Screening method for battery electrical core and battery

Abstract

The invention discloses a screening method for a battery electrical core and a battery. The screening method comprises the following steps: charging finished electrical cores; wrapping pH test paper around the surface of the electrical cores; carrying out temperature shock and pressure shock on the electrical cores wrapped with the pH test paper; and disposing the electrical cores in an environment of normal temperature and normal pressure and screening out qualified electrical cores when the electrical cores are at a normal temperature. With the screening method for the battery electrical cores, electrical cores with inferior quality in formed electrical cores are rejected, and the qualified electrical cores are screened out; therefore, output quality of batteries is improved, penetration and diffusion of electrolyte in positive and negative electrode pole pieces and diaphragms are enhanced, tiny bubbles on contact interfaces of the positive and negative electrode pole pieces and the diaphragms are reduced, impedance on the interfaces is decreased, the performance of the battery electrical cores is improved, and the cycle life of the battery electrical cores is prolonged. The screening method provided by the invention is beneficial for picking out weeping electrical cores, inflated electrical cores and electrical cores with great self-discharge.

Description

technical field [0001] The invention relates to battery shipment detection technology, in particular to a battery cell screening method and the battery. Background technique [0002] With the increasing popularity of portable electronic products and the rapid development of electric tools and electric vehicle technology, the industry's requirements for the quality of lithium-ion batteries and the consistency of lithium-ion batteries are getting higher and higher. The most common problems that affect the quality of lithium-ion batteries are: 1. The battery is swollen during electric energy storage and charge-discharge cycle use (battery swell refers to the gas generated by the side reaction inside the battery. There are many reasons for battery swell, and the common ones are: The battery is overcharged, overdischarged, the ambient temperature and humidity are too high, the sealing of the battery is not good, the battery leaks, the inside of the battery is short, the water con...

AI Technical Summary

Problems solved by technology

The most common problems that affect the quality of lithium-ion batteries are: 1. The battery is swollen during electric energy storage and charge-discharge cycle use (battery swell refers to the gas generated by the side reaction inside the battery. There are many reasons for battery swell, and the common ones are: The battery is overcharged, overdischarged, the ambient temperature and humidity are too high, the sealing of the battery is not go

Images