Screening and matching method for improving consistency of lead-acid storage battery pack

Abstract

The invention relates to a screening and matching method for improving consistency of a lead-acid storage battery pack. The screening and matching method comprises the steps of assorting batteries with relatively approximate discharge cut-off voltage values and relatively approximate static recovery voltage values; placing the same type of the batteries into a low-temperature sealing environment, enabling the batteries to be located in a magnetic field region of magnetic field source emission controlled by a modulation device, and measuring an open-circuit voltage deviation value of each battery after a period of time; placing the same type of the batteries in the high-temperature sealing environment, and enabling the batteries to be located at the magnetic field region of the magnetic field source emission controlled by the modulation device, and measuring the open-circuit voltage deviation value of each battery after a period of time; and finally matching the batteries with relatively approximate open-circuit voltage deviation values after the low-temperature process and relatively approximate open-circuit deviation values after the high-temperature process into a same battery pack for serial connection. By matching, the batteries in the same group have good consistency, the service life of the battery pack is prolonged efficiently, and the safety of the battery pack is improved.

Description

technical field [0001] The invention relates to the field of lead-acid battery manufacturing, in particular to a screening and grouping method for improving the consistency of lead-acid battery groups. Background technique [0002] Lead-acid batteries have been produced and applied for more than 100 years, and currently occupy a large proportion in the field of battery applications, especially in electric bicycles. With the rise of other new energy battery technologies and changes in the market environment Higher requirements are placed on the cycle life of lead-acid batteries. [0003] The production process of lead-acid batteries mainly includes grid manufacturing, paste mixing, plate coating, plate curing, plate formation, and battery assembly. In these processes, the formation and assembly of lead paste is very important in the production process of lead-acid batteries. The assembly process is to connect multiple batteries in series to form a battery pack. In the assem...

AI Technical Summary

Problems solved by technology

[0005] The invention mainly solves the technical problems that the original lead-acid storage battery assembly method is single, and single cells with good consistency cannot be accurately selected for battery assembly, resulting in a short service life of the battery pack and potential safety hazards; it provides an improved lead-acid storage battery Group consistency screening and matching method, which can accurately select single cells with good performance consistency to form a battery pack, effectively prolonging the service life of the battery pack and improving the safety of the battery pack