Lithium ion battery

Abstract

The invention belongs to the field of batteries, and specifically relates to a lithium ion battery. The lithium ion battery provided by the invention comprises an electrolytic solution, a current collector and a battery box, as well as positive and negative pole columns which penetrate through the wall of a battery box from inside to outside and are used for leading current out, and the positive and negative pole columns comprise an inner pole column positioned on the inner cavity of the battery box and at a wall thickness region and an outer pole column extending out of the battery box; and the current collector is convexly provided with a pole ear in an extending manner, the pole ear and the inner pole column are fixedly connected and arranged, and a sealed insulation layer covers the part of the pole ear, the inner pole column and a joint between the pole ear and the inner pole column, which at least contacts with the electrolytic solution. The lithium ion battery provided by the invention has the advantages that the structure is simple, an electroplating phenomenon is effectively buffered, the charge-discharge efficiency of the lithium battery is improved, the oscillation of a contacting ohm internal resistance of the battery is effectively restrained, and the use consistency of the battery is improved; and the cycling life of the battery is greatly prolonged, the high manufacturing cost of the lithium ion battery at present is effectively reduced, and finally, the lithium ion battery provides a guarantee for manufacturers to rapidly expand the market.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a lithium ion battery. Background technique [0002] Lithium-ion batteries are widely used in the field of consumer electronics due to their high energy density, good cycle performance, and low self-discharge. With the intensification of energy consumption day and night, the problem of global warming has become prominent, and now PM2.5 has become a hot topic, and more and more people are beginning to pay attention to the health hazards of pollutants in the air, and "green transportation" has once again attracted attention. Electric vehicles are the best strategy to lift the shackles of oil around China's neck, and large-capacity power batteries are the key to electric vehicles. When the current lithium-ion batteries are actually used, on the one hand, it is often found that their actual working performance is far lower than the ideal working performance. This is even more ob...

AI Technical Summary

Problems solved by technology

When the current lithium-ion batteries are actually used, on the one hand, it is often found that their actual working performance is far lower than the ideal working performance. This is even more obvious after long-term use. In addition to the normal charge and discharge loss, are there other reasons? As a result of the above situation, technicians are often puzzled; on the other hand, the cost of lithium batteries remains high, and how to further reduce their production costs under the premise of ensuring their work performance or even reducing their work performance is a problem that plagues existing batteries. Technical problems for those skilled in the art

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