3 Conclusion This article proposes a micro short circuit diagnosis method for battery packs to address the safety issues during their aging process. After a micro short circuit occurs in the battery, it will continuously consume electrical energy, causing the relative chargi...

Conduct consistency analysis of Kn-n-1 and j values for the remaining modules, and the box plots of Kn-n-1 and j values for each module are shown in Figure 11. According to the statistics of module numbers with abnormal Kn-n-1 and j values, as shown in Table 3, module 1 and module 2 are abnorm...

Analyzing the battery pack Δ At the same time as C, inspect the battery pack's various modules Δ U for analysis. Figure 5 shows the voltage curves of each module at the end of each charge in three battery pack tests, which can be calculated Δ U. Each module Δ The U-curve is shown in Fi...

(2) Calculate the difference between the voltage of each module at the end of each charging of the battery pack and the voltage of each module at the end of the subsequent charging Δ U and compare with each other, select Δ The corresponding charging data with a smaller U value can be selecte...

The Kn-n-1 and j values of a certain monomer are abnormal and repeated the most frequently as abnormal values, which may be due to the high DC internal resistance of the monomer. Screening the monomer based on DC internal resistance does not affect the diagnostic results and can improve the ac...

1.2 Diagnosis of battery pack micro short circuit After obtaining the relative charging time of each individual charge in the battery pack, the difference in relative charging time between two adjacent charges of the individual can be calculated, and the Kn-n-1, j values can...

The battery pack composed of these six units in series stopped charging when the No. 6 unit first reached the charging cut-off voltage of 3.65V at tn and 0:00, while the other five units were not fully charged. If it is possible to continue charging a single unit that is not fully charged in t...

In response to the difficulties of the above two methods, this article proposes a micro short circuit diagnosis method for battery packs using the time and voltage during the charging process of the battery pack. Its advantage is that only the charging data of the battery pack is required, wit...

Abstract: Lithium batteries are widely used in new energy electric vehicles and energy storage due to their superior performance. However, the micro short circuit problem of lithium batteries is a safety hazard related to both vehicle and energy storage battery packs during use. In order to di...

It is understood that the battery consists of a negative electrode made of carbon fiber and a positive electrode made of aluminum foil coated with lithium phosphate. They are separated by glass fiber fabric, which serves as a structural electrolyte matrix. It can transport lithium ions between...