CN107481863B - A kind of active carbon lithium titanate lithium-ion capacitor chemical synthesizing method - Google Patents
A kind of active carbon lithium titanate lithium-ion capacitor chemical synthesizing method Download PDFInfo
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- CN107481863B CN107481863B CN201710719582.2A CN201710719582A CN107481863B CN 107481863 B CN107481863 B CN 107481863B CN 201710719582 A CN201710719582 A CN 201710719582A CN 107481863 B CN107481863 B CN 107481863B
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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
- Y02E60/13—Energy storage using capacitors
Abstract
The embodiment of the invention discloses a kind of active carbon lithium titanate lithium-ion capacitor chemical synthesizing methods, comprising steps of providing the unclosed capacitor to be processed of liquid injection port and activating capacitor to be processed；Charge and discharge are carried out to capacitor to be processed and are recycled for several times；Decompression pumping is carried out to the capacitor to be processed for completing above-mentioned steps and carries out sealing treatment at liquid injection port.The present invention pre-processes active carbon lithium titanate lithium-ion capacitor using above-mentioned steps, first activate, then the surface oxygen functional group of lithium-ion capacitor internal moisture and active carbon is sufficiently consumed the multiple cycle charge-discharge of active carbon lithium titanate lithium-ion capacitor, finally the gas of generation is discharged, to prevent active carbon lithium titanate lithium-ion capacitor flatulence phenomenon, guarantee lithium-ion capacitor capacity, improve cyclical stability, and above-mentioned steps are easy to operate, it is at low cost, practical application can be carried out in industrialization on a large scale.
Description
Technical field
This application involves capacitor manufacturing technology fields more particularly to a kind of active carbon lithium titanate lithium-ion capacitor to be melted into
Method.
Background technique
Active carbon lithium titanate lithium-ion capacitor is because of the advantages that it has a safety feature, and circulating ratio performance is good, it has also become mesh
The hot spot of preceding researcher's concern.And in actual some research work, researcher has found that lithium titanate material is hygroscopic, certain
Under the conditions of can generate gas with reaction of moisture and flatulence phenomenon occur, to make the internal resistance of capacitor increase and then to influence its circulation steady
Qualitative, simultaneously because activated carbon surface has many oxygen-containing functional groups, in high potential redox reaction occurs for such functional group, produces
Angry body can also make flexible-packed battery flatulence phenomenon occur.
In the prior art, to solve the above problems, researcher mostly uses greatly adds metal oxide in electrolyte solution
Class gettering material is to improve the flatulence problem of active carbon lithium titanate lithium-ion capacitor, but effect is not obvious, and cost
It is high, while donor frenulum carrys out the problems such as energy force density is low and dispersion is uneven, the practical application being unfavorable in industrialization.
Summary of the invention
The embodiment of the invention provides a kind of active carbon lithium titanate lithium-ion capacitor chemical synthesizing methods, for improving active carbon
The flatulence phenomenon of lithium titanate lithium-ion capacitor, while preventing energy force density low and dispersing the problems such as uneven.
A kind of active carbon lithium titanate lithium-ion capacitor chemical synthesizing method, comprising:
The unclosed capacitor to be processed of liquid injection port is provided and activates the capacitor to be processed；
Charge and discharge are carried out to the capacitor to be processed and are recycled for several times；
Decompression pumping is carried out to the capacitor to be processed for completing above-mentioned steps and carries out sealing treatment at liquid injection port.
Preferably, described that the unclosed capacitor to be processed of liquid injection port is provided and wraps the capacitor activation to be processed
It includes:
The capacitor to be processed is provided, and is stood first time t1；
First voltage U is charged to the capacitor to be processed1, then it is discharged to second voltage U2, cycle-index n1。
Preferably, to the capacitor to be processed with the first electric current I1Constant-current charge is to first voltage U1, in first electricity
Press U1Lower second time of constant-voltage charge t2, then with the first electric current I1Constant-current discharge is to second voltage U2, cycle-index n1。
Preferably, the first time t1For 2min-20h, the second time t2For 3h-12h.
