CN2783541Y - Anode piece for column shape lithium-iron disulphide cell - Google Patents
Anode piece for column shape lithium-iron disulphide cell Download PDFInfo
- Publication number
- CN2783541Y CN2783541Y CNU2004200724429U CN200420072442U CN2783541Y CN 2783541 Y CN2783541 Y CN 2783541Y CN U2004200724429 U CNU2004200724429 U CN U2004200724429U CN 200420072442 U CN200420072442 U CN 200420072442U CN 2783541 Y CN2783541 Y CN 2783541Y
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- battery
- lithium
- pyrite
- cell
- positive electrode
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- Y02E60/12—
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- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model provides an anode piece for column shape lithium-iron disulphide cell, which includes an anode active material iron disulfide and a metal mesh for fixing the anode active material. The anode active material is pyrite which has been treated, and the pyrite is formed into flaky shape. The metal gauze is positioned in the flaky pyrite. The anode piece is provided with low cost, simple production technology, superior electrical property and high capacity.
Description
Technical field
The utility model belongs to the battery technology field, particularly a kind of cylindrical takeup type lithium-ferrous disulfide battery anode pole piece.
Background technology
Lithium battery is that later 1950s is at first by the battery of the brand-new generation of American Studies exploitation.Japan has developed lithium carbon monofluoride battery the earliest in 1973, so far the history in year surplus in the of existing 30.The civilian lithium battery to 1975 of a Japan year input is produced in batches.And China has also just realized Li/MnO in the eighties
2The production of button cell.
Zhang Xiqing, Shen Yongpei, Shen Songjian at first mention with difference and force agent and high density polyethylene (HDPE) blend in " the poly modification of li-Mn button cell " (" battery " 1994 the 3rd phases), to improve his leak resistance of button electricity.
Zhang Mao has designed the make-up machine of positive plate clearly in " design of button type lithium-manganese battery positive plate automatic moulding machine " (the 2nd phase of " battery " nineteen ninety-five) literary composition.
Liu Ruihua, Changqing, osmanthus " button type lithium-manganese battery life-span fast detecting " (" battery " 1996 the 4th phases) according to lnt=A-1.151ni, adopt big electric current earlier, discharge with specified little current condition then, with the fast detecting battery life.
Lithium-poly-fluorocarbons battery, lithium-thionyl chloride battery, lithium sulfur dioxide cell, lithium-copper oxide cell, lithium-iodine battery technical maturity in succession in recent years.
Suzhou Battery Plant Qiu Miaoyun, Huang Jinwen in " lithium battery lecture " (" battery " 2-5 phase in 1992) literary composition, lithium-poly-fluorocarbons battery, lithium-thionyl chloride battery, the principle of lithium sulfur dioxide cell, technology are narrated.
The Li Chengfang of department of chemistry of Fudan University, Wu Haoqing study the discharge mechanism of lithium-copper oxide cell.
The fertile willow of the Changjiang river power supply factory is studied the manufacture craft of lithium-copper oxide cell.
The Li Cheng virtue king of department of chemistry of Fudan University builds bright influence to binding agent in lithium-copper oxide cell and studies.
It is longer than other type cell that battery of lithium-iron disulphide has useful life, and be particularly suitable for the advantage of heavy-current discharge.Its high and low temperature function admirable, operating voltage height, discharge curve are level and smooth, and anti-seepage is good, and shelving performance is good, and is in light weight, do not have the mercury, cadmium or the lead that add.
The Li Min of Fudan University, Jiang Zhiyu is at " button Li/FeS and Li/FeS
2The development of battery " in (" battery " 1989 the 1st phases) literary composition, the button type battery of lithium-iron disulphide is studied.But also do not relating to aspect the column type takeup type battery of lithium-iron disulphide.
Column type takeup type battery of lithium-iron disulphide, its structure is made up of battery case, electrode, barrier film, electrolyte, encapsulant; Electrode group inside is three layers, and one deck is a positive plate, and one deck is a negative plate, and the intermediate layer is a barrier film; This utmost point group is inserted in the box hat of nickel plating, the negative lug of utmost point group contacts with the battery case bottom, and positive plate can contact with battery cover by positive pole ear; Between loam cake and housing, be inserted in the sealing ring of the macromolecular material (being generally polypropylene material) of insulation, seal the back and form cell.
Summary of the invention
The purpose of this utility model is to provide a kind of with low cost, production technology is simple, electrical property is good, capacity is high cylindrical takeup type lithium-ferrous disulfide battery anode sheet.
