CN104913601A - Method for baking lithium ion battery or battery pole piece in tunnel mode - Google Patents
Method for baking lithium ion battery or battery pole piece in tunnel mode Download PDFInfo
- Publication number
- CN104913601A CN104913601A CN201410832403.2A CN201410832403A CN104913601A CN 104913601 A CN104913601 A CN 104913601A CN 201410832403 A CN201410832403 A CN 201410832403A CN 104913601 A CN104913601 A CN 104913601A
- Authority
- CN
- China
- Prior art keywords
- pole piece
- lithium ion
- ion battery
- casing
- battery pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Secondary Cells (AREA)
Abstract
A method for baking a lithium ion battery or a battery pole piece in a tunnel mode at least includes the step of pulsation vacuum preheating, wherein the temperature in a preheating box is made to rise to first preset temperature within first preset time, a part of water in the preheating box is drained through a vacuumizing method within second preset time, and the preheating box is refilled with dry air; the temperature in the preheating box is made to rise to second preset temperature within third preset time, a part of water in the preheating box is drained through the vacuumizing method within fourth preset time, and the preheating box is refilled with dry air; the step is circulated in this way until the temperature of the lithium ion battery or the battery pole piece in the preheating box reaches technological design temperature. Compared with the mode of single temperature rise in the preheating box in the prior art, most water in the lithium ion battery or the battery pole piece can be removed in the preheating stage, the water removal effect is excellent, and the water removal time of a speed bar production line can be greatly shortened.
Description
Technical field
The present invention relates to the method for a kind of tunnel type baking lithium ion battery or battery pole piece.
Background technology
The manufacture of present electrodes of lithium-ion batteries or lithium ion battery, electrodes of lithium-ion batteries or lithium ion battery is all needed to carry out degree of depth oven dry, what existing degree of depth drying plant adopted is all single casing baking process, modal baking process is in a vacuum bakeout case, first the electrode of lithium cell be baked is loaded in vacuum bakeout case, heat in casing again, after the temperature inside the box reaches requirement, when being incubated, removing moisture will be vacuumized in casing, after the moisture of battery pole piece reaches requirement, again nature cooling carried out to the electrode of lithium cell be baked in casing or battery or force cooling, the temperature of electrode of lithium cell or the battery core be baked is made to drop to (being generally less than 35 degrees Celsius) to a certain degree, the electrode of lithium cell be baked or battery are taken out sealing preserve.Such as, Chinese patent literature CN104134777A discloses the method tunnel type baking lithium ion battery of a kind of tunnel type baking lithium ion battery or battery pole piece or the method for battery pole piece, it adopts the pulse vacuum preheating step of continuous operation, high vacuum segmentation water removal phase and quick cooling step, baking time can be shortened widely, the baking and the coating line that really realize lithium ion battery or battery pole piece are worked continuously, but in practice, its baking method need further raising.
Summary of the invention
For the deficiencies in the prior art, the object of the invention is can with battery pole piece production process in or battery production process in front and back operation realize working continuously, and the better tunnel type baking lithium ion battery of cured effect or the method for battery pole piece.
Technical scheme of the present invention is: provide a kind of tunnel type to toast the method for lithium ion battery or battery pole piece, at least comprise pulse vacuum preheating step or/and high vacuum segmentation water removal phase, wherein,
(1), pulse vacuum preheating step, within first scheduled time, the temperature in pre-incubator body is raised to the first predetermined temperature, when continuing to heat, within second scheduled time, adopt the method vacuumized to be discharged by the part moisture content in pre-incubator body, then, in pre-incubator body, recharge dry gas, make the pressure in pre-incubator body reach initial pressure; Within the 3rd scheduled time, the temperature in pre-incubator body is raised to the second predetermined temperature again, when continuing to heat, within the 4th scheduled time, adopt the method vacuumized to be discharged by the part moisture content in pre-incubator body, then, in pre-incubator body, recharge dry gas, make the pressure in pre-incubator body reach initial pressure; Circulation like this, until lithium ion battery in pre-incubator body or battery pole piece temperature reach technological design temperature; Or/and
(2), high vacuum segmentation water removal phase, under the state of insulation, vaccum dewatering process is divided into the section of vacuumizing of more than three sections, from first paragraph, every section of Absolute truth reciprocal of duty cycle of taking out increases progressively successively, until the moisture content of lithium ion battery or battery pole piece is dropped to the first predetermined moisture.
As improvement of the present invention, the present invention also comprises,
(3), quick cooling step, cooling medium is inputted in the interlayer of cooling box, and internal circulation apparatus is set in cooling box, the cold air of interlayer inwall is evenly spread in cooling box, the temperature of lithium ion battery or battery pole piece is dropped to the second predetermined temperature.
As to further improvement of the present invention, concentration difference stating step is also provided with after described (3) step, leave standstill in casing in described concentration difference, remove lithium ion battery or battery pole piece moisture further by concentration difference water-eliminating method, make the moisture of lithium ion battery or battery pole piece drop to the second predetermined moisture.
As to further improvement of the present invention, also transition step is provided with between two the adjacent steps needed, transition casing corresponding to described transition step is used for when the lithium ion battery needing reception to come from a upper casing or battery pole piece, first by the pressure adjusting in described transition casing to substantially equal with the pressure in a described upper casing; After lithium ion battery or battery pole piece are received and come, then by the pressure adjusting in transition casing to substantially equal with the pressure in next casing, and lithium ion battery or battery pole piece are sent in next casing described.
As to further improvement of the present invention, before described (1) step, when pre-temperature transition casing corresponding to described pre-temperature transition step is for receiving the lithium ion battery or battery pole piece of coming from a upper operation at ambient pressure, the pressure in described pre-temperature transition casing is substantially equal with atmospheric pressure; After lithium ion battery or battery pole piece are received and come, then by the pressure adjusting in pre-temperature transition casing to substantially equal with the pressure in described pre-incubator body, and lithium ion battery or battery pole piece are sent in described pre-incubator body.