Preferably, it is described is carried out by charge and discharge and is recycled for the capacitor to be processed include: for several times
The capacitor to be processed after activation is stood into third time t3；
To the capacitor to be processed with the second electric current I2Charge to the first voltage U1, in the first voltage U1Under
Charge the 4th time t4, is again with the second electric current I2It is discharged to the second voltage U2, cycle-index n2, second electric current
I2Greater than the first electric current I1。
Preferably, the first electric current I1For 0.1A-3.3A, the second electric current I2For 0.5A-10A.
Preferably, the third time t3For 1s-60s, the 4th time t4For 2h-8h.
Preferably, the cycle-index n1For 5-10, n2For 10-200.
Preferably, described pair completion above-mentioned steps the capacitor to be processed carry out decompression pumping and at liquid injection port into
Row sealing treatment includes:
Aging process is carried out to the capacitor to be processed；
Decompression pumping simultaneously carries out sealing treatment at liquid injection port.
Preferably, the active carbon lithium titanate lithium-ion capacitor chemical synthesizing method carries out at room temperature, and the room temperature is 0
℃-40℃。
As can be seen from the above technical solutions, active carbon lithium titanate lithium-ion capacitor chemical synthesizing method packet provided by the invention
It includes step: the unclosed capacitor to be processed of liquid injection port being provided and activates capacitor to be processed；Capacitor to be processed is carried out
Charge and discharge simultaneously recycle for several times；Decompression pumping is carried out to the capacitor to be processed for completing above-mentioned steps and is sealed at liquid injection port
Processing.The present invention pre-processes active carbon lithium titanate lithium-ion capacitor using above-mentioned steps, first activates, then to activity
The multiple cycle charge-discharge of charcoal lithium titanate lithium-ion capacitor makes the surface of lithium-ion capacitor internal moisture and active carbon oxygen-containing
Functional group sufficiently consumes, and finally the gas of generation is discharged, and to prevent active carbon lithium titanate lithium-ion capacitor flatulence phenomenon, protects
Lithium-ion capacitor capacity is demonstrate,proved, improves cyclical stability, and above-mentioned steps are easy to operate, it is at low cost, it can be in production on a large scale
Practical application is carried out in industry.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is active carbon lithium titanate lithium-ion capacitor chemical synthesizing method one embodiment signal in the embodiment of the present invention
Figure；
Fig. 2 is second embodiment signal of active carbon lithium titanate lithium-ion capacitor chemical synthesizing method in the embodiment of the present invention
Figure；
Fig. 3 is active carbon lithium titanate lithium-ion capacitor chemical synthesizing method third embodiment signal in the embodiment of the present invention
Figure；
Fig. 4 is that active carbon lithium titanate lithium-ion capacitor is followed through existing chemical synthesizing method and after chemical synthesizing method of the present invention processing
Ring 1000 encloses contrast schematic diagram；
Fig. 5 is that treated through existing chemical synthesizing method and through chemical synthesizing method of the present invention for active carbon lithium titanate lithium-ion capacitor
Cycle-index-capacity curve contrast schematic diagram.
Specific embodiment
The embodiment of the invention provides a kind of active carbon lithium titanate lithium-ion capacitor chemical synthesizing methods, for improving active carbon
The flatulence phenomenon of lithium titanate lithium-ion capacitor, while preventing energy force density low and dispersing the problems such as uneven.
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present invention
The embodiment of the present invention is described in attached drawing.
The description and claims of this application and term " first ", " second ", " third ", " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so that the embodiments described herein can be in addition to illustrating herein
Or the sequence other than the content of description is implemented.In addition, term " includes " or " having " and its any deformation, it is intended that covering is not
Exclusive includes, for example, the process, method, system, product or equipment for containing a series of steps or units be not necessarily limited to it is clear
Step or unit those of is listed on ground, but is not clearly listed or for these process, methods, product or is set
Standby intrinsic other step or units.
