CN109037760A - A kind of maintainable lithium-ion battery and its maintaining method - Google Patents
A kind of maintainable lithium-ion battery and its maintaining method Download PDFInfo
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- CN109037760A CN109037760A CN201810654473.1A CN201810654473A CN109037760A CN 109037760 A CN109037760 A CN 109037760A CN 201810654473 A CN201810654473 A CN 201810654473A CN 109037760 A CN109037760 A CN 109037760A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
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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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- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of maintainable lithium-ion batteries, including shell, electrode column, negative electrode tab, positive plate, diaphragm and electrolyte, wherein, at least one described electrode column is being equipped with the gas vent be connected with inside battery along its cylinder axial direction, the outer surface of the electrode column is equipped with screw thread, the outer nut for matching with it and being screwed on is connected on the electrode column, the outer nut is used as the connecting terminal of lithium ion battery；Gasket seal is additionally provided between the outer nut and electrode column.The present invention further discloses a kind of maintaining method of maintainable lithium-ion battery.Lithium ion battery and its maintaining method provided by the invention not only effectively improve the service life of lithium ion battery, and significantly reduce the calendar life cost of battery, so that lithium ion battery industry is realized benign development, while realizing the echelon of technical field of lithium ion truly and utilizing.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly to a kind of maintainable lithium-ion battery and its
Maintaining method.
Background technique
Lithium ion battery as new chemical energy storage device, have good cycle life, energy conservation and environmental protection, recycling and
Higher-security, alternative lead-acid accumulator are widely used in the consumer goods, the vehicles and energy storage market, thoroughly change existing
There is the situation using non-renewable energy resources such as gasoline, diesel oil, natural gases, there is vast potential for future development and social demand.It is based on
This, lithium ion battery becomes the most fast chemical cell of current growth rate.Consumer goods market it is substantially all use lithium-ion electric
Pond, and the application range of lithium ion battery also develops from miniaturization to large capacity, such as the power battery, too of new-energy automobile
The energy-storage battery and communication backup power supply of positive energy wind energy, monomer capacity develops to Ah ranks up to a hundred from mAh rank, from single battery
Develop using to battery pack system.But in the fast development like a raging fire of new energy lithium battery, equally also expose very much
The fast-developing pseudo- market pushed mainly by national policy of problem, especially new energy field.2017, China's new energy
Automobile volume of production and marketing 77.7 ten thousand, increase by 53.3%, lithium battery installed capacity about 44.5GWh on a year-on-year basis, but only accounts for new car sale ratio
It is 2.69%；2016 by by the end of June, 2017, China increase newly build and put into operation electrochemical energy storage installation scale reaches
1.35GW is 9.6 times of 2000~2015 accumulative installation scales, but the 2% (whole world of the ratio less than the total project of energy storage of installing
For 1.7%).Therefore the industries such as new-energy automobile, energy storage and low-speed electronic vehicle can not be supported to become strong by subsidy profit, it is only logical
Preferential policy is crossed, open qualification cancels new energy subsidy, allows market full of competition, product is allowed to return essence, it is most important that mention
The calendar life cost of high-lithium ion battery could allow market with more open posture, to meet new energy lithium ion battery
Into development track faster, more benign.
Currently, traditional lithium battery is mostly the state being fully sealed, the main reason is that after lithium battery encapsulation charging,
It is not readily accessible to air and moisture, but in this way after a period of time, inside battery can generate pernicious gas and electrolyte can be gradually
It reduces, eventually leads to battery life rapid decay, this lithium battery does not have maintaining method, and user can only use always until battery
Or the life termination of battery pack.And the echelon utilization that new energy field refers at present, also only in lithium battery module or system
At the end of service life is fast, lithium battery or module are re-started into sorting, by the matching again of better performances, used in it is other require it is lower
The application field of level-one uses, and is essentially to complete combo again, and be not belonging to battery maintenance scope.
In addition, also there are some batteries that can be safeguarded at present, but it is that check valve is arranged on battery case,
Such structure can only be vented, and can not carry out the supplement or replacement of electrolyte, and the structure of check valve is because of the air pressure range of restriction
It is narrow, be extremely difficult to ideal exhaust effect, and because check valve through normally open, cause in the gas excluded with strong
Acid, the electronic equipment on corrosion cell periphery, or even cause short circuit.Therefore, a kind of maintainable lithium-ion battery how is developed, is led to
It crosses using reasonable maintaining method, reduces the calendar life cost of lithium ion battery, become for current those skilled in the art
The problem of urgent need to resolve.