Described cylindrical takeup type lithium-ferrous disulfide battery anode sheet, comprise the positive electrode active materials ferrous disulfide and the fixing wire netting of positive electrode active materials, it is characterized in that: described positive electrode active materials is a pyrite after treatment, this pyrite forms sheet, and this wire netting is positioned among the pyrite of sheet.
Adopt the anode pole piece of technique scheme, have with low cost, production technology is simple, electrical property is good, the capacity advantages of higher.
Described pyrite after treatment, acetylene black, graphite, additive comprising through heat treated pyrite, compressed processing can make in the following way:
Use the natural pyrite of 200～300 purposes, logical nitrogen heat treatment 7～10h in 300～400 ℃ of high temperature ovens, the flow velocity of nitrogen can be controlled at 0.2～0.4 times the baking oven effective volume/hour.At room temperature be cooled to uniform temp then.
The acetylene black compression method is that raw material and industrial alcohol is even by 1: 1 mixed, and compacting is crossed 60 purpose moto-vibro screens in flakes on roller press then, and apparent density reaches 4～6ml/g.
Binding agent can adopt ptfe emulsion, concentration 40%～80%.
Added proper additive in the positive electrode, generally selected from following metal, they comprise the oxide of niobium, cobalt, cadmium, molybdenum, tin, lead, lithium, sodium, potassium, magnesium, aluminium, calcium, zinc, zirconium and titanium etc. and copper.Its purpose mainly is the high-tension phenomena that occurs of avoiding battery to begin to discharge and the phenomenon that has reduced lithium battery discharge back cell expansion effectively.
Described wire netting can adopt the aluminium net, and aluminium net thickness is 0.25～0.45mm, and mesh is a rhombus, aperture size: (1.2～2.0) * (2.0～2.5) mm.
The preparation technology of positive plate has following two kinds:
1) grout coating process: after the pyrite after the heat treatment, compression acetylene black, graphite, additive fully mixed, pour bath temperature into and be in 40～90 ℃ the mixer, add deionized water and industrial alcohol successively, stir 20～30min, add ptfe emulsion then and stir into cream fast.It is online that the cream of becoming reconciled is coated in aluminium, through the twin rollers extrusion forming, again through 180～200 ℃ of continuous tunnel furnace oven dry.On roller press, be rolled into the positive powder sheet of thick 0.3～0.35mm then repeatedly.
2) roll embrane method: after fully mixing back processing industry alcohol, ptfe emulsion ptfe emulsion is uniformly dispersed the pyrite after the heat treatment, compression acetylene black, graphite, additive, adds deionized water and stirring then and become cream.On the twin rollers of band heater, be rolled into film, thickness 0.2～0.3mm after becoming cream.Film is put into 100～180 ℃ of high temperature ovens toasted 6～12 hours, remove moisture content.Again film and aluminium net are rolled into repeatedly the positive powder sheet of even compact on roller press, thickness 0.3～0.35mm.
Then the positive powder sheet being cut into the positive plate of certain size, is (145～165) * (41～42) mm as the size of AA type battery, as accompanying drawing 1.Point burn-on cut out good positive plate behind the positive pole ear and carry out dried, at first carry out the normal pressure forced air drying, be about to positive plate and be tiled in and put into 200～220 ℃ a conventional oven in the stainless steel disc, dry 24～48 hours; Carry out vacuumize then, be about to positive plate and be tiled in and put into 180～200 ℃ vacuum drying oven in the stainless steel disc, cut off pumped vacuum systems after dry 24～48 hours, feed relative humidity simultaneously and be 0.1～3% dry air, after air pressure reaches constant pressure, take out and reel immediately.
Description of drawings
Fig. 1 is the anode pole piece schematic diagram of cylindrical coiled battery;
Fig. 2 is the end view of Fig. 1;
Fig. 3 is the discharge characteristic curve of AA type battery, the discharge system of battery: constant current 200mA, cut-ff voltage are 1.0V;
Fig. 4 is that AA type battery is shelved the discharge curve after 1 year, the discharge system of battery: constant current 200mA, cut-ff voltage are 1.0V.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Battery of lithium-iron disulphide in the present embodiment is the AA type, and the granularity of its positive active material is 75% 200 orders, 25% the natural pyrite of 325 purposes.It is toasted 10h under logical nitrogen protection in 350 ℃ high temperature oven, at room temperature naturally cool to uniform temp then.