In existing technical solution, uses and add metal oxide-type gettering material in electrolyte solution to improve activity
The flatulence problem of charcoal lithium titanate lithium-ion capacitor, but effect is not obvious, and with high costs, while donor frenulum carrys out energy
The problems such as force density is low and dispersion is uneven, the practical application being unfavorable in industrialization.
For ease of understanding, the detailed process of the embodiment of the present invention is described below, referring to Fig. 1, the present invention is implemented
Active carbon lithium titanate lithium-ion capacitor chemical synthesizing method one embodiment includes: in example
101, the unclosed capacitor to be processed of liquid injection port is provided and activates the capacitor to be processed.
Chemical conversion side of the invention is carried out to the capacitor before the liquid injection port closing of active carbon lithium titanate lithium-ion capacitor
Method, in order to which the gas of generation is discharged.Currently, the method for activation capacitor is mainly (right relative to step 102) with low current
The capacitor carries out charge and discharge repeatedly, thus avoid step 102 with caused when high current charge-discharge capacitor damage or
The lost of life.
102, charge and discharge are carried out to capacitor to be processed and recycled for several times.
As described above, (carrying out charge and discharge repeatedly relative to step 101) with larger current to the capacitor to be processed after activation
Electric treatment, multiple charge and discharge cycles can make the oxygen-containing functional group of the capacitor internal moisture and activated carbon surface sufficiently disappear
Consumption avoids continuing to generate gas after the liquid injection port closing of active carbon lithium titanate lithium-ion capacitor.
103, decompression pumping is carried out to the capacitor to be processed for completing above-mentioned steps and carries out sealing treatment at liquid injection port.
After completing above-mentioned two step, decompression pumping is carried out to capacitor to be processed, releases that the gas in electrolyte sufficiently
It puts, reduces residual, then carry out sealing treatment again, chemical synthesizing method terminates.
In the embodiment of the present invention, the unclosed capacitor to be processed of liquid injection port is provided and activates capacitor to be processed；It is right
Capacitor to be processed carries out charge and discharge and recycles for several times；To complete above-mentioned steps capacitor to be processed carry out decompression pumping and
Sealing treatment is carried out at liquid injection port.The present invention pre-processes active carbon lithium titanate lithium-ion capacitor using above-mentioned steps,
First activate, then to the multiple cycle charge-discharge of active carbon lithium titanate lithium-ion capacitor make lithium-ion capacitor internal moisture and
The surface oxygen functional group of active carbon sufficiently consumes, and finally the gas of generation is discharged, to prevent active carbon metatitanic acid lithium ion
Capacitor flatulence phenomenon guarantees lithium-ion capacitor capacity, improves cyclical stability, and above-mentioned steps are easy to operate, at low cost,
Practical application can be carried out in industrialization on a large scale.
Referring to Fig. 2, active carbon lithium titanate lithium-ion capacitor second embodiment packet of chemical synthesizing method of the embodiment of the present invention
It includes:
201, the capacitor to be processed is provided, and is stood first time t1。
Chemical conversion side of the invention is carried out to the capacitor before the liquid injection port closing of active carbon lithium titanate lithium-ion capacitor
Method, in order to which the gas of generation is discharged.Before the activation that is powered, first time t is now stood1, it is therefore intended that fill pole piece
Divide Electolyte-absorptive, to prevent condenser capacity and high rate performance from declining.
In the actual operation process, first time t1It can be 2min-20h, it is preferable that first time t1Preferably 1min-
30min, specifically, first time t1It can be 3min, 5min or 20min.
