CN106123503A - A kind of soft bag lithium ionic cell battery core quick baking technique - Google Patents
A kind of soft bag lithium ionic cell battery core quick baking technique Download PDFInfo
- Publication number
- CN106123503A CN106123503A CN201610722595.0A CN201610722595A CN106123503A CN 106123503 A CN106123503 A CN 106123503A CN 201610722595 A CN201610722595 A CN 201610722595A CN 106123503 A CN106123503 A CN 106123503A
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- Prior art keywords
- battery core
- soft bag
- lithium ionic
- ionic cell
- bag lithium
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B7/00—Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B3/00 and F26B5/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a kind of soft bag lithium ionic cell battery core quick baking technique, battery core put in hot spreader bar and carry out hot pressing baking, temperature is 80 95 DEG C, and the time is 20 50min, and monomer battery core face pressure is 0.2 0.5Mpa；Battery core is put into the vacuum drying oven being warming up to 80 95 DEG C the most in advance again, is evacuated to after below 0.099Mpa keeps 20 50min, be filled with after nitrogen keeps 10 20min, then be evacuated to after below 0.099Mpa keeps 20 50min, be re-filled with nitrogen ...；Repeat the process 23 times of evacuation, inflated with nitrogen；It is evacuated to below 0.099Mpa, stops heating, be cooled to less than 45 DEG C to vacuum oven temperature, again after inflated with nitrogen, take out battery core.Baking time of the present invention is short, go that moisture removal is effective, production efficiency is high, energy consumption is low, production cost is low.
Description
Technical field
The invention belongs to the manufacturing field of lithium ion battery, relate to a kind of lithium ion battery cell baking process.
Background technology
Along with the intensified competition of flexible packing lithium ion battery industry, conventional soft bag lithium ionic cell has been enter into Competition turn white
Stage.The competition of each enterprise comes into the low profit competition epoch of cost, efficiency competition.
In the production process of lithium ion battery, the baking of battery core is very important operation, and the purpose of this operation is to remove
Moisture present in battery core, prevents potential safety hazard.Current general battery core baking process is to dry 24-at 80 DEG C in vacuum drying oven
36 hours, nitrogen of displacement in every 2～3 hours.Owing to the part temperatures such as barrier film are high yielding, so, it is impossible to use and be higher than
The temperature of 100 DEG C.Existing production efficiency is low, power consumption height, and production cost is high, and owing to baking time is long, there is barrier film and receive
Contracting, porosity reduction etc. cause the risk that battery performance declines.
Summary of the invention
The purpose of the present invention solves the above-mentioned problems in the prior art exactly, it is provided that a kind of baking time is short, removal
The soft bag lithium ionic cell battery core quick baking technique that moisture is effective, production efficiency is high, energy consumption is low, production cost is low.
For achieving the above object, the technical solution of the present invention is: a kind of soft bag lithium ionic cell battery core quick baking
Technique, it comprises the following steps: all operations is all carried out in the case of envionmental humidity is maintained at below 3%,
(1) putting into battery core can heat in the hot spreader bar of pressurization and carry out hot pressing baking, heating-up temperature is 80-95 DEG C, during heating
Between be 20-50min, monomer battery core face pressure is for 0.2-0.5Mpa；
(2) battery core after hot pressing being toasted puts into the vacuum drying oven being warming up to 80-95 DEG C the most in advance, keeps this temperature and carries out
Below operation: after being evacuated to below-0.099Mpa holding 20-50min, after being filled with nitrogen holding 10-20min, then evacuation
After keeping 20-50min to below-0.099Mpa, it is re-filled with nitrogen ...；Repeat process 2-3 time of evacuation, inflated with nitrogen；
(3) vacuum drying oven is evacuated to below-0.099Mpa, stops heating, be cooled to less than 45 DEG C to vacuum oven temperature,
Again take out battery core after inflated with nitrogen.
It is further preferred that hot pressing baking temperature is 85 DEG C in described step (1).
It is further preferred that hot pressing baking time is 30min in described step (1).
It is further preferred that hot pressing monomer battery core face pressure is 0.3Mpa in described step (1).
It is further preferred that vacuum drying oven keeps vacuum time to be 20min in described step (2).
It is further preferred that the hot spreader bar used in described step (1) includes the hot flat clamp with electric heating function
With there is the cylinder of pressurization function, this device is for carrying out hot pressing shaping, in the art to the core of lithium ion battery now
Using it for battery core heating pressurization, in which ensure that battery core, pole piece is brought rapidly up.Described hot spreader bar may be used without other can
The hot-press equipment of heating pressurization.