As to further improvement of the present invention, pre-temperature transition step was provided with before described (1) step, when pre-temperature transition casing corresponding to described pre-temperature transition step is for receiving the lithium ion battery or battery pole piece of coming from a upper operation at ambient pressure, the pressure in described pre-temperature transition casing is substantially equal with atmospheric pressure; After lithium ion battery or battery pole piece are received and come, then by the pressure adjusting in pre-temperature transition casing to substantially equal with the pressure in described pre-incubator body, and lithium ion battery or battery pole piece are sent in described pre-incubator body.
As to further improvement of the present invention, described concentration difference water-eliminating method leaves standstill on casing in concentration difference at least to arrange drier and a circulating fan, in drier, be provided with drier, the gas that described circulating fan makes concentration difference leave standstill in casing constantly circulates through drier.
As to further improvement of the present invention, leave standstill casing circulation to described concentration difference and input the moisture content that produced by the gas dry station dry gas lower than 5ppm.
As to further improvement of the present invention, described concentration difference water-eliminating method is also included in concentration difference and leaves standstill the degasifier that casing is arranged, in degasifier, be provided with deoxidier, and the gas that described circulating fan makes concentration difference leave standstill in casing constantly circulates through deoxidier.
As to further improvement of the present invention, described second predetermined temperature is between 20 degrees Celsius to 60 degrees Celsius.
The present invention is owing to adopting in the pre-process heated up, vacuumize in pre-incubator body at interval of the scheduled time, because the moisture content in now pre-incubator body is cement stream mode, a large amount of moisture content can be discharged easily, supplement dry gas again to initial pressure, heat up again, so repeatedly, only heat up merely with incubator pre-in prior art, the most of moisture content in lithium ion battery or battery pole piece can be removed at pre-thermophase, its water removal effect is very good, and can shorten dewatering the time of fast bar production line widely; In addition, the way that vaccum dewatering adopts segmentation to dewater, the lithium ion battery entered when can effectively prevent rear or battery pole piece impact first advance into the true moisture content held except the lithium ion battery in water tank or battery pole piece; Adopt and pass into cooling medium in the interlayer of cooling box, change original in direct input cool drying gas in cooling box, the water content avoided in dry gas affects the problem of the moisture content of lithium ion battery or battery pole piece, and pass into cooling medium in the interlayer of cooling box, its cooling medium composition can be unrestricted, namely cooling medium can be gas, also can be liquid.
Accompanying drawing explanation
Fig. 1 is the plane block diagram of the first embodiment of baking process of the present invention.
Fig. 2 is the plane block diagram of the second embodiment of baking process of the present invention.
Fig. 3 is the schematic diagram of the pulse vacuum preheating step in the present invention.
Fig. 4 is the schematic diagram of the high vacuum segmentation water removal phase in the present invention.
Detailed description of the invention
Refer to Fig. 1, what Fig. 1 disclosed is a kind of method that tunnel type toasts lithium ion battery or battery pole piece, comprise the charging procedure 11 of continuous operation, pulse vacuum preheating step 1, high vacuum segmentation water removal phase 2, quick cooling step 3, concentration difference stating step 4 and discharging 12 step etc., described charging procedure 11, pulse vacuum preheating step 1, high vacuum segmentation water removal phase 2, quick cooling step 3, concentration difference stating step 4 and discharging step 12, being equipped with before and after corresponding working box can the door of switch, and connect and compose tunnel structure successively, each described working box is operationally independent sealed, when processed lithium ion battery or battery pole piece enter subsequent work casing from a upper work box, when keeping the pressure of adjacent two casings consistent, door between adjacent two outer case is opened, described lithium ion battery or battery pole piece driven-mechanism send into subsequent work casing, when each described working box processes lithium ion battery or battery pole piece by technique, the door between adjacent two outer case is closed, wherein,
(11), lithium ion battery or battery pole piece are placed on work top, prepare to enter pulse vacuum preheating step;
(1), pulse vacuum preheating step, (determine according to concrete technology in first scheduled time, generally can select in 5-10 minute) in the temperature in pre-incubator body be raised to the first predetermined temperature (determine according to concrete technology, generally can promote on the basis of original temperature in 10-30 degree Celsius and select), when continuing to heat, (determine according to concrete technology in second scheduled time, generally can select in 1-5 minute) in adopt the method that vacuumizes to be discharged by the part moisture content in pre-incubator body, then, in pre-incubator body, recharge dry gas (determine according to concrete technology, generally can select in 1-3 minute), the pressure in pre-incubator body is made to reach initial pressure, (determine according to concrete technology in the 3rd scheduled time again, generally can select in 5-10 minute) in the temperature in pre-incubator body be raised to the second predetermined temperature (determine according to concrete technology, generally can promote on the basis of original temperature in 10-30 degree Celsius and select), when continuing to heat, (determine according to concrete technology in the 4th scheduled time, generally can select in 1-5 minute) in adopt the method that vacuumizes to be discharged by the part moisture content in pre-incubator body, then, in pre-incubator body, recharge dry gas (determine according to concrete technology, generally can select in 1-3 minute), the pressure in pre-incubator body is made to reach initial pressure, circulation like this, until lithium ion battery in pre-incubator body or battery pole piece temperature reach technological design temperature (determining according to concrete technology, general 75 degrees Celsius to 250 degrees Celsius of technological design temperature),
Illustrate, if the total time of the whole pulse vacuum preheating step of a certain technique is 40 minutes, by battery pole piece (only for battery pole piece, lower same) rise to 100 degrees Celsius from 25 degrees Celsius, so just can adopt, in the first scheduled time T11 5 minutes (see figure 3)s, the temperature (setting initial temperature as 25 degrees Celsius) in pre-incubator body is raised to the first predetermined temperature 50 degrees Celsius, when continuing to heat, the method vacuumized is adopted in 3 minutes to be discharged by the part moisture content in pre-incubator body at the second scheduled time T12, then, be 2 minutes in first return-air time T13(the present embodiment) in pre-incubator body, recharge dry gas, the pressure in pre-incubator body is made to reach initial pressure, again in the 3rd scheduled time T21(5 minute, 3rd scheduled time can be identical with first scheduled time, also can not be identical, down together), the temperature in pre-incubator body is raised to the second predetermined temperature (the present embodiment is 75 degree), when continuing to heat, at the 4th scheduled time T22(3 minute, 4th scheduled time can be identical with second scheduled time, also can not be identical, lower with) in adopt the method vacuumized to be discharged by the part moisture content in pre-incubator body, then, in pre-incubator body, dry gas (2 minutes) is recharged in the second return-air time T23, the pressure in pre-incubator body is made to reach initial pressure, circulation like this, when the n in the n-th scheduled time Tn1 and the (n+1)th scheduled time Tn2 and the n-th return-air time Tn3 equals 4, battery pole piece is risen to 100 degrees Celsius from 25 degrees Celsius by the positive good utilisation time of 40 minutes.Or/and
(2), high vacuum segmentation water removal phase, under the state of insulation, vaccum dewatering process is divided into the section of vacuumizing of more than three sections, from first paragraph, every section of Absolute truth reciprocal of duty cycle of taking out increases progressively successively, until the moisture content of lithium ion battery or battery pole piece is dropped to the first predetermined moisture.
