CN101807716A

CN101807716A - Lithium oxide power battery

Info

Publication number: CN101807716A
Application number: CN201010129860A
Authority: CN
Inventors: 庄安中; 何自鹰
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-22
Filing date: 2010-03-22
Publication date: 2010-08-18
Anticipated expiration: 2030-03-22
Also published as: CN101807716B

Abstract

The invention discloses a lithium oxide power battery. A positive pole thereof is composed of an aluminum foil and positive pole coating material coated outside the aluminum foil; the positive pole coating material is composed of 55%-58% of lithium iron oxide mixing slurry and 42%-45% of carbon powder mixing slurry by weight percent; the lithium iron oxide mixing slurry is composed of the following raw materials in part by weight: 91.5 parts of lithium iron oxide, 3 parts of conductive carbon black SP and 4.5 parts of adhesive 900 PVDF; the carbon powder mixing slurry is composed of the following raw materials in part by weight: 94 parts of carbon black, 1 part of conductive carbon black SP, 2 parts of thickening agent cmc and 3 parts of adhesive SBR. As the positive pole coating material thereof is mainly made of lithium iron oxide powder, the lithium oxide power battery according to the invention has the advantages of high working voltage, large energy, small volume, light weight, long cycling life, cycling charge and discharge times up to 2000 or more, low self-discharge rate, no memory effect and good environmental friendliness.

Description

Lithium oxide power battery

Technical field

The present invention relates to a kind of lithium dynamical battery, relate in particular to a kind of lithium oxide power battery.

Background technology

Storage battery is the power producer of electric automobile.At present, the key of restriction electric automobile development is that power accumulator is undesirable.The main performance index of accumulator of electric car is specific energy, specific power and useful life.Electric automobile can be competed mutually with internal-combustion engines vehicle, key be develop that specific energy height, specific power are big, long service life and the low storage battery of cost.

Prior art medium power storage battery mainly contains lead acid accumulator, nickel-hydrogen accumulator, nickel-cadmium cell, sodium sulfur storage battery and lithium ion battery.Lead acid accumulator has two big shortcomings: the one, and specific energy is low, and shared quality and volume are too big, and the distance travelled of once charging is shorter; Two are to use the life-span short, and use cost is too high.Nickel-hydrogen accumulator production cost height, price is expensive, is difficult for popularizing.Nickel-cadmium cell has quick charge, recycle and long advantage of life-span, but the price height has memory effect, causes the battery active volume to reduce easily because discharge and recharge bad, and cadmium is poisonous in addition, easily causes environmental pollution.Sodium sulfur storage battery needs at 300 ℃～350 ℃, the heat tracing that battery operated needs are certain, so high temperature corrosion is serious, battery life is shorter.Lithium ion battery is as the rechargeable battery of novel high voltage, high-energy-density, physics that it is unique and chemical property, prospect with the utilization of civilian widely and national defence, its outstanding characteristics are: in light weight, energy storage is big, pollution-free, memory-less effect and long service life; Under with volume weight situation, the electric power storage ability of lithium battery is 1.6 times of Ni-MH battery, be 3 times of nickel-cadmium cell, and can not pollute environment, it is a kind of real environmental protection battery, be the at present best battery that can apply in the electric motor car, but people have only developed 20%～30% of its theoretical electric weight at present.

Summary of the invention

At weak point of the prior art, the invention provides a kind of easy processing, cost is lower, the bigger and stable better lithium oxide power battery of capacity.

Lithium oxide power battery provided by the invention comprises positive pole, negative pole, electrolyte and barrier film; Described positive pole is made up of the aluminium foil anodal class coating material outer with being coated in aluminium foil; Described anodal class coating material is sized mixing by 55%～58% lithium iron oxide mixing slurry and 42%～45% carbon powder by weight percentage and is formed;

Described lithium iron oxide mixing slurry is made up of the raw material of following weight portion: lithium iron oxide: 91.5, conductive carbon black SP:3 and binding agent 900PVDF:4.5 form;

Described carbon powder is sized mixing and is made up of the raw material of following weight portion: carbon element: 94, conductive carbon black SP:1, thickener cmc:2 and binding agent SBR:3 form.

