CN2388712Y

CN2388712Y - Lithium ion cell packaging case

Info

Publication number: CN2388712Y
Application number: CN 99244912
Authority: CN
Inventors: 慈云祥; 周恒辉; 陈继涛; 岳载
Original assignee: Peking University
Current assignee: Peking University
Priority date: 1999-09-22
Filing date: 1999-09-22
Publication date: 2000-07-19
Anticipated expiration: 2009-09-22

Abstract

The utility model relates to a packaging casing of a lithium ion battery, which is composed of a plastic film and an aluminum foil or is composed of a plastic box and an outer cover. The utility model replaces common metal materials, reduces production cost, simplifies production process, reduces production apparatuses and provides advantageous conditions for popularizing and applying lithium ion batteries.

Description

A kind of package casing of lithium ion battery

The utility model relates to a kind of package casing of lithium ion battery.

At present, common lithium ion battery all is to be encapsulated in the can on the market, at lid mouth extraction electrode; and with some press full protection device, structure comparatively the complexity, produce such lithium ion battery; required investment of production equipment is bigger, and technology is cumbersome, the cost height.

The purpose of this utility model is, provides a kind of price just to declare, and is easy to the package casing of the lithium ion battery produced again, reduces production costs to reach, and simplifies the purpose of production technology

The package casing of lithium ion battery of the present utility model is that core of lithium ion cell is formed therein with plastic film and aluminium foil plastic packaging, being about to core of lithium ion cell places between two films, film is as internal layer, aluminium foil is outer, again with plastic packaging machine heat seal encapsulation, form battery case, plastic film wherein can be used the 1-3 layer, and the thickness of film and aluminium foil respectively is 0.1-1mm; Perhaps make plastic casing and lid thereof earlier with injection moulding, core of lithium ion cell is put into box, close the lid, plastic packaging forms battery case, in order to guarantee the air-tightness of battery, but on the surface of shell vacuum evaporating layer of aluminum film, thickness 0.1-2mm.Available polyethylene or polypropylene or polyvinyl chloride etc. such as described plastic film or plastic casing, but and not only can the insulating but also plastics that thermoplastic closes of other type.

Excellent characteristics of the present utility model and effect:

1. the used material of shell is cheap.2. processing technology is simple.3. equipment investment is few.4. product safety is reliable.

Brief Description Of Drawings:

Fig. 1 is the lithium ion battery dressed up with plastic film and aluminium foil plastic packaging and the schematic diagram of shell thereof:

1 is core of lithium ion cell; 2 and 3 is the battery case that plastic film and aluminium foil plastic packaging dress form, and wherein 2 are the outside around the shell of hot pressing formation: 4 is electrode.

Fig. 2 is with the lithium ion battery of boxlike encapsulation and the schematic diagram of shell thereof:

5 is core of lithium ion cell; 6 is the casing of lithium ion battery with the plastic casing encapsulation; 7 is lid; 8 is encapsulating material; 9 is electrode.

In order to be illustrated more clearly in the present invention, enumerate the following example, but it there is not any restriction to scope of the present invention.

Embodiment 1.

As shown in Figure 1, core of lithium ion cell being placed between the plastic film that two block sizes equate, is internal layer with the film, and aluminium foil be outer, then, with thermoplastic machine heat seal encapsulation, forms the battery case (3) that has (2) outside the 3-5 millimeter.Lithium ion battery with similar mobile phone Cd.928 is an example, with long 5.2cm, and wide 3.8cm, the polyethylene film of thick 0.1-0.5cm is an internal layer, with the aluminium foil identical with the thin and thick of film size is skin, core of lithium ion cell is placed between two blocks of plastic films, with heat sealing machine heat seal wind dress.

Embodiment 2,

As described in Figure 2, core of lithium ion cell is put into polypropylene plastic box, close the lid, add envelope moulding material envelope thereon and mould, can form battery case.In order to guarantee the air-tightness of shell, can plate the layer of aluminum film at outer surface.With similar mobile phone Mt.338 type lithium ion battery is example, the high 4.9cm of described plastic casing, wide 3.4cm, thick 0.8cm, box wall thickness 1.5mm, the box bed thickness 0.5-0.6mm that aluminizes outward.

Claims

1. the package casing of a lithium ion battery, it is characterized in that, described shell is that core of lithium ion cell is formed therein with plastic film and aluminium foil plastic packaging, perhaps is made of plastic casing and vinyl cover, and core of lithium ion cell is packed in the box, close the lid, again through plastic packaging, after plastic packaging is good, in case surface spraying plating layer of aluminum film, perhaps aluminium spraying film not

2. according to the described package casing of claim 1, it is characterized in that described plastic film or plastic casing and lid thereof are polyethylene or polyacrylic,

3. according to the described package casing of claim 1, it is characterized in that described plastic film or plastic casing and lid thereof are polyvinyl chloride.