202, first voltage U is charged to the capacitor to be processed1, then it is discharged to second voltage U2, cycle-index
n1。
After liquid to be electrolysed sufficiently infiltrates pole piece, charging activation is carried out to capacitor to be processed, first to capacitor to be processed
The first voltage U of device charging1, such as the voltage rating of capacitor to be processed, then it is discharged to second voltage U2, U1> U2, so far
A charge and discharge process is completed, the above process is then recycled into n1It is secondary.
Further, for convenient for control, above-mentioned charge and discharge process uses constant-current constant-voltage charging, i.e., in the first stage with one
Constant current charging turns second stage such as when voltage reaches predetermined value and carries out constant-voltage charge, and electric current is gradually reduced at this time, works as electricity
Stream reaches when dropping to zero, and capacitor is completely filled with, specifically, in embodiments of the present invention, to capacitor to be processed with first
Electric current I1Constant-current charge is to first voltage U1, in first voltage U1Lower second time of constant-voltage charge t2, then with the first electric current I1Constant current
It is discharged to second voltage U2, cycle-index n1。
Specifically, above-mentioned first voltage U1Preferably 2.5V-3.2V, second voltage U2Preferably 1V-1.4V.
Second time t2For capacitor in activation constant voltage charging time, can be pacified according to capacitor particular capacity
Row, in embodiments of the present invention, is preferably controlled between 3h-12h, can be 6h or 8h specifically.
203, charge and discharge are carried out to capacitor to be processed and recycled for several times.
(I is greater than with larger current to the capacitor to be processed after activation1) carry out repeated charge processing, multiple charge and discharge
Electricity circulation can be such that the oxygen-containing functional group of the capacitor internal moisture and activated carbon surface sufficiently consumes, and avoid in active carbon metatitanic acid
Continue to generate gas after the liquid injection port closing of lithium ion capacitor.
204, decompression pumping is carried out to the capacitor to be processed for completing above-mentioned steps and carries out sealing treatment at liquid injection port.
After completing above-mentioned steps, decompression pumping is carried out to capacitor to be processed, discharges the gas in electrolyte sufficiently,
Residual is reduced, then carries out sealing treatment again, chemical synthesizing method terminates.
Referring to Fig. 3, active carbon lithium titanate lithium-ion capacitor chemical synthesizing method third embodiment packet of the embodiment of the present invention
It includes:
301, the capacitor to be processed is provided, and is stood first time t1。
Chemical conversion side of the invention is carried out to the capacitor before the liquid injection port closing of active carbon lithium titanate lithium-ion capacitor
Method, in order to which the gas of generation is discharged.Before the activation that is powered, first time t is now stood1, it is therefore intended that fill pole piece
Divide Electolyte-absorptive, to prevent condenser capacity and high rate performance from declining.
302, first voltage U is charged to the capacitor to be processed1, then it is discharged to second voltage U2, cycle-index
n1。
After liquid to be electrolysed sufficiently infiltrates pole piece, charging activation is carried out to capacitor to be processed, first to capacitor to be processed
Then the first voltage U1 of device charging, such as the voltage rating of capacitor to be processed are discharged to second voltage U2, U1 > U2, until
This completes a charge and discharge process, then recycles the above process n1 times.
303, the capacitor to be processed after activation is stood into third time t3。
After the completion of activation, capacitor to be processed is first stood into third time t3, so that it is stablized, third time t3It can root
It is adjusted according to actual conditions, in embodiments of the present invention, third time t3Preferably 1s-60s.
304, after above-mentioned capacitor is substantially stabilized, it is electrically operated to carry out cycle charge discharge to it, in embodiments of the present invention, with
Activate step similar, using constant-current constant-voltage charging, to capacitor to be processed with the second electric current I2Charge to first voltage U1,
In first voltage U1The 4th time t of lower charging4, then with the second electric current I2It is discharged to the second voltage U2, cycle-index n2,
The second electric current I2Greater than the first electric current I1.Specifically, in embodiments of the present invention, by the first electric current I1Control exists
Between 0.1A-3.3A, preferably 0.15A, by the second electric current I2Control is between 0.5A-10A, preferably 1A or 3A.
