CN203521483U

CN203521483U - Lithium-ion power battery

Info

Publication number: CN203521483U
Application number: CN201320433473.1U
Authority: CN
Inventors: 李杨; 张火成
Original assignee: Tianjin Lishen Battery JSCL
Current assignee: Tianjin Lishen Battery JSCL
Priority date: 2013-07-19
Filing date: 2013-07-19
Publication date: 2014-04-02
Anticipated expiration: 2023-07-19

Abstract

The utility model relates to the technical field of lithium-ion batteries and in particular discloses a lithium-ion power battery. The lithium-ion power battery comprises a metal shell, wherein an insulation protection layer is arranged on the whole surface of the inner wall of the metal shell; insulation protection layers are arranged on the surface of the outer wall of the metal shell except for the area on which a battery cover is welded. According to the lithium-ion power battery, the insulation protection layers are arranged on most of the outer layer and the overall inside of the lithium-ion power battery, so that the risk of corrosion to the inside of the battery shell is reduced, the risk of external short circuit of the battery is also reduced, and finally, the purposes of prolonging the service life of the battery and improving the quality rate of the battery are also achieved.

Description

A kind of lithium-ion-power cell

Technical field

The utility model relates to battery technology field, particularly relates to a kind of lithium-ion-power cell.

Background technology

Lithium ion battery due to have specific energy high, recycle often, the advantage such as memory time is long, its not only on portable electric appts as mobile phone, Digital Video and laptop computer are used widely, and be widely used in the big-and-middle-sized electrical equipments such as electric automobile, electric bicycle and electric tool.

Along with the development of lithium electricity industry, people are heated up gradually to the interest of electric motor car industry, and the thing followed is the concerns of people to performance of lithium ion battery, large-scale production and fail safe.Box hat, aluminum hull etc. have the lithium-ion-power cell of metal shell as the main flow of present stage development, also more and more receive people's concern.

Metal shell in the lithium-ion-power cells such as existing box hat, aluminum hull generally can not carry out insulation processing, so the inner and outer wall of its metal-back all has conductivity, thereby after battery manufacture completes, the electrolyte of inside battery, both positive and negative polarity whether can and metal-back inwall react, thereby cause corrosion, we are unknown, and battery just has potential risks like this; When much thering is the battery of metal shell, carry out connection in series-parallel when assembling simultaneously, between metal-back, can touch unavoidably, the situation of battery short circuit is also difficult to avoid, and finally causes and loses efficacy or even security incident, and this all can increase the potential risk that battery is used virtually.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art and a kind of lithium-ion-power cell with metal shell is provided, and is conducive to reduce the risk of the generation corrosion of power battery with metal shell.

For achieving the above object, the technical solution adopted in the utility model is as follows:

A lithium-ion-power cell, comprises metal shell, and the whole wall of the inwall of described metal shell is provided with insulating protective layer, on the wall of the outer wall of described metal shell, except the region for battery cover welding, is equipped with insulating protective layer.

A kind of lithium-ion-power cell that the utility model provides, because it is all provided with insulating protective layer in outer major part and inside, thereby has reduced the risk of battery case internal corrosion; Also reduced the risk of external short-circuit of battery, finally reached the object that improves battery simultaneously, and simple in structure.

Accompanying drawing explanation

The structural representation of the metal shell of the lithium-ion-power cell that Fig. 1 provides for the utility model.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model is further elaborated.

Shown in Figure 1, the figure shows the structure of the metal shell of the lithium-ion-power cell that the utility model embodiment provides, for convenience of explanation, only show the part relevant with the utility model embodiment.

A kind of lithium-ion-power cell; comprise metal shell 1; the whole wall of the inwall of described metal shell 1 is provided with built-in electrical insulation protective layer 2, on the wall of the outer wall of described metal shell 1 except the 4(weld zone, region for battery cover welding) be equipped with exterior insulation protective layer 3.

Described built-in electrical insulation protective layer 2, exterior insulation protective layer 3 can adopt the method for physics or chemistry to form, and the composition of protective layer can be one or several in oxidation film, phosphate layer, chromate film, chromic acid-phosphate layer.

A kind of lithium-ion-power cell with the metal shell of protective layer that the utility model provides; because metal shell surface has formed nonconducting protective layer by the method for physics or chemistry; thereby greatly reduce the inner risk that corrosion occurs of metal shell; also reduced the probability of battery short circuit simultaneously; thereby reach the useful life that extends battery, improve the object of battery yields.

In the utility model, the inwall of described metal shell is all insulated layer and covers, and so just guarantees that electrolyte does not contact with the metal shell inwall of battery, avoids the problems such as shell corrosion, thereby improves the security performance of battery.

The lithium-ion-power cell that the utility model provides, because it is all provided with insulating protective layer in outer major part and inside, thereby has reduced the risk of battery case internal corrosion; Also reduced the probability of the risk of external short-circuit of battery, finally reached the object that improves battery simultaneously.

The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims

1. a lithium-ion-power cell, comprises metal shell, it is characterized in that, the whole wall of the inwall of described metal shell is provided with insulating protective layer, on the wall of the outer wall of described metal shell, except the region for battery cover welding, is equipped with insulating protective layer.