CN202205819U

CN202205819U - liquid-state flexible package lithium ion battery provided with improved air bag

Info

Publication number: CN202205819U
Application number: CN2011202699544U
Authority: CN
Inventors: 王奇志; 吴治国; 邢伟伟; 陈设军; 徐多; 杨坤; 邓开华
Original assignee: DONGGUAN JINYUAN BATTERY TECHNOLOGY CO LTD
Current assignee: DONGGUAN JINYUAN BATTERY TECHNOLOGY CO LTD
Priority date: 2011-07-28
Filing date: 2011-07-28
Publication date: 2012-04-25
Anticipated expiration: 2021-07-28

Abstract

The utility model discloses a liquid-state flexible package lithium ion battery provided with an improved air bag. The semi-finished product comprises an aluminum-plastic film, a rolling core body and an air bag, wherein the rolling core body is wrapped inside by the aluminum-plastic film, a positive lug and a negative lug are arranged on the rolling core body and are protruded outside the aluminum-plastic film; the rolling core body is wound along the horizontal direction, the aluminum-plastic film is mainly made from PP (Polystyrene), aluminium foil and nylon from inside to outside; the air bag is made from PP film, one side of the PP film butted to the aluminum-plastic film is opened, one side of the aluminum-plastic film butted to the air bag is opened; the PP film and the PP in the internal layer of the aluminum-plastic film are fused into one in a hot melting manner, and a hot melting area is arranged in the middle. In the liquid-state flexible package lithium ion battery provided with the improved air bag, the PP film is used as the air bag to replace a traditional aluminum-plastic film air bag, the PP film air bag and the PP in the internal layer of the aluminum-plastic film are fused into one. After initial charge is completed, gas in the air bag can be extracted, then the redundant PP film air bag of the part is cut, then edge hot sealing is completed. Under the premise that the battery property can not be influenced, cost can be greatly saved, and moreover, material source is more reliable and more guaranteed.

Description

A kind of liquid flexible packing lithium ion electric pond of improving air bag

Technical field

The utility model relates to the lithium ion battery product technical field, is specifically related to a kind of lithium ion battery of polyalcohol flexible packing.

Background technology

Along with development of electronic technology, the application of lithium ion battery more and more widely.Its structure of traditional polymer lithium ion is encapsulation one a volume core body in the aluminum plastic film shell; On the volume core body anode ear and negative electrode lug are arranged; An air bag is stayed in the aluminum plastic film left side when electric core encapsulates, and the effect of air bag is: the first, electrolyte is annotated in the air bag earlier, and then slowly soaks into inside battery; The second, store the gas that produces when charging for the first time.Be that air bag is that the gas that produces for the storage initial charge in the battery manufacturing process designs, after the charging and the completion of bleeding, will cut away air bag.In the manufacturing process of liquid flexible packing battery; The employed aluminum plastic film of air bag is suitable with the consumption of final aluminum plastic film that battery case uses; And aluminum plastic film all is from Japanese import at present; Account for the bigger a part of cost in liquid flexible packing lithium ion electric pond, directly make air bag for each producer easy to make at present with aluminum plastic film.And virtually completely do not have the high aluminum plastic film of necessary use cost to make air bag.

The utility model content

The technical problem that the utility model will solve provides a kind of liquid flexible packing lithium ion electric pond that makes the improvement air bag simple, that cost is low.

For solving the problems of the technologies described above; The utility model adopts following technical scheme: a kind of liquid flexible packing lithium ion electric pond of improving air bag; Comprise aluminum plastic film, volume core body and air bag; In the volume core body is wrapped in by aluminum plastic film, on the volume core body anode ear and negative electrode lug are arranged, anode ear and negative electrode lug expose in the aluminum plastic film outside; Volume core body along continuous straight runs is reeled, and aluminum plastic film is followed successively by PP, aluminium foil, nylon from inside to outside, it is characterized in that: said air bag is all processed by PP (polypropylene) film, and the side opening that the PP film docks with aluminum plastic film is the air bag interface area, and its excess-three side seal closes; The side opening that aluminum plastic film docks with air bag is the aluminum plastic film interface area; The PP film of air bag interface area docks with the internal layer PP of aluminum plastic film interface area, and is combined together to form the face seal structure, the inside of aluminum plastic film and air bag internal communication.

