CN203895566U - Cylindrical flexibly-packaged lithium titanate battery - Google Patents
Cylindrical flexibly-packaged lithium titanate battery Download PDFInfo
- Publication number
- CN203895566U CN203895566U CN201420133134.6U CN201420133134U CN203895566U CN 203895566 U CN203895566 U CN 203895566U CN 201420133134 U CN201420133134 U CN 201420133134U CN 203895566 U CN203895566 U CN 203895566U
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- CN
- China
- Prior art keywords
- battery
- cylindrical
- lithium titanate
- roll core
- liquid storage
- 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.)
- Expired - Fee Related
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 57
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000003860 storage Methods 0.000 claims abstract description 23
- 239000012785 packaging film Substances 0.000 claims abstract description 15
- 229920006280 packaging film Polymers 0.000 claims abstract description 15
- 239000003792 electrolyte Substances 0.000 claims abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- 230000004888 barrier function Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 6
- 102000004310 Ion Channels Human genes 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 2
- 239000004033 plastic Substances 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
- 206010016766 flatulence Diseases 0.000 description 18
- 229910001416 lithium ion Inorganic materials 0.000 description 8
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000001802 infusion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
Classifications
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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
-
- 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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- Secondary Cells (AREA)
Abstract
The utility model discloses a cylindrical flexibly-packaged lithium titanate battery, which aims at eliminating the negative effect caused by the inflation of the existing lithium battery. The cylindrical flexibly-packaged lithium titanate battery is characterized by comprising a cylindrical roll core which is formed by collectively rolling a positive pole piece, a negative pole piece and a diaphragm, wherein the cylindrical roll core is packed in an aluminum-plastic packaging film; and a liquid storage cavity which is used for decompressing and storing the liquid is also arranged in the aluminum-plastic packaging film, and a sealing layer is arranged between the liquid storage cavity and the cylindrical roll core. The cylindrical flexibly-packaged lithium titanate battery can be used for decompressing a lithium battery and replenishing electrolyte to the lithium battery, so that the negative problems such as inadequate electrolyte, increased internal resistance, rapidly decreasing of battery capacity, obstruction of ion channels and the like of the lithium battery caused by the inflation of the lithium battery can be fundamentally eliminated.
Description
Technical field
The utility model belongs to lithium battery field, is specifically related to a kind of cylindrical flexible package lithium titanate battery.
Background technology
World energy sources and Environmental Protection Situation day are becoming tight, and battery is more and more subject to people's favor as power source.Lithium ion battery is because its energy density is high, and volume is little, lightweight, environment friendly and pollution-free, and the remarkable advantages such as memory-less effect progressively become the first-selection of energy field.In the economic policy of carrying out at present, one of energy supply system that new-energy automobile adopts is exactly lithium ionic cell module, and the development of lithium ion battery more and more highlights in the importance of energy field.
Lithium titanate is as a kind of lithium ion battery negative material, be compared to traditional graphite-like carbon negative pole, there is lot of advantages: cycle performance is excellent, graphite negative electrodes cycle-index is at about 300-2000 time, and the cycle life of lithium titanate anode is more than 20,000 times, this is mainly because unit cell dimension before and after lithium titanate charging is almost unchanged, is a kind of zero strain material; Can fill soon, lithium titanate belongs to spinel structure, has the lithium ion passage of three, and lithium ion diffusion velocity is fast, between 10-8～10-9cm2/s, than high 1～2 order of magnitude of graphite; High safety, the embedding lithium current potential of lithium titanate is in 1.55V left and right, and far above Li dendrite deposition potential, without analysing lithium risk, lithium titanate is as a kind of transition metal oxide simultaneously, and its thermal stability is far above graphite negative electrodes.Therefore because lithium titanate has advantages of numerously, become the focus in current Study on Li-ion batteries using.
In lithium titanate application process, people generally find, lithium titanate battery exists serious flatulence problem under hot environment, and this has greatly restricted large-scale promotion and the application of lithium titanate.In order to address this problem, conventionally adopt the methods such as material is coated, electrolyte prescription improvement, process optimization, but these measures are still difficult to thoroughly solve flatulence problem.
The patent of invention that for example application number is 201210120193.5 discloses a kind of quadrate lithium battery, a kind of quadrate lithium battery, comprise that two ends have uncovered tubular shell and are located at both positive and negative polarity pole piece, barrier film and the electrolyte in housing, pole piece is provided with lug, described lug is connected with an electrode deriving structure, the open-mouth of tubular shell is provided with for sealing this uncovered cover plate, has the through hole passing for power pole deriving structure on cover plate, and is on the cover board provided with liquid injection hole; Electrode deriving structure comprises a cylindrical electrode column, the inner of this electrode column has for increasing the connecting portion with the connection area of lug, and this electrode column, passes cover plate, one end be arranged with locking nut, at effect bottom electrode post and the cover plate of this locking nut, be connected; In housing, be also provided with for to the passive strutting piece of this electrode column; Connecting portion is bar shaped and arrange vertical with electrode column, and lug is laterally connected with this bar shaped connecting portion, and strutting piece is between connecting portion and cover plate, and a side of strutting piece is resisted against on this connecting portion, and its opposite side is against on the cover board.
