CN102738502B - Short test lithium ion battery and preparation method thereof in forcing - Google Patents
Short test lithium ion battery and preparation method thereof in forcing Download PDFInfo
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- CN102738502B CN102738502B CN201110095601.1A CN201110095601A CN102738502B CN 102738502 B CN102738502 B CN 102738502B CN 201110095601 A CN201110095601 A CN 201110095601A CN 102738502 B CN102738502 B CN 102738502B
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- China
- Prior art keywords
- lithium ion
- positive pole
- core
- film
- ion battery
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Links
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 100
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 230000004888 barrier function Effects 0.000 claims abstract description 16
- 238000012856 packing Methods 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims abstract description 14
- 239000004411 aluminium Substances 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000003475 lamination Methods 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 239000004677 Nylon Substances 0.000 claims description 8
- 239000005030 aluminium foil Substances 0.000 claims description 8
- 229920001778 nylon Polymers 0.000 claims description 8
- 239000002390 adhesive tape Substances 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 6
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910012851 LiCoO 2 Inorganic materials 0.000 claims description 3
- 229910010707 LiFePO 4 Inorganic materials 0.000 claims description 3
- 229910015645 LiMn Inorganic materials 0.000 claims description 3
- 229910013290 LiNiO 2 Inorganic materials 0.000 claims description 3
- 229910006025 NiCoMn Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910021385 hard carbon Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 abstract description 8
- 238000009489 vacuum treatment Methods 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 2
- 238000011076 safety test Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Short test lithium ion battery in a kind of pressure, comprises core of lithium ion cell, short circuit metallic part, positive pole ear, negative lug and packs film.The barrier film that core of lithium ion cell comprises positive pole, negative pole and is interval between positive pole and negative pole, core of lithium ion cell eliminates external packing and is full of electricity.Short circuit metallic part is involved in lithium ion battery in-core.Positive pole ear, negative lug to be welded on core of lithium ion cell and to be connected with positive pole and negative electricity respectively.Pack film core of lithium ion cell is sealed and vacuumizes, make short circuit metallic part pack marking film being formed evagination.In above-mentioned pressure, short test lithium ion battery adopts and packs film and achieve and pack, and ensure that electrolyte is not revealed, after vacuum treatment simultaneously, short circuit metallic part packing, film is formed the marking of evagination, and its location comparison placed is obvious.The present invention also provides a kind of preparation method forcing interior short test lithium ion battery.
Description
[technical field]
The present invention relates to a kind of lithium ion battery and preparation method thereof, particularly relate to short test lithium ion battery and preparation method thereof in a kind of pressure.
[background technology]
Lithium ion battery more and more obtains the attention of industry in recent years as the new force of battery industry.No matter be at common compact communication apparatus as mobile phone, be still used in mobile device as on digital product, or be used in as on electric tool, pure battery car on power-equipment, the usage space of lithium ion battery is increasing, is also more and more liked by consumer.
Along with the birth of lithium ion battery, safety problem always worry by people.Make enterprise and research institution as battery, set up strict safety test means and test stone seems very important and necessary.Japan is in the research of lithium ion battery, and lead over the world, it is in cell safety detection means and standard, establishes a kind of method of test battery safety---force internal short-circuit method.But for the lithium ion battery of the method for this safety test after being involved in short circuit metallic part, its position is difficult to seek to be seen, the leakage and the electrolyte of lithium ion battery easily volatilizees.
[summary of the invention]
In view of above-mentioned condition, be necessary to provide a kind of short circuit metallic part position observability good and short test lithium ion battery in the pressure of the not volatile leakage of electrolyte.
Short test lithium ion battery in a kind of pressure, comprising:
Core of lithium ion cell, the barrier film comprising positive pole, negative pole and be interval between described positive pole and described negative pole, described core of lithium ion cell eliminates external packing and is full of electricity;
Short circuit metallic part, is involved in described lithium ion battery in-core;
Positive pole ear, to be welded on described core of lithium ion cell and to be electrically connected with described positive pole;
Negative lug, to be welded on described core of lithium ion cell and to be connected with described negative electricity; And
Pack film, described core of lithium ion cell is sealed and vacuumizes, make described short circuit metallic part pack described marking film being formed evagination, pack outside film described in described positive pole ear and negative lug part expose to.
In above-mentioned pressure, short test lithium ion battery adopts and packs film and achieve and pack, ensure that electrolyte is not revealed, after vacuum treatment simultaneously, short circuit metallic part packing, film is formed the marking of evagination, its location comparison placed is obvious, ensure that when doing interior short test, its position easily can be sought, controlled.
