CN102901338A - Drying method of pole piece for lithium ion battery - Google Patents
Drying method of pole piece for lithium ion battery Download PDFInfo
- Publication number
- CN102901338A CN102901338A CN2012103957735A CN201210395773A CN102901338A CN 102901338 A CN102901338 A CN 102901338A CN 2012103957735 A CN2012103957735 A CN 2012103957735A CN 201210395773 A CN201210395773 A CN 201210395773A CN 102901338 A CN102901338 A CN 102901338A
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- Prior art keywords
- pole piece
- nitrogen
- lithium
- dry
- electrodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a drying method of a pole piece for a lithium ion battery. The drying method comprises the following steps of: in a closed rectangular passage, first, blowing the pole piece horizontally moving to be dry by using dry hot nitrogen with a water content below 10 ppm and at temperature of 60-120 DEG C, and then, blowing the pole piece to be dry by using dry normal-temperature nitrogen with a water content below 10 ppm and at temperature of 15-35 DEG C. The method is simple, applicative, time-saving and labor-saving; the drying treatment for tens of minutes is only needed, so that the moisture content of a battery core before liquid injection can be controlled below 50 ppm; the manufacturing time of the lithium battery is greatly reduced; the dryness extent of the battery is improved; and the high-performance exertion of the battery is beneficial.
Description
Technical field
The present invention relates to the lithium ion battery manufacturing, particularly a kind of electrodes of lithium-ion batteries drying means.
Background technology
Compare traditional storage battery, lithium ion battery has the operating voltage height, and cycle life waits well remarkable performance advantage; The system that these remarkable performances stem from lithium ion battery work to a great extent belongs to a non-aqueous electrochemical system, therefore wants to produce the lithium ion battery of function admirable, just must carry out the particularly drying of pole piece of battery.Conventional lithium ion battery production, its pole piece, volume core all need to arrive tens of hours through reaching a few hours in baking oven baking, and often the front water content of the final fluid injection of battery is higher than 100ppm, wastes time and energy poor effect.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of time saving and energy saving, effective electrodes of lithium-ion batteries drying means is provided.
Technical scheme of the present invention is: the electrodes of lithium-ion batteries drying means is: first with pole piece with moisture below 10ppm, temperature is that 60～120 ℃ dry heat nitrogen dries up, again with moisture below 10ppm, temperature is that 15～35 ℃ dry normal temperature nitrogen dries up.
Further scheme is: level was by the semi-hermetic rectangular channel after described pole piece launched from takeup type, and passage first half district is that dry heat nitrogen blows the district, and later half district is that dry normal temperature nitrogen blows the district; Long 9～the 24m of described passage, it is 0.2～1.2m/min that pole piece moves horizontally speed; Described dry heat nitrogen and dry normal temperature nitrogen are sent from gas outlet, top and the bottom outlet of pole piece respectively, and the angle between the center line of upper and lower gas outlet and the pole piece direction of advance is 30 ℃～90 ℃; The pressure of the nitrogen that gas outlet, described top is sent is 0.1～0.3atm, and the pressure ratio top of the nitrogen that bottom outlet is sent goes out the large 0.02～0.1atm of atmospheric pressure; The port of export of described passage places dew point at the drying shed below-50 ℃.
Advantage of the present invention is:
Battery pole piece is only passed through primary drying, time-consuming tens of minutes, just the water content before the battery liquid-filling can be controlled at below the 50ppm, greatly reduced making the time of lithium ion battery, and improve the degree of drying of battery, to follow-up lithium ion battery high performance play a role very large.And the method is simple and practical, uses that cost is lower aborning, is worthy to be popularized.
The specific embodiment
Further specify the present invention below by embodiment.
Select the semi-hermetic rectangular channel of long 18m, passage is made by stainless steel, and horizontal positioned after battery anode slice launched by takeup type, enters from the passage left end, is packed up by the winder of passage right-hand member, and it is 0.3m/min that pole piece moves horizontally speed.Front 9m zone in left section of passage, adopt moisture below 10ppm, temperature is that 105 ℃ dry heat nitrogen dries up pole piece, rear 9m zone in right section of passage, adopt moisture below 10ppm, temperature is that 30 ℃ dry normal temperature nitrogen dries up pole piece, in two sections zones, nitrogen is sent from the gas outlet, above and below of pole piece respectively, and the top nitrogen pressure is 0.2atm, the below nitrogen pressure is 0.25atm, and angle is 80 between upper and lower gas outlet center line and the pole piece direction of advance
0The port of export of passage places dew point at the drying shed below-50 ℃.The pole piece of drying is cut rear making battery core, assembled battery, and the water content of test battery core is less than 50ppm before electrolyte injects.
Claims (6)
1. electrodes of lithium-ion batteries drying means, it is characterized in that first with pole piece with moisture below 10ppm, temperature is that 60～120 ℃ dry heat nitrogen dries up, again with moisture below 10ppm, temperature is that 15～35 ℃ dry normal temperature nitrogen dries up.
