CN104197640A - Drying method of energy storage device pole piece - Google Patents
Drying method of energy storage device pole piece Download PDFInfo
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- CN104197640A CN104197640A CN201410408458.0A CN201410408458A CN104197640A CN 104197640 A CN104197640 A CN 104197640A CN 201410408458 A CN201410408458 A CN 201410408458A CN 104197640 A CN104197640 A CN 104197640A
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Abstract
The invention discloses a baking method of an energy storage device pole piece. The method comprises the steps of pole piece baking and moisture testing and is characterized in that the pole piece baking step is that a gas drying system and a gas heating system are combined, gas dried by the gas drying system is directly led into a baking device in the gas heating system in the pole piece baking process, wind quantity, wind direction, temperature and wind pressure for dried gas leading are controlled, and baking and drying of the energy storage device pole piece are simultaneously performed after the baking time is set. After the baking is finished by means of the backing technology, the pole piece moisture requirement after baking by means of a traditional oven is already met, a baking period ranging 10 hours to 20 hours is shortened, fixed assets for the oven are decreased, resource waste during the backing of the oven is reduced, and the production cost is reduced. In addition, badness caused by uneven stress release during traditional pole piece baking is eliminated, the product quality is improved, and the percent of pass is improved.
Description
Technical field
The present invention relates to a kind of drying means of energy storage device pole piece, belong to energy storage device technical field.
Background technology
Energy storage device pole piece in process of production, requires very strictly to the control of moisture, if contained moisture is higher in pole piece, tests or discharge and recharge, easy aerogenesis in cyclic process, and deliquescing, affects performance and the life-span of energy storage device.How to control moisture and become a very important link in production process.The method of removing moisture is baking, still, when toasts end, is but a problem, we must know that, in which type of situation, pole piece moisture does not toast complete, must continue baking, in which type of situation, the water content in pole piece has reached technological requirement, can finish baking.Common way is to take out a pole piece after baking, to moisture tester, tests, and judges whether to reach requirement according to test result.Need cooling but take out pole piece from roasting plant, generally need 8-10H, moisture is not up to standard need to be toasted again, cooling test moisture again, and resource, time waste are large, very inconvenient.
The pole piece of energy storage device all uses common gases to toast in roasting plant bake process at present, pole piece moisture in film-making process after first baking is still higher than allowing to use content, need to use in addition vacuum bakeout equipment to toast after film-making completes, every produce line all need to configure several even tens roasting plants pole piece is carried out inflated with nitrogen, vacuumizes baking 10-20 hour, the 8-10H that lowers the temperature again, to remove the moisture in pole piece.Baking cycle is long, and production efficiency is low, and the waste of resource energy consumption is large, and production cost is high.
Summary of the invention
The object of the invention is to, for deficiency of the prior art, provides a kind of baking method of energy storage device pole piece, shortens the baking cycle of 10～30 hours, reduces the input of baking box fixed assets, reduces the wasting of resources during baking box toasts, and reduces production costs.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of baking method of energy storage device pole piece, comprise pole piece baking and moisture measurement step, its innovative point is: the baking procedure in described film-making process is for to combine gas-drying system with gas heating system, in the time of film-making bake process, in roasting plant in gas heating system, directly pass into the dried gas of gas-drying system, and control the air quantity that dry gas passes into, wind direction, temperature and blast, arrange after baking time, carry out continuously the baking of energy storage device pole piece and be dried, after baking, pole piece moisture meet instructions for use, do not need to use in addition vacuum bakeout equipment to toast.
Further, the concrete steps of described pole piece baking procedure are as follows:
(1) in pole piece manufacturing process;
(2) pass into the dry gas that toasts use, the air quantity that dry gas is set is 1～100L/min, and wind direction is perpendicular to 15～90 °, pole piece surface, and temperature is 50～200 DEG C, and blast is 10～1000kpa;
(3), in the time that pole piece moisture reaches technological requirement value, can produce normally; When moisture is during higher than technological requirement value, on the basis of step (2), retest moisture, until moisture meets technological requirement.
Further, described dry gas is the dry gas of drying nitrogen, dry air or the output of industrial dehumidifier.
Further, the moisture of described dry gas is 50～300ppm.
Further, described gas-drying system comprises the gas transmission pipeline after dehumidification equipment and dehumidifying, and dehumidification equipment is connected with gas heating system by the gas transmission pipeline after dehumidifying.
Further, described gas heating system comprises roasting plant, one or more roasting plant air inlet duct, one or more roasting plant return air duct and main return air duct;
Described roasting plant lower end connects one or more roasting plant air inlet duct, and roasting plant upper end connects one or more roasting plant return air duct;
Described one or more roasting plant return air duct end collects and becomes owner of return air duct;
Described gas heating system is connected with gas-drying system by main return air duct.
Further, in gas-drying system, also include new wind supply pipeline; Described new wind supply pipeline access in parallel with main return air duct gas-drying system.
