CN114659341B - Control method for baking lithium ion battery - Google Patents
Control method for baking lithium ion battery Download PDFInfo
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- CN114659341B CN114659341B CN202210199545.4A CN202210199545A CN114659341B CN 114659341 B CN114659341 B CN 114659341B CN 202210199545 A CN202210199545 A CN 202210199545A CN 114659341 B CN114659341 B CN 114659341B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/042—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying articles or discrete batches of material in a continuous or semi-continuous operation, e.g. with locks or other air tight arrangements for charging/discharging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/003—Handling, e.g. loading or unloading arrangements for articles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
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- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- 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
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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
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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
- 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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Abstract
The invention relates to a control method for baking a lithium ion battery, which comprises the following steps: s1: determining a function of pressure rise of the baking equipment caused by leakage, namely a leakage function of the baking equipment; s2: setting a plurality of parameters of a vacuum baking process, placing the battery in baking equipment for vacuum baking, and acquiring a function of pressure rise of the battery due to moisture evaporation in the vacuum baking process, namely a moisture evaporation function, in real time according to the leakage function; s3: judging whether the baking stopping condition is reached according to the water evaporation function, and ending the baking when the baking stopping condition is reached. Compared with the prior art, the method avoids the problem of low efficiency caused by the fact that leakage of baking equipment and operation of each process step is controlled by time are not considered in the prior art.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a control method for baking a lithium ion battery.
Background
In the manufacturing process of the lithium ion battery, the electric core is required to be subjected to vacuum baking and dewatering operation, and the water content in the electric core is removed to be within a qualified range. The baking is mainly to evaporate the water in the battery into water vapor, the boiling point of the water is reduced in a mode of reducing the air pressure, and the evaporation efficiency of the water is improved in a heating mode. There are three main aspects affecting the efficiency of water evaporation: temperature, pressure and moisture content. Because of the limitation of the components of the lithium battery, a certain upper limit exists on the temperature, and the temperature cannot be continuously increased. Similarly, because of environmental, equipment and production efficiency limitations, there is a certain lower limit on pressure, and the infinite pursuit of low pressure can greatly reduce production efficiency. So that the baking efficiency is improved from the aspect of the moisture content.
The existing baking method carries out corresponding control and action on baking equipment through program setting time, and the whole method sequentially comprises the following steps: beginning baking, preheating the battery, baking under vacuum and ending baking.
The pressure change curve in the vacuum baking process is shown in fig. 1, and the vacuum baking conditions are set as follows: the lower limit is 100pa and the upper limit is 300pa. And stopping vacuumizing when vacuumizing to 100Pa, keeping the vacuum state, baking, opening a vacuum pipeline when evaporating water and increasing the pressure to 300Pa, stopping vacuumizing when vacuumizing the vacuum pipeline to 100Pa, repeating the steps until the set vacuum baking time is reached, and pumping a certain amount of nitrogen for baking the set time.
In the vacuum baking process, after the pressure reaches the set upper limit, vacuum is extracted to the set lower limit, and then baking is continued, wherein the moisture content proportion in the cavity of the baking equipment is not reduced in the process, so that the moisture evaporation efficiency is affected.
The existing baking method also has the following problems:
(1) In the battery preheating process, the common preheating time is 1-2 hours, the preheating time is too long, the production efficiency is low, and in the battery preheating process, the gas in the baking box body is heated and expanded, the pressure in the cavity is increased, the water evaporation speed is slowed down, and the baking efficiency of the lithium ion battery is reduced.
(2) The existing baking method mainly controls the operation of each process step through time, and operates the next program action after the set time is reached. The action is controlled purely by means of program time, cannot be controlled intelligently according to the water content of the battery and the change trend of the baking pressure, consumes time and cost and is low in efficiency.
(3) The existing baking method does not consider the equipment leakage rate, consumes time and cost, has low efficiency and poor product consistency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a control method for baking a lithium ion battery, which solves the problem of low efficiency caused by the fact that leakage of baking equipment and operation of each step is controlled by passing time are not considered in the prior art.