Summary of the invention
In view of this, can further be promoted the present invention provides a kind of maintaining lithium ion battery and its maintaining method
Lithium ion battery preferably completes energy-saving and emission-reduction in the specific gravity of new energy field and the service life of promotion lithium ion battery
Strategic target.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of maintainable lithium-ion battery, including shell, electrode column, negative electrode tab, positive plate, diaphragm and electrolyte, at least
One electrode column is being equipped with the gas vent be connected with inside battery, the appearance of the electrode column along its cylinder axial direction
Face is equipped with screw thread, is connected with the outer nut for matching with it and being screwed on the electrode column, the outer nut is as lithium-ion electric
The connecting terminal in pond uses；It is additionally provided with gasket seal between the outer nut and electrode column, realizes the complete of the gas vent
Sealing.
The present invention by adopting the above technical scheme have the beneficial effect that the present invention by setting vent structure, work as lithium ion
Gas vent can be made to be connected with inside battery by dismantling sealing structure when guaranteeing vent hole seal when battery use, and safeguarding,
It uses in lithium ion battery to after the regular period, gas, supplement or replacement electricity that inside battery generates can be excluded by this hole
Liquid is solved, while by being finally reached after lithium battery or lithium battery module, system equalization processing and significantly having promoted lithium-ion electric
The effect of pond service life.
Further, the lithium ion battery structure is rectangular, cylindrical or oval.
Further, the vent shape is round, rectangular or oval, has the function that exhaust conducting.
Further, the outer junction with the electrode column of the outer nut is coated with sealant, further ensures outer
The sealing effect of junction between nut and electrode column avoids moisture, oxygen etc. from entering inside lithium ion cell, to battery performance
Cause fatefulue destruction.
Further, the negative electrode material in the lithium ion battery is one of carbon material, carbon composite, lithium titanate
Or it is several.
Further, the positive electrode in the lithium ion battery is LiMn2O4, cobalt acid lithium, nickel-cobalt-manganese ternary, nickel cobalt aluminium
Ternary, nickel system binary, the one or more of lithium nickelate, LiFePO4, lithium titanate.
The present invention also provides a kind of methods for safeguarding above-mentioned lithium ion battery, comprising the following steps:
(1) maintainable lithium-ion battery group is discharged to 0~90% electrification state；
(2) disassembly of above-mentioned battery pack is become into lithium-ion battery monomer, be shelved in drying shed；
(3) outer nut outside lower lithium-ion battery monomer electrode column is dismantled, and removes gasket seal；
It (4) is that lithium-ion battery monomer supplements electrolyte through gas vent according to the standard of 0.1~5g/Ah；
(5) above-mentioned lithium-ion battery monomer is stood 0 under vacuum conditions~for 24 hours；
(6) gasket seal is relay, then tightens outer nut.
The having the beneficial effect that of above-mentioned technical proposal is combined dismountable using gas vent, gasket seal, outer nut
Sealing structure can realize the maintenance to lithium ion battery, realize the gas that inside battery is generated exclude, supplement electrolyte or
The operation of removable parts electrolyte；Discharge operation is carried out by the lithium ion battery safeguarded to needs and places the behaviour of drying shed
Make, eliminates the influence of oxygen and moisture to material in battery；By supplementing electrolyte according to certain standard, electricity is avoided the occurrence of
Solution liquid supplement is insufficient or the excessive situation for causing battery performance bad；By the way that lithium-ion battery monomer is quiet under vacuum conditions
It sets, is released the gas in battery completely, and absorb electrolyte sufficiently by battery, finally realize and promote making for lithium battery
It is more than one times or more of function and effect with the service life.
Further, the dew point in the drying shed is 0~-70 DEG C, could sufficiently only under this air humidity
Eliminate influence of the moisture to lithium ion battery.
Further, the step (6) is completed by manipulator under vacuum conditions, sufficiently excludes the intracorporal gas of battery cavities
Body, the performance after promoting cell sealing.
Further, it after outer nut is tightened in the step (6), then applies and is covered in the junction of itself and the electrode column
Sealant guarantees sealing effect.
