CN2904320Y

CN2904320Y - Column lithium ion cell

Info

Publication number: CN2904320Y
Application number: CNU200620103403XU
Authority: CN
Inventors: 傅理平
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-05-01
Filing date: 2006-05-01
Publication date: 2007-05-23
Anticipated expiration: 2016-05-01

Abstract

A column lithium ion battery consists of a positive pole, a negative pole and a column battery core coiled by the septum between the positive pole and the negative pole, a casing equipped outside the battery core; the head's difference length of the superposition of the positive pole and the septum is H; the head's difference length of the superposition of the positive pole and the septum is H; all the difference length H of the positive poles are welded together to be an positive pole weld layer, which is equipped with an extracted positive pole ear; all the difference length Hs of the negative poles are welded together to be an negative pole weld layer, which is equipped with an extracted negative pole ear. As the length H of the positive pole, septum, and negative pole are laid in disorder, the positive pole welds the length H together by ultrasonic welding machine after coiled to column, so does the negative pole; the positive pole ear or the negative pole ear is extracted after welding. Thereby the column lithium ion battery has the advantages of high power, good intensity of pole ear extraction, long service life,etc.

Description

Column lithium ion battery

Technical field

The utility model relates to a kind of column lithium ion battery, particularly a kind of lithium ion battery of large-capacity high-power of the electrical source of power that can be used as electric motor car.

Background technology

Lithium ion battery has the specific energy height, and it is long to recycle the life-span, and characteristics such as volume is little, light weight, security performance height, is used widely at aspects such as mobile communication, notebook computers.Along with the development of material science, lithium battery can reduce cost, and further can use in electric motor car.At present, the lithium ion battery of large-capacity high-power is according to the shape difference, can be divided into cylindrical or square, and after general column lithium ion battery positive electrode, barrier film, negative electrode reel, positive electrode, negative electrode are directly drawn with lug from an end respectively, therefore, influence the power of battery on the one hand, on the other hand owing to positive electrode, negative electrode material are aluminium foil, Copper Foil, under high current charge-discharge, or behind the bump, occur fracture easily, thereby influence the quality and the useful life of battery.

Summary of the invention

The purpose of this utility model is in order to overcome the defective of prior art, and it is firm to provide a kind of positive electrode, negative electrode to draw lug, makes the battery high power, use reliable, the column lithium ion battery that the life-span is long.

The technical scheme of the utility model column lithium ion battery is: comprise by positive electrode, negative electrode, between positive electrode and negative electrode, there is membrane coil to make columniform battery, housing is installed outside battery, the equitant head gap of its positive electrode and barrier film length is H, the equitant head gap of negative electrode and barrier film length is H, the gap length H of each positive electrode welds the positive electrode weld layer that connected together, the positive electrode weld layer has the positive electrode lug of drawing, the gap length H of each negative electrode welds the negative electrode weld layer that connected together, and the negative electrode weld layer has the negative electrode lug of drawing.The technical program is the placement of staggering of H owing to the head between positive electrode, barrier film, the negative electrode has gap length respectively, each layer positive electrode connects together length H weldering with ultrasonic welding machine after being rolled into cylinder, the length H of each layer negative electrode also welds and is connected in all, draws positive electrode lug or negative electrode lug respectively after weldering connects.Therefore, compared with the prior art have the power height, positive electrode, negative electrode to draw lug firm, characteristics such as battery long service life.

The utility model column lithium ion battery, the material of its positive electrode are aluminium foil, and the material of negative electrode is a Copper Foil.The material of its barrier film is polypropylene or polyethylene.

Description of drawings

Fig. 1 is that the head gap length of launching before anodal aluminium foil, barrier film, the negative copper foil of the utility model column lithium ion battery do not rolled up to stagger is that H places schematic diagram;

Fig. 2 is that two, side that the battery of the utility model column lithium ion battery is reeled after welding is that weld layer connects the lug schematic diagram;

Fig. 3 is that the utility model column lithium ion battery section is the spirality schematic diagram.

Embodiment

The utility model relates to column lithium ion battery, as shown in Figure 1-Figure 3, comprise by positive electrode 1, negative electrode 2, barrier film 3 is arranged through rolling into columniform battery 5 between positive electrode 1 and negative electrode 2, housing 4 is installed in outside in battery, its major technology is characterised in that (as shown in Figure 1) positive electrode 1 and the head length of barrier film 3 overlaid settings stagger, its gap length is H, negative electrode 2 is H with barrier film 3 equitant head gap length, the concrete numeral of H is 1 millimeter-20 millimeters, represent different length and can weld, battery after being rolled into is welded the positive electrode weld layer 11 that connected together with the gap length H of each positive electrode 1, the positive electrode weld layer has the positive electrode lug 12 of drawing, as shown in Figure 2, the gap length H of each negative electrode 2 welds the negative electrode weld layer 21 that connected together, and the negative electrode weld layer has the negative electrode lug 22 of drawing.The power height of this battery under high current charge-discharge, perhaps avoids occurring shortcomings such as fracture behind the bump, battery quality is good, long service life.The material of its positive electrode 1 is an aluminium foil, and the material of negative electrode 2 is a Copper Foil.The material of its barrier film 3 is that similar materials such as polypropylene or polyethylene are made.

Claims

1, column lithium ion battery, comprise by positive electrode (1), negative electrode (2), between positive electrode (1) and negative electrode (2), there is barrier film (3) to roll into columniform battery (5), housing (4) is installed outside battery, it is characterized in that positive electrode (1) and the equitant head gap of barrier film (3) length are (H), negative electrode (2) is (H) with the equitant head gap of barrier film (3) length, the gap length (H) of each positive electrode (1) is welded the positive electrode weld layer (11) that connected together, the positive electrode weld layer has the positive electrode lug (12) of drawing, the gap length (H) of each negative electrode (2) is welded the negative electrode weld layer (21) that connected together, and the negative electrode weld layer has the negative electrode lug (22) of drawing.

2, column lithium ion battery as claimed in claim 1, the material that it is characterized in that positive electrode (1) is an aluminium foil, the material of negative electrode (2) is a Copper Foil.

3, column lithium ion battery as claimed in claim 1, the material that it is characterized in that barrier film (3) is polypropylene or polyethylene.