The aim of the invention can be achieved by the following technical scheme:
the invention provides a control method for baking a lithium ion battery, which comprises the following steps:
s1: determining a function of pressure rise of the baking equipment caused by leakage, namely a leakage function of the baking equipment;
s2: setting a plurality of control parameters in the vacuum baking process, placing the battery in baking equipment for vacuum baking, controlling the process steps in the vacuum baking process based on the control parameters, and simultaneously acquiring a function of pressure rise of the battery due to moisture evaporation in the vacuum baking process, namely a moisture evaporation function, in real time according to the leakage function;
s3: judging whether the baking stopping condition is reached according to the water evaporation function, and ending the baking if the baking stopping condition is reached.
Preferably, the parameters include a final vacuum pressure, an upper vacuum level pressure, a lower vacuum level pressure, a drying pressure, a termination time, a baking temperature, and an upper evacuation time limit.
Preferably, the S1 specifically is:
for the baking equipment used for the first time, placing the baking equipment used for the first time under an empty load condition, vacuumizing the cavity of the baking equipment, enabling the air pressure in the cavity to reach the ultimate vacuum pressure, closing all valves and switches of the baking equipment, enabling the baking equipment to keep a sealing state, collecting pressure data of all moments from the ultimate vacuum pressure to the upper limit pressure of the vacuum degree in the baking equipment under the sealing state, storing all the pressure data to a computer, and determining a leakage function according to all the pressure data by the computer.
Preferably, the process of determining the leakage function from all pressure data by the computer is in particular:
collecting pressure data of each moment from the ultimate vacuum pressure to the upper limit pressure of the vacuum degree in the baking equipment in an idle and sealed state, and further acquiring an initial pressure rising function;
deriving the initial pressure rising function, and obtaining a pressure rising rate function at each moment;
and converting the function of the rising rate of the pressure into the function of the rising rate of the pressure changing along with the pressure by an inverse function, and integrating the function of the rising rate of the pressure changing along with the pressure to obtain a leakage function.
Preferably, the S2 specifically is:
placing the battery in a baking device for vacuum baking, automatically introducing inert gas or dry gas into the cavity when the pressure in the cavity of the baking device rises to the upper limit pressure of the vacuum degree in the vacuum baking process, enabling the gas pressure in the cavity to reach the dry pressure, and extracting mixed gas after uniform mixing until the pressure in the cavity falls to the lower limit pressure of the vacuum degree, and continuing baking; when the pressure in the cavity rises to the upper limit pressure of the vacuum degree again, inert gas or dry gas is introduced again, the mixed gas is uniformly mixed and pumped out, and the circulation work is performed;
meanwhile, the function of the pressure rise and time in the cavity of the battery in the vacuum baking process, namely the pressure rise function, is monitored and obtained in real time, and then the water evaporation function is obtained.
Preferably, in the process of extracting the mixed gas until the pressure in the cavity is reduced to the lower limit pressure of the vacuum degree, if the required time exceeds the upper limit of the vacuum pumping time, the leakage amount of the baking equipment is excessive, and the baking equipment is stopped.
Preferably, the formula of calculation of the water evaporation function is:
wherein g (t) is the water evaporation function and f (t) is the pressureThe function of the rise-up is that,
as a function of leakage.
Preferably, the S3 specifically is:
and the computer acquires the pressure generated by the baking moisture evaporation of the battery at the moment according to the moisture evaporation function, and if the pressure generated by the baking moisture evaporation of the battery does not reach the upper limit pressure of the vacuum degree within the set time, the baking is stopped.
Preferably, the gas in the chamber of the baking apparatus is replaced with gas before the step S2.
Preferably, the gas displacement process is specifically:
the battery is placed in the baking equipment, the cavity is vacuumized once, so that the air pressure in the cavity reaches the upper limit pressure of the vacuum degree, baking is performed, inert gas or dry gas is introduced into the cavity, the pressure in the cavity reaches the dry pressure, and the secondary vacuumizing is performed, so that the air pressure in the cavity reaches the lower limit pressure of the vacuum degree, and air replacement in the baking equipment is realized.