It can be seen via above technical scheme that compared with prior art, the invention discloses a kind of maintainable lithium-ion electricity
Pond not only effectively improves the service life of lithium ion battery, but also has significantly saved cost, makes lithium ion battery row
Industry realizes benign development.The maintaining method of lithium ion battery in the present invention simultaneously is hard material suitable for shell
Battery can make up lithium battery because producing gas, electrolyte loss or generating by exhaust, supplement or the mode for replacing electrolyte
The decline of battery performance caused by electrolyte decomposition object.Using lithium ion battery maintaining method of the invention, lithium battery can be promoted
2~3 times of service life, especially lithium titanate battery can achieve 5 times, considerably reduce the calendar life of lithium battery at
This.
In addition, the present invention is by safeguarding lithium ion battery, the continuation for enabling its function completely or partially to restore
It uses, and belongs to the basic at the same level or application that degrades, realize the echelon of technical field of lithium ion truly and utilize.
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
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of overall structure diagram of maintainable lithium-ion battery one of which embodiment of the present invention；
Fig. 2 is the concrete structure schematic diagram of Fig. 1 embodiment of the present invention；
Fig. 3 is the specific structure sectional view of Fig. 1 embodiment of the present invention；
Fig. 4 is a kind of concrete structure schematic diagram of maintainable lithium-ion battery another kind embodiment of the present invention；
Fig. 5 is the specific structure sectional view of Fig. 4 embodiment of the present invention；
Fig. 6 is that lithium ion battery of the present invention safeguards the test result compared with the cycle life that do not safeguard.
In figure, 1- electrode column, 11- gas vent, 12- screw thread；2- outer nut；3- gasket seal.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
As shown in Figure 1-3, the lithium ion battery is cylinder the embodiment of the invention discloses a kind of maintainable lithium-ion battery
Shape structure comprising shell, electrode column 1, negative electrode tab, positive plate, diaphragm and electrolyte, in one of them of the lithium ion battery
Electrode column 1 is equipped with a circular exhausting-gas hole 11 be connected with inside battery, the appearance of electrode column 1 along its cylinder axial direction
Face is equipped with screw thread 12, is connected with the outer nut 2 for matching with it and being screwed on electrode column 1, which is used as lithium ion battery
Connecting terminal use, the series-parallel of lithium ion battery can be completed；Sealing is additionally provided between outer nut 2 and electrode column 1
Gasket 3 realizes being fully sealed for gas vent 11.
A kind of maintainable lithium-ion battery of the present invention is being rendered as between outer nut 2 and electrode column 1 under normal operating condition
The state of complete mechanical sealing, after the lithium ion battery was used to the regular period, inside battery, which generates some side reactions, to disappear
It consumes partial electrolyte liquid and generates pernicious gas, staff can unscrew outer nut 2 at this time, because of gas vent 11 and electricity
It is conducted inside pond, therefore the gas that staff can be generated inside lithium ion cell by gas vent 11 excludes, and goes forward side by side
One step supplements electrolyte or removable parts electrolyte, can increase substantially lithium battery or lithium battery module, system in this way
Service life.
The present embodiment is also outside outer nut 2 and the junction of electrode column 1 is coated with sealant, further, ensure that outer
The sealing effect of junction between nut 2 and electrode column 1 avoids lithium ion battery moisture, oxygen in normal use process
Equal foreign matters enter inside lithium ion cell, cause fatefulue destruction to battery performance.
Negative electrode material in the present embodiment in lithium ion battery be one of carbon material, carbon composite, lithium titanate or
It is several, positive electrode be LiMn2O4, cobalt acid lithium, nickel-cobalt-manganese ternary, nickel cobalt aluminium ternary, nickel system binary, lithium nickelate, LiFePO4,
The one or more of lithium titanate.
Gas vent 11 in the present embodiment is circle, but it can also be rectangular, oval etc. other shapes.
Only an electrode column 1 in lithium ion battery is equipped with gas vent 11 in the present embodiment, but on two electrode columns
The case where equipped with gas vent, is also in the column of protection of the invention.