The flatulence problem of lithium titanate has limited the application in flexible-packed battery, but flexible-packed battery has advantages such as fail safe is good, cell shapes can design arbitrarily as required, also becomes the trend of lithium ion battery development.In flexible-packed battery, once battery flatulence occurs space between both positive and negative polarity pole piece, battery deforms, and internal resistance increases, interface variation; The a large amount of electrolyte of flatulence consumption simultaneously, causes ion channel blocking, battery capacity, and cycle performances etc. sharply worsen.
Therefore for the flatulence problem of flexible package lithium titanate battery, be necessary very much to look for another way, adopt brand-new method to go to overcome this difficult problem.
Utility model content
The problem that the utility model brings because of flatulence in order to solve existing lithium titanate battery, and a kind of cylindrical flexible package lithium titanate battery is provided, solved the problem of existing flexible package lithium titanate battery flatulence; Can supplement electrolyte, and then can eliminate the insufficient electrolyte causing because of flatulence, the problems such as ion channel blocking, fundamentally eliminate the negative effect of flatulence simultaneously.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A cylindrical flexible package lithium titanate battery, is characterized in that, comprises the cylindrical roll core being wound into together with barrier film by positive and negative plate, and cylindrical roll core is encapsulated in plastic-aluminum packaging film; In described plastic-aluminum packaging film, be also provided with the liquid storage cylinder for pressure release and liquid storage, between described liquid storage cylinder and cylindrical roll core, be provided with encapsulated layer.
Further, described plastic-aluminum packaging film is provided with for the inside and outside upper closedtop position of isolating lithium battery, lower closedtop position and envelope position, left side; The package strength of described encapsulated layer is less than the package strength of closedtop position, lower closedtop position and envelope position, left side.
Further, described positive plate is connected with anode ear, and negative plate is connected with negative electrode lug, and anode ear and negative electrode lug lay respectively at the two ends up and down of cylindrical roll core.
Further, in described liquid storage cylinder, there is the electrolyte identical with cylindrical roll core.
Compared with prior art, the utlity model has following beneficial effect:
Cylindrical flexible package lithium titanate battery of the present utility model, comprises the cylindrical roll core being wound into together with barrier film by positive and negative plate, and cylindrical roll core is encapsulated in plastic-aluminum packaging film; In plastic-aluminum packaging film, be also provided with the liquid storage cylinder for pressure release and liquid storage, between liquid storage cylinder and cylindrical roll core, be provided with encapsulated layer.When battery flatulence, gas is overflowed between pole piece, and volume core itself can not be out of shape.And existing square volume core is when battery flatulence, rolls up core meeting gross distortion and cause interface variation.By cylindrical roll core, first can overcome the volume core distortion that brings because of flatulence and the problem of interface variation.
After lithium battery flatulence acquires a certain degree, the encapsulated layer between cylindrical roll core and liquid storage cylinder breaks, and completes pressure release and the fluid infusion work of lithium battery.Through testing surface, after lithium battery flatulence, there is the problems such as internal resistance increase, battery capacity fast-descending, ion channel blocking in insufficient electrolyte, lithium battery.When lithium battery is carried out after pressure release and fluid infusion, these problems can both be resolved, thereby have fundamentally eliminated the negative effect that lithium battery flatulence is brought.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is an embodiment of the present utility model and the comparative example battery cyclic curve that 3C discharges and recharges under 60 degree.
Mark in figure: 1, anode ear, 2, upper closedtop position, 3, encapsulated layer, 4, lower closedtop position, 5, negative electrode lug, 6, envelope position, left side, 7, cylindrical roll core, 8, liquid storage cylinder.
Embodiment
Below in conjunction with embodiment, the utility model will be further described, and described embodiment is only the utility model part embodiment, is not whole embodiment.Embodiment based in the utility model, those of ordinary skill in the art, not making other embodiment used that obtain under creative work prerequisite, belongs to protection range of the present utility model.
Cylindrical flexible package lithium titanate battery of the present utility model, comprise the cylindrical roll core being wound into by positive and negative plate together with barrier film, positive plate is connected with anode ear, negative plate is connected with negative electrode lug, as the mode of a kind of selection of the present utility model, positive and negative lug lays respectively at the two ends up and down of cylindrical roll core; Cylindrical roll core is encapsulated in plastic-aluminum packaging film; In plastic-aluminum packaging film, be also provided with the liquid storage cylinder for pressure release and liquid storage, between liquid storage cylinder and cylindrical roll core, be provided with encapsulated layer.In liquid storage cylinder, also liquid storing bag can be set, liquid storing bag is fixedly encapsulated in plastic-aluminum packaging film, and the local package strength that liquid storing bag contacts with cylindrical roll core will be lower than the package strength of other positions of lithium battery.The injection process of liquid storage cylinder electrolyte inside (secondary fluid injection) changes into after bleeding and carries out at battery; After secondary fluid injection completes, then liquid storing bag is encapsulated.Liquid storage cylinder liquid forms by plastic-aluminum packaging film with for isolating the encapsulated layer of liquid storage cylinder and cylindrical roll core.
