CN202817039U

CN202817039U - Lithium battery cell

Info

Publication number: CN202817039U
Application number: CN2012205251568U
Authority: CN
Inventors: 陈清运
Original assignee: LUODE ELECTRONIC MACHINERY CO Ltd
Current assignee: LUODE ELECTRONIC MACHINERY CO Ltd
Priority date: 2012-10-15
Filing date: 2012-10-15
Publication date: 2013-03-20
Anticipated expiration: 2022-10-15

Abstract

A lithium battery cell comprises a mandrel, a first isolating membrane, a second isolating membrane, an anode membrane, a cathode membrane and an outer cover membrane. The first isolating membrane comprises a first initial reversely folding section, a first middle section and a first ending section; the second isolating membrane comprises a second initial reversely folding section, a second middle section and a second ending section; the first initial reversely folding section and the second initial reversely folding section are located outside the mandrel by the device; the anode membrane, the first middle section, the cathode membrane and the second middle section are sequentially wound outside the mandrel in an overlapping mode; the first ending section and the second ending section end the winding; and the outer cover membrane covers outside the second ending section and comprises a heat sealing portion. Therefore, the production efficiency can be improved and the production cost can be reduced.

Description

The battery of lithium battery

Technical field

The utility model relates to a kind of lithium battery, particularly relates to a kind of battery of lithium battery.

Background technology

As shown in Figure 1 and Figure 2, the battery 10 of general lithium battery has a plug 11, one first barrier film 12, one second barrier film 13, a cathode film 14, a negative electrode film 15, an interior rubberizing 16, an outer rubberizing 17 and an insulating paper 18.

This first barrier film 12 has one first initial segment 121, one first interlude 122 and one first ending segment 123.

This second barrier film 13 has one second initial segment 131, this second interlude 132 and one second ending segment 133.

This cathode film 14 is positioned at a side of this first interlude 122.

This negative electrode film 15 is positioned at the opposite side of this first interlude 122, and between this first interlude 122 and this second interlude 132, by this first barrier film 12 and this second barrier film 13 this cathode film 14 and this negative electrode film 15 is isolated.

During manufacturing; one section of rubberizing 16 posts on this first initial segment 121 and this second initial segment 131 at first will being somebody's turn to do; during coiling; another section of rubberizing 16 posts outside this plug 11 in will being somebody's turn to do again; make this first initial segment 121 and this second initial segment 131 obtain the location; then begin to reel a few; then with this cathode film 14; this first interlude 122; this negative electrode film 15 and this second interlude 132 be stacked being wound on outside this plug 11 sequentially; finish Deng this first ending segment 123 and these second ending segment, 133 coilings; should outer rubberizing 17 adhering on this second ending segment 133 makes this second ending segment 133 obtain the location; make battery semi-finished product this moment; at last; before these battery semi-finished product are inserted a battery case; need to re-use manually at these a few insulating papers 18 of battery semi-finished product outer cladding or insulated plastic glued membrane to become this battery 10; can protect the element that is wrapped by by this insulating paper 18, and then guarantee the using character of lithium battery.

This battery 10 should post between this second initial segment 131 and this plug 11 in interior rubberizing 16, should outer rubberizing 17 post at this second ending segment 133, although can make this second initial segment 131, this second ending segment 133 obtain the location, but have and to carry out the rubberizing operation and cause the relatively poor shortcoming of production efficiency, in addition, need to use manually at this this insulating paper 18 of battery semi-finished product outer cladding, it is relatively poor then to have production efficiency, and the higher higher shortcoming of production cost that causes of purchase cost of this insulating paper 18.

Summary of the invention

The purpose of this utility model is to provide a kind of and can enhances productivity, the battery of the lithium battery that can reduce production costs.

The battery of the utility model lithium battery comprises a plug, one first barrier film, one second barrier film, a cathode film, a negative electrode film and a peplos, it is characterized in that:

This first barrier film comprises one first initial reflexed section, one first interlude and one first ending segment.

This second barrier film comprises one second initial reflexed section, one second interlude and one second ending segment.

This cathode film is positioned at a side of this first interlude.

This negative electrode film is at the opposite side of this first interlude and between this first interlude and this second interlude.

Wherein, the second initial reflexed section of the first initial reflexed section of this first barrier film and this second barrier film is by sandwiched this mandrel outer that is positioned at, this cathode film, this first interlude, this negative electrode film, this second interlude be stacked this mandrel outer that is wound on sequentially, this first ending segment and this second ending segment finish to reel, and this peplos is coated on outside this second ending segment and comprises a heat-sealing section.

The battery of lithium battery described in the utility model, this peplos also comprise one with stacked built-in section of this first ending segment.

The battery of lithium battery described in the utility model, the second initial reflexed section of the first initial reflexed section of this first barrier film and this second barrier film himself is extended between this first barrier film and this plug of reeling by sandwiched being positioned at from the first initial reflexed section.

The beneficial effects of the utility model are: by with this first initial invayination and sandwiched this mandrel outer that is positioned at of this second initial invayination, and encapsulate this plug, this first barrier film, this second barrier film, this cathode film, this negative electrode film by this peplos, can enhance productivity, can reduce production costs.