Illustrate, if vaccum dewatering process is divided into the section of vacuumizing of ten sections, see Fig. 4, the Cn namely in Fig. 4, wherein n=10; So first paragraph C1 can vacuumize as the positive and negative 20Pa of Absolute truth reciprocal of duty cycle to 100 Pa, battery pole piece is proceeded to second segment C2 and continues to be evacuated to the positive and negative 20Pa of Absolute truth reciprocal of duty cycle to 80 Pa, then proceeds to the 3rd section of C3 and continue to be evacuated to the positive and negative 10Pa of Absolute truth reciprocal of duty cycle to 70 Pa; Proceed to the 4th section (not shown in FIG.) again to continue to be evacuated to the positive and negative 10Pa of Absolute truth reciprocal of duty cycle to 60 Pa; So analogize, until reach the tenth section of Cn, n=10, to reach production engineering specifications.
The present invention also comprises (3), quick cooling step, cooling medium is inputted in the interlayer of cooling box, and internal circulation apparatus is set in cooling box, the cold air of interlayer inwall is evenly spread in cooling box, the temperature of lithium ion battery or battery pole piece is dropped to the second predetermined temperature.In the present invention, cooling medium can liquid cooling medium as water or salt solution; Also can gas cooling medium, as cold air etc.
(4), leave standstill in casing in described concentration difference, remove lithium ion battery or battery pole piece moisture further by concentration difference water-eliminating method, make the moisture of lithium ion battery or battery pole piece drop to the second predetermined moisture.In the present embodiment, described concentration difference water-eliminating method leaves standstill on casing in concentration difference at least to arrange drier and a circulating fan, and in drier, be provided with drier, the gas that described circulating fan makes concentration difference leave standstill in casing constantly circulates through drier.Or/and described concentration difference water-eliminating method is also included in concentration difference leave standstill the degasifier arranged in casing, in degasifier, be provided with deoxidier, the gas that described circulating fan makes concentration difference leave standstill in casing constantly circulates through deoxidier.
(12), discharging, the lithium ion battery after concentration difference process or battery pole piece, sealing state under be admitted to next procedure, for coating line, next procedure can be slicing process, and for battery, next procedure can fluid injection operation.
Above-mentioned quick cooling and concentration difference stating step first cool to leave standstill afterwards, and described quick cooling and concentration difference stating step also can be first leave standstill rear cooling, and like this in the standing link process condition of high temperature, its water removal effect is better, and it comprises:
Open vaccum dewatering casing and concentration difference and leave standstill door between casing (need concentration difference to leave standstill pressure adjusting to substantially equal with the pressure in vaccum dewatering casing) in casing, the lithium ion battery in vaccum dewatering casing or battery pole piece are sent into concentration difference and leaves standstill in casing; At M doubly within the total time that pulse vacuum preheating casing is used, wherein, best M=1,2 or 3, removes lithium ion battery or battery pole piece moisture further by concentration difference water-eliminating method, makes the moisture of lithium ion battery or battery pole piece drop to the second predetermined moisture;
Pressure concentration difference left standstill in casing is adjusted to normal pressure, open concentration difference and leave standstill door between casing and cooling box, concentration difference is left standstill lithium ion battery in casing or battery pole piece is sent in cooling box, and cooling medium is inputted in cooling box, at M doubly within the total time that pulse vacuum preheating casing is used, wherein, preferably M=1,2 or 3, drops to the second predetermined temperature by the temperature of lithium ion battery or battery pole piece.
In the present invention, described quick cooling and concentration difference stating step can also carry out as follows, and namely cooling limit in limit leaves standstill and dewaters, and comprises the steps:
Open vaccum dewatering casing and concentration difference and leave standstill door between casing, the lithium ion battery in vaccum dewatering casing or battery pole piece are sent into concentration difference and to leave standstill in casing (need concentration difference to leave standstill pressure adjusting to substantially equal with the pressure in vaccum dewatering casing) in casing; At M doubly within the total time that pulse vacuum preheating casing is used, wherein, preferably M=1,2 or 3, removes lithium ion battery or battery pole piece moisture further by concentration difference water-eliminating method, makes the moisture of lithium ion battery or battery pole piece drop to the second predetermined moisture; And in cooling box, input cooling medium simultaneously, the temperature of lithium ion battery or battery pole piece is dropped to the second predetermined temperature.
In the present invention, described concentration difference water-eliminating method can be leave standstill on casing in concentration difference at least to arrange drier and a circulating fan, and in drier, be provided with drier, the gas that described circulating fan makes concentration difference leave standstill in casing constantly circulates through drier; Also can be leave standstill casing circulation to described concentration difference to input the moisture content that produced by the gas dry station dry gas lower than 5ppm, leave standstill in casing in concentration difference and circulate, utilize moisture content to take away moisture content in lithium ion battery or battery pole piece further lower than the dry gas of 5ppm.
