CN101394006A - Valve-free fully sealed lithium ionic cell - Google Patents
Valve-free fully sealed lithium ionic cell Download PDFInfo
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- CN101394006A CN101394006A CNA200810046498XA CN200810046498A CN101394006A CN 101394006 A CN101394006 A CN 101394006A CN A200810046498X A CNA200810046498X A CN A200810046498XA CN 200810046498 A CN200810046498 A CN 200810046498A CN 101394006 A CN101394006 A CN 101394006A
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- Prior art keywords
- valve
- ionic cell
- lithium ionic
- fully sealed
- sealed lithium
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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
Abstract
A valveless fully-sealed lithium ion battery relates to a lithium ion battery and is composed of a plastic shell, a negative pole, a cover plate, a positive pole, pole pieces and electric liquid positioned in the plastic shell. The positive pole is composed of materials in the following mass percentages: LiMn2O4 (62-72), LiFePO4 (18-28), water gel (2-3), conductive graphite (3-5) and conductive carbon black (0.5-1.5); the negative pole is composed of materials in the following mass percentages: artificial graphite C (94-97), water gel (2-6) and conductive graphite (0.3-0.7); and the electric liquid is composed of raw materials in the following molar ratio: LiPF6 (0.5-1.5), EC (0.5-1.5), DMC (0.5-1), EMC (0.5-1.5), and DEC (0.5-1.5). The lithium ion battery solves the problems of the prior lithium ion battery that the stability is poor, and local high temperature and a large amount of excess gas are generated, and a housing is easy to absorb moisture, and the like.
Description
Technical field
The present invention relates to a kind of battery, particularly a kind of lithium ion battery.
Background technology
As everyone knows, energy demand is increased sharply day by day.Particularly China has leapt to the oil consumption big country that is only second to the U.S., and is very urgent to the green novel energy source requirement, from current Beijing 2008 Olympic Games green traffic car, to new forms of energy development prospect first meeting clue.Volkswagen has proposed low emission clean diesel technology automobile according to it self superb engine technology; The leading cost height of General Corporation, technical sophistication fuel cell car, Toyota Company supports the big hybrid vehicle of initial investment; Be with Chinese characteristics is to be the low price in base, the pure battery power automobile of technology reality with Beijing.China's power-type lithium ion battery production technology is not second to Japan and The world other various countries, if existing lithium ion battery production technology is done a reasonable integration and improvement, by government or large enterprise's financial support, lithium-ion-power cell prime investment phase and campaign have been arrived at present again.
Current driving force type lithium ion battery is divided into two kinds of Soft Roll and Hard Rolls (moulding shell and metal-back).Mould shell and metal-back at present traditional battery structure and production technology, problem the more, greatest problem is to be easy to generate inflatable, internal short-circuit, even explosion phenomenon in long-term the use.Producing this phenomenon main cause is, electric in-core CURRENT DISTRIBUTION inequality causes local overheating, and then form the local district of doing, and do the district in case form, just illustrate that electric liquid gasifies, cause to press in the inside battery and increase, the safety valve action, battery exhaust is outward also carried electric liquid ejection secretly.Contaminated environment not only, battery has been in utmost point labile state, because in case arrange institute, makes again and does the district and enlarge, and local overheating is aggravated very fast inefficacy of battery or explosion again.
The patent of relevant lithium ion battery is a lot, has announced a kind of novel rectangular lithium ion battery as Chinese patent ZL200720099429.6.But there is poor stability in this lithium ion battery, produces localized hyperthermia, produces a large amount of unnecessary gases, problems such as the easy moisture absorption of housing.
Summary of the invention
The purpose of this invention is to provide a kind of valve-free fully sealed lithium ionic cell.The invention solves the poor stability that existing lithium battery exists, produce localized hyperthermia, produce problems such as a large amount of unnecessary gases, the easy moisture absorption of housing.
