CN205335331U - Gasket under cylinder type lithium cell - Google Patents

Abstract

A cylindrical lithium battery lower gasket, comprising a circular body, a circular hole is opened in the middle of the body, an opening corresponding to the width of the negative electrode tab is formed on the edge of the body, and a long strip shape is opened on the body. The length of the tab perforation corresponds to the width of the negative tab, and the tab perforation and opening are respectively located on both sides of the circular hole. At least two lug perforations parallel to each other are provided on the body, and connecting ribs are formed between adjacent two lug perforations. The utility model is provided with a circular hole in the middle, an opening on the edge, and two ear perforations on the corresponding side. Compared with the prior art, the utility model can fix the negative pole lug through the opening on the edge and the two pole lug perforations, so as to reduce the probability of failure during electric welding of the negative pole lug and the steel shell, and effectively improve the electric welding rate of the pole lug. Improve production efficiency and reduce production costs.

Description

Gasket under a cylindrical lithium battery

technical field

The utility model relates to a battery lower gasket, in particular to a cylindrical lithium battery lower gasket.

Background technique

With the rapid development of modern industry, the society's demand for energy is increasing day by day. At present, 85% of the world's energy comes from fossil energy, and the environmental pollution caused by it is becoming more and more serious. The strategy of sustainable development and the mitigation of energy crisis and environmental crisis are of great significance. Lithium batteries are widely used in aerospace, electric vehicles, notebooks and mobile phones due to their high energy density, no memory effect, high voltage and no pollution. However, the production cost of lithium batteries is relatively high at this stage, and how to effectively reduce the cost in the production process has become an important research direction for lithium batteries.

At present, the shape structure of the gasket under the cylindrical lithium battery adopts a circular structure. During the production process, there will be a problem that the negative electrode lug is off-center during spot welding, resulting in spot welding failure, resulting in an increase in the scrap rate of steel shells and batteries. Large, low production efficiency, thereby increasing production costs.

Contents of the invention

The purpose of the utility model is to provide a cylindrical lithium battery lower gasket which can effectively fix the tab of the negative electrode, improve the production efficiency and reduce the production cost.

In order to achieve the above object, the technical solution adopted by the utility model is:

A cylindrical lithium battery lower gasket, comprising a circular body with a circular hole in the middle of the body, characterized in that the edge of the body is recessed inwards and has an opening corresponding to the width of the negative electrode lug, and the body is also provided with There are elongated tab perforations, the length of which corresponds to the width of the negative tab, and the tab perforations and openings are respectively located on both sides of the circular hole.

According to the lower gasket of a cylindrical lithium battery, it is characterized in that at least two tab perforations parallel to each other are provided on the body, and connecting ribs are formed between two adjacent tab perforations.

The utility model is provided with a circular hole in the middle, an opening on the edge, and two ear perforations on the corresponding side. Compared with the prior art, the utility model can fix the negative pole lug through the opening on the edge and the two pole lug perforations, so as to reduce the probability of failure during electric welding of the negative pole lug and the steel shell, and effectively improve the electric welding rate of the pole lug. Improve production efficiency and reduce production costs.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the connection between the utility model and the negative pole tab.

In the attached picture:

1. Opening; 2. Body; 3. Round hole; 4. Ear perforation; 5. Connecting rib; 6. Negative pole ear.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

A cylindrical lithium battery lower gasket, as shown in Figure 1 and Figure 2, includes a circular body 2, a circular hole 3 is opened in the middle of the body 2, and the edge of the body 2 is recessed inward to form a hole with the negative electrode tab 6. Opening 1 corresponding to the width, the body 2 is also provided with a long tab hole 4, the length of the tab hole 4 corresponds to the width of the negative tab 6, the tab hole 4 and the opening 1 are respectively located in the circular hole 3 sides.

In this embodiment, at least two tab through holes 4 parallel to each other are provided on the body 2 , and connecting ribs 5 are formed between two adjacent tab through holes 4 .

Claims (2)

1. A cylindrical lithium battery lower gasket, including a circular body (2), with a circular hole (3) in the middle of the body (2), characterized in that the edge of the body (2) is recessed inwards and has a There is an opening (1) corresponding to the width of the negative pole tab (6), and a strip-shaped tab perforation (4) is also opened on the body (2). The length of the tab perforation (4) is the same as that of the negative pole tab (6) Corresponding to the width of the tab, the lug perforation (4) and the opening (1) are respectively located on both sides of the circular hole (3). 2. A cylindrical lithium battery lower gasket according to claim 1, characterized in that at least two tab perforations (4) parallel to each other are opened on the body (2), and two adjacent tab holes are Connecting ribs (5) are formed between the lug perforations (4).