Compared with the prior art, the invention has the following advantages:
1. the control method for baking the lithium ion battery provided by the invention determines the leakage function before each vacuum baking, so as to determine the water evaporation function and the baking stopping condition during the baking, and the problem of low baking efficiency caused by the fact that the equipment leakage rate is not considered in the prior art is avoided.
2. According to the control method for baking the lithium ion battery, disclosed by the invention, the baking program action is controlled through the variation trend of the gas pressure in the baking oven cavity, so that the baking actions with different water contents of the battery are automatically adapted to be reasonable, and the baking efficiency is greatly improved.
3. According to the control method for baking the lithium ion battery, provided by the invention, the baking stopping condition is determined by determining the water evaporation function during the baking, so that the problems of insufficient baking or low efficiency caused by controlling the baking stopping through time in the prior art are avoided.
Drawings
FIG. 1 is a schematic diagram of the pressure change in a baking oven during a vacuum baking process according to the prior art;
fig. 2 is a schematic flow chart of a control method for baking a lithium ion battery according to the present embodiment;
fig. 3 is a schematic diagram of a pressure change curve in a baking oven of a control method for baking a lithium ion battery according to the present embodiment.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Examples
Referring to fig. 2, the present embodiment provides a control method for baking a lithium ion battery, including the following steps:
s1: determining a function of pressure rise of the baking equipment caused by leakage, namely a leakage function of the baking equipment;
s2: setting a plurality of parameters in the vacuum baking process, placing the battery in baking equipment for vacuum baking, and acquiring a function of pressure rise of the battery due to moisture evaporation in the vacuum baking process, namely a moisture evaporation function, in real time according to a leakage function;
specifically, the parameters include a limiting vacuum pressure, an upper vacuum level pressure, a lower vacuum level pressure, a drying pressure, a termination time, a baking temperature, and an upper evacuation time.
Specifically, the upper limit pressure of the vacuum degree needs to be set for a plurality of times in the vacuum baking process according to specific conditions, and a plurality of times are set for each time.
Specifically, referring to fig. 3, the battery is placed in a baking device for vacuum baking, when the pressure in the cavity of the baking device rises to the upper limit pressure of the vacuum degree (the high point of a first curve shown in fig. 3) in the vacuum baking process, inert gas or dry gas is automatically introduced into the cavity, so that the gas pressure in the cavity reaches the dry pressure, the mixed gas is pumped out after uniform mixing until the pressure in the cavity falls to the lower limit pressure of the vacuum degree, and the baking is continued; when the pressure in the cavity rises to the upper limit pressure of the vacuum degree again, inert gas or dry gas is introduced again, the mixed gas is uniformly mixed and pumped out, and the circulation work is performed;
specifically, in the process of extracting the mixed gas until the pressure in the cavity is reduced to the lower limit pressure of the vacuum degree, if the required time exceeds the upper limit of the vacuumizing time, the leakage amount of the baking equipment is excessive, and the baking equipment is stopped.
Meanwhile, the function of the pressure rise and time in the cavity of the battery in the vacuum baking process, namely the pressure rise function, is monitored and obtained in real time, and then the water evaporation function is obtained, wherein the calculation formula of the water evaporation function is specifically as follows:
wherein g (t) is a water evaporation function, f (t) is a pressure rising function,
as a function of leakage.
As an alternative embodiment, the lower vacuum pressure is 100Pa and the drying pressure is in the range of 10Kpa to 100Kpa.
Further, before S2, the gas in the cavity of the baking apparatus may be replaced;
the gas displacement process comprises the following steps: placing the battery in a baking device, vacuumizing the cavity once to enable the air pressure in the cavity to reach the upper limit pressure of the vacuum degree, baking, introducing inert gas or dry gas into the cavity to enable the air pressure in the cavity to reach the dry pressure, vacuumizing the cavity twice to enable the air pressure in the cavity to reach the lower limit pressure of the vacuum degree, and realizing air replacement in the baking device;
the replacement of the gas in the chamber of the toasting device prior to S2 serves to reduce the humidity of the gas in the toasting device.
S3: and judging whether the baking stopping condition is reached according to the water evaporation function by the computer, and ending the baking when the baking stopping condition is reached.