Valve-free fully sealed lithium ionic cell of the present invention is formed by moulding shell, negative terminal, cover plate, positive terminal, pole piece and being positioned at the electric liquid of moulding shell; Positive terminal is made up of the material of following mass percent: LiMn
2O
4(62-72), LiFePO
4(18-28), glue (2-3), electrically conductive graphite (3-5), conductive carbon black (0.5-1.5); Negative material is made up of the material of following mass percent: Delanium C (94-97), glue (2-6), electrically conductive graphite (0.3-0.7); Electricity liquid is made up of the raw material of following mol ratio: LiPF
6(0.8-1.5), EC (0.5-1.5), DMC (0.5-1), EMC (0.5-1.5), DEC (0.5-1.5).
Valve-free fully sealed lithium ionic cell of the present invention can also have following characteristics, and negative material adopts large granular spherical Delanium material, and the diameter of Delanium is: 20 microns-40 microns.
Valve-free fully sealed lithium ionic cell of the present invention, can also have following characteristics, mould the hexahedron structure of shell for no reinforcement, mould and be stamped cover plate above the shell, mould between shell and the cover plate hot plate welding is arranged, negative terminal and positive terminal are installed on the cover plate, the pole piece that is connected with positive terminal with negative terminal is arranged in moulding shell respectively.
Valve-free fully sealed lithium ionic cell of the present invention can also have following characteristics, tightens the electric core of pole piece with unidimensional lamination, and the assembling ratio of electric core is controlled between (88-92) %.
Valve-free fully sealed lithium ionic cell of the present invention can also have following characteristics, before battery is made, carries out vacuumizing at least four times.
Valve-free fully sealed lithium ionic cell of the present invention can also have following characteristics, and battery adopts little opening, and little electric current forming technology fully activates battery, fully exhaust, and opening size is less than Φ 3mm, and forming current is less than 0.2C.
Valve-free fully sealed lithium ionic cell of the present invention can also have following characteristics, and negative terminal and positive terminal are installed in by a nut respectively and mould on the shell.
Valve-free fully sealed lithium ionic cell of the present invention can also have following characteristics, and pole piece is fixed on negative terminal and the positive terminal by rivet.
Valve-free fully sealed lithium ionic cell of the present invention has good stability, and can not produce localized hyperthermia during work and a large amount of unnecessary gas, housing are not easy the moisture absorption etc.Inside battery of the present invention only changes and expands because of pole piece when charging, and interior pressure changes slightly, but gets back to original state during discharge again, do not have gas and produce, guarantee that battery is in a safe condition all the time, can exhaust, do not pollute the environment, guaranteed the long-life of battery.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and with illustrated embodiments the present invention is done detailed explanation
Embodiment one
Valve-free fully sealed lithium ionic cell is formed by moulding shell 1, negative terminal 3, cover plate 4, positive terminal 5, pole piece 7 and being positioned at the electric liquid of moulding shell; Positive terminal is made up of the material of following mass percent: LiMn
2O
464.4, LiFePO
427.6, glue 3, electrically conductive graphite 4, conductive carbon black 1.Also used the oxalic acid of above-mentioned raw materials gross mass 1% in addition, oxalic acid is because can vapor away in filming, so accounting example not.
Negative material is made up of the material of following mass percent: Delanium C 96, glue 3.5, electrically conductive graphite 0.5.
Electricity liquid is made up of the raw material of following mol ratio: 1MLLiPF6/EC1:DMC0.8:EMC1:DEC1
Embodiment two
Valve-free fully sealed lithium ionic cell, negative material adopt large granular spherical Delanium material, and the diameter of Delanium is: 30 microns.
Embodiment three
The structure of valve-free fully sealed lithium ionic cell is, moulds shell 1 and is the hexahedron structure of no reinforcement, moulds and is stamped cover plate 4 above the shell 1, and moulding between shell 1 and the cover plate 4 has hot plate welding 2; Negative terminal 3 and positive terminal 5 are installed on the cover plate 4; The pole piece 7 that is connected with positive terminal 5 with negative terminal 3 is arranged in moulding shell 1 respectively.
Negative terminal (3) and positive terminal 5 are installed in by a nut 8 respectively and mould on the shell 1.
Pole piece 7 is fixed on negative terminal 3 and the positive terminal 5 by rivet 6.