Preferably, described second predetermined temperature is between 25 degrees Celsius to 60 degrees Celsius.
Preferably, described second predetermined moisture is between 10ppm to 200ppm.
In the present embodiment, described drier can adopt quick lime or silica gel; Described deoxidier can adopt iron powder series deoxidier etc.
Refer to Fig. 2, Fig. 2 is the plane block diagram of the second embodiment of baking process of the present invention, and this baking process comprises the charging procedure 11 of continuous operation, pre-temperature transition step 111, pulse vacuum preheating step 1, vacuum transition step 31, high vacuum segmentation water removal phase 2, cooled transition step 41, quick cooling step 3, concentration difference stating step 4 and discharging 12 step etc., described charging procedure 11, pre-temperature transition step 111, pulse vacuum preheating step 1, vacuum transition step 31, high vacuum segmentation water removal phase 2, cooled transition step 41, quick cooling step 3, concentration difference stating step 4 and discharging 12, being equipped with before and after corresponding working box can the door of switch, and connect and compose tunnel structure successively, each described working box is operationally independent sealed, when processed lithium ion battery or battery pole piece enter subsequent work casing from a upper work box, when keeping the pressure of adjacent two casings consistent, door between adjacent two outer case is opened, and described lithium ion battery or battery pole piece driven-mechanism send into subsequent work casing, when each described working box processes lithium ion battery or battery pole piece by technique, the door between adjacent two outer case is closed, wherein,
(11), lithium ion battery or battery pole piece are placed on work top, prepare to enter the excessive step that heats up;
(111), heat up excessive step, by the excessive casing of intensification corresponding to excessive step that heats up, lithium ion battery or battery pole piece will be entered at ambient pressure, and the Qianmen of the excessive casing that heats up is closed, by input protection gas, the pressure heated up in excessive casing is risen to substantially equal with the pressure in pulse vacuum preheating casing, prepare lithium ion battery or battery pole piece to be transplanted in pulse vacuum preheating casing;
(1), pulse vacuum preheating step, (determine according to concrete technology in first scheduled time, generally can select in 5-10 minute) in the temperature in pre-incubator body be raised to the first predetermined temperature (determine according to concrete technology, generally can promote on the basis of original temperature in 10-30 degree Celsius and select), when continuing to heat, (determine according to concrete technology in second scheduled time, generally can select in 1-5 minute) in adopt the method that vacuumizes to be discharged by the part moisture content in pre-incubator body, then, in pre-incubator body, recharge dry gas (determine according to concrete technology, generally can select in 1-3 minute), the pressure in pre-incubator body is made to reach initial pressure, (determine according to concrete technology in the 3rd scheduled time again, generally can select in 5-10 minute) in the temperature in pre-incubator body be raised to the second predetermined temperature (determine according to concrete technology, generally can promote on the basis of original temperature in 10-30 degree Celsius and select), when continuing to heat, (determine according to concrete technology in the 4th scheduled time, generally can select in 1-5 minute) in adopt the method that vacuumizes to be discharged by the part moisture content in pre-incubator body, then, in pre-incubator body, recharge dry gas (determine according to concrete technology, generally can select in 1-3 minute), the pressure in pre-incubator body is made to reach initial pressure, circulation like this, until lithium ion battery in pre-incubator body or battery pole piece temperature reach technological design temperature (determining according to concrete technology, general 75 degrees Celsius to 250 degrees Celsius of technological design temperature),
Illustrate, if the total time of the whole pulse vacuum preheating step of a certain technique is 40 minutes, by battery pole piece (only for battery pole piece, lower same) rise to 100 degrees Celsius from 25 degrees Celsius, so just can adopt, in the first scheduled time T11 5 minutes (see figure 3)s, the temperature (setting initial temperature as 25 degrees Celsius) in pre-incubator body is raised to the first predetermined temperature 50 degrees Celsius, when continuing to heat, the method vacuumized is adopted in 3 minutes to be discharged by the part moisture content in pre-incubator body at the second scheduled time T12, then, be 2 minutes in first return-air time T13(the present embodiment) in pre-incubator body, recharge dry gas, the pressure in pre-incubator body is made to reach initial pressure, again in the 3rd scheduled time T21(5 minute, 3rd scheduled time can be identical with first scheduled time, also can not be identical, down together), the temperature in pre-incubator body is raised to the second predetermined temperature (the present embodiment is 75 degree), when continuing to heat, at the 4th scheduled time T22(3 minute, 4th scheduled time can be identical with second scheduled time, also can not be identical, lower with) in adopt the method vacuumized to be discharged by the part moisture content in pre-incubator body, then, in pre-incubator body, dry gas (2 minutes) is recharged in the second return-air time T23, the pressure in pre-incubator body is made to reach initial pressure, circulation like this, when the n in the n-th scheduled time Tn1 and the (n+1)th scheduled time Tn2 and the n-th return-air time Tn3 equals 4, battery pole piece is risen to 100 degrees Celsius from 25 degrees Celsius by the positive good utilisation time of 40 minutes.Or/and
(21) vacuum transition step, by the vacuum transition casing corresponding to vacuum transition step, boost to substantially equal with the pressure in described pulse vacuum preheating casing, open the door in pulse vacuum preheating casing and between vacuum transition casing, lithium ion battery or battery pole piece are moved in vacuum transition casing from pulse vacuum preheating casing, close the door between the excessive casing of vacuum and pulse vacuum preheating casing, take out true in substantially equal with the pressure in vaccum dewatering casing again, prepare lithium ion battery or battery pole piece to be transplanted in vaccum dewatering casing;
(2), high vacuum segmentation water removal phase, under the state of insulation, vaccum dewatering process is divided into the section of vacuumizing of more than three sections, from first paragraph, every section of Absolute truth reciprocal of duty cycle of taking out increases progressively successively, until the moisture content of lithium ion battery or battery pole piece is dropped to the first predetermined moisture.