Beneficial effect of the present invention: the anodal class coating material of lithium oxide power battery of the present invention makes its this lithium oxide power battery have the operating voltage height based on the lithium iron oxide powder, and energy is big, volume is little, light weight, it is longer to recycle the life-span, cycle charge discharge 〉=2000 time; It is low to have self-discharge rate simultaneously, memory-less effect, the advantage of environmental protection.

Description of drawings

Fig. 1 is lithium oxide power battery discharge characteristic curve figure at normal temperatures;

Fig. 2 is a lithium oxide power battery cycle charge-discharge performance diagram at normal temperatures;

Fig. 3 is the discharge characteristic curve figure of lithium oxide power battery under the varying environment temperature;

Fig. 4 is a lithium oxide power battery storage characteristics curve chart at normal temperatures.

Embodiment

Below in conjunction with the drawings and specific embodiments the present invention is done to describe in further detail.

Lithium oxide power battery comprises positive pole, negative pole, electrolyte and barrier film, and described positive pole is made up of the aluminium foil anodal class coating material outer with being coated in aluminium foil.Anodal class coating material is sized mixing by 55%～58% lithium iron oxide mixing slurry and 42%～45% carbon powder by weight percentage and is formed.Lithium iron oxide mixing slurry is made up of the raw material of following weight portion: lithium iron oxide: 91.5, conductive carbon black SP (super p): 3 and binding agent 900PVDF:4.5 form; Carbon powder is sized mixing and is made up of the raw material of following weight portion: carbon element: 94, conductive carbon black SP:1, thickener cmc:2 and binding agent SBR:3 form.

The main assembling process of lithium oxide power battery is: 1) make class coating material: according to above-mentioned ratio raw material is mixed, after high-speed stirred is even, make the anode sizing agent of pulpous state; 2) smear: the slurry of making is coated in the surface of metal forming equably, and anode pole piece is made in oven dry; 3) assembling: put well by the top-down order of positive plate-barrier film-negative plate-barrier film, make Battery Pole Core,, promptly finish the assembling process of battery, make the finished product battery again through technical process such as inject electrolyte, seal through coiling.

Wherein, the making of anodal class coating material comprises the steps: 1) at first carbon powder is sized mixing and binding agent 900PVDF evenly mix; 2) will extract lithium iron oxide to be added and conductive carbon black SP by said ratio then, the lithium iron oxide to be added and the conductive carbon black SP that extract are divided into 2～3 parts, and add in batches that carbon powder is sized mixing and the mixed pulp of binding agent 900PVDF in, behind a lithium iron oxide of every adding and the conductive carbon black SP, and stir into uniform sizing material, add another part lithium iron oxide again and conductive carbon black SP stirs.

Different material (by weight) is carried out charge-discharge test according to the lithium oxide power battery of above-mentioned explained hereafter, test result shows to have higher charge/discharge capacity, operating voltage height (being more than 4 times of nickel-cadmium cell nickel-hydrogen battery) is as following table (is example to make model 700AHA).

Simultaneously, the lithium oxide power battery of being made by raw material of the present invention is carried out the cycle charge-discharge number of times under the normal temperature, flash-over characteristic and the test of the storage characteristics under the normal temperature under the varying environment temperature, respectively as Fig. 2, Fig. 3 and shown in Figure 4, the result shows that the cycle life of lithium oxide power battery is longer, self-discharge rate is low, all can operate as normal under-45 ℃～55 ℃ ambient temperature.

Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims

1. a lithium oxide power battery comprises positive pole, negative pole, electrolyte and barrier film; Described positive pole is made up of the aluminium foil anodal class coating material outer with being coated in aluminium foil; It is characterized in that: described anodal class coating material is sized mixing by 55%～58% lithium iron oxide mixing slurry and 42%～45% carbon powder by weight percentage and is formed;