Further, described positive pole ear and negative lug include bonding jumper and are located at the adhesive tape that the acrylic resin on described bonding jumper makes
Further, the material of the bonding jumper of described positive pole ear is aluminium, and the material of the bonding jumper of described negative lug is the one in nickel and copper.
Further, described short circuit metallic part is L-type nickel wire.
Further, packing film described in is aluminum-plastic composite membrane.
Further, the material of described positive pole is selected from LiCoO
2, LiNiO
2, Li (NiCoMn) O
2, LiMn
2o
4and LiFePO
4in at least one.
Further, the material of described negative pole is selected from graphite, hard carbon and Li
4ti
5o
12in at least one.
Meanwhile, be necessary to provide short circuit metallic part position observability good and the preparation method of short test lithium ion battery in the pressure of the not volatile leakage of electrolyte.
Force a preparation method for interior short test lithium ion battery, comprise the steps:
There is provided a kind of core of lithium ion cell, the barrier film that described core of lithium ion cell comprises positive pole, negative pole and is interval between described positive pole and described negative pole, and described core of lithium ion cell eliminates external packing and is full of electricity;
Short circuit metallic part is involved in described lithium ion battery in-core;
Positive pole ear and negative lug are welded on described core of lithium ion cell, described positive pole ear is electrically connected with described positive pole, and described negative lug is connected with described negative electricity; And
Employing packs film and is sealed by described core of lithium ion cell and carry out vacuumizing process, packs outside film described in described positive pole ear and negative lug part expose to.
Further, described positive pole ear and negative lug adopt the method for ultrasonic bonding to be welded on described core of lithium ion cell.
Further, described aluminum-plastic composite membrane comprises aluminium lamination and is located at resin bed and the nylon layer of described aluminium lamination both sides.
In above-mentioned pressure, the preparation method of short test lithium ion battery adopts and packs film and achieve and pack, ensure that electrolyte is not revealed, after vacuum treatment simultaneously, short circuit metallic part packing, film is formed the marking of evagination, its location comparison placed is obvious, ensure that when doing interior short test, its position easily can be sought, controlled.
[accompanying drawing explanation]
Fig. 1 be enforcement one pressure in the structural representation of short test lithium ion battery;
Fig. 2 is the stereogram of the core of lithium ion cell of short test lithium ion battery in forcing shown in Fig. 1;
Fig. 3 is the stereogram of the short circuit metallic part of short test lithium ion battery in forcing shown in Fig. 1;
Fig. 4 is the stereogram of the positive pole ear of short test lithium ion battery in forcing shown in Fig. 1;
Fig. 5 is the structural representation packing film of short test lithium ion battery in forcing shown in Fig. 1;
View when Fig. 6 is the sealing of short test lithium ion battery in forcing shown in Fig. 1;
Fig. 7 be embodiment two pressure in the structural representation of short test lithium ion battery;
Fig. 8 be embodiment one pressure in the flow chart of preparation method of short test lithium ion battery.
[embodiment]
Main accompanying drawings the specific embodiment of the present invention below.
Refer to Fig. 1 and Fig. 2, in the pressure of the present embodiment one, short test lithium ion battery 100 comprises core of lithium ion cell 110, short circuit metallic part 120, positive pole ear 130, negative lug 140 and packs film 150.
Core of lithium ion cell 110 is square lithium ion battery core, which removes external packing and is full of electricity.Core of lithium ion cell 110 comprises barrier film 112, positive pole 114, negative pole (not shown) and aluminium foil 116.Barrier film 112 is interval between positive pole 114 and negative pole, to prevent core of lithium ion cell 110 short circuit.Positive pole adopts electric conducting material be coated on aluminium foil 116 and formed.Negative pole employing electric conducting material is coated on barrier film 112 formation.The material of positive pole 114 is selected from LiCoO
2, LiNiO
2, Li (NiCoMn) O
2, LiMn
2o
4and LiFePO
4in at least one.The material of negative pole is selected from graphite, hard carbon and Li
4ti
5o
12in at least one.
Refer to Fig. 3, short circuit metallic part 120 is involved in core of lithium ion cell 110.Specifically in the present embodiment, short circuit metallic part 120 is involved between the positive pole 114 of core of lithium ion cell 110 and barrier film 112.When adopting short test lithium ion battery 100 in above-mentioned pressure to do the test of pressure internal short-circuit, one pressure is applied to short circuit metallic part 120, short circuit metallic part 120 is made to wear out barrier film 112, cause core of lithium ion cell 110 internal short-circuit, whether can explode or burn when detecting short test lithium ion battery 100 short circuit in forcing, thus learn in pressure, whether short test lithium ion battery 100 meets international standard.Short circuit metallic part 120 can be any conducting metal part, and in the present embodiment, short circuit metallic part 120 is L-type nickel wire.