Embodiment four
Valve-free fully sealed lithium ionic cell is tightened the electric core of pole piece 7 with unidimensional lamination, and makes the assembling ratio of electric core be controlled at 90%.
Embodiment five
Valve-free fully sealed lithium ionic cell before battery is made, carries out vacuumizing at least four times.
Embodiment six
Valve-free fully sealed lithium ionic cell, battery adopt little opening, and little electric current forming technology fully activates battery, fully exhaust, and opening size is less than Φ 3mm, and forming current is less than 0.2C.
Embodiment seven
Valve-free fully sealed lithium ionic cell, its manufacturing process is: both positive and negative polarity close slurry → viscosimetric → filter → film → dry → cut edge → roll extrusion → punching → lamination → survey internal resistance → riveted joint → electric core → vacuumize → go into shell → vacuumize → advance drying room → measurement internal resistance → hot plate welding capping → vacuum repeatedly fluid injection → immersion → three a little electric current of the little opening of circulation change into → advance between high temperature (+40 ℃) and store three days → envelope liquid injection port → survey open circuit voltage and internal resistance → assemble → dispatch from the factory.
Valve-free fully sealed lithium ionic cell of the present invention has following characteristics:
1, positive electrode adopts LiMn2O
4And LiFePO4Change continuously proportioning between 7:3 and 8:2, improve like this battery security, charging voltage is maintained about 4V, discharge platform is about 3.6V, because LiMn2O
4Charging is greater than 4V, and poor heat stability also takes full advantage of olivine lattice LiFePO4Stability.
2, negative material adopts through high-temperature process, and bulky grain (about 30um) ball type is artificial The graphite material. Overcome like this angle corrosion reaction of graphite point, guaranteed that battery does not have unnecessary γ-ray emission.
3, electric liquid adopts quaternary (EC+DMC+EMC+DEC) solvent, and makes low-boiling DMC consumption reduce LiPF as far as possible6Also keep general normal concentration, electric liquid measure also will be strict controlled in 5.5g/AH about.
4, mould shell design employing and do not have reinforcement, wall thickness greater than 3mmPP injection moulded shell lid, heat Plate welding lid and housing technologies, the design of superelevation battery case makes battery core top headspace be not less than shell Dark 1/5. Welding operation is convenient like this, need not scalp excess solder, is convenient to combination. Housing is difficult for Between the residual gas space of the moisture absorption and reservation abundance, but battery must stand up use.
5, need not roll up and scratch battery core, adopt and tighten battery core with the size lamination, and make assembling than control Tight assembling technology between 0.88-0.92. So both guaranteed that electric liquid fully infiltrated, reduced again The battery core internal resistance. Volume is scratched battery core and is difficult for oven dry.
6, adopt special positive/negative plate roll extrusion, punching and heat treatment technology, make the pole piece porosity The aperture is reasonable, and pole piece does not have burr, and water content greatly reduces, and gas produces in the battery thereby improved Give birth to.
7, adopt novel aqueous anodal adhesive, prevented anodal aqueous binder in the tradition Minimum gas produces.
8, adopt big Capacity design technology to make battery in changing into and using, be in all the time 0.4C Following condition of work prevents the heavy current impact battery, guarantees the long-life of battery.
9, adopting more than four times repeatedly at least, the vacuum pumping liquid injection technology is fully soaked battery Profit. Prevent from doing district and residual gas existence.
10, adopt little opening, little electric current changes into system, and battery is fully activated, fully row Gas. Opening size is less than Φ 3mm, and forming current is less than 0.2C.
11, under+40 ℃ of dry environments, after opening stored three days, open circuit voltage was normal, just seals battery with ultrasonic technology, can dispatch from the factory.
12, adopt battery of the present invention, the simple serial connection charge device of adapted, balance protection plate that need not be numerous and diverse, the use of can dispatching from the factory of combination in any battery pack.
