Automatic formation and separation method of nickel-metal hydride batteries

Abstract

The invention relates to an automatic formation and separation method of nickel-metal hydride batteries. The automatic formation and separation method of nickel-metal hydride batteries comprises the following steps of: (1) self-adapting charging process: charging the batteries in the process; (2) constant current discharging process: discharging the charged batteries by constant current and then entering a third step after finishing discharging; (3) separation process: adopting two steps to carry out separation, wherein the first step of separation is carried out according to voltage changes V of each battery in the step (1); the voltage change V is Vt-V0, Vt is a voltage value after the batteries are charged, and V0 is a voltage value before the batteries are charged; the second step of separation is further thinning separation based on a separation result of the first step and is carried out according to a battery capacity value Q measured in the first step; Q is sigma delta f(i)*deltat; and f(i) expresses an average current value within the time of deltaT. The separation is exact by adopting the method.

Description

technical field [0001] The invention relates to the field of nickel-hydrogen battery production, in particular to an automatic component selection method for nickel-hydrogen batteries. Background technique [0002] Nickel-metal hydride batteries are generally called secondary batteries because they can be repeatedly charged and discharged, and they can be used as power batteries for cars. The power battery pack requires the consistency of each battery in the battery pack, which mainly refers to the charging and discharging speed and battery capacity of the battery. At this stage, battery manufacturers have been using the traditional manual operation method, using manual loading and unloading, and manual sorting of batteries, which is labor-intensive and has obvious human errors; in recent years, many manufacturers have improved the formation equipment and used the host computer to collect battery formation signals. And to display the battery information and then perform man...

AI Technical Summary

Problems solved by technology

At this stage, battery manufacturers have been using the traditional manual operation method, using manual loading and unloading, and manual sorting of batteries, which is labor-intensive and has obvious human errors; in recent years, many manufacturers have improved the formation equipment and used the host computer to collect battery formation signals. And to display the battery information and then perform manual sorting, but in this method, the upper computer algorithm is simple, only need to record the battery charging time and discharging time according to the initial input constant current value to indicate the battery capacity, which cannot truly and accurately reflect The chemical changes inside the battery, and the formation process of the secondary battery is controlled by time, resulting in the inconsistency of the battery formation; at the same time, manual sorting will also increase the human factor in the battery sorting