The process detail of not mentioning in lithium battery manufacturing process of the present utility model, consistent with the technique of conventional lithium titanate flexible packing lithium ion battery, those skilled in the art can understand and understand, and does not repeat them here.
Further, plastic-aluminum packaging film is provided with for the inside and outside upper closedtop position of isolating lithium battery, lower closedtop position and envelope position, left side; Wherein upper and lower closedtop position is suitable with anode ear and negative electrode lug respectively; The package strength of encapsulated layer is less than the package strength of closedtop position, lower closedtop position and envelope position, left side.
Further, in liquid storage cylinder, there is the electrolyte identical with cylindrical roll core.
As a kind of selection mode of the present utility model, battery cathode active substance is the lithium titanate of lithium titanate or modification; Positive and negative lug is aluminum design.
Embodiment mono-
In conjunction with Fig. 2, the volume core model of the present embodiment is 32650, and design capacity is 3Ah; As a comparison case, the flexible-packed battery of design, model is 5591118, design capacity is 3Ah.Except battery structure difference, other comprise pole piece formula, electrolyte design, and processing technologys etc. are all identical with embodiment of the present utility model.The Capacitance reserve rate curve that the curve that is positioned at top in Fig. 2 is the present embodiment, the Capacitance reserve rate curve that the curve of below is comparative example.From Fig. 2 liquid, can find out that through testing surface, after lithium battery flatulence, lithium battery exists the problems such as internal resistance increase, battery capacity fast-descending, ion channel blocking.When lithium battery is carried out after pressure release and fluid infusion, these problems can both be resolved, thereby have fundamentally eliminated the negative effect that lithium battery flatulence is brought.
Claims (4)
1. a cylindrical flexible package lithium titanate battery, is characterized in that, comprises the cylindrical roll core (7) being wound into together with barrier film by positive and negative plate, and cylindrical roll core (7) is encapsulated in plastic-aluminum packaging film; In described plastic-aluminum packaging film, be also provided with the liquid storage cylinder (8) for pressure release and liquid storage, between described liquid storage cylinder (8) and cylindrical roll core (7), be provided with encapsulated layer (3).
2. cylindrical flexible package lithium titanate battery according to claim 1, is characterized in that, described plastic-aluminum packaging film is provided with for the inside and outside upper closedtop position (2) of isolating lithium battery, lower closedtop position (4) and envelope position, left side (6); The package strength of described encapsulated layer (3) is less than the package strength of closedtop position (2), lower closedtop position (4) and envelope position, left side (6).
3. cylindrical flexible package lithium titanate battery according to claim 1 and 2, it is characterized in that, described positive plate is connected with anode ear (1), and negative plate is connected with negative electrode lug (5), and anode ear (1) and negative electrode lug (5) lay respectively at the two ends up and down of cylindrical roll core (7).
4. cylindrical flexible package lithium titanate battery according to claim 3, has the electrolyte identical with cylindrical roll core (7) in described liquid storage cylinder (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420133134.6U CN203895566U (en) | 2014-03-24 | 2014-03-24 | Cylindrical flexibly-packaged lithium titanate battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420133134.6U CN203895566U (en) | 2014-03-24 | 2014-03-24 | Cylindrical flexibly-packaged lithium titanate battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203895566U true CN203895566U (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420133134.6U Expired - Fee Related CN203895566U (en) | 2014-03-24 | 2014-03-24 | Cylindrical flexibly-packaged lithium titanate battery |
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| Country | Link |
|---|---|
| CN (1) | CN203895566U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840217A (en) * | 2014-03-24 | 2014-06-04 | 四川剑兴锂电池有限公司 | Cylindrical flexible package lithium titanate battery |
| CN106067535A (en) * | 2016-08-11 | 2016-11-02 | 宁德时代新能源科技股份有限公司 | Battery with a battery cell |
| CN106159190A (en) * | 2016-08-11 | 2016-11-23 | 宁德时代新能源科技股份有限公司 | Battery with a battery cell |
-
2014
- 2014-03-24 CN CN201420133134.6U patent/CN203895566U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840217A (en) * | 2014-03-24 | 2014-06-04 | 四川剑兴锂电池有限公司 | Cylindrical flexible package lithium titanate battery |
| CN103840217B (en) * | 2014-03-24 | 2016-08-31 | 四川剑兴锂电池有限公司 | A kind of cylindrical flexible package lithium titanate battery |
| CN106067535A (en) * | 2016-08-11 | 2016-11-02 | 宁德时代新能源科技股份有限公司 | Battery with a battery cell |
| CN106159190A (en) * | 2016-08-11 | 2016-11-23 | 宁德时代新能源科技股份有限公司 | Battery with a battery cell |
| CN106067535B (en) * | 2016-08-11 | 2018-09-18 | 宁德时代新能源科技股份有限公司 | Battery with a battery cell |
| CN106159190B (en) * | 2016-08-11 | 2018-10-30 | 宁德时代新能源科技股份有限公司 | Battery with a battery cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 |