A kind of maintaining method of maintainable lithium-ion battery in the present embodiment, comprising the following steps:
(1) maintainable lithium-ion battery group is discharged to 0~90% electrification state；
(2) disassembly of above-mentioned battery pack is become into lithium-ion battery monomer, be shelved in drying shed, the dew point model in drying shed
Enclose is 0~-70 DEG C；
(3) outer nut 2 outside lower lithium-ion battery monomer electrode column 1 is dismantled, and removes gasket seal 3；
It (4) is that lithium-ion battery monomer supplements electrolyte through gas vent 11 according to the standard of 0.1~5g/Ah；
(5) above-mentioned lithium-ion battery monomer is stood 0 under vacuum conditions~for 24 hours；
(6) upper gasket seal 3 is relay by manipulator under vacuum conditions, then tightens outer nut 2, finally again in outer nut
2 apply with the junction of electrode column 1 and are covered with sealant.
After maintainable lithium-ion battery group is discharged to 0~90% electrification state by above-mentioned maintaining method in step (1), when
When gas vent 11 is in contact with outside air, battery is because electrification state is low, and the level of activity of pole piece is low, oxygen a small amount of in a short time
Enter inside battery by gas vent 11, the performance of battery is not influenced substantially.
Battery pack disassembly is become lithium-ion battery monomer in step (2) by above-mentioned maintaining method, is shelved in drying shed,
And the dew point in drying shed is limited to 0~-70 DEG C, air, which is avoided, by gas vent 11 enters battery compartment.Air
Middle moisture content is excessive, will lead to the deterioration of battery performance.Control the humidity dew point of environment, performance of the micro moisture to battery
Also it does not influence substantially.
Above-mentioned maintaining method in step (4) according to the standard of 0.1~5g/Ah through gas vent 11 be lithium-ion battery monomer
The purpose of supplement electrolyte is to guarantee that the amount of battery electrolyte inside is not too high or too low.Once will draw because reservoir quantity is insufficient
Play the problems such as battery capacity is relatively low, internal resistance is bigger than normal and expansion；And reservoir quantity excessively will affect positive and negative electrode and the close of diaphragm connects
Touching, to influence the performance of battery.
Lithium-ion battery monomer stands 0 by above-mentioned maintaining method under vacuum conditions in step (5)~purpose for 24 hours
It is to ensure that the gas in battery is released completely, and absorbs electrolyte sufficiently by battery.
Above-mentioned maintaining method is completed by manipulator under vacuum conditions in step (6), is to eliminate electricity to the greatest extent
Influence of the intracorporal gas of cell cavity to battery performance.
Embodiment 2:
As illustrated in figures 4-5, the embodiment of the invention discloses a kind of maintainable lithium-ion battery, which is rectangular
Structure comprising shell, electrode column 1, negative electrode tab, positive plate, diaphragm and electrolyte, in two electrode columns of the lithium ion battery
1 is equipped with the circular exhausting-gas hole be connected with inside battery 11 along its cylinder axial direction, on the outer surface of electrode column 1
Equipped with screw thread 12, the outer nut 2 for matching with it and being screwed on is connected on electrode column 1, the connecing as lithium ion battery of outer nut 2
Line terminals use, and can complete the series-parallel of lithium ion battery；Gasket seal is additionally provided between outer nut 2 and electrode column 1
3, realize being fully sealed for gas vent 11.
It is equipped with gas vent 11 on two electrode columns 1 in the present embodiment in lithium ion battery, it can also be using only one
Band gas vent, mode of another electrode column without gas vent on a electrode column.
The other structures of lithium ion battery and its maintaining method are in the same manner as in Example 1 in the present embodiment, therefore herein
No longer excessively repeat.
Related inspection is carried out below for the sample for the maintainable lithium-ion battery that the present invention is obtained through 2 technical solution of embodiment
Survey experiment, the specific battery using the technical program preparation are as follows: 50Ah laminated batteries, structure are rectangular aluminum hull, and material system is
Ferric phosphate lithium cell is recycled by following standard:
1, constant-current constant-voltage charging, 50A charging, by voltage 3.65V, by electric current 2.5A；
2, it shelves, time 10min；
3, constant-current discharge, electric current 50A, by voltage 2.5V；
4, it shelves, time 10min；
5, it recycles, from 1 to 4.
