CN201336331Y

CN201336331Y - Negative electrode lithium alloy tape for primary battery

Info

Publication number: CN201336331Y
Application number: CN 200820176371
Authority: CN
Inventors: 贺慧; 马祖华; 李海波; 郁宇骏
Original assignee: Zhongyin Ningbo Battery Co Ltd
Current assignee: Zhongyin Ningbo Battery Co Ltd
Priority date: 2008-11-10
Filing date: 2008-11-10
Publication date: 2009-10-28
Anticipated expiration: 2018-11-10

Abstract

The utility model discloses a negative pole lithium alloy area for primary cell, be 0.01% ~ 10% lithium aluminium alloy main part including aluminium content the embedding foil net that inlays that does not participate in the reaction in the middle of the lithium aluminium alloy main part, the thickness of inlaying the foil net is 5% ~ 20% of lithium aluminium alloy area thickness. The mesh area of the metal foil mesh-inlaid net accounts for 30-90% of the whole net surface. The utility model discloses owing to having imbedded the metal foil net that does not participate in the battery system reaction in the alloy lithium area, can improve the electrical property in the middle and later stages of battery reaction, the battery is when using, negative pole lithium can be along with the compound of the continuous formation lithium that carries on of reaction, lithium compound is under organic solution's effect, generate the non-conductive solid film on lithium area surface, in the middle and later stages of battery use, resistance increases, influence the electrical property, add the metal foil net, can be in the whole use of battery, keep good electric conductivity, react completely until the lithium metal.

Description

Negative electrode lithium alloy tape for primary battery

Technical Field

The utility model relates to a negative pole lithium area of lithium cell.

Background

The chemical power sources commonly used for small-sized civil electronic and electric products and small-sized instruments and equipment at present have various types, and are mainly divided into an aqueous solution system and an organic solution system on the basis of a used electrolytic liquid system, wherein the rated voltage of the chemical power source of the aqueous solution system is generally 1.2V-2.0V, such as nickel cadmium, nickel hydrogen, lead acid, zinc manganese, zinc silver, zinc air and the like; the rated voltage of the chemical power source of the organic solution system is generally 3.0V-4.2V, and such batteries as lithium ion batteries, lithium-manganese batteries, lithium-thionyl chloride batteries, lithium-sulfur dioxide batteries and the like, and some voltages are below 2V, such as lithium-iron disulfide batteries and the like.

In contrast, the chemical power supply of the aqueous solution system is easy to manufacture, the system is safe, and the chemical power supply is widely used for small household electrical appliances and electronic products, but the chemical power supply has the defects of low specific capacity, poor high-power discharge performance, poor storage performance and the like, and the defects of the chemical power supply are gradually shown when the chemical power supply is used for electronic electrical appliances with continuously increased functions and more power consumption at present.

The chemical power supply of organic solution system has high specific capacity, good discharge performance of large current and large power, and long storage period of 5-10 years.

In a chemical power supply of an organic solution system, a lithium-iron disulfide battery has a rated voltage of 1.5V and can be used with a zinc-manganese battery and a nickel-cadmium battery. The nickel-hydrogen and zinc-silver batteries are used alternatively, and the discharge platform is stable, the storage performance is good, and the power performance, the low-temperature performance and other performance indexes are good. At present, many enterprises and research institutions are researching and developing lithium-iron disulfide batteries. The lithium-iron disulfide battery technology has been greatly developed, but some problems still exist. Such as safety problems when the battery is impacted, the influence of the change of lithium metal on the electrical properties in the middle and later discharge periods of the battery, and the like.

Currently, the IEC standards established internationally provide high standards for the safety of lithium batteries, and the battery structure, the positive electrode and the electrolyte are most studied, while the negative electrode is few.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model aims to provide a negative pole lithium alloy area for battery once, with the battery of this kind of negative pole lithium alloy area preparation, reduction electric core that can be effective warp to improve the security performance of battery.

The utility model provides a technical scheme that its technical problem adopted is: a negative electrode lithium alloy belt for a primary battery comprises a lithium aluminum alloy main body with the aluminum content of 0.01% -10%, an embedded metal foil mesh which does not participate in reaction is embedded in the middle of the lithium aluminum alloy main body, one end of the embedded metal foil mesh extends out of the lithium aluminum alloy main body, and the thickness of the embedded metal foil mesh is 5% -20% of that of the lithium aluminum alloy belt.

The negative electrode lithium-aluminum alloy belt for the primary battery is characterized in that the mesh area of the inlaid metal foil net accounts for 30-90% of the whole net surface.

The negative electrode lithium-aluminum alloy strip for the primary battery is characterized in that the metal embedded in the metal foil mesh is aluminum, nickel or copper.

The utility model discloses owing to embedded into the metal foil net that does not participate in the battery system reaction in the alloy lithium area, can improve the electrical property in the middle and later stages of battery reaction, the battery is when using, negative pole lithium can be along with the compound of the continuous formation lithium of going on of reaction, lithium compound is under organic solution's effect, generate the non-conductive solid film on lithium area surface, in battery middle and later stages of using, resistance increases, influence the electrical property, add the metal foil net, can be in the whole use of battery, keep good electric conductivity, react completely until lithium metal.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a longitudinal sectional view of fig. 1.

Detailed Description

As shown in fig. 1 and 2, the utility model discloses a negative pole lithium alloy belt for primary cell, it includes that the aluminium content is 0.01% -10% lithium aluminum alloy main part 1, imbeds the inlay metal foil net 2 that does not participate in the reaction in the middle of lithium aluminum alloy main part 1, and the one end of inlaying metal foil net 2 stretches out in lithium aluminum alloy main part 1, and the thickness of inlaying metal foil net 2 is 5% -20% of lithium aluminum alloy belt 1 thickness. The area of the mesh 3 of the metal foil mesh embedded accounts for 30-90% of the whole mesh surface. The embedded foil mesh metal 2 includes metals such as aluminum, nickel and copper that do not participate in the reaction of the battery system.

The utility model discloses both imbed other metal foil nets in the lithium alloy area, the metal foil net is made by the metal that does not participate in the battery system reaction, inlays in the lithium alloy, like this under the unchangeable condition of lithium alloy area thickness, can increase the tensile strength in lithium area, takes the battery of making with this kind of lithium alloy, and electric core intensity increases, and when the battery received external force and assaulted, can effectually reduce electric core deformation to improve the security performance of battery.

Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.

Claims

1. A negative electrode lithium alloy ribbon for a primary battery, characterized in that: the aluminum-aluminum alloy strip comprises a lithium-aluminum alloy main body with the aluminum content of 0.01% -10%, wherein an embedded metal foil net which does not participate in reaction is embedded in the middle of the lithium-aluminum alloy main body, one end of the embedded metal foil net extends out of the lithium-aluminum alloy main body, and the thickness of the embedded metal foil net is 5% -20% of that of a lithium-aluminum alloy strip.

2. The negative electrode lithium alloy ribbon for a primary battery according to claim 1, characterized in that: the mesh area of the metal foil mesh-inlaid net accounts for 30-90% of the whole net surface.

3. The negative electrode lithium alloy ribbon for primary batteries according to claim 1 or 2, characterized in that: the metal in the inlaid metal foil net is aluminum, nickel or copper.