Energy-storing cylindrical lithium ion battery used for solar street lamp and preparation method thereof

Abstract

The invention discloses an energy-storing cylindrical lithium ion battery used for a solar street lamp and a preparation method thereof. The lithium ion battery includes a steel shell, an upper cover, a thermistor, an air permeable plate, two lugs including a positive pole lug and a negative pole lug, a plurality of pole pieces including positive pole pieces and negative pole pieces, and a sensor. The air permeable plate is arranged under the thermistor. A safety valve sheet is disposed between the thermistor and the air permeable plate. A gasket is installed in the steel shell. A plurality of diaphragm layers are arranged on the lower end of the gasket, wherein the positive pole pieces and the negative pole pieces are disposed in chambers between the diaphragm layers. The positive pole lug and the negative pole lug are arranged at the two ends of the diaphragm layers. The positive pole lug is installed on the lower end of the air permeable plate. The invention also discloses a preparation method of the energy-storing cylindrical lithium ion battery. The method includes the steps of: raw material preparation, coating, roller pressing, cutting, winding, assembly, roasting, electrolyte injection, cleaning, formation, aging and capacity sorting. The lithium ion battery has simple preparation method, high electric capacity and wide discharge temperature range and can satisfy the demand of energy storage of the solar street lamp.

Description

technical field [0001] The invention relates to the technical field of production of cylindrical lithium-ion batteries, in particular to an energy-storage cylindrical lithium-ion battery for solar street lamps and a preparation process thereof. Background technique [0002] A battery refers to a cup, tank or other container or a part of a composite container that contains an electrolyte solution and a metal electrode to generate current. It is a device that can convert chemical energy into electrical energy. The battery has a positive pole and a negative pole. The battery is used as an energy source. It can get stable voltage, stable current, stable power supply for a long time, and current with little influence from the outside world, and the battery structure is simple, easy to carry, easy to charge and discharge, stable and reliable performance, and the battery is used in all aspects of modern social life. play a big role. Due to its high voltage platform, high energy de...

AI Technical Summary

Problems solved by technology

The temperature applicable range of the existing energy storage cylindrical lithium-ion battery is -20°C-60°C when it is discharged, and the temperature range is narrow, which cannot meet the energy storage use of solar street lights. In winter in the northernmost part of China, it needs to be used at -30°C-40°C. The operating temperature of street lamps in southern summer is close to 60°C-70°C. The existing cylindrical lithium-ion batteries can either be discharged at -40°C or 70°C, but cannot be discharged at both -40°C and 70°C.

[0003] In addition, the traditional cylindrical lithium-ion battery production process is complicated, the operation is difficult, and the production efficiency is low.

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