Refer to Fig. 4, positive pole ear 130 to be welded on core of lithium ion cell 110 and to be electrically connected with positive pole 114.Negative lug 140 to be welded on core of lithium ion cell 110 and to be connected with negative electricity.Specifically in the present embodiment, positive pole ear 130 and negative lug 140 adopt the method for ultrasonic bonding to be welded on core of lithium ion cell 110.Positive pole ear 130 comprises bonding jumper 132 and is located at the adhesive tape 134 on bonding jumper 132.Adhesive tape 134 is made up of acrylic resin.In the present embodiment, the structure of negative lug 140 is identical with the structure of positive pole ear 130; Adhesive tape is fixed on bonding jumper by the method for pressing.The thickness of bonding jumper can be 0.05 ~ 0.4mm, is preferably 0.1mm.Bonding jumper 132 material of positive pole ear 130 is aluminium.The material of the bonding jumper of negative lug 140 is the one in nickel and copper.
Refer to Fig. 5 and Fig. 6, pack film 150 and core of lithium ion cell 110 is sealed and vacuumizes, make short circuit metallic part 120 pack marking film 150 being formed evagination.Positive pole ear 130 and negative lug 140 part expose to and pack outside film 150.Pack film 150 for aluminum-plastic composite membrane, plastic film etc.In the present embodiment, film 150 is packed for aluminum-plastic composite membrane.Pack film 150 and comprise nylon layer 152, aluminium lamination 154 and resin bed 156.Nylon layer 152 and resin bed 156 are located at the both sides of aluminium lamination 154 respectively.Resin bed 156 can be acrylic resin or chlorinated polypropylene layer.Resin bed 156 is for sweat soldering.Aluminium lamination 154 plays moisture and oxygen obstruction effect.Nylon layer 152 Environmental Roles.The thickness packing film 150 can be 0.08 ~ 0.18mm, is preferably 0.11mm.
In above-mentioned pressure, short test lithium ion battery 100 adopts and packs film 150 and achieve and pack, ensure that electrolyte is not revealed, after vacuum treatment simultaneously, short circuit metallic part 120 packing, film 150 is formed the marking of evagination, its location comparison placed is obvious, ensure that when doing interior short test, its position easily can be sought, controlled.
Refer to Fig. 7, in the pressure of the present embodiment two, short test lithium ion battery 200 and short test lithium ion battery 100 basic simlarity in pressure, comprise core of lithium ion cell 210 and short circuit metallic part 220; Core of lithium ion cell 210 comprises barrier film 212, positive pole 214 and negative pole 218.Difference is: core of lithium ion cell 210 is cylindrical lithium ion battery core, and also comprises aluminium foil 216; Barrier film 212 has two-layer, and short circuit metallic part 220 is involved between aluminium foil 216 and barrier film 212.
Refer to Fig. 8, in the pressure of the present embodiment, the preparation method of short test lithium ion battery, comprises the steps S301 ~ S304.
Refer to Fig. 2, step S301: provide a kind of lithium ion battery 110, core of lithium ion cell 110 comprises positive pole 114, negative pole and is interval in the barrier film 112 between positive pole 114 and negative pole, and core of lithium ion cell 110 eliminates external packing and is full of electricity.
Step 302: short circuit metallic part 120 is involved in core of lithium ion cell 110.
Refer to Fig. 6, step S303: be welded on core of lithium ion cell 110 by positive pole ear 130 and negative lug 140, positive pole ear 130 is electrically connected with positive pole 114, and negative lug 140 is connected with negative electricity.Specifically in the present embodiment, positive pole ear 130 and negative lug 140 adopt the method for ultrasonic bonding to be welded on core of lithium ion cell 110.
See also Fig. 5, step S304: adopt and pack, core of lithium ion cell 110 to seal and to carry out vacuumizing process by 150, and positive pole ear 130 and negative lug 140 part expose to and pack outside film 150.Pack resin bed 156 and nylon layer 152 that film 150 comprises aluminium lamination 154 and is located at aluminium lamination 154 both sides respectively.