Acetylene black is handled.Acetylene black raw material and industrial alcohol are by after 1: 1 the mixed, and compacting is crossed 60 purpose moto-vibro screens in flakes then on twin rollers, and apparent density reaches 4ml/g.
With pyrite, acetylene black, graphite and the additive of above-mentioned processing ball milling 3 hours in ball mill.Pour in the mixing and blending machine after mixing.Adding concentration is that 37% industrial alcohol, concentration are to stir 20min behind 60% ptfe emulsion ptfe emulsion is uniformly dispersed, and adds deionized water and stirring then and becomes cream.On the twin rollers of band heater, be rolled into film, thickness 0.2mm after becoming cream.
Film is put into 180 ℃ of high temperature oven bakings 10 hours, remove moisture content.Again film and the aluminium net roll extrusion on roller press of tiltedly drawing of cleaning are in the same place, are rolled into the positive powder sheet of even compact repeatedly, thickness 0.3mm.
With cut-off knife cathode film is cut into the pole piece of 145mm (length) * 41mm (wide), with the pole piece spot welding positive pole ear of spooling, shown in accompanying drawing 1,2, wherein, and the 1st, long ear-pole, the 2nd, short lug, the 3rd, positive plate, the 4th, high tempreture tape, the 5th, adhesive tape.
Positive plate is placed in 200 ℃ of baking ovens toasts 24h, changing temperature then over to is 180 ℃, and air pressure is lower than in the vacuum tank of 0.1MPa and cuts off pumped vacuum systems after dry 24 hours, feeds relative humidity simultaneously and be 0.1～3% dry air, after air pressure reaches constant pressure, take out and reel immediately.
This pole piece is made AA type battery through operations such as coilings.Just having carried out battery will wear out.
To carry out discharge test with the AA type lithium battery that as above flow process is made: with the 200mA constant-current discharge to 1.0V.Discharge curve as shown in Figure 5, its discharge platform is that discharge capacity is more than 3200mAh more than the 1.40V.
The AA type lithium battery that the method for using is made is shelved after 1 year and is done discharge test: with the 200mA constant-current discharge to 1.0V.Discharge curve as shown in Figure 6, its discharge platform about 1.40V, discharge capacity about 3200mAh, self-discharge rate is 1%/year.
Claims (3)
1, a kind of cylindrical lithium-ferrous disulfide battery anode pole piece, comprise the positive electrode active materials ferrous disulfide and the fixing wire netting of positive electrode active materials, it is characterized in that: described positive electrode active materials is a pyrite after treatment, this pyrite forms sheet, and this wire netting is positioned among the pyrite of sheet.
2, the anode pole piece of battery of lithium-iron disulphide as claimed in claim 1 is characterized in that: the positive electrode active materials of described positive plate comprises by acetylene black, graphite, additive through heat treated pyrite, compressed processing.
3, the anode pole piece of battery of lithium-iron disulphide as claimed in claim 1 is characterized in that: described wire netting is the aluminium net, and this aluminium net thickness is 0.25～0.45mm, and mesh is a rhombus, aperture size: (1.2～2.0) * (2.0～2.5) mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200724429U CN2783541Y (en) | 2004-08-09 | 2004-08-09 | Anode piece for column shape lithium-iron disulphide cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200724429U CN2783541Y (en) | 2004-08-09 | 2004-08-09 | Anode piece for column shape lithium-iron disulphide cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2783541Y true CN2783541Y (en) | 2006-05-24 |
Family
ID=36768521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200724429U Expired - Fee Related CN2783541Y (en) | 2004-08-09 | 2004-08-09 | Anode piece for column shape lithium-iron disulphide cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2783541Y (en) |
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2004
- 2004-08-09 CN CNU2004200724429U patent/CN2783541Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUIZHOU DESAI LITHIUM ELECTRICAL TECHNOLOGY CO., Free format text: FORMER OWNER: DESAI ENERGY SCIENCE AND TECHNOLOGY CO., LTD., HUIZHOU Effective date: 20081010 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081010 Address after: B District, No. 48 Guangdong province Huizhou City Zhongkai road Pingnan Industrial Zone, zip code: 516006 Patentee after: Huizhou Desay Battery Technology Co., Ltd. Address before: No. 2 Gu Tong Industrial Zone, Guangdong City, Huizhou Province, China: 516008 Patentee before: Desai Energy Science and Technology Co., Ltd., Huizhou |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060524 Termination date: 20130809 |