4th time t4It is capacitor in first voltage U1Under with the time of larger current constant-voltage charge, when relative to second
Between t2, capacitor can be full of within the shorter time, therefore, in embodiments of the present invention, the 4th time t4It can be controlled in 2h-
8h。
Above-mentioned technical proposal is advanced optimized, in above-mentioned steps, cycle-index n1For 5-10, n2For 10-200, can see
Out, it during step 304 carries out cycle charge-discharge to capacitor to be processed, needs to recycle repeatedly to guarantee gas as far as possible
More discharges, in embodiments of the present invention, cycle-index n1Further preferably 6 times, 8 times, cycle-index n2Preferably 50 times,
120 times.
305, decompression pumping is carried out to the capacitor to be processed for completing above-mentioned steps and carries out sealing treatment at liquid injection port.
After completing above-mentioned steps, decompression pumping is carried out to capacitor to be processed, discharges the gas in electrolyte sufficiently,
Residual is reduced, then carries out sealing treatment again, chemical synthesizing method terminates.
More specifically, step 305 specifically:
Aging process is carried out to capacitor to be processed；
Decompression pumping simultaneously carries out sealing treatment at liquid injection port.
It can be seen that after completion charge and discharge is electrically operated, not carrying out decompression pumping immediately in the third embodiment of the invention
Operation, but aging process first is carried out to capacitor, it is settled out, is then depressurized again and is evacuated and is sealed at liquid injection port
Mouth processing.The time of aging process is preferably 12h-72h.
Active carbon lithium titanate lithium-ion capacitor chemical synthesizing method provided by the several embodiments of the present invention at room temperature into
Row, the room temperature refer to 0 DEG C -40 DEG C.
Compare experiment below to further illustrate the active carbon lithium titanate lithium-ion capacitor chemical synthesizing method of the application.
Experimental example
Using active carbon as positive electrode, lithium titanate is negative electrode material.
The system lithium-ion capacitor is melted at normal temperature, 3min is stood, is then filled with the electric current constant current of 0.15A
Electricity recycles 8 times to 2.75V, then constant-voltage charge 8h then with 0.15A electric current constant-current discharge to 1V.It is filled again with the electric current constant current of 3A
Electricity to 2.6V, constant-current discharge to 1V recycles 120 times, depressurizes air extracting seal, activation finishes.
Reference examples
Using active carbon as positive electrode, lithium titanate is negative electrode material.
The system lithium-ion capacitor is stood 3min at normal temperature, 2.75V is charged to 1A electric current, then put with 1A electric current
Electricity recycles 8 times, air extracting seal activation finishes to 1V.
Lithium-ion capacitor after above-mentioned experimental example and reference examples chemical conversion is subjected to loop test (25A electric current), is please referred to
Fig. 4 and Fig. 5, Fig. 4 are active carbon lithium titanate lithium-ion capacitor through existing chemical synthesizing method and after chemical synthesizing method of the present invention processing
1000 circle contrast schematic diagram of circulation, Fig. 5 is active carbon lithium titanate lithium-ion capacitor through existing chemical synthesizing method and through the present inventionization
At method treated cycle-index-capacity curve contrast schematic diagram, left side A capacitor is reference examples, right side B capacitor in Fig. 4
Device is experimental example, and in Fig. 5, C curve is experimental example, and D curve is reference examples, it can be seen from the figure that embodiment is without obvious flatulence
Phenomenon occur, and recycle 3000 times after capacity with remain basically stable before, conservation rate is 99% or more.Reference examples have after 500 times
Flatulence phenomenon generates, and the capacity retention ratio after 3000 times is 30%.This shows using chemical synthesis technology provided in an embodiment of the present invention
Flatulence can be reduced, guaranteed capacity greatly improves the cycle performance of lithium-ion capacitor.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The above, above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although referring to before
Embodiment is stated the application is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (7)
1. a kind of active carbon lithium titanate lithium-ion capacitor chemical synthesizing method characterized by comprising
Capacitor to be processed is provided, and is stood first time t1；
To the capacitor to be processed with the first electric current I1Constant-current charge is to first voltage U1, in the first voltage U1Lower constant pressure
Charge the second time t2, then with the first electric current I1Constant-current discharge is to second voltage U2, cycle-index n1, the second time t2
For 3h-12h, the capacitor to be processed is activated；
The capacitor to be processed after activation is stood into third time t3；
To the capacitor to be processed with the second electric current I2Charge to the first voltage U1, the second electric current I2Greater than described
First electric current I1, in the first voltage U1The 4th time t of lower charging4, then with the second electric current I2It is discharged to second electricity
Press U2, cycle-index n2, the 4th time t4For 2h-8h；
The first voltage U1For 2.5V-3.2V, the second voltage U2For 1V-1.4V；
Decompression pumping is carried out to the capacitor to be processed for completing above step and carries out sealing treatment at liquid injection port.
