CN108376802A - A kind of battery drying means - Google Patents
A kind of battery drying means Download PDFInfo
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- CN108376802A CN108376802A CN201810108984.3A CN201810108984A CN108376802A CN 108376802 A CN108376802 A CN 108376802A CN 201810108984 A CN201810108984 A CN 201810108984A CN 108376802 A CN108376802 A CN 108376802A
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- battery
- drying means
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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 present invention provides a kind of drying means of battery, which includes the following steps：(1) battery is provided；(2) forvacuum processing and heat treatment are carried out successively to the battery, the heat treatment uses infrared radiation heating；(3) to through step (2), treated that battery carries out under air-proof condition " vacuum nitrogen gas vacuumizes " recycles pumping process.The drying means of battery of the present invention has many advantages, such as that heating speed is fast, it is efficient to vacuumize, it can significantly reduce the water content of battery, to solve because the decomposition for the electrolyte that the battery core moisture of battery is out of control or roughening control occurs is abnormal, generating gas makes battery bulging, deteriorates the problems such as electrical property.
Description
Technical field
The present invention relates to cell manufacturing techniques field more particularly to a kind of battery drying means.
Background technology
With the rapid development of social economy, demand of the mankind to the energy is also increasing, it is desirable that also higher and higher.Tradition
The energy has been unable to meet people's requirement.The a large amount of shiftings of driven by energy needs of mobile electronic device, communication apparatus, hybrid vehicle
Dynamic power supply.Lithium ion battery is due to having many advantages, such as that high-energy density, large capacity, long-life obtain the approval and welcome of industry.
The baking drying of battery core is mostly important one of link in lithium ion battery production.The moisture management and control of battery core is to electricity
Capacity, charge/discharge cycle characteristics, safety and the stability in pond have great influence.The moisture of battery core is out of control or roughening control will
The decomposition of extreme influence electrolyte lithium salts, generate gas, make battery bulging, deteriorate electrical property.
In recent years, battery baking is mainly using the concentration heating battery in closed cavity.Such as in closed tunnel chamber
In body, battery is centrally placed using fixture, realizes that battery high-temperature is dried by heating air transfers heat；Or utilize placement
Fixture in airtight cavity heats battery, and then vacuumizing progress battery to cavity is total to vacuum collective drying etc..By heating
And concentrate vacuumize in the cavity, the highly effective drying of battery can be effectively facilitated.But such drying means has centainly
Limitation, for example pumpdown time is long, and the hot water vapor evaporated very likely repeats condensation etc. in the cavity or in pump-line
It is insufficient.
Based on the above situation, it is badly in need of a kind of battery drying means efficiently, easy, water content is low, other property to produce
The good battery of energy, to solve because the moisture of battery battery core is out of control or the decomposition of the electrolyte of roughening control appearance generates gas and makes
At battery bulging, deteriorate the problems such as electrical property.
Invention content
The purpose of the present invention is to provide a kind of battery drying means, the water content of the battery dried out meet country or even
International relevant criterion, to solve to generate gas because of the decomposition for the electrolyte that the moisture of battery battery core is out of control or roughening control occurs
Body causes battery bulging, deteriorates the problems such as electrical property.
To achieve the above object, the present invention provides a kind of battery drying means, include the following steps：
(1) battery is provided；
(2) forvacuum processing and heat treatment are carried out successively to the battery, the heat treatment uses infra-red radiation
Heating；
(3) to treated that battery carries out under air-proof condition through step (2) " vacuumize-inflated with nitrogen-vacuumize " cycle
Pumping process.
Compared with prior art, battery drying means provided by the invention, has the following advantages：
1. using infrared radiation heating, the infrared ray of producible certain wavelength to battery heat treatment in step (2)
Radiation energy has high intensity, high thermal effect, high-penetration to generate fuel factor, thus one can be formed around battery
The ring of encirclement can carry out uniform and comprehensive heating to the battery core of battery whole surface and inside battery.
2. pair battery carries out forvacuum, the moisture of the battery core in battery is easier to evaporate under high vacuum environment, infrared
Radiant heating heating initial period plays battery core moisture high-efficiency evaporating ability.High vacuum moisture low boiling point characteristic can promote electricity
Pond can fully be dried in the lower temperature of infrared radiation heating, and the water content to reduce battery as quick as thought does not influence simultaneously
Inside battery material property.