Illustrate, if vaccum dewatering process is divided into the section of vacuumizing of ten sections, see Fig. 4, the Cn namely in Fig. 4, wherein n=10; So first paragraph C1 can vacuumize as the positive and negative 20Pa of Absolute truth reciprocal of duty cycle to 100 Pa, battery pole piece is proceeded to second segment C2 and continues to be evacuated to the positive and negative 20Pa of Absolute truth reciprocal of duty cycle to 80 Pa, then proceeds to the 3rd section of C3 and continue to be evacuated to the positive and negative 10Pa of Absolute truth reciprocal of duty cycle to 70 Pa; Proceed to the 4th section (not shown in FIG.) again to continue to be evacuated to the positive and negative 10Pa of Absolute truth reciprocal of duty cycle to 60 Pa; So analogize, until reach the tenth section of Cn, n=10, to reach production engineering specifications.
(31), cooled transition step, by the cooled transition casing corresponding to cooled transition step, be evacuated to substantially equal with the pressure in described vaccum dewatering casing, open the door in vaccum dewatering casing and between cooled transition casing, lithium ion battery or battery pole piece are moved in cooled transition casing from vaccum dewatering casing, close the door between undercooling casing and vaccum dewatering casing, with protective gas, the pressure in cooled transition casing is raised to normal pressure, prepares lithium ion battery or battery pole piece to be transplanted in cooling box;
(3), quick cooling step, cooling medium is inputted in the interlayer of cooling box, and internal circulation apparatus is set in cooling box, the cold air of interlayer inwall is evenly spread in cooling box, the temperature of lithium ion battery or battery pole piece is dropped to the second predetermined temperature.In the present invention, cooling medium can liquid cooling medium as water or salt solution; Also can gas cooling medium, as cold air etc.
(4), open cooling box and concentration difference and leave standstill door between casing, lithium ion battery in cooling box or battery pole piece are sent into concentration difference to be left standstill in casing, leave standstill in casing in described concentration difference, remove lithium ion battery or battery pole piece moisture further by concentration difference water-eliminating method, make the moisture of lithium ion battery or battery pole piece drop to the second predetermined moisture.In the present embodiment, described concentration difference water-eliminating method leaves standstill on casing in concentration difference at least to arrange drier and a circulating fan, and in drier, be provided with drier, the gas that described circulating fan makes concentration difference leave standstill in casing constantly circulates through drier.Or/and described concentration difference water-eliminating method is also included in concentration difference leave standstill the degasifier arranged in casing, in degasifier, be provided with deoxidier, the gas that described circulating fan makes concentration difference leave standstill in casing constantly circulates through deoxidier.
(12), discharging, the lithium ion battery after concentration difference process or battery pole piece, sealing state under be admitted to next procedure, for coating line, next procedure can be slicing process, and for battery, next procedure can fluid injection operation.
Above-mentioned quick cooling and concentration difference stating step first cool to leave standstill afterwards, and described quick cooling and concentration difference stating step also can be first leave standstill rear cooling, and like this in the standing link process condition of high temperature, its water removal effect is better, and it comprises:
Open vaccum dewatering casing and concentration difference and leave standstill door between casing (need concentration difference to leave standstill pressure adjusting to substantially equal with the pressure in vaccum dewatering casing) in casing, the lithium ion battery in vaccum dewatering casing or battery pole piece are sent into concentration difference and leaves standstill in casing; At M doubly within the total time that pulse vacuum preheating casing is used, wherein, best M=1,2 or 3, removes lithium ion battery or battery pole piece moisture further by concentration difference water-eliminating method, makes the moisture of lithium ion battery or battery pole piece drop to the second predetermined moisture;
Pressure concentration difference left standstill in casing is adjusted to normal pressure, open concentration difference and leave standstill door between casing and cooling box, concentration difference is left standstill lithium ion battery in casing or battery pole piece is sent in cooling box, and cooling medium is inputted in cooling box, at M doubly within the total time that pulse vacuum preheating casing is used, wherein, preferably M=1,2 or 3, drops to the second predetermined temperature by the temperature of lithium ion battery or battery pole piece.
In the present invention, described quick cooling and concentration difference stating step can also carry out as follows, and namely cooling limit in limit leaves standstill and dewaters, and comprises the steps:
Open vaccum dewatering casing and concentration difference and leave standstill door between casing, the lithium ion battery in vaccum dewatering casing or battery pole piece are sent into concentration difference and to leave standstill in casing (need concentration difference to leave standstill pressure adjusting to substantially equal with the pressure in vaccum dewatering casing) in casing; At M doubly within the total time that pulse vacuum preheating casing is used, wherein, preferably M=1,2 or 3, removes lithium ion battery or battery pole piece moisture further by concentration difference water-eliminating method, makes the moisture of lithium ion battery or battery pole piece drop to the second predetermined moisture; And in cooling box, input cooling medium simultaneously, the temperature of lithium ion battery or battery pole piece is dropped to the second predetermined temperature.
In the present invention, described concentration difference water-eliminating method can be leave standstill on casing in concentration difference at least to arrange drier and a circulating fan, and in drier, be provided with drier, the gas that described circulating fan makes concentration difference leave standstill in casing constantly circulates through drier; Also can be leave standstill casing circulation to described concentration difference to input the moisture content that produced by the gas dry station dry gas lower than 5ppm, leave standstill in casing in concentration difference and circulate, utilize moisture content to take away moisture content in lithium ion battery or battery pole piece further lower than the dry gas of 5ppm.
Preferably, described second predetermined temperature is between 25 degrees Celsius to 60 degrees Celsius.
Preferably, described second predetermined moisture is between 10ppm to 200ppm.
In the present embodiment, described drier can adopt quick lime or silica gel; Described deoxidier can adopt iron powder series deoxidier etc.