Specifically, the computer obtains the pressure generated by the baking moisture evaporation of the battery at the moment according to the moisture evaporation function, and if the pressure generated by the baking moisture evaporation of the battery in the termination time does not reach the upper limit pressure of the vacuum degree, the baking is stopped.
Specifically, for the baking apparatus used for the first time, the step of determining the leakage function thereof is specifically:
placing the baking equipment which is used for the first time under an empty load condition, vacuumizing the cavity of the baking equipment, enabling the air pressure in the cavity to reach the ultimate vacuum pressure, closing all valves and switches of the baking equipment, enabling the baking equipment to keep a sealing state, collecting pressure data of all moments from the ultimate vacuum pressure to the upper limit pressure of the vacuum degree in the baking equipment under the sealing state, storing all the pressure data to a computer, and determining a leakage function according to the pressure data by the computer.
Specifically, the process of determining the leakage function is specifically:
(1) Collecting pressure data of each moment from the ultimate vacuum pressure to the upper limit pressure of the vacuum degree in the baking equipment under the no-load and sealed state, and further obtaining an initial pressure rising function y 1 ＝f(t)；
(2) Deriving an initial pressure rising function, and obtaining a pressure rising rate function y at each moment 2 ＝f’(t)；
(3) Converting the function of the rising rate of pressure into a function of the rising rate of pressure changing along with the pressure by an inverse function, and integrating the function of the rising rate of pressure changing along with the pressure to obtain a leakage function
The specific formula is as follows:
t＝f -1 (y 1 )
y 2 ＝f'(f -1 (y 1 ))
as an alternative implementation mode, the value of the ultimate vacuum pressure is less than or equal to 10pa, and the value of the set upper limit vacuum pressure is 300pa or 500pa.
Specifically, for the nth baking apparatus (n.gtoreq.2), the leakage function was determined specifically as:
and automatically correcting the leakage function of the Nth vacuum baking by a computer according to the leakage function and the water evaporation function of the baking equipment in the Nth vacuum baking.
And carrying out data trend fitting on the big data of the previous N-1 times of baking processes, so that the change trend of the pressure rising rate in the baking process can be obtained, and then, the leakage function is adjusted according to the trend.
In summary, the control method for baking the lithium ion battery provided by the invention determines the leakage function before each vacuum baking, so as to determine the moisture evaporation function and the baking stopping condition during the baking, and avoid the problem of low baking efficiency caused by the fact that the equipment leakage rate is not considered in the prior art. The baking program action is controlled through the variation trend of the gas pressure in the baking oven cavity, so that the reasonable baking action can be automatically adapted to the water content of different batteries, and the baking efficiency is greatly improved. The problem of insufficient baking or low efficiency caused by controlling the stopping of baking through time in the prior art is avoided by determining the water evaporation function during the baking and further determining the stopping condition of the baking.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (5)
1. The control method for baking the lithium ion battery is characterized by comprising the following steps of:
s1: determining a function of pressure rise of the baking equipment caused by leakage, namely a leakage function of the baking equipment;
the S1 specifically comprises the following steps:
for the baking equipment used for the first time, placing the baking equipment used for the first time under an empty load condition, vacuumizing the cavity of the baking equipment, enabling the air pressure in the cavity to reach the ultimate vacuum pressure, closing all valves and switches of the baking equipment, enabling the baking equipment to keep a sealing state, collecting pressure data of all moments from the ultimate vacuum pressure to the upper limit pressure of the vacuum degree in the baking equipment under the sealing state, storing all the pressure data to a computer, and determining a leakage function according to all the pressure data by the computer;