3. with the evaporation of battery moisture, steam-laden degree rises in battery, and air pressure increases, further, in step
(3) single battery " vacuumize-inflated with nitrogen-vacuumize " cycle pumping process is carried out under air-proof condition in battery.It is pair
Battery carries out the vapor in vacuumize process removal battery, and water can thoroughly be excluded by then carrying out inflated with nitrogen to normal pressure to battery
Point.It recycles according to this, to make the moisture in battery persistently evaporate, achievees the purpose that constantly to reduce battery core moisture, to avoid electricity
Pond bulging deteriorates the problems such as electrical property.
Description of the drawings
Fig. 1 is the schematic front view of battery drying equipment therefor and battery.
Fig. 2 is the schematic top plan view of battery drying equipment therefor and battery.
Fig. 3 is that battery dries equipment therefor and the right side of battery regards schematic diagram.
Specific implementation mode
For the technology contents that the present invention will be described in detail, construction feature, below in conjunction with embodiment and coordinate attached drawing make into
One step explanation.
A kind of battery drying means, includes the following steps：
(1) battery is provided；
(2) forvacuum processing and heat treatment are carried out successively to the battery, the heat treatment uses infra-red radiation
Heating；
(3) to treated that battery carries out under air-proof condition through step (2) " vacuumize-inflated with nitrogen-vacuumize " cycle
Pumping process.
Battery receives the size of infrared energy, first, by regulating cell at a distance from heating board, distance is close, radiation
Heat is big, second is that by the way that the temperature control device control heating board break-make in cell top end lid is arranged.
Specifically, carrying out infrared radiation heating, infra-red radiation heating board using infra-red radiation heating board in the step (2)
It is placed in the both sides of battery.The shortest distance between the infra-red radiation heating board and the battery is 2~10mm, and passes through setting
The break-make of temperature control device control infra-red radiation heating board heating on the battery, makes battery temperature control at 60~120 DEG C.
Temperature control device can be currently used BMS battery management systems, generally include control unit and sensor, as temperature sensor,
Voltage and current sensor, the present invention are set to by temperature sensor on battery, more specifically connect battery pole to
The temperature of battery is monitored, signal reaction is given to infra-red radiation heating board according to the temperature of inside battery, it is red to control
The break-make of external radiation heating board.
Infra-red radiation heating board is placed in the both sides of battery, preferably the two of battery maximum side.It should be noted that this
The battery drying means of invention is applicable to battery or the battery pack by battery composition, when if battery pack, infra-red radiation fever
The plate length of plate can be identical as the total length of battery pack, and infra-red radiation heating board be located at battery pack both sides and with battery pack
Length direction is parallel.
Carrying out forvacuum processing to battery in the step (2) makes the vacuum degree of battery be -80~-101Kpa, pre- to take out
The time of vacuum processing is 4~10min.
To through step (2), treated that battery carries out " vacuumizing-inflated with nitrogen-pumping under air-proof condition in the step (3)
When vacuum " recycles pumping process, described vacuumize to make the inside battery air pressure is 10~500Pa, and the inflated with nitrogen is pair
The battery is filled with nitrogen to normal pressure, relatively totally to remove the vapor in battery, and keeps the external form of battery under normal pressure.
To through step (2), treated that battery carries out " vacuumizing-inflated with nitrogen-pumping under air-proof condition in the step (3)
The time that vacuum " recycles pumping process is 2~12h.
Carry out the pumping of " vacuumize-inflated with nitrogen-vacuumize " cycle in the step (3) under air-proof condition to the battery
A Y-shaped pipeline is used in processing, and one end of the Y-shaped pipeline and the liquid injection port of the battery are tightly connected, another both ends respectively with pumping
Vacuum pipe is connected with inflated with nitrogen seal for pipe joints.
Heating unit is set on the outside of the vacuum lead, and heating unit can be that heater strip, pipeline heater, pipeline add
Torrid zone etc. prevents the vapor of vacuum lead from condensing in the duct again, the quick clean exclusion of vapor in advantageous battery.
Further, the heating device that pair battery is heated referring to Fig.1~3 makes simple declaration.
As shown in figures 1 and 3, one end of Y-shaped pipeline 1 and the liquid injection port (not shown) of battery 7 are tightly connected, and another two
End is tightly connected with vacuum lead 2 and nitrogen charging feed channel 3 respectively.Heating unit 4 is wrapped in around vacuum lead 2, herein
Heating unit 4 is heater strip in embodiment, and heating unit 4 prevents the vapor of vacuum lead 2 from condensing in the duct again, has
Conducive to the quick clean exclusion of vapor in battery 7.Temperature control device 5 is placed in the head cover of battery 7 and connects the pole of battery 7 (figure
In be not shown) and the temperature of battery 7 is monitored.