Claims (8)
1. valve-free fully sealed lithium ionic cell is formed by moulding shell (1), negative terminal (3), cover plate (4), positive terminal (5), pole piece (7) and being positioned at the electric liquid of moulding shell; It is characterized in that positive terminal is made up of the material of following mass percent: LiMn
2O
4(62-72), LiFePO
4(18-28), glue (2-3), electrically conductive graphite (3-5), conductive carbon black (0.5-1.5); Negative material is made up of the material of following mass percent: Delanium C (94-97), glue (2-6), electrically conductive graphite (0.3-0.7); Electricity liquid is made up of the raw material of following mol ratio: LiPF
6(0.5-1.5), EC (0.5-1.5), DMC (0.5-1), EMC (0.5-1.5), DEC (0.5-1.5).
2. valve-free fully sealed lithium ionic cell according to claim 1 is characterized in that, negative material adopts large granular spherical Delanium material, and the diameter of Delanium is: 20 microns-40 microns.
3. valve-free fully sealed lithium ionic cell according to claim 1 is characterized in that, moulds shell (1) and is the hexahedron structure of no reinforcement, moulds and is stamped cover plate (4) above the shell (1), and moulding between shell (1) and the cover plate (4) has hot plate weld seam (2); Negative terminal (3) and positive terminal (5) are installed on the cover plate (4); The pole piece (7) that is connected with positive terminal (5) with negative terminal (3) is arranged in moulding shell (1) respectively.
4. as valve-free fully sealed lithium ionic cell as described in the claim 3, it is characterized in that, tighten the electric core of pole piece (7) with unidimensional lamination, and the assembling ratio of electric core is controlled between (88-92) %.
5. as valve-free fully sealed lithium ionic cell as described in the claim 3, it is characterized in that, before battery is made, carry out vacuumizing at least four times.
6. as valve-free fully sealed lithium ionic cell as described in the claim 3, it is characterized in that battery adopts little opening, little electric current forming technology fully activates battery, fully exhaust, and opening size is less than Φ 3mm, and forming current is less than 0.2 ℃.
7. valve-free fully sealed lithium ionic cell as claimed in claim 3 is characterized in that: negative terminal (3) and positive terminal (5) are installed in by a nut (8) respectively and mould on the shell (1).
8. valve-free fully sealed lithium ionic cell as claimed in claim 3 is characterized in that: pole piece (7) is fixed on negative terminal (3) and the positive terminal (5) by rivet (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810046498XA CN101394006A (en) | 2008-11-07 | 2008-11-07 | Valve-free fully sealed lithium ionic cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810046498XA CN101394006A (en) | 2008-11-07 | 2008-11-07 | Valve-free fully sealed lithium ionic cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101394006A true CN101394006A (en) | 2009-03-25 |
Family
ID=40494170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810046498XA Pending CN101394006A (en) | 2008-11-07 | 2008-11-07 | Valve-free fully sealed lithium ionic cell |
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|---|---|
| CN (1) | CN101394006A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510625B (en) * | 2009-03-26 | 2011-01-12 | 西安瑟福能源科技有限公司 | Ultra-high magnification lithium ion battery |
| CN102447132A (en) * | 2011-10-24 | 2012-05-09 | 吉林省晋吉锂电池有限公司 | Semisolid flow lithium ion battery |
| CN112335089A (en) * | 2020-03-31 | 2021-02-05 | 宁德新能源科技有限公司 | Electrochemical device and battery pack |
-
2008
- 2008-11-07 CN CNA200810046498XA patent/CN101394006A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510625B (en) * | 2009-03-26 | 2011-01-12 | 西安瑟福能源科技有限公司 | Ultra-high magnification lithium ion battery |
| CN102447132A (en) * | 2011-10-24 | 2012-05-09 | 吉林省晋吉锂电池有限公司 | Semisolid flow lithium ion battery |
| CN112335089A (en) * | 2020-03-31 | 2021-02-05 | 宁德新能源科技有限公司 | Electrochemical device and battery pack |
| WO2021195938A1 (en) * | 2020-03-31 | 2021-10-07 | 宁德新能源科技有限公司 | Electrochemical device and battery pack |
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| PB01 | Publication | ||
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Open date: 20090325 |