The invention has the beneficial effects as follows: (1) present invention uses hot spreader bar to heat battery core, and in can making battery core, pole piece rises rapidly
Temperature is to technological temperature, and programming rate is fast, and baking time is short；(2) present invention is directly placed into warmed up vacuum by after battery core hot pressing
Evacuation in baking oven, can be filled with nitrogen in time by thorough for the moisture removal of discharge, carry in time also for by the moisture of discharge
Go out, to reduce baking time.In a word, baking time of the present invention is short, and baking time can foreshorten to 2-5 hour, goes moisture removal effect
Good, improve production efficiency, reduce energy consumption, thus reduce production cost；And due to the shortening of baking time, be substantially reduced
Diaphragm retracts, porosity reduction etc. cause the risk that battery performance declines, and do not damage battery quality.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described.
Embodiment 1, a kind of soft bag lithium ionic cell battery core quick baking technique, it comprises the following steps: all operations is equal
Carry out in the case of envionmental humidity is maintained at below 3%,
(1) take two soft bag lithium ionic cell battery cores, put into heat and carry out hot pressing baking on the hot spreader bar flat board of pressurization,
Heating-up temperature is 95 DEG C, and heat time heating time is 50min, and monomer battery core face pressure is 0.5Mpa；
Hot spreader bar includes having the hot flat clamp of electric heating function and have the cylinder of pressurization function, and this device is for right now
The core of lithium ion battery carries out hot pressing shaping.May be used without other hot-press equipment that can heat pressurization.
(2) battery core after hot pressing being toasted puts into the vacuum drying oven being warming up to 95 DEG C the most in advance, keeps this temperature to go forward side by side
The following operation of row: after being evacuated to below-0.099Mpa holding 50min, after being filled with nitrogen holding 20min, then be evacuated to-
After below 0.099Mpa keeps 50min, it is re-filled with nitrogen, after keeping 20min, then is evacuated to below-0.099Mpa holding
After 50min, it is re-filled with nitrogen, keeps 20min；
(3) vacuum drying oven is evacuated to below-0.099Mpa, stops heating, be cooled to less than 45 DEG C to vacuum oven temperature,
Again take out battery core after inflated with nitrogen.
Battery core tests the moisture of battery core pole piece after going out baking oven, test result is: positive plate: 158ppm, negative plate:
364ppm；Due to the shortening of baking time, greatly reduce the wind that diaphragm retracts, porosity reduction etc. cause battery performance to decline
Danger.
Embodiment 2, a kind of soft bag lithium ionic cell battery core quick baking technique, it comprises the following steps: all operations is equal
Carry out in the case of envionmental humidity is maintained at below 3%,
(1) take two soft bag lithium ionic cell battery cores, put into heat and carry out hot pressing baking on the hot spreader bar flat board of pressurization,
Heating-up temperature is 80 DEG C, and heat time heating time is 20min, and monomer battery core face pressure is 0.2Mpa；
(2) battery core after hot pressing being toasted is put into and is warming up to the vacuum drying oven of 80 DEG C the most in advance, keep this temperature and carry out with
Lower operation: after being evacuated to below-0.099Mpa holding 20min, after being filled with nitrogen holding 10min, then be evacuated to-
After below 0.099Mpa keeps 20min, it is re-filled with nitrogen, after keeping 10min；
(3) vacuum drying oven is evacuated to below-0.099Mpa, stops heating, be cooled to less than 45 DEG C to vacuum oven temperature,
Again take out battery core after inflated with nitrogen.
Battery core tests the moisture of battery core pole piece after going out baking oven, test result is: positive plate: 182ppm, negative plate:
420ppm；Due to the shortening of baking time, greatly reduce the wind that diaphragm retracts, porosity reduction etc. cause battery performance to decline
Danger.
Embodiment 3, a kind of soft bag lithium ionic cell battery core quick baking technique, it comprises the following steps: all operations is equal
Carry out in the case of envionmental humidity is maintained at below 3%,
(1) take two soft bag lithium ionic cell battery cores, put into heat and carry out hot pressing baking on the hot spreader bar flat board of pressurization,
Heating-up temperature is 85 DEG C, and heat time heating time is 30min, and monomer battery core face pressure is 0.3Mpa；
(2) battery core after hot pressing being toasted is put into and is warming up to the vacuum drying oven of 85 DEG C the most in advance, keep this temperature and carry out with
Lower operation: after being evacuated to below-0.099Mpa holding 40min, after being filled with nitrogen holding 15min, then be evacuated to-
After below 0.099Mpa keeps 40min, it is re-filled with nitrogen, after keeping 15min, then is evacuated to below-0.099Mpa holding
After 40min, it is re-filled with nitrogen, keeps 15min；
(3) vacuum drying oven is evacuated to below-0.099Mpa, stops heating, be cooled to less than 45 DEG C to vacuum oven temperature,
Again take out battery core after inflated with nitrogen.
