High-magnification cylindrical power lithium ion battery

Abstract

The invention belongs to a high-magnification cylindrical power lithium ion battery. The high-magnification cylindrical power lithium ion battery comprises a nickel plating steel shell, an electrolyte arranged inside the nickel plating steel shell and a lithium ion battery cell arranged inside the nickel plating steel shell, wherein the lithium ion battery cell comprises a positive plate, a first membrane, a negative plate and a second membrane which are overlapped and wound in sequence; the positive plate comprises an aluminum foil, a positive lead-out end and positive active substance layers arranged on the inner ring surface and the outer ring surface of the aluminum foil, an aluminum positive lug is mounted on the positive lead-out end, the widths of the positive active substance layers are the same as the width of the aluminum foil, and the lengths of the positive active substance layers are 30-80 mm; the negative plate comprises a copper foil, a negative lead-out end and negative active substance layers arranged on the inner ring surface and the outer ring surface of the copper foil, a nickel negative lug is mounted on the negative lead-out end, the widths of the negative active substance layers are the same as the width of the copper foil, and the lengths of the negative active substance layers are 33-83 mm. The high-magnification cylindrical power lithium ion battery has the advantages of simple assembling and high rate of finished products, and the heat dissipation, high-magnification performance and cycle performance of the battery can be improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery production, and in particular relates to a high-rate cylindrical power lithium-ion battery. Background technique [0002] Lithium-ion batteries have the characteristics of high output voltage, high specific energy, stable discharge voltage and long cycle life. Therefore, lithium-ion batteries have been widely used in notebook computers, digital cameras, and mobile phones. And it has been applied more and more in the field of power and energy storage. In the field of power, when lithium-ion batteries are applied to electric tools, electric toys, and electric vehicles, the batteries need to have better high-current charge and discharge performance. [0003] At present, power lithium-ion batteries include square batteries and cylindrical batteries; there are liquid batteries and polymer batteries. No matter which kind of battery has the problem of overheating itself, if the lithium-ion...

AI Technical Summary

Problems solved by technology

No matter which kind of battery has its own overheating problem, if the lithium-ion battery itself overheats, it will not only cause the battery itself to run out of heat, but also smoke, catch fire, or even explode, and cause a fire, causing many unnecessary losses

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