As shown in Fig. 2, infra-red radiation heating board 6 is placed in the both sides of the battery pack of 4 batteries 7 composition, that is, battery 7
Maximum side, and there is a certain distance between battery.Infra-red radiation heating board 6 is connect with temperature control device 5, and temperature control device
Temperature in 5 pairs of batteries 7 is monitored while providing signal to infra-red radiation heating board 6 and controlling the logical of infra-red radiation heating board
It is disconnected.When the temperature of battery 7 reaches the temperature of setting, temperature control device 5 provides cut-off signal to infra-red radiation heating board 6, infrared
Radiation heating plate 6 stops heating radiation；When the temperature of battery 2 declines, temperature control device 5 connects to the offer of infra-red radiation heating board 6
Messenger, infra-red radiation heating board 6 begin to warm up radiation, to make the temperature of battery stablize in set temperature.
It is described in detail using embodiment below for the battery drying means of the present invention.
Embodiment 1
A kind of drying means of battery, includes the following steps：
(1) battery is provided, and battery is placed steadily；
(2) Y-tubes are docked with the sealing of battery liquid-filling mouth, and wherein the vacuum lead of Y-tubes takes out battery in advance
It is vacuum-treated, the vacuum degree in cell body is -101KPa, and the time of atmospheric pressure value 50Pa, forvacuum processing are 10min；
(3) after the completion of forvacuum, the shell to placing steady battery is heated using infra-red radiation heating board, infra-red radiation
The shortest distance between heating board and battery maximum side is 4mm, and the break-make of infra-red radiation heating board is by being arranged in battery cap
And the temperature control device control of connecting post, and controlled at 105 DEG C；
(4) during heating, battery temperature maintains in 105 DEG C +/- 3 DEG C, with the steaming of battery core moisture in battery
Hair, the rising of air pressure.When air pressure reaches 200Pa in battery, vacuum lead starts at once to battery vacuum-pumping to 40Pa, to remove
Remove the steam in cell body.Inflated with nitrogen is then carried out to normal pressure 101KPa, further totally to remove battery moisture, and restores electricity
Pond external form.Start new round cycle immediately and be evacuated to 50Pa, so that battery core moisture is fully evaporated, recycle according to this.The weight at 105 DEG C
It is multiple " to be evacuated to 50Pa- moisture evaporations, it is true to 40Pa- inflated with nitrogen to normal pressure-pumping that air pressure rises to the true exclusion steam of 200Pa- pumpings
For sky to 50Pa " cyclic processes, entire drying process cycle pumpdown time is 10h；
(5) temperature through step (4) treated battery is dropped to 40 DEG C；
(6) battery changes without external form after the completion of drying, tests the water content of the battery core after drying in 150PPM hereinafter, meeting
Battery production requirement.
Embodiment 2
(1) battery is provided, and battery is placed steadily；
(2) Y-tubes are docked with the sealing of battery liquid-filling mouth, and wherein the vacuum lead of Y-tubes takes out battery in advance
It is vacuum-treated, the vacuum degree in cell body is -101KPa, and the time of atmospheric pressure value 100Pa, forvacuum processing are 4min；
(3) after the completion of forvacuum, the shell to placing steady battery is heated using infra-red radiation heating board, infra-red radiation
The shortest distance between heating board and battery maximum side is in 6mm, and the break-make of infra-red radiation heating board is by being arranged on battery top
It covers and the temperature control device of connecting post controls, and controlled at 100 DEG C；
(4) during heating, battery temperature maintains in 100 DEG C +/- 3 DEG C, with the steaming of battery core moisture in battery
Hair, the rising of air pressure.When air pressure reaches 300Pa in battery, vacuum lead starts at once to battery vacuum-pumping to 80Pa, to remove
Remove the steam in cell body.Inflated with nitrogen is then carried out to normal pressure 101KPa, further totally to remove battery moisture and restore electricity
Pond external form.After " vacuumizing-inflated with nitrogen " excludes moisture, that is, starts new round cycle and be evacuated to 100Pa, to ensure that moisture is abundant
Evaporation, recycles according to this.It repeats " to be evacuated to 100Pa- moisture evaporations, air pressure rises to 300Pa- and takes out true exclusion water at 100 DEG C
Vapour is evacuated to 100Pa " cyclic processes to 80Pa- inflated with nitrogen to normal pressure 101KPa-, and entire drying process cycle pumpdown time is
8h；
(5) temperature through step (4) treated battery is dropped to 40 DEG C；
(6) battery changes without external form after the completion of drying, tests the water content of the battery core after drying in 180PPM hereinafter, meeting
Battery production requirement.
