CN1300866C - Method for preparing short circuit proof electrode - Google Patents
Method for preparing short circuit proof electrode Download PDFInfo
- Publication number
- CN1300866C CN1300866C CNB2003101221605A CN200310122160A CN1300866C CN 1300866 C CN1300866 C CN 1300866C CN B2003101221605 A CNB2003101221605 A CN B2003101221605A CN 200310122160 A CN200310122160 A CN 200310122160A CN 1300866 C CN1300866 C CN 1300866C
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- electrode
- base material
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- coating machine
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- Y02E60/12—
Abstract
The present invention relates to a method for preparing an electrode for preventing short circuits, which comprises: blank base material for preparing the electrode penetrates through a coating machine, and the feed chute of the coating machine is regulated. The present invention is characterized in that a baffle plate for regulating the width of coats is arranged on the feed chute. The preparation method of the electrode comprises the following technological processes: the baffle plate of the feed chute is controlled, and the coat width of electrode slurry material on the blank base material is regulated; power supply of the coating machine is started, the penetrated and tensioning base material is coated by the coating machine, and an electrode of which both sides are provided with blank base material is obtained. The electrode for preventing short circuits can prevent coats from falling off to puncture membranes, and can improve the safety and reliability of batteries, and the electrode for preventing short circuits have the advantages of simple technology process and reliable product quality. The present invention is particularly suitable for preparing the electrode of a lithium ion battery with large capacity, and can be popularized on preparation of other battery electrodes with similar technology.
Description
Technical field
The invention belongs to the battery component preparing technical field, particularly relate to a kind of preparation method of anti-short-circuiting electrode.
Background technology
At present, the method for preparing lithium ion cell electrode is the different model according to battery, cuts into the electrode of respective width on the wide cut electrode.And the electrode after cutting is introduced impurity particle because of the both sides coating comes off easily, occurs cutting edge-curl phenomenon easily simultaneously, punctures barrier film in the battery assembling process easily, cause the assembling short circuit, cause decrease in yield, in cyclic process, bring out micro-short circuit, electrical property is descended, and generation potential safety hazard, present settling mode is by adding thick skirt and increase clear powder operation, and the former increases internal resistance, and capacity reduces, the latter increases workload, and reliability is low.Especially particularly serious to the destroying infection of high capacity lithium ion battery.
Summary of the invention
The present invention provides a kind of preparation method of anti-short-circuiting electrode for solving the problem that prior art exists.
The purpose of this invention is to provide does not a kind ofly have utmost point powder obscission fully improving battery capacity, the preparation method of reliability and safe anti-short-circuiting electrode.
The present invention adopts following technical scheme:
The preparation method of anti-short-circuiting electrode, the blank base material of making electrode is through on the coating machine, regulate the coating machine feed well, be characterized in that feed well is provided with two baffle plates adjusting the coating width, also be provided with 1 to some baffle plates between described two baffle plates, the preparation method of its electrode comprises following technical process: (1) control feed well baffle plate is regulated the coating width of electrode slurry on blank base material; (2) start the coating machine power supply, coating machine is to putting on and the base material of tensioning is coated with, and becomes the electrode that base material below the baffle plate is blank base material.
The present invention can also adopt following technical measures:
The preparation method of above-mentioned anti-short-circuiting electrode is characterized in that the blank base material width in electrode both sides is less than 2mm.
The preparation method of above-mentioned anti-short-circuiting electrode is characterized in that the slurry absolute viscosity is more than the 5000cps.
The preparation method of above-mentioned anti-short-circuiting electrode is characterized in that two distances between baffle plate are for adjustable continuously.
The preparation method of above-mentioned anti-short-circuiting electrode is characterized in that the base material below described baffle plate is a blank base material on the electrode, and the blank base material width of described electrode is more than the 2mm, cuts the anti-short-circuiting electrode that blank matrix promptly obtains required width.
Advantage that the present invention has and good effect:
The preparation method of anti-short-circuiting electrode, because the technical scheme that has adopted baffle plate restriction slurry to flow to, make the electrode both sides can leave less blank base material, avoided puncturing the battery short circuit that barrier film causes because of electrode both sides coating shedding, improved the fail safe of battery, and technological operation is simple, reliable product quality.
Description of drawings
Fig. 1 is the structural representation of the anti-short-circuiting electrode of the present invention.
