CN205177957U - Cylindrical soft package lithium -ion battery - Google Patents

Abstract

The utility model relates to a lithium-ion battery, more specifically to a cylindrical soft-packed lithium-ion battery, which uses a positive cap and a negative contact piece instead of a pole lug as a connection terminal with electrical equipment, which is convenient to install and replace, and adopts aluminum Plastic composite film and heat-shrinkable film are used as the shell of lithium-ion batteries. Compared with hard-shell batteries, the risk of explosion is reduced. They can replace hard-shell batteries and are directly installed in the battery compartment to facilitate the assembly of batteries and electrical equipment. Can meet the individual requirements of customers.

Description

A cylindrical soft package lithium ion battery

technical field

The utility model relates to a lithium ion battery, in particular to a cylindrical soft package lithium ion battery.

Background technique

Lithium-ion batteries have the advantages of high specific energy and long cycle life, and are the main power source of mobile devices such as mobile phones and notebook computers. Its shell mainly includes hard shell (steel shell, aluminum shell and PP hard shell) and soft package (using aluminum-plastic composite film). Hard-shell lithium-ion batteries generally have safety hazards of explosion, and aluminum-plastic composite film is used to replace the above-mentioned hard shell. The soft-packed lithium-ion battery with the shell material as the packaging component has the advantages of high energy density, light weight, and variable shape, and is the preferred power source for various digital electronic products.

Compared with hard-shell lithium-ion batteries, soft-pack lithium-ion batteries have a big disadvantage that the whole battery is relatively soft. Generally, unlike hard-shell batteries, they can be directly installed and taken out of the battery compartment of electrical equipment. They are usually made of aluminum. 1. The tab made of nickel material is used as the battery output terminal, which is welded or riveted on the electrical equipment, which makes it inconvenient to disassemble the entire battery from the electrical equipment. However, a large number of existing portable mobile products, such as flashlights, digital cameras, etc. , have a battery compartment, the user can install and remove the battery directly in the battery compartment, so this is a key factor that limits the replacement of hard-shell batteries by soft-pack lithium-ion batteries.

Utility model content

In order to overcome the above-mentioned deficiencies in the existing technology of soft-packed lithium-ion batteries, the utility model provides a battery with reasonable structure design, simple process, very convenient installation and removal in the battery compartment of electric equipment, and can replace hard-shell batteries. Soft-packaged lithium-ion battery is a cylindrical soft-packaged lithium-ion battery widely used in the field of portable electrical equipment such as flashlights, digital cameras, and electronic cigarettes.

The technical scheme adopted by the utility model to solve its technical problems is: adopt aluminum-plastic composite film as the main part of the shell of the lithium-ion battery, wind the battery core from the positive electrode sheet, diaphragm, and negative electrode sheet into the shell, and put the positive electrode sheet and negative electrode into the shell. The tabs are connected with tabs. After the battery core is packaged with aluminum-plastic composite film, the positive tab protrudes from the aluminum-plastic composite film and is connected to the positive cap; the negative tab also protrudes from the aluminum-plastic composite film. Connected to the protective plate, the protective plate is connected to the negative electrode contact piece through the wire, and finally the above parts are packaged together with heat shrinkable film, so as to increase the rigidity of the battery, so that the whole battery can be directly replaced in the battery compartment of the electrical equipment.

The utility model has the advantages that the cylindrical soft-packaged lithium-ion battery has the following advantages: its shell is composed of aluminum-plastic composite film and heat-shrinkable film, which reduces the risk of explosion and improves safety compared with hard-shell batteries; The adoption of the battery can replace the hard-shell battery and be directly installed in the battery compartment, which is convenient for the assembly between the battery and the electrical equipment, and can meet the individual requirements of customers.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is a schematic structural view of the utility model, and Fig. 2 is a schematic view of its appearance.

In the picture: 1. Batteries, 2. Aluminum-plastic composite film, 3. Heat shrinkable film, 4. Positive pole ear, 5. Negative electrode tab, 6. Positive cap, 7. Protection plate, 8. Negative contact piece, 9. Wire.

detailed description

The implementation of the utility model will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation of the utility model, and are only examples. At the same time, it will become clearer and easier to understand by illustrating the advantages of the present utility model.

As shown in Figure 1: a cylindrical soft-packaged lithium-ion battery, which consists of a casing, a battery cell, a protective plate, and positive and negative electrodes; the battery cell (1) is wound from a positive electrode sheet, a diaphragm, and a negative electrode sheet. Put it into a shell made of aluminum-plastic composite film (2), the positive pole piece of the battery cell is connected with the positive pole tab (4), the negative pole piece of the battery cell is connected with the negative pole tab (5), and the battery cell (1) is made of aluminum-plastic composite After the film (2) is packaged, the positive pole tab (4) is protruded and connected to the positive pole cap (6), and the negative pole tab (5) is similarly protruded from the aluminum-plastic composite film (2) and connected to the protective plate (7 ), the protective plate (7) is connected to the negative electrode contact piece (8) through a wire (9), and finally the positive electrode cap (6), the negative electrode contact piece (8) and the protective plate (7) are sealed with heat shrinkable film (3). It is tightly packaged with the whole battery, and its appearance is shown in Figure 2 after packaging.

The utility model is a cylindrical soft-packaged lithium-ion battery. The shell is composed of aluminum-plastic composite film and heat-shrinkable film. Compared with the hard-shell battery, the danger of explosion is reduced and the safety is improved. The positive electrode cap and the negative electrode contact piece are adopted. , can replace the hard-shell battery and be directly installed in the battery compartment, which is convenient for the assembly between the battery and the electrical equipment, and can meet the individual requirements of customers.

Claims (3)

1. A cylindrical flexible package lithium-ion battery, which is made of shell, electric core, protective plate, positive and negative poles; it is characterized in that: said shell is made up of aluminum-plastic composite film and heat-shrinkable film; Described electric core is made of positive electrode The positive and negative electrodes are connected with lugs; the protection plate is composed of a protection circuit; the positive and negative electrodes are composed of a positive cap and a negative contact, and the positive cap and the positive pole Ear connection, the negative contact piece is connected to the protective plate, and the protective plate is connected to the negative pole lug; after the battery is packaged in a shell made of aluminum-plastic composite film, and then the positive electrode cap, negative electrode contact piece and protective plate are made of heat shrinkable film Packaged together. 2. A cylindrical soft-packaged lithium-ion battery according to claim 1, wherein the positive electrode cap is stamped from a stainless steel sheet or a copper sheet, and the middle part is convex. 3. A soft-pack lithium-ion battery according to claim 1, characterized in that: the negative electrode contact piece is an aluminum disc.