Description of drawings

Fig. 1 is the exploded plane graph of the battery of general lithium battery;

Fig. 2 is the combination view of the battery of general lithium battery;

Fig. 3 is the decomposition view of battery one preferred embodiment of the utility model lithium battery;

Fig. 4 is the combination view of this preferred embodiment.

Embodiment

Below in conjunction with drawings and Examples the utility model is elaborated.

As shown in Figure 3, Figure 4, this preferred embodiment of the battery 2 of the utility model lithium battery comprises a plug 20 and is wound on plug 20 one first barrier film 30, one second barrier film 40, a cathode film 50, a negative electrode film 60 and a peplos 70 outward.

This first barrier film 30 comprises one first initial reflexed section 31, one first interlude 32 and one first ending segment 33.

This second barrier film 40 comprises one second initial reflexed section 41, one second interlude 42 and one second ending segment 43, and sequentially align this first initial reflexed section 31, this first interlude 32 and this first ending segment 33.

This cathode film 50 is positioned at a side 321 of the first interlude 32 of this first barrier film 30.

This negative electrode film 60 is positioned at the opposite side 322 of this first interlude 32, and between this first interlude 32 and this second interlude 42.

This cathode film 50 and second interlude 42 isolation of this negative electrode film 60 by the first interlude 32 with this second barrier film 40 of this first barrier film 30.

This peplos 70 is coated on outside the second ending segment 43 of this second barrier film 40, has a heat-sealing section 71, preferably, this peplos 70 also have one with stacked built-in section 72 of the first ending segment 33 of this first barrier film 30.

In this preferred embodiment, this first barrier film 30 is all SP film (separator) with this second barrier film 40, and this cathode film 50 is the aluminium film, and this negative electrode film 60 is the copper film, and this peplos 70 is PP film (polypropylene).

During manufacturing, first this plug 20 is sleeved on outside the volume pin (not shown) of a up-coiler, and one first guide wheel group (not shown) by this up-coiler is with this first barrier film 30 and this second barrier film 40 this plugs 20 that lead, then this first barrier film 30 is pressed against outside this plug 20 with this second barrier film 40, insert to this first barrier film 30 and this second barrier film 40 by a plastic cutter (not shown) immediately and form this first initial reflexed section 31 and this second initial reflexed section 41, then by one second guide wheel group (not shown) with this cathode film 50 and this negative electrode film 60 these plugs 20 of guiding, the operation of reeling immediately, mainly with this cathode film 50, the first interlude 32 of this first barrier film 30, the second interlude 42 of this negative electrode film 60 and this second barrier film 40 is stacked coiling sequentially, this first initial reflexed section 31 is positioned at outside this plug 20 by sandwiched with this second initial reflexed section 41 simultaneously, namely himself extended between this first barrier film 30 and this plug 20 of reeling by sandwiched being positioned at from this first initial reflexed section 31, make the coiling operation can be quick, carry out smoothly, when fast approaching finishes to reel, this first ending segment 33 and this second ending segment 43 are respectively the coiling end of this first barrier film 30 and this second barrier film 40, by one the 3rd guide wheel (not shown) with this peplos 70 these plugs 20 of guiding, and make this built-in section 72 the first ending segment 33 with this first barrier film 30 stacked, the operation that continues to reel makes this built-in section 72 by sandwiched location, when finishing to reel, this peplos 70 is coated on outside the second ending segment 43 of this second barrier film 40, at last, form this heat-sealing section 71 by this peplos 70 of a hot-die head (not shown) hot pressing, just can be by these peplos 70 these plugs 20 of encapsulation, this first barrier film 30, this second barrier film 40, this cathode film 50, this negative electrode film 60 makes this battery 2 simultaneously.

By above explanation as can be known, the battery of the utility model lithium battery has following beneficial effect:

One, the utility model can be by sandwiched location when reeling with the second initial invayination 41 of this second barrier film 40 by the first initial invayination 31 of this first barrier film 30, compared to general battery, the utility model can omit interior rubberizing, can reduce production costs.

Two, the utility model is by these peplos 70 these plugs 20 of encapsulation, this first barrier film 30, this second barrier film 40, this cathode film 50, this negative electrode film 60, compared to general battery, the utility model can omit the rubberizing operation of outer rubberizing and the coating operation of insulating paper, can enhance productivity, can omit outer rubberizing and insulating paper to reduce production costs.

Claims

1. the battery of a lithium battery comprises a plug and is wound on one first barrier film, one second barrier film, a cathode film, a negative electrode film and a peplos of mandrel outer, it is characterized in that:

This first barrier film comprises one first initial reflexed section, one first interlude and one first ending segment;

This second barrier film comprises one second initial reflexed section, one second interlude and one second ending segment;

This cathode film is positioned at a side of this first interlude;

This negative electrode film is at the opposite side of this first interlude and between this first interlude and this second interlude;

2. the battery of lithium battery according to claim 1 is characterized in that:

This peplos also comprise one with stacked built-in section of this first ending segment.

3. the battery of lithium battery according to claim 1 is characterized in that:

The second initial reflexed section of the first initial reflexed section of this first barrier film and this second barrier film himself is extended between this first barrier film and this plug of reeling by sandwiched being positioned at from the first initial reflexed section.