CN2645251Y

CN2645251Y - Coiled lithium battery electric core

Info

Publication number: CN2645251Y
Application number: CNU032378041U
Authority: CN
Inventors: 胡华光
Original assignee: Huizhou TCL Jinneng Battery Co Ltd
Current assignee: TCL Corp
Priority date: 2003-09-28
Filing date: 2003-09-28
Publication date: 2004-09-29
Anticipated expiration: 2013-09-28

Abstract

The utility model discloses a coiled type electric core for lithium batteries, which comprises a diaphragm, a positive sheet, a pole ear of the positive sheet, a negative sheet and a pole ear of the negative sheet, wherein the diaphragm is positioned between the positive and the negative sheets; the positive and the negative pole ears respectively and mutually electrically contact the positive and the negative sheets of the positive and the negative pole ears; the positive and the negative sheets and the diaphragm are coiled by a purpose-made coiled core clamp, and are coiled toward the same direction layer by layer, centre lines of the positive and the negative sheets and the diaphragm are always aligned, and the tension strength of the positive and the negative sheets and the diaphragm are consistent. At the time of pre-press shaping, the positive and the negative pole ears are maintained in the same side of the electric core, and edge distances of the positive and the negative pole ears are consistent to edge distances of both sides of the electric core. After thermal press shaping, when the electric core is packed by aluminium plastic films, the pole ears are directly led outside the aluminium plastic packaging films. The utility model solves the problems that the centre distance of the pole ears are limited by the width of the electric core and the consistency of the performance of the electric core is influenced because the pole ears are bent existing in the present coiled type electric core for lithium batteries.

Description

A kind of convoluted lithium battery electric core

Technical field

The utility model relates to a kind of convoluted lithium battery electric core, is meant a kind of improvement technology of convoluted lithium battery electric core specifically.

Background technology

At present, the structure of most convoluted lithium battery electric core all is to adopt positive and negative lug to be arranged on the mid portion of electric core, and positive and negative plate and lug thereof and barrier film are successively reeled to same direction.Owing to be to be to reel in the center with positive and negative lug, the width of electric core is inevitable bigger, for the electric core of width less than 15mm, then is difficult to take this structure so.In addition, when pack with aluminum plastic film the hot-forming back of electric core, because lug is in electric core center, just derive outside the aluminum plastic film pack case after must making lug bend to the S shape, this will have influence on the consistency of lithium battery core performance, and crooked distance is big more, and effect is just big more.

Summary of the invention

The purpose of this utility model provides a kind of battery battery core of electric core performance unanimity.

The utility model can be achieved through the following technical solutions.

A kind of convoluted lithium battery electric core includes barrier film, positive plate and lug thereof, negative plate and lug thereof; Barrier film is positioned between positive and negative plate, and positive and negative lug electrically contacts mutually with separately pole piece respectively; Positive and negative plate and barrier film are rolled to same direction by the volume core anchor clamps of special use and successively reel, and keep positive and negative plate, diaphragm center line to align tensioning dynamics unanimity all the time; The precompressed typing time makes positive and negative lug remain on the same side of electric core, and outer ledge distance and electric core both sides of the edge are apart from consistent; Behind thermocompression forming, electric core is when packing with aluminum plastic film, and lug is directly derived outside the plastic-aluminum packaging film.

The utility model compared with prior art has the following advantages.

The electric core of the utility model lithium adopts positive and negative lug to be placed in the outer same side position of electric core, make the centre-to-centre spacing of positive and negative lug be not subjected to electric core width too small restriction, particularly, also can adopt this convoluted core strueture for the electric core of width less than 15mm; In that electric core is hot-forming when packing with aluminum plastic film, positive and negative lug must not bent to the S shape derives outside the packing, but derive directly being in outer field positive and negative lug that packing is outer get final product, reduce positive and negative lug and bring inconsistent influence for electric core performance when bending to the S shape.

Description of drawings

Fig. 1 is the main cutaway view of the electric core of the utility model lithium;

Fig. 2 is the structural representation of positive plate in the electric core of the utility model lithium;

Fig. 3 is the structural representation of negative plate in the electric core of the utility model lithium;

Fig. 4 is the utility model positive and negative plate, barrier film and volume core anchor clamps clamping schematic diagram;

Fig. 5 is the partial enlarged drawing of A-A` in Fig. 4 graph of a relation;

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

As shown in Figure 1, electric core described in the utility model mainly is made up of positive pole ear 1, negative lug 2, positive plate 3, negative plate 4, barrier film 5.As shown in Figure 2, positive plate 3 is coated with positive electrode 7 by two fronts and adds folder aluminium film 9, one ends and positive pole ear 1 and electrically contact, and the other end exposes; As shown in Figure 3, negative plate 4 is coated with negative material 8 by negative pole two faces and adds folder copper film 10, one ends and negative lug 2 and electrically contact, and the other end exposes; Positive and negative plate and barrier film make its center-aligned by Fig. 4, expose the clamping position of the metal film of an end as the volume core with positive and negative plate, and clamping volume core E, be the direction rotation installing handle F of center with volume core E then by Fig. 5, keep positive plate and lug thereof skin at the volume core, successively reel, and positive and negative plate, diaphragm center line are alignd all the time, tensioning dynamics unanimity.The electricity core is successively reeled and is just extracted volume core anchor clamps when finishing out.The precompressed typing time makes positive and negative lug remain on a side of electric core, and make its outer ledge keep with electric core both sides of the edge apart from consistent, again through thermocompression forming.The electricity core is when packing with aluminum plastic film, and lug is directly derived outside the plastic-aluminum packaging film.

Claims

1. convoluted lithium battery electric core, include barrier film, positive plate and lug thereof, negative plate and lug thereof, barrier film is positioned between positive and negative plate, positive and negative plate and barrier film are successively reeled to same direction, positive and negative lug electrically contacts with separately pole piece respectively, and it is characterized in that: described positive and negative lug is placed in the outer position of electric core.

2. electric core according to claim 1 is characterized in that: described positive and negative lug is positioned at outermost one deck of electric core, and is in the homonymy of electric core simultaneously.

3. electric core according to claim 2 is characterized in that: described positive and negative lug outer ledge is consistent apart from the distance of electric core both sides of the edge.

4. electric core according to claim 1 is characterized in that: described positive plate is in the periphery.

5. according to the described arbitrary electric core of claim 1 to 4, it is characterized in that: this electricity core rolls for adopting private volume core anchor clamps, and described anchor clamps comprise intermediate plate, and an end of intermediate plate connects volume core, other end connection handle.