In above-mentioned pressure, the preparation method of short test lithium ion battery adopts and packs film 150 and achieve and pack, ensure that electrolyte is not revealed, after vacuum treatment simultaneously, short circuit metallic part 120 packing, film 150 is formed the marking of evagination, its location comparison placed is obvious, ensure that when doing interior short test, its position easily can be sought, controlled.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (7)
1. a short test lithium ion battery in forcing, is characterized in that, comprising:
Core of lithium ion cell, the barrier film comprising aluminium foil, positive pole, negative pole and be interval between described positive pole and described negative pole, described positive pole adopts electric conducting material be coated on described aluminium foil and formed, described negative pole adopts electric conducting material be coated on described barrier film and formed, and described core of lithium ion cell eliminates external packing and is full of electricity;
Short circuit metallic part, is involved in described lithium ion battery in-core;
Positive pole ear, to be welded on described core of lithium ion cell and to be electrically connected with described positive pole;
Negative lug, to be welded on described core of lithium ion cell and to be connected with described negative electricity; And
Pack film, described core of lithium ion cell is sealed and vacuumizes, make described short circuit metallic part pack described marking film being formed evagination, pack outside film described in described positive pole ear and negative lug part expose to;
Pack film and comprise nylon layer, aluminium lamination and resin bed, described nylon layer and described resin bed are located at the both sides of described aluminium lamination respectively;
Described positive pole ear and described negative lug all adopt the method for ultrasonic bonding to be welded on described core of lithium ion cell, and include bonding jumper and be located at the adhesive tape on described bonding jumper.
2. as claimed in claim 1 force in short test lithium ion battery, it is characterized in that, described positive pole ear and negative lug include bonding jumper and are located at the adhesive tape that the acrylic resin on described bonding jumper makes.
3. as claimed in claim 2 force in short test lithium ion battery, it is characterized in that, the material of the bonding jumper of described positive pole ear is aluminium, and the material of the bonding jumper of described negative lug is the one in nickel and copper.
4. short test lithium ion battery in pressure as claimed in claim 1, it is characterized in that, described short circuit metallic part is L-type nickel wire.
5. short test lithium ion battery in pressure as claimed in claim 1, it is characterized in that, the material of described positive pole is selected from LiCoO
2, LiNiO
2, Li (NiCoMn) O
2, LiMn
2o
4and LiFePO
4in at least one.
6. short test lithium ion battery in pressure as claimed in claim 1, it is characterized in that, the material of described negative pole is selected from graphite, hard carbon and Li
4ti
5o
12in at least one.
7. in forcing, a preparation method for short test lithium ion battery, is characterized in that, comprise the steps:
A kind of core of lithium ion cell is provided, the barrier film that described core of lithium ion cell comprises aluminium foil, positive pole, negative pole and is interval between described positive pole and described negative pole, described positive pole adopts electric conducting material be coated on described aluminium foil and formed, described negative pole adopts electric conducting material be coated on described barrier film and formed, and described core of lithium ion cell eliminates external packing and is full of electricity;
Short circuit metallic part is involved in described lithium ion battery in-core;
Positive pole ear and negative lug are welded on described core of lithium ion cell, described positive pole ear is electrically connected with described positive pole, and described negative lug is connected with described negative electricity; And
Employing packs film and is sealed by described core of lithium ion cell and carry out vacuumizing process, makes described short circuit metallic part pack described marking film being formed evagination, packs outside film described in described positive pole ear and negative lug part expose to;
Described resin bed and the nylon layer packing film and comprise aluminium lamination and be located at described aluminium lamination both sides respectively;
Described positive pole ear and negative lug adopt the method for ultrasonic bonding to be welded on described core of lithium ion cell, and include bonding jumper and be located at the adhesive tape on described bonding jumper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110095601.1A CN102738502B (en) | 2011-04-15 | 2011-04-15 | Short test lithium ion battery and preparation method thereof in forcing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110095601.1A CN102738502B (en) | 2011-04-15 | 2011-04-15 | Short test lithium ion battery and preparation method thereof in forcing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102738502A CN102738502A (en) | 2012-10-17 |
| CN102738502B true CN102738502B (en) | 2016-03-23 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110095601.1A Active CN102738502B (en) | 2011-04-15 | 2011-04-15 | Short test lithium ion battery and preparation method thereof in forcing |
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| CN (1) | CN102738502B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890588A (en) * | 2019-11-20 | 2020-03-17 | 芜湖天弋能源科技有限公司 | Lithium ion battery comprising internal short circuit device, manufacturing method and triggering method |
| CN112366358A (en) * | 2020-08-28 | 2021-02-12 | 南京瑞贻电子科技有限公司 | Preparation method of lithium electronic battery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533927A (en) * | 2009-03-17 | 2009-09-16 | 林道勇 | Method for manufacturing lithium ion battery |
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|---|---|---|---|---|
| JP5503183B2 (en) * | 2009-04-10 | 2014-05-28 | 株式会社Ｋｒｉ | Safety evaluation method for power storage devices |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533927A (en) * | 2009-03-17 | 2009-09-16 | 林道勇 | Method for manufacturing lithium ion battery |
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| CN102738502A (en) | 2012-10-17 |
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