Claims (10)
1. a method for tunnel type baking lithium ion battery or battery pole piece, is characterized in that: at least comprise pulse vacuum preheating step or/and high vacuum segmentation water removal phase, wherein,
(1), pulse vacuum preheating step, within first scheduled time, the temperature in pre-incubator body is raised to the first predetermined temperature, when continuing to heat, within second scheduled time, adopt the method vacuumized to be discharged by the part moisture content in pre-incubator body, then, in pre-incubator body, recharge dry gas, make the pressure in pre-incubator body reach initial pressure; Within the 3rd scheduled time, the temperature in pre-incubator body is raised to the second predetermined temperature again, when continuing to heat, within the 4th scheduled time, adopt the method vacuumized to be discharged by the part moisture content in pre-incubator body, then, in pre-incubator body, recharge dry gas, make the pressure in pre-incubator body reach initial pressure; Circulation like this, until lithium ion battery in pre-incubator body or battery pole piece temperature reach technological design temperature; Or/and
(2), high vacuum segmentation water removal phase, under the state of insulation, vaccum dewatering process is divided into the section of vacuumizing of more than three sections, from first paragraph, every section of Absolute truth reciprocal of duty cycle of taking out increases progressively successively, until the moisture content of lithium ion battery or battery pole piece is dropped to the first predetermined moisture.
2. the method for tunnel type baking lithium ion battery according to claim 1 or battery pole piece, is characterized in that: also comprise,
(3), quick cooling step, cooling medium is inputted in the interlayer of cooling box, and internal circulation apparatus is set in cooling box, the cold air of interlayer inwall is evenly spread in cooling box, the temperature of lithium ion battery or battery pole piece is dropped to the second predetermined temperature.
3. the method for tunnel type baking lithium ion battery according to claim 1 and 2 or battery pole piece, it is characterized in that: after described (3) step, be also provided with concentration difference stating step, leave standstill in casing in described concentration difference, remove lithium ion battery or battery pole piece moisture further by concentration difference water-eliminating method, make the moisture of lithium ion battery or battery pole piece drop to the second predetermined moisture.
4. the tunnel type baking lithium ion battery according to claim 1,2 or 3 or the method for battery pole piece, it is characterized in that: between two adjacent steps of needs, be also provided with transition step, transition casing corresponding to described transition step is used for when the lithium ion battery needing reception to come from a upper casing or battery pole piece, first by the pressure adjusting in described transition casing to substantially equal with the pressure in a described upper casing; After lithium ion battery or battery pole piece are received and come, then by the pressure adjusting in transition casing to substantially equal with the pressure in next casing, and lithium ion battery or battery pole piece are sent in next casing described.
5. the method for tunnel type baking lithium ion battery according to claim 4 or battery pole piece, it is characterized in that: before described (1) step, when pre-temperature transition casing corresponding to described pre-temperature transition step is for receiving the lithium ion battery or battery pole piece of coming from a upper operation at ambient pressure, the pressure in described pre-temperature transition casing is substantially equal with atmospheric pressure; After lithium ion battery or battery pole piece are received and come, then by the pressure adjusting in pre-temperature transition casing to substantially equal with the pressure in described pre-incubator body, and lithium ion battery or battery pole piece are sent in described pre-incubator body.
6. the tunnel type baking lithium ion battery according to claim 1,2 or 3 or the method for battery pole piece, it is characterized in that: before described (1) step, be provided with pre-temperature transition step, when pre-temperature transition casing corresponding to described pre-temperature transition step is for receiving the lithium ion battery or battery pole piece of coming from a upper operation at ambient pressure, the pressure in described pre-temperature transition casing is substantially equal with atmospheric pressure; After lithium ion battery or battery pole piece are received and come, then by the pressure adjusting in pre-temperature transition casing to substantially equal with the pressure in described pre-incubator body, and lithium ion battery or battery pole piece are sent in described pre-incubator body.
7. the method for tunnel type baking lithium ion battery according to claim 3 or battery pole piece, it is characterized in that: described concentration difference water-eliminating method leaves standstill on casing in concentration difference at least to arrange drier and a circulating fan, in drier, be provided with drier, the gas that described circulating fan makes concentration difference leave standstill in casing constantly circulates through drier.
8. the method for tunnel type according to claim 3 baking lithium ion battery or battery pole piece, is characterized in that: leave standstill casing circulation to described concentration difference and input the moisture content that produced by the gas dry station dry gas lower than 5ppm.
9. the method for tunnel type baking lithium ion battery according to claim 3 or battery pole piece, it is characterized in that: described concentration difference water-eliminating method is also included in concentration difference and leaves standstill the degasifier that casing is arranged, in degasifier, be provided with deoxidier, the gas that described circulating fan makes concentration difference leave standstill in casing constantly circulates through deoxidier.