Beneficial effect of the present invention is as follows:
(1) baking technology of the present invention, pole piece toasts 1-2h and can reach the cured effect of current normal process 10～20h continuously at roasting plant, and there is no traditional intensification temperature-fall period, shorten the baking cycle of 10～30 hours, pole piece can dry and use, mate according to production capacity, the input of roasting plant fixed assets is 1/5～1/15 of traditional baking process, reduce the water, electricity, gas during toasting, artificial cost waste, reduce production costs, eliminate bad that stress release inequality causes during pole piece tradition baking simultaneously, improve the quality of products, promote qualification rate.
(2) the present invention is by using dry gas in pole piece bake process, and meet technological requirement value by the air quantity, wind direction, temperature, blast etc. of controlling dry gas to ensure the dry pole piece moisture of energy storage device, cancel the baking condition requirement of traditional energy storage device pole piece complexity after coating, reduced the operating time.
(3) method of the present invention, for the dry processing to energy storage device pole piece, can be simplified production process operation, and process for stabilizing condition, increases work efficiency, and reduces fixed loss, reduces production costs.
(4) method of the present invention combines gas-drying system with gas heating system, recycles according to above process, recycles the energy, reaches energy-saving and emission-reduction, environmental friendly regenerated effect.
brief description of the drawings
Be further detailed by the drawings and specific embodiments.
Fig. 1 is the overall structure schematic diagram that the embodiment of the present invention 1 gas-drying system combines with gas heating system.
Fig. 2 is the overall structure schematic diagram that the embodiment of the present invention 3 gas-drying systems combine with gas heating system.
Detailed description of the invention
Below in conjunction with specific embodiment, technical scheme of the present invention is elaborated.
Embodiment 1
A kind of baking method of energy storage device pole piece: be mainly to combine with gas heating system by gas-drying system, complete baking and the drying process of pole piece simultaneously.
Wherein, gas-drying system comprises the gas transmission pipeline 6 after dehumidification equipment 1 and dehumidifying, and dehumidification equipment 1 is connected with gas heating system by the gas transmission pipeline 6 after dehumidifying;
As shown in Figure 1, gas heating system comprises roasting plant 8, three roasting plant air inlet duct 5, two roasting plant return air ducts 4 and main return air ducts 3, roasting plant 8 lower ends connect three roasting plant air inlet duct 5, and roasting plant 8 upper ends connect two roasting plant return air ducts 4; Two roasting plant return air duct 4 ends collect and become owner of return air duct 3, and gas heating system is connected with gas-drying system by main return air duct 3.
Use flow process: the present embodiment combines with gas heating system by gas-drying system, and gas is dried, and makes its moisture be reduced to 50～300ppm, by roasting plant air inlet duct 5, the gas after removal moisture drying is delivered to roasting plant 8; Roasting plant return air duct 4 is by the extremely main return air duct 3 of gas collection participating in after baking, main return air duct 3 must have the gas after baking by filtration, non-this technology of retracting device 2(, can select according to thing situation) deliver to dehumidification equipment 1 and process, gas after dehumidification treatments is again delivered to roasting plant 8 by the gas transmission pipeline 6 after dehumidifying and is participated in baking, recycles according to above process.
The concrete steps of pole piece baking procedure are as follows:
(1) coated pole piece is put into roasting plant preparation baking;
(2) pass into the removal moisture drying of baking use after moisture be reduced to the dry gas of 150ppm, the air quantity that dry gas is set is 50L/min, and wind direction is that temperature is 130 DEG C perpendicular to 40 °, pole piece surface, blast is 560kpa, and pole piece unwinding and rewinding on one side complete baking on one side;
(3), when pole piece moisture reaches technological requirement value, can produce normally.
The method pole piece of the present embodiment can reach the cured effect of current normal process 10～20h at the continuous baking of roasting plant 1～2h, and there is no traditional intensification temperature-fall period, shorten the baking cycle of 10～30 hours, pole piece can dry and use, mate according to production capacity, the input of roasting plant fixed assets is 1/5～1/15 of traditional baking process, reduce the water, electricity, gas during toasting, artificial cost waste, reduce production costs, eliminate bad that stress release inequality causes during pole piece tradition baking simultaneously, improve the quality of products, promote qualification rate.
Embodiment 2
As shown in Figure 2, on the basis of embodiment 1, in gas-drying system, also include new wind supply pipeline 7; New wind supply pipeline 7 and main return air duct 3 access in parallel gas-drying system.
The present embodiment accesses new wind supply pipeline in gas-drying system, and in the time that back of pipeline air quantity can not meet instructions for use, by carrying out gas supply, cured effect is improved.
Claims (7)
1. the baking method of an energy storage device pole piece, comprise pole piece baking and moisture measurement step, it is characterized in that: described pole piece baking procedure is for to combine gas-drying system with gas heating system, in the time that pole piece carries out bake process, in roasting plant in gas heating system, directly pass into the dried gas of gas-drying system, and control air quantity, wind direction, temperature and the blast that dry gas passes into, carry out continuously the baking of energy storage device pole piece and be dried.
