Battery cell charging method, battery full-life-cycle charging method and system

Abstract

The invention discloses a battery cell charging method and a battery full-life-cycle charging method and system, and belongs to the battery management field. The battery cell charging method comprisesthe following steps of if a charging current is controlled within a safe range and second charging time tc2 is not less than first charging time tc1, carrying out tc1 charging on a battery cell; andif a charging voltage is controlled within the safe range and the tc1 is not less than the tc2, carrying out tc2 charging on the battery cell, wherein the tc1 is longest time when the battery cell isunder an overcharge voltage during charging and an irreversible damage is not formed yet; the tc2 is the longest time when the battery cell is under an overcharge current during charging, and the irreversible damage is not formed yet. The battery charging method comprises the following steps of calculating a charging pulse of a next moment according to real-time data of the battery, the tc1, the tc2 and change information of first relaxation time and second relaxation time so that the battery has the longest time of the highest bearable charging voltage or the highest charging current in a healthy state till that the battery is fully charged. In the invention, under a condition that a requirement of consistency of the battery cell is reduced, low-cost and good-balance rapid charging is realized.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a battery charging method, a battery full life cycle charging method and a system. Background technique [0002] Electrochemical energy storage has many advantages, such as short construction period and return on investment period, low environmental requirements, distributed construction, and suitable for distributed renewable energy storage. Therefore, it is one of the important energy storage technologies for the Energy Internet. How to develop a battery system with high safety, good economy, environmental protection and good reproducibility is the core problem of solving distributed energy storage. [0003] Charging technology is one of the keys to the healthy and safe use of battery systems. Unreasonable charging methods will greatly shorten battery life, and even cause potential safety hazards. The recent frequent spontaneous combustion of lithium battery electr...

AI Technical Summary

Problems solved by technology

Due to the consideration of power consumption and cost, the balance current of the traditional active battery management system is generally around 5A. Therefore, its balance ability is limited, and the requirements for battery cells in groups are high.

In addition, the balance method of the active battery management system is not closely related to the charging algorithm; and the active balance algorithm is controlled by the model and has a weak dependence on historical data

[0006] It can be seen that during the charging proc

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