Preferably, the PP film of air bag and the PP of aluminum plastic film internal layer adopt the hot melting way structure together, the middle hot melt district that forms.

The utility model replaces traditional aluminum plastic film air bag through the PP film as air bag, and the PP of PP film air bag and aluminum plastic film internal layer fuses together, after initial charge is accomplished; Can the gas in the air bag be extracted out; Cut away this part unnecessary air bag then, accomplish the heat-sealing limit again, under the prerequisite that does not influence battery performance; Can save cost greatly, and the source of material more reliably, more secure.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model decomposition texture sketch map.

Among the figure, 1 is aluminum plastic film, and 2 are the volume core body, and 3 is air bag, and 4 is anode ear, and 5 is negative electrode lug, and 6 is the hot melt district, and 7 is the air bag interface area, and 8 is the aluminum plastic film interface area.

Embodiment

In the present embodiment, see figures.1.and.2 the liquid flexible packing lithium ion electric pond of said improvement air bag; Comprise aluminum plastic film 1, volume core body 2 and air bag 3; In volume core body 2 is wrapped in by aluminum plastic film 1, on the volume core body 2 anode ear 4 and negative electrode lug 5 are arranged, anode ear 4 exposes in aluminum plastic film 1 outside with negative electrode lug 5; Volume core body 2 along continuous straight runs are reeled, and aluminum plastic film 1 is followed successively by PP, aluminium foil, nylon from inside to outside; Said air bag 3 is all processed by PP (polypropylene) film, and the side opening that the PP film docks with aluminum plastic film 1 is air bag interface area 7, and its excess-three side seal closes; The side opening that aluminum plastic film 1 docks with air bag 3 is aluminum plastic film interface area 8; The PP film of air bag interface area 7 docks with the internal layer PP of aluminum plastic film interface area 8, and is combined together to form the face seal structure, the inside of aluminum plastic film 1 and air bag 3 internal communication.

The PP of the PP film of air bag 3 and aluminum plastic film 1 internal layer adopts the hot melting way structure together, the middle hot melt district that forms.

The PP hot melt of PP film and aluminum plastic film 1 internal layer; Because the PP film is directly to be heated, so the heat-sealing temperature of this side of PP film is lower, at 100-150 ℃; And the PP of aluminum plastic film need pass through nylon and the two-layer heat conduction of aluminium foil, so the heat-sealing temperature of aluminum plastic film one side will be at 200-220 ℃.

Below the utility model is done a detailed description; The above is merely the preferred embodiment of the utility model, when not limiting the utility model practical range; Be allly to do impartial change and modify, all should still belong in the utility model covering scope according to the application's scope.

Claims

1. a liquid flexible packing lithium ion electric pond of improving air bag comprises aluminum plastic film, volume core body and air bag, in the volume core body is wrapped in by aluminum plastic film, on the volume core body anode ear and negative electrode lug is arranged, and anode ear and negative electrode lug expose in the aluminum plastic film outside; Volume core body along continuous straight runs is reeled, and aluminum plastic film is followed successively by PP, aluminium foil, nylon from inside to outside, it is characterized in that: said air bag is all processed by the PP film, and the side opening that the PP film docks with aluminum plastic film is the air bag interface area, and its excess-three side seal closes; The side opening that aluminum plastic film docks with air bag is the aluminum plastic film interface area; The PP film of air bag interface area docks with the internal layer PP of aluminum plastic film interface area, and is combined together to form the face seal structure, the inside of aluminum plastic film and air bag internal communication.

2. the liquid flexible packing lithium ion electric pond of improvement air bag according to claim 1 is characterized in that: the PP film of air bag and the PP of aluminum plastic film internal layer adopt the hot melting way structure together, the middle hot melt district that forms.