Fig. 6 is battery maintenance and test result (wherein, A representative maintenance battery, the B representative of non-maintenance cycle life span comparison
Do not safeguard battery):
It can be seen that lithium ion battery when recycling about 3100 times from above-mentioned loop-around data, in the case where not safeguarding, hair
The problem of raw capacity rapid decay.And when circulation reaches about 3000 times, by using the method that above-mentioned lithium battery is safeguarded, supplement
After a certain amount of electrolyte, circulating battery is in plateau, significantly improve the service life of lithium ion battery.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of maintainable lithium-ion battery, including shell, electrode column, negative electrode tab, positive plate, diaphragm and electrolyte, feature
It is, at least one described electrode column is being equipped with the gas vent be connected with inside battery, the electricity along its cylinder axial direction
The outer surface of pole is equipped with screw thread, and the outer nut for matching with it and being screwed on is connected on the electrode column, and the outer nut is made
It is used for the connecting terminal of lithium ion battery；It is additionally provided with gasket seal between the outer nut and electrode column, realizes the row
Stomata is fully sealed.
2. a kind of maintainable lithium-ion battery according to claim 1, it is characterised in that: the lithium ion battery structure is
It is rectangular, cylindrical or oval.
3. a kind of maintainable lithium-ion battery according to claim 1, it is characterised in that: the vent shape is circle
It is shape, rectangular or oval.
4. a kind of maintainable lithium-ion battery according to claim 1, it is characterised in that: the outer nut is outer with the electricity
The junction of pole is coated with sealant.
5. a kind of maintainable lithium-ion battery according to claim 1-4, it is characterised in that: the lithium-ion electric
Negative electrode material in pond is one or more of carbon material, carbon composite, lithium titanate.
6. a kind of maintainable lithium-ion battery according to claim 1-4, it is characterised in that: the lithium-ion electric
Positive electrode in pond be LiMn2O4, cobalt acid lithium, nickel-cobalt-manganese ternary, nickel cobalt aluminium ternary, nickel system binary, lithium nickelate, LiFePO4,
The one or more of lithium titanate.
7. a kind of maintaining method of maintainable lithium-ion battery, which comprises the following steps:
(1) maintainable lithium-ion battery group is discharged to 0~90% electrification state；
(2) disassembly of above-mentioned battery pack is become into lithium-ion battery monomer, be shelved in drying shed；
(3) outer nut outside lower lithium-ion battery monomer electrode column is dismantled, and removes gasket seal；
It (4) is that lithium-ion battery monomer supplements electrolyte through gas vent according to the standard of 0.1~5g/Ah；
(5) above-mentioned lithium-ion battery monomer is stood 0 under vacuum conditions~for 24 hours；
(6) gasket seal is relay, then tightens outer nut.
8. a kind of maintaining method of maintainable lithium-ion battery according to claim 7, it is characterised in that: the drying shed
Interior dew point is 0~-70 DEG C.
9. a kind of maintaining method of maintainable lithium-ion battery according to claim 7, it is characterised in that: the step
(6) it is completed under vacuum conditions by manipulator.
10. a kind of maintaining method of maintainable lithium-ion battery according to claim 7, it is characterised in that: the step
(6) it after outer nut is tightened in, then is applied in the junction of itself and the electrode column and is covered with sealant.
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| CN112382784A (en) * | 2020-11-14 | 2021-02-19 | 南京工业大学 | Nested structure lithium ion battery capable of reducing thermal runaway risk |
| CN114335783A (en) * | 2021-12-29 | 2022-04-12 | 星恒电源股份有限公司 | Method for realizing secondary service life of lithium ion battery and application |
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| CN104253262A (en) * | 2014-08-12 | 2014-12-31 | 中天储能科技有限公司 | Lithium ion battery liquid injection method |
| CN105655505A (en) * | 2016-03-10 | 2016-06-08 | 龙能科技（苏州）有限责任公司 | Maintainable cylindrical lithium-ion battery |
| CN107464912A (en) * | 2017-08-03 | 2017-12-12 | 桑顿新能源科技有限公司 | A kind of echelon utilizes soft-packaging lithium battery cores liquid replenishing method |
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| CN112382784A (en) * | 2020-11-14 | 2021-02-19 | 南京工业大学 | Nested structure lithium ion battery capable of reducing thermal runaway risk |
| CN114335783A (en) * | 2021-12-29 | 2022-04-12 | 星恒电源股份有限公司 | Method for realizing secondary service life of lithium ion battery and application |
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