2. electrodes of lithium-ion batteries drying means according to claim 1 is characterized in that: level was by the semi-hermetic rectangular channel after described pole piece launched from takeup type, and passage first half district is that dry heat nitrogen blows the district, and later half district is that dry normal temperature nitrogen blows the district.
3. electrodes of lithium-ion batteries drying means according to claim 2 is characterized in that: the long 9～24m of described passage, it is 0.2～1.2m/min that pole piece moves horizontally speed.
4. electrodes of lithium-ion batteries drying means according to claim 2, it is characterized in that: described dry heat nitrogen and dry normal temperature nitrogen are sent from gas outlet, top and the bottom outlet of pole piece respectively, and the angle between the center line of upper and lower gas outlet and the pole piece direction of advance is 30 ℃～90 ℃.
5. electrodes of lithium-ion batteries drying means according to claim 4, it is characterized in that: the pressure of the nitrogen that gas outlet, described top is sent is 0.1～0.3atm, the pressure ratio top of the nitrogen that bottom outlet is sent goes out the large 0.02～0.1atm of atmospheric pressure.
6. electrodes of lithium-ion batteries drying means according to claim 2, it is characterized in that: the port of export of described passage places dew point at the drying shed below-50 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103957735A CN102901338A (en) | 2012-10-18 | 2012-10-18 | Drying method of pole piece for lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103957735A CN102901338A (en) | 2012-10-18 | 2012-10-18 | Drying method of pole piece for lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102901338A true CN102901338A (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103957735A Pending CN102901338A (en) | 2012-10-18 | 2012-10-18 | Drying method of pole piece for lithium ion battery |
Country Status (1)
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| CN (1) | CN102901338A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104138828A (en) * | 2013-05-10 | 2014-11-12 | 杨洪钧 | Electrode plate/battery cell dewatering and drying method and equipment |
| CN105091531A (en) * | 2015-09-11 | 2015-11-25 | 合肥国轩高科动力能源股份公司 | Oven for baking big lithium ion battery pole piece rolls |
| CN106931726A (en) * | 2017-03-23 | 2017-07-07 | 河北工业大学 | A kind of baking drying process of lithium ion battery cell |
| CN107871853A (en) * | 2016-09-22 | 2018-04-03 | 皓智环球有限公司 | The method of dried electrode component |
| CN107871844A (en) * | 2016-09-22 | 2018-04-03 | 皓智环球有限公司 | The method of dried electrode component |
| CN109883143A (en) * | 2018-12-26 | 2019-06-14 | 深圳市卓能新能源股份有限公司 | Lithium battery stoving process |
| CN110676502A (en) * | 2019-09-04 | 2020-01-10 | 广东元电科技有限公司 | Manufacturing method of Bluetooth headset battery |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104138828A (en) * | 2013-05-10 | 2014-11-12 | 杨洪钧 | Electrode plate/battery cell dewatering and drying method and equipment |
| CN105091531A (en) * | 2015-09-11 | 2015-11-25 | 合肥国轩高科动力能源股份公司 | Oven for baking big lithium ion battery pole piece rolls |
| CN107871844B (en) * | 2016-09-22 | 2020-04-24 | 皓智环球有限公司 | Method of drying electrode assembly |
| CN107871853A (en) * | 2016-09-22 | 2018-04-03 | 皓智环球有限公司 | The method of dried electrode component |
| CN107871844A (en) * | 2016-09-22 | 2018-04-03 | 皓智环球有限公司 | The method of dried electrode component |
| JP2019533126A (en) * | 2016-09-22 | 2019-11-14 | ジーアールエスティー・インターナショナル・リミテッド | Method for drying an electrode assembly |
| CN107871853B (en) * | 2016-09-22 | 2021-02-02 | 皓智环球有限公司 | Method of drying electrode assembly |
| CN106931726B (en) * | 2017-03-23 | 2019-03-05 | 河北工业大学 | A kind of baking drying process of lithium ion battery cell |
| CN106931726A (en) * | 2017-03-23 | 2017-07-07 | 河北工业大学 | A kind of baking drying process of lithium ion battery cell |
| CN109883143A (en) * | 2018-12-26 | 2019-06-14 | 深圳市卓能新能源股份有限公司 | Lithium battery stoving process |
| CN109883143B (en) * | 2018-12-26 | 2021-11-05 | 深圳市卓能新能源股份有限公司 | Lithium battery drying process |
| CN110676502A (en) * | 2019-09-04 | 2020-01-10 | 广东元电科技有限公司 | Manufacturing method of Bluetooth headset battery |
| CN110676502B (en) * | 2019-09-04 | 2021-02-02 | 浙江长林电子有限公司 | Manufacturing method of Bluetooth headset battery |
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Application publication date: 20130130 |