2. the baking method of energy storage device pole piece according to claim 1, is characterized in that: the concrete steps of described pole piece baking procedure are as follows:
The pole piece making is put into roasting plant preparation baking;
The dry gas that passes into baking use, the air quantity that dry gas is set is 1～100L/min, and wind direction is perpendicular to 15～90 °, pole piece surface, and temperature is 50～200 DEG C, and blast is 10～1000kpa;
In the time that pole piece moisture reaches technological requirement value, can produce normally; When moisture is during higher than technological requirement value, on the basis of step (2), adjust parameter, retest moisture, until moisture meets technological requirement.
3. the baking method of energy storage device pole piece according to claim 1, is characterized in that: described dry gas is the dry gas of drying nitrogen, dry air or the output of industrial dehumidifier.
4. the baking method of energy storage device pole piece according to claim 1, is characterized in that: the moisture of described dry gas is 50～300ppm.
5. the baking method of energy storage device pole piece according to claim 1, it is characterized in that: described gas-drying system comprises the gas transmission pipeline after dehumidification equipment and dehumidifying, dehumidification equipment is connected with gas heating system by the gas transmission pipeline after dehumidifying.
6. the baking method of energy storage device pole piece according to claim 1, is characterized in that: described gas heating system comprises roasting plant, one or more roasting plant air inlet duct, one or more roasting plant return air duct and main return air duct;
Described roasting plant lower end connects one or more roasting plant air inlet duct, and roasting plant upper end connects one or more roasting plant return air duct;
Described one or more roasting plant return air duct end collects and becomes owner of return air duct;
Described gas heating system is connected with gas-drying system by main return air duct.
7. the baking method of energy storage device pole piece according to claim 5, is characterized in that: in gas-drying system, also include new wind supply pipeline; Described new wind supply pipeline access in parallel with main return air duct gas-drying system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410408458.0A CN104197640A (en) | 2014-08-19 | 2014-08-19 | Drying method of energy storage device pole piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410408458.0A CN104197640A (en) | 2014-08-19 | 2014-08-19 | Drying method of energy storage device pole piece |
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| CN104197640A true CN104197640A (en) | 2014-12-10 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4154692B2 (en) * | 2003-06-05 | 2008-09-24 | 富士フイルム株式会社 | Coating film drying equipment |
| CN102423749A (en) * | 2011-12-27 | 2012-04-25 | 深圳市赢合科技股份有限公司 | Pole piece drying system of pole piece coating machine |
| CN102620543A (en) * | 2012-04-16 | 2012-08-01 | 惠州市博能新能源有限公司 | Drying system for lithium ion battery cores |
| US20130244104A1 (en) * | 2012-03-15 | 2013-09-19 | Hitachi, Ltd. | Method for producing nonaqueous secondary battery electrode, nonaqueous secondary battery, and drying device |
| CN203304152U (en) * | 2013-05-10 | 2013-11-27 | 杨洪钧 | Electrode slice/battery cell dehydration drying device |
| CN203443311U (en) * | 2013-09-04 | 2014-02-19 | 张利华 | Waste gas treatment and heat recovery system for hot air drying device |
| CN103785599A (en) * | 2013-12-18 | 2014-05-14 | 陈佩 | Water-removing and drying equipment and water-removing and drying method for electrode plates/battery cells |
| CN203635455U (en) * | 2013-12-18 | 2014-06-11 | 陈佩 | Electrode plate/battery core dehydration and drying equipment |
-
2014
- 2014-08-19 CN CN201410408458.0A patent/CN104197640A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4154692B2 (en) * | 2003-06-05 | 2008-09-24 | 富士フイルム株式会社 | Coating film drying equipment |
| CN102423749A (en) * | 2011-12-27 | 2012-04-25 | 深圳市赢合科技股份有限公司 | Pole piece drying system of pole piece coating machine |
| US20130244104A1 (en) * | 2012-03-15 | 2013-09-19 | Hitachi, Ltd. | Method for producing nonaqueous secondary battery electrode, nonaqueous secondary battery, and drying device |
| CN102620543A (en) * | 2012-04-16 | 2012-08-01 | 惠州市博能新能源有限公司 | Drying system for lithium ion battery cores |
| CN203304152U (en) * | 2013-05-10 | 2013-11-27 | 杨洪钧 | Electrode slice/battery cell dehydration drying device |
| CN203443311U (en) * | 2013-09-04 | 2014-02-19 | 张利华 | Waste gas treatment and heat recovery system for hot air drying device |
| CN103785599A (en) * | 2013-12-18 | 2014-05-14 | 陈佩 | Water-removing and drying equipment and water-removing and drying method for electrode plates/battery cells |
| CN203635455U (en) * | 2013-12-18 | 2014-06-11 | 陈佩 | Electrode plate/battery core dehydration and drying equipment |
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Application publication date: 20141210 |