Embodiment 3
A kind of drying means of battery, includes the following steps：
(1) battery is provided, and battery is placed steadily；
(2) Y-tubes are docked with the sealing of battery liquid-filling mouth, and wherein the vacuum lead of Y-tubes takes out battery in advance
It is vacuum-treated, the vacuum degree in cell body is -101KPa, and the time of atmospheric pressure value 200Pa, forvacuum processing are 6min.
(3) after the completion of forvacuum, the shell to placing steady battery is heated using infra-red radiation heating board, infra-red radiation
The shortest distance between heating board and battery maximum side is 8mm, and the break-make of infra-red radiation heating board is by being arranged in battery cap
And the temperature control device control of connecting post, and controlled at 90 DEG C；
(4) during heating, battery temperature maintains in 90 DEG C +/- 3 DEG C, with the steaming of battery core moisture in battery
Hair, the rising of air pressure.When air pressure reaches 500Pa in battery, vacuum lead starts at once to battery vacuum-pumping to 150Pa, with
Remove the steam in cell body.Inflated with nitrogen is then carried out to normal pressure 101KPa, further totally to remove battery moisture and recovery
Battery external form.After " vacuumizing-inflated with nitrogen " excludes moisture, that is, starts new round cycle and be evacuated to 200Pa, to ensure that moisture fills
Divide evaporation, recycles according to this.It repeats " to be evacuated to 200Pa- moisture evaporations, air pressure rises to 500Pa- and takes out true exclude at 100 DEG C
Steam is evacuated to 200Pa " cyclic processes to 150Pa- inflated with nitrogen to normal pressure 101KPa-, when entire drying process cycle pumping
Between be 6h；
(5) temperature through step (4) treated battery is dropped to 40 DEG C；
(6) battery changes without external form after the completion of drying, tests the water content of the battery core after drying in 200PPM hereinafter, meeting
Battery production requirement.
Comparative example 1
(1) battery is provided, and battery is placed steadily；
(2) Y-tubes are docked with the sealing of battery liquid-filling mouth, and wherein the vacuum lead of Y-tubes takes out battery in advance
It is vacuum-treated, the vacuum degree in cell body is -101KPa, and the time of atmospheric pressure value 100Pa, forvacuum processing are 4min；
(3) after the completion of forvacuum, the shell to placing steady battery is heated using infra-red radiation heating board, infra-red radiation
It is 6mm to send out the shortest distance between heating plate and battery maximum side, and the break-make of infra-red radiation heating board is by being arranged on battery top
It covers and the temperature control device of connecting post controls, and controlled at 100 DEG C；
(4) during heating, battery temperature maintains in 100 DEG C +/- 3 DEG C, with the steaming of battery core moisture in battery
Hair, the rising of air pressure.When air pressure reaches 300Pa in battery, vacuum lead starts at once removes battery vacuum-pumping to 100Pa
Steam in cell body and pressurize.It recycles according to this, entire drying process cycle pumpdown time is 8h；
(5) temperature through step (4) treated battery is dropped to 40 DEG C；
(6) water content of the battery core after test is dry belongs to quality of production defect in 280PPM or so, battery external form indent.
Comparative example 2
A kind of drying means of battery, includes the following steps：
(1) battery is provided, and battery is placed steadily；
(2) Y-tubes are docked with the sealing of battery liquid-filling mouth, and wherein the vacuum lead of Y-tubes takes out battery in advance
It is vacuum-treated, the vacuum degree in cell body is -101KPa, and the time of atmospheric pressure value 200Pa, forvacuum processing are 6min；
(3) after the completion of forvacuum, the shell to placing steady battery is heated using electric boiling plate, electric boiling plate and battery
The shortest distance between maximum side is 8mm, and the break-make of electric boiling plate is by being arranged the temperature control dress in battery cap and connecting post
Control is set, and controlled at 90 DEG C；
(4) during heating, battery temperature maintains in 90 DEG C +/- 3 DEG C, with the steaming of battery core moisture in battery
Hair, the rising of air pressure.When air pressure reaches 500Pa in battery, vacuum lead starts at once removes battery vacuum-pumping to 150Pa
Steam in cell body and pressurize.It recycles according to this, entire drying process cycle pumpdown time is 6h；
(5) temperature through step (4) treated battery is dropped to 40 DEG C；
(6) water content of the battery core after test is dry belongs to quality of production defect in 350PPM or so, battery external form indent.
