Lithium battery with stable negative plate

Abstract

The invention discloses a lithium battery with a stable negative plate, comprising a cylindrical battery body. The battery body has a positive end and a negative end, the positive end is disposed at the top of the battery body, the negative end includes a cylindrical surface negative end and a bottom surface negative end arranged on the cylindrical surface and bottom surface of the battery body respectively, the lithium battery also comprises a negative plate welded to the negative end of the battery body as well as a negative plate fastener, the negative plate is composed of a welding fixing segment and a limiting fixing segment, the welding fixing segment of the negative plate is fixedly welded to the cylindrical surface negative end of the battery body, and the limiting fixing segment is fixedly connected to the battery body through the negative plate fastener. A position of the negative plate of the lithium battery relative to a battery pole is highly stable, the influence of multi-directional strong shock on the connection of the battery pole and the plates can be largely reduced, stability of a battery charging-discharging process in the vibrational environment is improved, the risks such as changes in current loading capacity of a connection and separation arcing are reduced, the life of the battery is prolonged, the practicality of the battery is improved, and the battery has high economic benefit.

Description

Technical field: [0001] The invention relates to a lithium battery with a stable negative electrode sheet, and relates to the technical field of batteries. Background technique: [0002] Among all forms of energy, electric energy is the easiest to use, the cleanest, the most environmentally friendly, and the most efficient energy. Batteries are the best device for storing electric energy. Among all battery products, lithium batteries are currently the youngest, most advanced, and technologically advanced in the world. The energy product with the highest gold content and the highest energy density is widely used in electric vehicles. The main structure of a cylindrical lithium battery includes the casing, the positive and negative plates and separators placed in the casing after winding, and the cover sheet on the top of the sealed casing. The negative tabs of the battery are gathered at the bottom of the battery. During the manufacturing process, the negative electrode piec...

AI Technical Summary

Problems solved by technology

The main structure of a cylindrical lithium battery includes the casing, the positive and negative plates and separators placed in the casing after winding, and the cover sheet on the top of the sealed casing. The negative tabs of the battery are gathered at the bottom of the battery. During the manufacturing process, the negative electrode piece needs to be welded to the bottom surface of the shell. When used, the shell of the cylindrical lithium battery is used as the negative electrode. However, the negative electrode pieces of many cylindrical lithium batteries have not been effectively limited. The bit structure is directly welded (or metal tightly connected) to the negative terminal of the shell. The connection point is easily affected by the vibration of the pole piece or the battery, and the connection stability is not high, which will increase the desoldering at the negative terminal connection point of the battery. (disengagement) risk

During the charging and discharging process of the battery, if the current carrying capacity of the connection point changes, it will directly affect the temperature rise at the connection point, and then affect the life of the battery; in severe cases (instantaneous detachment), the arc generated may break down the thinner negative electrode metal, causing catastrophic consequences such as leakage

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