Label among the figure is respectively: 1 for scribbling the part of slurry, and 2 is the part of blank base material.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, enumerate following example now and be described in detail as follows:
Embodiment 1
The preparation method of anti-short-circuiting electrode, with selecting width for use is that the blank base material that 200mm makes electrode places on the coating machine, regulate the coating machine feed well, control baffle plate distance is 198 ± 0.5mm, and it is the slurry of 7000cps that viscosity is gone up in the blank base material coating between described two baffle plates; Start the coating machine power supply, coating machine is coated with the base material of putting on also tensioning, and becoming the coating layer width is 198 ± 0.5mm, and both sides are that width is the anti-short-circuiting electrode of 1mm with the part of interior blank base material.
Embodiment 2
The preparation method of anti-short-circuiting electrode, with selecting width for use is that the blank base material that 300mm makes electrode places on the coating machine, regulate the coating machine feed well, be provided with 1 to some baffle plates again between described two baffle plates, it is the slurry of 7000cps that viscosity is gone up in the blank base material coating between adjacent two baffle plates; Start the coating machine power supply, coating machine is to putting on and the base material of tensioning is coated with, and becomes the both sides width and is 1mm and be coated with the part 2 that interlayer has blank matrix more than the 2mm with the part 2 of interior blank base material and two.Obtain the anti-short-circuiting electrode electrode of required width.
Claims (5)
1. the preparation method of an anti-short-circuiting electrode, the blank base material of making electrode is through on the coating machine, regulate the coating machine feed well, it is characterized in that: described feed well is provided with two baffle plates adjusting the coating width, also be provided with 1 to some baffle plates between described two baffle plates, the preparation method of its electrode comprises following technical process:
(1) control feed well baffle plate is regulated the coating width of electrode slurry on blank base material;
(2) start the coating machine power supply, coating machine is to putting on and the base material of tensioning is coated with, and becomes the electrode that base material below the baffle plate is blank base material.
2. the preparation method of anti-short-circuiting electrode according to claim 1 is characterized in that: the blank base material width in described electrode both sides is less than 2mm.
3. the preparation method of anti-short-circuiting electrode according to claim 1, it is characterized in that: described slurry absolute viscosity is more than the 5000cps.
4. the preparation method of anti-short-circuiting electrode according to claim 1, it is characterized in that: the distance between described two baffle plates is for adjustable continuously.
5. the preparation method of anti-short-circuiting electrode according to claim 1, it is characterized in that: the base material below described baffle plate is a blank base material on the electrode, the blank base material width of described electrode is more than the 2mm, cuts the anti-short-circuiting electrode that blank matrix promptly obtains required width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101221605A CN1300866C (en) | 2003-12-29 | 2003-12-29 | Method for preparing short circuit proof electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101221605A CN1300866C (en) | 2003-12-29 | 2003-12-29 | Method for preparing short circuit proof electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1635647A CN1635647A (en) | 2005-07-06 |
| CN1300866C true CN1300866C (en) | 2007-02-14 |
Family
ID=34844416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101221605A Expired - Fee Related CN1300866C (en) | 2003-12-29 | 2003-12-29 | Method for preparing short circuit proof electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1300866C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442575C (en) * | 2005-06-30 | 2008-12-10 | 深圳市比克电池有限公司 | Lithium ion battery pole piece coating method and coating machine |
| JP5002927B2 (en) * | 2005-08-25 | 2012-08-15 | パナソニック株式会社 | Non-aqueous electrolyte secondary battery and battery pack using the same |
| CN103236546B (en) * | 2013-04-18 | 2015-05-06 | 徐敖奎 | Battery glued substrate and pole piece, and battery pole piece gluing and cutting process |
| KR102031605B1 (en) | 2017-01-11 | 2019-10-14 | 주식회사 엘지화학 | Device Comprising Member for Preventing Short-Circuit for Measuring Electrode Potential by Using Three Electrode System |
| CN109585773A (en) * | 2017-09-28 | 2019-04-05 | 江苏津谊新能源科技有限公司 | A method of prevent inside lithium ion cell short-circuit |
| CN112635704A (en) * | 2020-12-28 | 2021-04-09 | 蜂巢能源科技有限公司 | Pole piece and pole piece coating method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001076708A (en) * | 1999-09-02 | 2001-03-23 | Toshiba Battery Co Ltd | Method of manufacturing of negative electrode material for polymer lithium secondary battery |
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2003
- 2003-12-29 CN CNB2003101221605A patent/CN1300866C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001076708A (en) * | 1999-09-02 | 2001-03-23 | Toshiba Battery Co Ltd | Method of manufacturing of negative electrode material for polymer lithium secondary battery |
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| Publication number | Publication date |
|---|---|
| CN1635647A (en) | 2005-07-06 |
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