10. the tunnel type baking lithium ion battery according to claim 1,2 or 3 or the method for battery pole piece, is characterized in that: described second predetermined temperature is between 20 degrees Celsius to 60 degrees Celsius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832403.2A CN104913601A (en) | 2014-12-29 | 2014-12-29 | Method for baking lithium ion battery or battery pole piece in tunnel mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832403.2A CN104913601A (en) | 2014-12-29 | 2014-12-29 | Method for baking lithium ion battery or battery pole piece in tunnel mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104913601A true CN104913601A (en) | 2015-09-16 |
Family
ID=54082873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410832403.2A Pending CN104913601A (en) | 2014-12-29 | 2014-12-29 | Method for baking lithium ion battery or battery pole piece in tunnel mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104913601A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099046A (en) * | 2016-08-19 | 2016-11-09 | 深圳市信宇人科技有限公司 | Lithium is from the continuous complete automatic assembly line of battery pole piece |
| CN106288665A (en) * | 2016-08-19 | 2017-01-04 | 东莞市超业精密设备有限公司 | A kind of vacuum drying process |
| CN107178973A (en) * | 2017-07-12 | 2017-09-19 | 湖南艾威尔新能源科技有限公司 | Graphene pole piece material baking system |
| CN107270658A (en) * | 2017-06-15 | 2017-10-20 | 吴江市松陵电器设备有限公司 | A kind of energy-efficient interior heating, vacuum baking intelligence system |
| WO2018054234A1 (en) * | 2016-09-22 | 2018-03-29 | Grst International Limited | Method of drying electrode assemblies |
| CN111780500A (en) * | 2019-04-04 | 2020-10-16 | 苏州合乾新能源科技有限公司 | Low-energy-consumption high-efficiency vacuum baking process for lithium battery positive plate |
| CN112648833A (en) * | 2020-12-24 | 2021-04-13 | 常德中科多源电力融合技术研究院 | Method for drying three-dimensional convolution type lithium ion battery pole piece |
| CN113433986A (en) * | 2021-06-30 | 2021-09-24 | 广东利元亨智能装备股份有限公司 | Temperature control method, oven, electronic device and readable storage medium |
| CN114740925A (en) * | 2022-04-20 | 2022-07-12 | 中国电子科技集团公司第三十八研究所 | Off-line control method for water vapor in electronic device |
| CN114777427A (en) * | 2022-05-10 | 2022-07-22 | 星恒电源股份有限公司 | Drying method of square laminated lithium ion battery cell |
| CN115540518A (en) * | 2021-06-30 | 2022-12-30 | 广东利元亨智能装备股份有限公司 | Baking method and application thereof |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3838526A (en) * | 1973-05-14 | 1974-10-01 | Mac Eng & Equip | Method of drying battery plates |
| CN2636170Y (en) * | 2003-05-23 | 2004-08-25 | 咸阳绿世纪生化有限公司 | Drying box capable of recovering reagent |
| CN101261073A (en) * | 2008-04-15 | 2008-09-10 | 中国农业大学 | Drum-type vacuum pulsing temperature-variable drying method and apparatus |
| CN101692402A (en) * | 2009-09-24 | 2010-04-07 | 保定天威集团有限公司 | Method and device for drying large-scale power transformer |
| CN201447502U (en) * | 2009-05-11 | 2010-05-05 | 钟肇兰 | Continuous vacuum coater with multiple chambers |
| CN201589495U (en) * | 2010-01-18 | 2010-09-22 | 山东天力干燥设备有限公司 | Multifunctional intermittent drying system of freeze-spray granulation fluidized bed |
| CN101956047A (en) * | 2010-10-18 | 2011-01-26 | 北京有色金属研究总院 | Large vacuum annealing furnace |
| CN201801582U (en) * | 2010-09-14 | 2011-04-20 | 普乐新能源（蚌埠）有限公司 | Magnetron sputtering vacuum coating unit |
| CN102110803A (en) * | 2011-01-28 | 2011-06-29 | 福建南平南孚电池有限公司 | Drying method for positive electrode material of lithium ion battery |
| CN102589265A (en) * | 2012-02-21 | 2012-07-18 | 山东润工自动化设备有限公司 | Tunnel vacuum drying equipment |
| CN202501728U (en) * | 2012-02-10 | 2012-10-24 | 周跃云 | Microwave vacuum drying machine |
| CN102881763A (en) * | 2011-07-11 | 2013-01-16 | 刘莹 | Equipment for manufacturing back electrode of crystalline silicon solar cell by laser sintering |
| CN203159705U (en) * | 2013-02-07 | 2013-08-28 | 江苏夏博士节能工程股份有限公司 | Continuous coating equipment for metal foil |
| CN103591777A (en) * | 2013-11-29 | 2014-02-19 | 深圳市信宇人科技有限公司 | Combined type vacuum oven suitable for being used in lithium battery processing process |
| CN104061761A (en) * | 2014-06-26 | 2014-09-24 | 深圳市信宇人科技有限公司 | Method for drying lithium ion battery or battery pole piece |
| CN104134777A (en) * | 2014-06-12 | 2014-11-05 | 深圳市信宇人科技有限公司 | High-efficiency deep water removal method and drying line for lithium ion battery or battery pole piece |
-
2014
- 2014-12-29 CN CN201410832403.2A patent/CN104913601A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3838526A (en) * | 1973-05-14 | 1974-10-01 | Mac Eng & Equip | Method of drying battery plates |
| CN2636170Y (en) * | 2003-05-23 | 2004-08-25 | 咸阳绿世纪生化有限公司 | Drying box capable of recovering reagent |
| CN101261073A (en) * | 2008-04-15 | 2008-09-10 | 中国农业大学 | Drum-type vacuum pulsing temperature-variable drying method and apparatus |
| CN201447502U (en) * | 2009-05-11 | 2010-05-05 | 钟肇兰 | Continuous vacuum coater with multiple chambers |
| CN101692402A (en) * | 2009-09-24 | 2010-04-07 | 保定天威集团有限公司 | Method and device for drying large-scale power transformer |
| CN201589495U (en) * | 2010-01-18 | 2010-09-22 | 山东天力干燥设备有限公司 | Multifunctional intermittent drying system of freeze-spray granulation fluidized bed |
| CN201801582U (en) * | 2010-09-14 | 2011-04-20 | 普乐新能源（蚌埠）有限公司 | Magnetron sputtering vacuum coating unit |
| CN101956047A (en) * | 2010-10-18 | 2011-01-26 | 北京有色金属研究总院 | Large vacuum annealing furnace |
| CN102110803A (en) * | 2011-01-28 | 2011-06-29 | 福建南平南孚电池有限公司 | Drying method for positive electrode material of lithium ion battery |
| CN102881763A (en) * | 2011-07-11 | 2013-01-16 | 刘莹 | Equipment for manufacturing back electrode of crystalline silicon solar cell by laser sintering |
| CN202501728U (en) * | 2012-02-10 | 2012-10-24 | 周跃云 | Microwave vacuum drying machine |