2. active carbon lithium titanate lithium-ion capacitor chemical synthesizing method according to claim 1, which is characterized in that described first
Time t1For 2min-20h.
3. active carbon lithium titanate lithium-ion capacitor chemical synthesizing method according to claim 1 or 2, which is characterized in that described
First electric current I1For 0.1A-3.3A, the second electric current I2For 0.5A-10A.
4. active carbon lithium titanate lithium-ion capacitor chemical synthesizing method according to claim 1, which is characterized in that the third
Time t3For 1s-60s.
5. active carbon lithium titanate lithium-ion capacitor chemical synthesizing method according to claim 1, which is characterized in that the circulation
Frequency n1For 5-10, n2For 10-200.
6. active carbon lithium titanate lithium-ion capacitor chemical synthesizing method described in -2 and 4-5 any one according to claim 1, special
Sign is that the capacitor to be processed of described pair of completion above-mentioned steps carries out decompression pumping and carries out sealing part at liquid injection port
Reason includes:
Aging process is carried out to the capacitor to be processed；
Decompression pumping simultaneously carries out sealing treatment at liquid injection port.
7. active carbon lithium titanate lithium-ion capacitor chemical synthesizing method described in -2 and 4-5 any one according to claim 1, special
Sign is that the active carbon lithium titanate lithium-ion capacitor chemical synthesizing method carries out at room temperature, and the room temperature is 0 DEG C -40 DEG C.
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|---|---|---|---|---|
| CN101740816A (en) * | 2009-12-24 | 2010-06-16 | 苏州星恒电源有限公司 | Formation method of lithium ion secondary battery using lithium titanate as cathode |
| CN103259048A (en) * | 2013-05-22 | 2013-08-21 | 南京双登科技发展研究院有限公司 | Formation method for prolonging cycle life of lithium titanate battery |
| CN104409780A (en) * | 2014-12-12 | 2015-03-11 | 河北银隆新能源有限公司 | Forming method of lithium titanate battery |
| CN105449301A (en) * | 2015-12-30 | 2016-03-30 | 东风商用车有限公司 | Method for solving gas expansion failure of lithium titanate battery |
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2017
- 2017-08-21 CN CN201710719582.2A patent/CN107481863B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101740816A (en) * | 2009-12-24 | 2010-06-16 | 苏州星恒电源有限公司 | Formation method of lithium ion secondary battery using lithium titanate as cathode |
| CN103259048A (en) * | 2013-05-22 | 2013-08-21 | 南京双登科技发展研究院有限公司 | Formation method for prolonging cycle life of lithium titanate battery |
| CN104409780A (en) * | 2014-12-12 | 2015-03-11 | 河北银隆新能源有限公司 | Forming method of lithium titanate battery |
| CN105449301A (en) * | 2015-12-30 | 2016-03-30 | 东风商用车有限公司 | Method for solving gas expansion failure of lithium titanate battery |
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