Battery core tests the moisture of battery core pole piece after going out baking oven, test result is: positive plate: 165ppm, negative plate:
388ppm；Due to the shortening of baking time, greatly reduce the wind that diaphragm retracts, porosity reduction etc. cause battery performance to decline
Danger.
Embodiment 4, a kind of soft bag lithium ionic cell battery core quick baking technique, it comprises the following steps: all operations is equal
Carry out in the case of envionmental humidity is maintained at below 3%,
(1) take two soft bag lithium ionic cell battery cores, put into heat and carry out hot pressing baking on the hot spreader bar flat board of pressurization,
Heating-up temperature is 90 DEG C, and heat time heating time is 40min, and monomer battery core face pressure is 0.2Mpa；
(2) battery core after hot pressing being toasted is put into and is warming up to the vacuum drying oven of 80 DEG C the most in advance, keep this temperature and carry out with
Lower operation: after being evacuated to below-0.099Mpa holding 30min, after being filled with nitrogen holding 10min, then be evacuated to-
After below 0.099Mpa keeps 30min, it is re-filled with nitrogen, after keeping 10min, then is evacuated to below-0.099Mpa holding
After 30min, it is re-filled with nitrogen, keeps 10min；
(3) vacuum drying oven is evacuated to below-0.099Mpa, stops heating, be cooled to less than 45 DEG C to vacuum oven temperature,
Again take out battery core after inflated with nitrogen.
Battery core tests the moisture of battery core pole piece after going out baking oven, test result is: positive plate: 165ppm, negative plate:
388ppm；Due to the shortening of baking time, greatly reduce the wind that diaphragm retracts, porosity reduction etc. cause battery performance to decline
Danger.
Comparative example:
Take two soft bag lithium ionic cell battery cores, put in vacuum drying oven, vacuum drying oven is heated, heating-up temperature 80 DEG C,
Temperature is evacuated to below-0.095Mpa after reaching, heating in vacuum keeps 3h, and then inflated with nitrogen keeps 10min.Carry out the most again
Being evacuated to below-0.095Mpa, heating in vacuum keeps 3h, and inflated with nitrogen keeps 10min the most again.Circulation 8 times, always toast successively
Time controls at 24-26h, is finally evacuated to below 0.095Mpa, closes heating, treats that vacuum drying oven is cooled to less than 45 DEG C,
Battery core goes out baking oven.
Battery core tests the moisture of battery core pole piece after going out baking oven, test result is: positive plate: 165ppm, negative plate:
372ppm。
This technique baking time length, production efficiency are low, and energy consumption is high, and owing to baking time is long so that diaphragm retracts, hole
The risk that rate reduction etc. causes battery performance to decline is bigger.
Above-described embodiment is only preferred and exemplary, and those skilled in the art can be carried out according to the description of this patent
The improvement of equivalent technologies, it is all in the protection domain of this patent.
Claims (10)
1. a soft bag lithium ionic cell battery core quick baking technique, it is characterised in that: it comprises the following steps: all operations is equal
Carry out in the case of envionmental humidity is maintained at below 3%,
(1) putting into battery core can heat in the hot spreader bar of pressurization and carry out hot pressing baking, heating-up temperature is 80-95 DEG C, during heating
Between be 20-50min, monomer battery core face pressure is for 0.2-0.5Mpa；
(2) battery core after hot pressing being toasted puts into the vacuum drying oven being warming up to 80-95 DEG C the most in advance, keeps this temperature and carries out
Below operation: after being evacuated to below-0.099Mpa holding 20-50min, after being filled with nitrogen holding 10-20min, then evacuation
After keeping 20-50min to below-0.099Mpa, it is re-filled with nitrogen ...；Repeat process 2-3 time of evacuation, inflated with nitrogen；
(3) vacuum drying oven is evacuated to below-0.099Mpa, stops heating, be cooled to less than 45 DEG C to vacuum oven temperature,
Again take out battery core after inflated with nitrogen.
Soft bag lithium ionic cell battery core quick baking technique the most according to claim 1, it is characterised in that: described step
(1) in, hot pressing baking temperature is 85 DEG C.
Soft bag lithium ionic cell battery core quick baking technique the most according to claim 1 and 2, it is characterised in that: described step
Suddenly in (1), hot pressing baking time is 30min.
Soft bag lithium ionic cell battery core quick baking technique the most according to claim 3, it is characterised in that: described step
(1) in, hot pressing monomer battery core face pressure is 0.3Mpa.
Soft bag lithium ionic cell battery core quick baking technique the most according to claim 4, it is characterised in that: described step
(2) in, vacuum drying oven keeps vacuum time to be 20min.
Soft bag lithium ionic cell battery core quick baking technique the most according to claim 5, it is characterised in that: described step
(1) the hot spreader bar used in includes having the hot flat clamp of electric heating function and have the cylinder of pressurization function.