the process of determining the leakage function by the computer from all pressure data is specifically:
collecting pressure data of each moment from the ultimate vacuum pressure to the upper limit pressure of the vacuum degree in the baking equipment in an idle and sealed state, and further acquiring an initial pressure rising function;
deriving the initial pressure rising function, and obtaining a pressure rising rate function at each moment;
converting the function of the rising rate of the pressure into a function of the rising rate of the pressure changing along with the pressure by an inverse function, and integrating the function of the rising rate of the pressure changing along with the pressure to obtain a leakage function;
s2: setting a plurality of control parameters in the vacuum baking process, placing the battery in baking equipment for vacuum baking, controlling the process steps in the vacuum baking process based on the control parameters, and simultaneously acquiring a function of pressure rise of the battery due to moisture evaporation in the vacuum baking process, namely a moisture evaporation function, in real time according to the leakage function;
the parameters comprise ultimate vacuum pressure, upper limit vacuum pressure, lower limit vacuum pressure, drying pressure, termination time, baking temperature and upper limit vacuumizing time;
the step S2 is specifically as follows:
placing the battery in a baking device for vacuum baking, automatically introducing inert gas or dry gas into the cavity when the pressure in the cavity of the baking device rises to the upper limit pressure of the vacuum degree in the vacuum baking process, enabling the gas pressure in the cavity to reach the dry pressure, and extracting mixed gas after uniform mixing until the pressure in the cavity falls to the lower limit pressure of the vacuum degree, and continuing baking; when the pressure in the cavity rises to the upper limit pressure of the vacuum degree again, inert gas or dry gas is introduced again, the mixed gas is uniformly mixed and pumped out, and the circulation work is performed;
meanwhile, monitoring and acquiring a function of pressure rise and time in the cavity, namely a pressure rise function, of the battery in the vacuum baking process in real time, so as to acquire a water evaporation function;
the calculation formula of the water evaporation function is as follows:
wherein g (t) is a water evaporation function, f (t) is a pressure rising function,
as a leakage function;
s3: judging whether the baking stopping condition is reached according to the water evaporation function, and ending the baking if the baking stopping condition is reached.
2. The control method for baking a lithium ion battery according to claim 1, wherein in the process of extracting the mixed gas until the pressure in the cavity drops to the lower limit pressure of the vacuum degree, if the required time exceeds the upper limit of the vacuum pumping time, the leakage amount of the baking device is excessive, and the baking device is stopped.
3. The control method for baking a lithium ion battery according to claim 1, wherein S3 specifically comprises:
and the computer acquires the pressure generated by the baking moisture evaporation of the battery at the moment according to the moisture evaporation function, and if the pressure generated by the baking moisture evaporation of the battery does not reach the upper limit pressure of the vacuum degree within the set time, the baking is stopped.
4. The control method for baking a lithium ion battery according to claim 1, wherein gas in a chamber of the baking apparatus is subjected to gas substitution before the S2 is performed.
5. The method for controlling baking of lithium ion battery according to claim 4, wherein the gas replacement process is specifically:
the battery is placed in the baking equipment, the cavity is vacuumized once, so that the air pressure in the cavity reaches the upper limit pressure of the vacuum degree, baking is performed, inert gas or dry gas is introduced into the cavity, the pressure in the cavity reaches the dry pressure, and the secondary vacuumizing is performed, so that the air pressure in the cavity reaches the lower limit pressure of the vacuum degree, and air replacement in the baking equipment is realized.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131564A (en) * | 1994-10-11 | 1996-09-25 | 庄臣及庄臣医药有限公司 | Plasma-enhanced vacuum drying |