| CN102589265A (en) * | 2012-02-21 | 2012-07-18 | 山东润工自动化设备有限公司 | Tunnel vacuum drying equipment |
| CN203159705U (en) * | 2013-02-07 | 2013-08-28 | 江苏夏博士节能工程股份有限公司 | Continuous coating equipment for metal foil |
| CN103591777A (en) * | 2013-11-29 | 2014-02-19 | 深圳市信宇人科技有限公司 | Combined type vacuum oven suitable for being used in lithium battery processing process |
| CN104134777A (en) * | 2014-06-12 | 2014-11-05 | 深圳市信宇人科技有限公司 | High-efficiency deep water removal method and drying line for lithium ion battery or battery pole piece |
| CN104061761A (en) * | 2014-06-26 | 2014-09-24 | 深圳市信宇人科技有限公司 | Method for drying lithium ion battery or battery pole piece |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099046A (en) * | 2016-08-19 | 2016-11-09 | 深圳市信宇人科技有限公司 | Lithium is from the continuous complete automatic assembly line of battery pole piece |
| CN106288665A (en) * | 2016-08-19 | 2017-01-04 | 东莞市超业精密设备有限公司 | A kind of vacuum drying process |
| CN106099046B (en) * | 2016-08-19 | 2018-11-09 | 深圳市信宇人科技股份有限公司 | The continuous complete automatic assembly line of electrodes of lithium-ion batteries |
| WO2018054234A1 (en) * | 2016-09-22 | 2018-03-29 | Grst International Limited | Method of drying electrode assemblies |
| US10254043B2 (en) | 2016-09-22 | 2019-04-09 | Grst International Limited | Method of drying electrode assemblies |
| CN107270658A (en) * | 2017-06-15 | 2017-10-20 | 吴江市松陵电器设备有限公司 | A kind of energy-efficient interior heating, vacuum baking intelligence system |
| CN107178973A (en) * | 2017-07-12 | 2017-09-19 | 湖南艾威尔新能源科技有限公司 | Graphene pole piece material baking system |
| CN111780500A (en) * | 2019-04-04 | 2020-10-16 | 苏州合乾新能源科技有限公司 | Low-energy-consumption high-efficiency vacuum baking process for lithium battery positive plate |
| CN112648833A (en) * | 2020-12-24 | 2021-04-13 | 常德中科多源电力融合技术研究院 | Method for drying three-dimensional convolution type lithium ion battery pole piece |
| CN113433986A (en) * | 2021-06-30 | 2021-09-24 | 广东利元亨智能装备股份有限公司 | Temperature control method, oven, electronic device and readable storage medium |
| CN115540518A (en) * | 2021-06-30 | 2022-12-30 | 广东利元亨智能装备股份有限公司 | Baking method and application thereof |
| CN115540518B (en) * | 2021-06-30 | 2024-03-15 | 广东利元亨智能装备股份有限公司 | Baking method and application thereof |
| CN114740925A (en) * | 2022-04-20 | 2022-07-12 | 中国电子科技集团公司第三十八研究所 | Off-line control method for water vapor in electronic device |
| CN114740925B (en) * | 2022-04-20 | 2024-03-15 | 中国电子科技集团公司第三十八研究所 | Off-line control method for internal water vapor of electronic device |
| CN114777427A (en) * | 2022-05-10 | 2022-07-22 | 星恒电源股份有限公司 | Drying method of square laminated lithium ion battery cell |
| CN114777427B (en) * | 2022-05-10 | 2023-11-17 | 星恒电源股份有限公司 | Drying method for square laminated lithium ion battery cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104913601A (en) | Method for baking lithium ion battery or battery pole piece in tunnel mode | |
| CN104061761B (en) | The furnace drying method of lithium ion battery or battery pole piece | |
| CN204067485U (en) | The high efficiency degree of depth of lithium ion battery or battery pole piece dewaters baking line | |
| CN104142045B (en) | A kind of drying means of high-capacity lithium-ion power battery battery core | |
| CN105115250A (en) | Rapid drying method for lithium ion battery cell | |
| CN106123503B (en) | A kind of soft bag lithium ionic cell battery core quick baking technique | |
| CN105890291B (en) | A kind of drying means of high capacity lithium ion battery battery core | |
| CN203216244U (en) | Lithium-ion battery vacuum baking device | |
| CN112864463B (en) | Rapid baking method of square lithium ion battery | |
| CN105322232B (en) | Preparation method of electrochemical cell | |
| CN205784509U (en) | A kind of quick cooling system of lithium ion battery vacuum drying oven | |
| CN104325107A (en) | High-efficiency high-vacuum shaping equipment of conventional pressure casting metal (aluminum, zinc and copper) alloy and method | |
| CN204612451U (en) | A kind of vacuum drying oven for high-performance samarium-cobalt permanent-magnetic material sintering | |
| CN109420759B (en) | Process for improving mechanical property of 17-4PH material by using vacuum sintering furnace | |
| CN103700887A (en) | Lithium titanate battery opening formation device and opening formation method | |
| CN110425825B (en) | Drying method before liquid injection of lithium ion battery cell | |
| CN203733895U (en) | Opening forming device of lithium titanate battery | |
| CN106196906A (en) | A kind of dewatering for lithium-ion electric core and dehydration equipment | |
| CN203148169U (en) | Full-automatic vacuum drying production line | |
| CN112414013A (en) | Low-energy-consumption lithium battery core drying method | |
| CN108598580B (en) | Method for forming battery in vacuum | |
| CN112242566A (en) | Infiltration method of lithium ion battery | |
| CN105043041A (en) | Stainless steel baking oven | |
| CN206094757U (en) | A dewatering equipment for lithium ion cell | |
| CN105135863A (en) | Pressure change type warming method for warming box suitable for tunnel type baking line and warming box thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yang Zhiming Inventor after: Zhou Huamin Inventor before: Yang Zhiming |
|
| COR | Change of bibliographic data | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Longgang District of Shenzhen City, Guangdong province 518000 Dragon Street Huilong Po community hoffen (Longgang) Industrial Area No. 2 plant floor, two floor, third floor, four floor Applicant after: Shenzhen xinyuren Polytron Technologies Inc Address before: Lu Hongfeng Industrial Zone No. 38 Hui Pu Cun Longgang District of Shenzhen City, Guangdong Province, No. 1 518000 Applicant before: Shenzhen Xinyuren Technology Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150916 |
|
| WD01 | Invention patent application deemed withdrawn after publication |