en) | 2012-08-22 |
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| CN2012101279728A Pending CN102645587A (en) | 2012-04-27 | 2012-04-27 | Method and device for electric conductivity test of lithium ion battery pole piece |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969509A (en) * | 2013-01-25 | 2014-08-06 | 江苏益茂纯电动汽车有限公司 | Method for measuring internal resistance of electrode materials |
| CN108196123A (en) * | 2017-12-27 | 2018-06-22 | 惠州亿纬锂能股份有限公司 | A kind of evaluation method of lithium ion battery cell internal resistance exception |
| CN108303592A (en) * | 2017-12-11 | 2018-07-20 | 惠州拓邦电气技术有限公司 | A kind of electrodes of lithium-ion batteries dressing layer conductivity test method |
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2012
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969509A (en) * | 2013-01-25 | 2014-08-06 | 江苏益茂纯电动汽车有限公司 | Method for measuring internal resistance of electrode materials |
| CN108303592A (en) * | 2017-12-11 | 2018-07-20 | 惠州拓邦电气技术有限公司 | A kind of electrodes of lithium-ion batteries dressing layer conductivity test method |
| CN108196123A (en) * | 2017-12-27 | 2018-06-22 | 惠州亿纬锂能股份有限公司 | A kind of evaluation method of lithium ion battery cell internal resistance exception |
| CN108196123B (en) * | 2017-12-27 | 2020-07-14 | 惠州亿纬锂能股份有限公司 | Method for judging abnormity of internal resistance of lithium ion battery cell |
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Application publication date: 20120822 |