Above-described embodiment and the water content of comparative example are carried out by karl Fischer moisture teller.
From the data of above-mentioned water content it is found that embodiment 1-3 is compared with comparative example 1-2, first, embodiment 1-3 drying productions
Battery external form it is complete, second is that battery water content is relatively low in embodiment 1-3.This is because being sealed to battery in step (3)
Under the conditions of carry out " vacuumize-inflated with nitrogen-vacuumize " cycle pumping process, the density ratio vapor of nitrogen it is big, in battery
The nitrogen filled can sink to the bottom in battery, be conducive to vacuum battery vapor and be quickly discharged, and reduce the water in battery
Content, and it is normal pressure to be filled with nitrogen to maintain battery, thus the external form of battery can be maintained without being deformed upon by effects of air pressure.
Above disclosed is only the preferred embodiments of the application, and the interest field of the application cannot be limited with this,
Therefore according to equivalent variations made by the application claim, the range that the application is covered is belonged to.
Claims (10)
1. a kind of battery drying means, which is characterized in that include the following steps：
(1) battery is provided；
(2) forvacuum processing and heat treatment are carried out successively to the battery, the heat treatment uses infrared radiation heating；
(3) to through step (2), treated that battery carries out under air-proof condition " vacuumize-inflated with nitrogen-vacuumize ", cycle is evacuated
Processing.
2. battery drying means according to claim 1, which is characterized in that sent out using infra-red radiation in the step (2)
Hot plate carries out infrared radiation heating, and infra-red radiation heating board is placed in the both sides of battery.
3. battery drying means according to claim 2, which is characterized in that the infra-red radiation heating board and the battery
Between the shortest distance be 2~10mm.
4. battery drying means according to claim 3, which is characterized in that by the way that temperature control dress on the battery is arranged
Set the break-make of control infra-red radiation heating board heating.
5. battery drying means according to claim 1, which is characterized in that taken out in advance to battery in the step (2)
Being vacuum-treated makes the vacuum degree of battery be -80~-101KPa.
6. battery drying means according to claim 1, which is characterized in that taken out in advance to battery in the step (2)
The time of vacuum processing is 4~10min.
7. battery drying means according to claim 1, which is characterized in that being handled through step (2) in the step (3)
It is described to vacuumize to make when battery afterwards carries out " vacuumize-inflated with nitrogen-vacuumize " cycle pumping process under air-proof condition
It is 10~500Pa to state inside battery air pressure, and the inflated with nitrogen is to be filled with nitrogen to normal pressure to the battery.
8. battery drying means according to claim 1, which is characterized in that being handled through step (2) in the step (3)
The time that battery afterwards carries out " vacuumize-inflated with nitrogen-vacuumize " cycle pumping process under air-proof condition is 2~12h.
9. battery drying means according to claim 1, which is characterized in that the battery close in the step (3)
" vacuumize-inflated with nitrogen-vacuumize " cycle pumping process is carried out under the conditions of envelope uses a Y-shaped pipeline, one end of the Y-shaped pipeline
It is tightly connected with the liquid injection port of the battery, another both ends are connect with vacuum lead and inflated with nitrogen seal for pipe joints respectively.
10. battery drying means according to claim 9, which is characterized in that setting heating on the outside of the vacuum lead
Unit.
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| CN201810108984.3A CN108376802A (en) | 2018-02-05 | 2018-02-05 | A kind of battery drying means |
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|---|---|---|---|
| CN201810108984.3A CN108376802A (en) | 2018-02-05 | 2018-02-05 | A kind of battery drying means |
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Cited By (2)
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| CN109489363A (en) * | 2018-12-24 | 2019-03-19 | 国兴(东莞)新能源科技有限公司 | A kind of soft-package battery de-watering apparatus |
| CN109974399A (en) * | 2019-03-19 | 2019-07-05 | 泰顺永庆电力技术有限公司 | New energy battery drying means |
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| CN206774634U (en) * | 2017-06-12 | 2017-12-19 | 深圳市洋浦新丰科技有限公司 | A kind of combination drying device of three-dimensional lithium titanate lithium ion battery battery core |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489363A (en) * | 2018-12-24 | 2019-03-19 | 国兴(东莞)新能源科技有限公司 | A kind of soft-package battery de-watering apparatus |
| CN109974399A (en) * | 2019-03-19 | 2019-07-05 | 泰顺永庆电力技术有限公司 | New energy battery drying means |
| CN109974399B (en) * | 2019-03-19 | 2021-07-23 | 泰顺永庆电力技术有限公司 | New energy battery drying method |
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