| CN102012148A (en) * | 2010-11-19 | 2011-04-13 | 何天青 | Vacuum drying device and control method |
| CN102628639A (en) * | 2012-05-09 | 2012-08-08 | 常州广为仪器科技有限公司 | Vacuum drying device and vacuum drying control method |
| CN106643003A (en) * | 2015-11-01 | 2017-05-10 | 深圳市沃特玛电池有限公司 | Vacuum drying method for lithium battery cell |
| CN107257707A (en) * | 2014-12-16 | 2017-10-17 | 阿特拉斯·科普柯空气动力股份有限公司 | The drier of compressed gas, the compressor apparatus for being provided with this drier and the method for dry gas |
| 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 |
| CN110767942A (en) * | 2019-10-30 | 2020-02-07 | 东莞维科电池有限公司 | Battery cell baking method and baking equipment |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB202586A (en) * | 1923-02-02 | 1923-08-23 | Edward Lionel Joseph | Improvements in or relating to the manufacture of tea and the like |
| SE0001453D0 (en) * | 2000-04-19 | 2000-04-19 | Astrazeneca Ab | Method of monitoring a freeze drying process |
| JP5064119B2 (en) * | 2007-06-07 | 2012-10-31 | 東京エレクトロン株式会社 | Vacuuming method and storage medium |
| US9644891B2 (en) * | 2012-02-01 | 2017-05-09 | Revive Electronics, LLC | Methods and apparatuses for drying electronic devices |
| US10254043B2 (en) * | 2016-09-22 | 2019-04-09 | Grst International Limited | Method of drying electrode assemblies |
| EP3528319A4 (en) * | 2016-10-11 | 2019-10-30 | Nissan Motor Co., Ltd. | Electrode drying method |
| KR102208454B1 (en) * | 2016-12-15 | 2021-01-27 | 주식회사 엘지화학 | Drying apparatus for electrode |
| US10458705B2 (en) * | 2017-02-02 | 2019-10-29 | Asp Global Manufacturing Gmbh | Apparatus and method for detecting moisture in a vacuum chamber |
| CN107741122A (en) * | 2017-09-13 | 2018-02-27 | 东莞市创明电池技术有限公司 | Lithium-ion electric core baking method and preparation method |
| CN108091937B (en) * | 2017-12-04 | 2020-01-14 | 广州市融成锂能锂电池有限公司 | Pole piece drying method of high-rate lithium ion battery and high-rate lithium ion battery |
| JP6509315B1 (en) * | 2017-12-20 | 2019-05-08 | アクトファイブ株式会社 | Work drying judgment method after steam cleaning and steam cleaning vacuum drying apparatus |
| CN109241615A (en) * | 2018-09-01 | 2019-01-18 | 深圳力士智造科技有限公司 | A kind of computation model of water removal real-time in process of vacuum drying |
| CN109888366A (en) * | 2019-01-21 | 2019-06-14 | 南京国轩电池有限公司 | A kind of stage baking process of pole group moisture of lithium ion battery |
| CA3111207A1 (en) * | 2020-03-05 | 2021-09-05 | Green Mountain Mechanical Design, Inc. | Partial vacuum drying system and method |
| CN111486664B (en) * | 2020-04-23 | 2021-11-09 | 华鼎国联四川动力电池有限公司 | Baking curve construction method and baking method of lithium ion battery pole piece |
| WO2021082448A1 (en) * | 2020-06-05 | 2021-05-06 | 广州理文科技有限公司 | Apparatus for ultrasonic wave-assisted drying of lithium battery electrolyte, and drying method |
| CN112179088A (en) * | 2020-09-25 | 2021-01-05 | 湖南省嘉品嘉味生物科技有限公司 | Vacuum dehydration equipment for food processing |
| CN112797740B (en) * | 2020-12-30 | 2022-10-14 | 湖北亿纬动力有限公司 | Baking method of lithium ion battery |
| CN113488701A (en) * | 2021-07-07 | 2021-10-08 | 湖北亿纬动力有限公司 | Baking method for aluminum-shell lithium ion battery |
| CN114050321A (en) * | 2021-11-22 | 2022-02-15 | 上海兰钧新能源科技有限公司 | Baking process and baking device for lithium ion battery |
-
2022
- 2022-03-02 CN CN202210199545.4A patent/CN114659341B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131564A (en) * | 1994-10-11 | 1996-09-25 | 庄臣及庄臣医药有限公司 | Plasma-enhanced vacuum drying |
| CN102012148A (en) * | 2010-11-19 | 2011-04-13 | 何天青 | Vacuum drying device and control method |
| CN102628639A (en) * | 2012-05-09 | 2012-08-08 | 常州广为仪器科技有限公司 | Vacuum drying device and vacuum drying control method |
| CN107257707A (en) * | 2014-12-16 | 2017-10-17 | 阿特拉斯·科普柯空气动力股份有限公司 | The drier of compressed gas, the compressor apparatus for being provided with this drier and the method for dry gas |
| CN106643003A (en) * | 2015-11-01 | 2017-05-10 | 深圳市沃特玛电池有限公司 | Vacuum drying method for lithium battery cell |
| 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 |
| CN110767942A (en) * | 2019-10-30 | 2020-02-07 | 东莞维科电池有限公司 | Battery cell baking method and baking equipment |
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