Soft bag lithium ionic cell battery core quick baking technique the most according to claim 1 and 2, it is characterised in that: described step
Suddenly in (1), hot pressing monomer battery core face pressure is 0.3Mpa.
Soft bag lithium ionic cell battery core quick baking technique the most according to claim 7, it is characterised in that: described step
(2) in, vacuum drying oven keeps vacuum time to be 20min.
Soft bag lithium ionic cell battery core quick baking technique the most according to claim 8, it is characterised in that: described step
(1) the hot spreader bar used in includes having the hot flat clamp of electric heating function and have the cylinder of pressurization function.
Soft bag lithium ionic cell battery core quick baking technique the most according to claim 3, it is characterised in that: described step
(2) in, vacuum drying oven keeps vacuum time to be 20min.
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| CN201610722595.0A CN106123503B (en) | 2016-08-25 | 2016-08-25 | A kind of soft bag lithium ionic cell battery core quick baking technique |
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| CN201610722595.0A CN106123503B (en) | 2016-08-25 | 2016-08-25 | A kind of soft bag lithium ionic cell battery core quick baking technique |
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| CN106123503B CN106123503B (en) | 2019-01-15 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106816638A (en) * | 2017-03-02 | 2017-06-09 | 北京新能源汽车股份有限公司 | A kind of baking method and soft bag lithium ionic cell of Soft Roll lithium-ion electric core |
| 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 |
| CN106981685A (en) * | 2016-12-11 | 2017-07-25 | 长兴天晟能源科技有限公司 | A kind of lithium ion cell electrode piece baking process containing aqueous binders |
| CN107356053A (en) * | 2017-07-20 | 2017-11-17 | 深圳市鑫承诺环保产业股份有限公司 | The super drying process of new energy battery |
| CN108376802A (en) * | 2018-02-05 | 2018-08-07 | 东莞市德瑞精密设备有限公司 | A kind of battery drying means |
| CN109119695A (en) * | 2018-08-25 | 2019-01-01 | 浙江谷神能源科技股份有限公司 | A kind of big cylinder lithium-ion electric core baking method |
| CN109489346A (en) * | 2018-09-19 | 2019-03-19 | 多氟多（焦作）新能源科技有限公司 | A kind of baking method of lithium ion battery cell |
| CN110849077A (en) * | 2019-12-06 | 2020-02-28 | 惠州市华维机电设备有限公司 | Constant-temperature contact type rapid baking device and process |
| CN111403689A (en) * | 2020-03-31 | 2020-07-10 | 上海电气集团股份有限公司 | Baking method for oil-type negative electrode plate of lithium ion battery |
| CN111998628A (en) * | 2020-08-24 | 2020-11-27 | 江西安驰新能源科技有限公司 | Battery cell baking box body and baking method |
| CN112595035A (en) * | 2020-12-07 | 2021-04-02 | 山东天瀚新能源科技有限公司 | Efficient baking method for lithium ion battery roll core |
| CN114204126A (en) * | 2021-11-10 | 2022-03-18 | 安徽南都华拓新能源科技有限公司 | Permeable baking method for lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106981685A (en) * | 2016-12-11 | 2017-07-25 | 长兴天晟能源科技有限公司 | A kind of lithium ion cell electrode piece baking process containing aqueous binders |
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| CN109119695A (en) * | 2018-08-25 | 2019-01-01 | 浙江谷神能源科技股份有限公司 | A kind of big cylinder lithium-ion electric core baking method |
| CN109489346A (en) * | 2018-09-19 | 2019-03-19 | 多氟多（焦作）新能源科技有限公司 | A kind of baking method of lithium ion battery cell |
| CN110849077A (en) * | 2019-12-06 | 2020-02-28 | 惠州市华维机电设备有限公司 | Constant-temperature contact type rapid baking device and process |
| CN111403689A (en) * | 2020-03-31 | 2020-07-10 | 上海电气集团股份有限公司 | Baking method for oil-type negative electrode plate of lithium ion battery |
| CN111998628A (en) * | 2020-08-24 | 2020-11-27 | 江西安驰新能源科技有限公司 | Battery cell baking box body and baking method |
| CN112595035A (en) * | 2020-12-07 | 2021-04-02 | 山东天瀚新能源科技有限公司 | Efficient baking method for lithium ion battery roll core |
| CN114204126A (en) * | 2021-11-10 | 2022-03-18 | 安徽南都华拓新能源科技有限公司 | Permeable baking method for lithium ion battery |
| CN114204126B (en) * | 2021-11-10 | 2024-03-29 | 安徽南都华拓新能源科技有限公司 | Penetrating type baking method for lithium ion battery |
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