Fault mechanism study on Li‐ion battery at over‐discharge and its diagnosis approach

Wu, Chao; Zhu, Chunbo; Sun, Jinlei; Jianhu, Jiang

doi:10.1049/iet-est.2016.0024

Cited by 24 publications

(9 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Common conditions include Li plating due to fast or lowtemperature charging or path-dependent aging; mild overcharge and overdischarge due to faulty or less-resilient sensors and management; nonuniform aging due to aggressive use or inadequate or faulty management; internal and external shorts due to latent manufacturing defects or incorrect use, inappropriate fixturing, or cell damage and aging; and divergent aging due to cell-to-cell variability. 17,[25][26][27][28][29][30][31][32][33][34][35][36][37][38] Literature surveys indicate the existence of a diverse set of diagnostics for LiB cells-diagnosing Li plating, [39][40][41][42][43][44] overcharge, [45][46][47] overdischarge, 45,48,49 internal shorts, [50][51][52][53] external shorts, [54][55][56] and electrode-and cell-level inhomogeneities 28,[57][58][59][60][61][62] -employing various thermal, electrochemical, acoustic, and entropy-based methods, often combined with different modeling-based approaches. Most of these methods are still in development; therefore, they have not been extended to module, string, or pack levels.…”

Section: Cell-level Diagnosticsmentioning

confidence: 99%

Challenges and needs for system-level electrochemical lithium-ion battery management and diagnostics

2021

View full text Add to dashboard Cite

The desire for energy-dense and fast-charged battery technology in consumer electronics, electric vehicle, grid, and aviation applications is pushing the envelope from materials to cell and pack designs. However, some approaches could inherently decrease safety of the battery-thus requiring the development of advanced management and diagnostics. Safety of lithium-ion batteries (LiBs), particularly in multicell configurations, is highly variable and could evolve with use. Existing works primarily focus on cell life and safety diagnostics without considering module and pack-level uncertainties and sometimes imply that cell-level electrochemical diagnostics would work in modules or packs, a naive oversimplification. Using example case studies, we highlight the potential and challenges associated with extending single-cell diagnostics to multiple cells, note the existing gaps, and motivate the research, development, and support communities to devote efforts to fill the gap by developing diagnostics at these levels for current-and future-generation LiBs.

show abstract

Section: Cell-level Diagnosticsmentioning

confidence: 99%

Challenges and needs for system-level electrochemical lithium-ion battery management and diagnostics

2021

View full text Add to dashboard Cite

show abstract

“…Although the cut-off voltage can be pre-set in the protection circuit, overcharge and overdischarge faults still occur in EVs due to the inconsistency among cells, inaccurate condition monitoring, and charging system faults [88]. For example, if the voltages of series cells are not monitored well in BMS, the cells that have the highest and lowest voltages will be overcharged and overdischarged, respectively, resulting in the rapid aging of the battery.…”

Section: Li-ion Battery Fault Mechanismsmentioning

confidence: 99%

“…After recharging, the newly regenerated SEI changes the electrochemical properties of the anode [95], resulting in an increase of resistance and the degradation of capac ity [96]. Repeated overdischarge will accelerate battery capacity degradation, the extent of which depends on the depth of discharge [88]. During overcharging, lithium deposition (mossy or dendritic type) will occur at the surface of the anode [97].…”

Section: Li-ion Battery Fault Mechanismsmentioning

confidence: 99%

Advanced Fault Diagnosis for Lithium-Ion Battery Systems

Hu¹,

Zhang²,

Liu³

et al. 2020

Preprint

View full text Add to dashboard Cite

Lithium-ion batteries have become the mainstream energy storage solution for many applications, such as electric vehicles and smart grids. However, various faults in a lithium-ion battery system (LIBS) can potentially cause performance degradation and severe safety issues. Developing advanced fault diagnosis technologies is becoming increasingly critical for the safe operation of LIBS. This paper provides a comprehensive review of fault mechanisms, fault features, and fault diagnosis of various faults in LIBS, including internal battery faults, sensor faults, and actuator faults. Future trends in the development of fault diagnosis technologies for a safer battery system are presented and discussed. IntroductionAs one of the most promising energy storage systems, lithium-ion batteries have been widely used in various applications, such as electric vehicles (EVs) and smart grids. Currently, lithium-ion batteries have become the mainstream energy storage solution, owing to their inherent benefits such as high energy density, high power density, and long lifespan. However, the potential r isks, due to the abusive operating conditions and harsh environment, pose a huge challenge to the safety of Li-ion battery systems (LIBSs). A real-time effective battery management system (BMS) is critical to ensure the safety of LIBSs. BMS has several functionalities, such as state of charge monitoring, thermal management, charging management, and equalization management. It also tracks the health status and monitors the potential faults of LIBS. Without suitable diagnostics and fault handling, a minor fault could eventually lead to severe damages of LIBS [1]. The importance of the fault diagnostics and fault handling has been demonstrated repeatedly in several severe incidents recently [2]- [4].There are different fault modes in the LIBS, and fault mechanisms are usually very complex. From a control perspective, these fault modes can be divided into battery fault, sensor fault, and actuator fault. The battery faults, which include overcharge , overdischarge, overheat, external short circuit (ESC), internal short circuit (ISC), electrolyte le akage, battery swelling, battery accelerated degradation, and thermal runaway (TR), are the most critical faults in the LIBS. These faults are also intertwine d. Overcharge and overdischarge could lead to various undesirable battery side reactions, resultin g in accelerated degradation. These side reactions and gases generated by the chain reactions during TR may eventually cause the battery swelling. Such a swellin g along with mechanical damage may, in turn, lead to electrolyte leakage. The ISC is typically caused by separator failure due to manufacturing defects, overheat, mechanical collisions, or penetration by metal dendrites or mechanical punctures. Fortunatel y, the Joule heat generated by ISC develops into TR only when the equivalent ISC resistance reac hes a very low level [5]. Abnormal heat generation occurs under various conditions, such as side reactions during overcharge/over -di...

show abstract

“…Zhang and Wu et al [21,22] discovered that the positive electrode of a battery after discharging contained brass. Ye et al [23] observed that the temperature of the negative electrode was always higher than that of the positive electrode during overdischarging; an electrochemical reaction platform in which the Cu current collector was dissolved was observed at 0.5 V, and the overdischarge reduced the SEI film decomposition temperature.…”

Section: Of 14mentioning

confidence: 99%

Effects of Overdischarge Rate on Thermal Runaway of NCM811 Li-Ion Batteries

Wang

Zheng

et al. 2020

Energies

View full text Add to dashboard Cite

Overdischarge often occurs during the use of battery packs, owing to cell inconsistency in the pack. In this study, the overdischarge behavior of 2.9 Ah cylindrical NCM811 [Li(Ni0.8Co0.1Mn0.1)O2] batteries in an adiabatic environment was investigated. A higher overdischarge rate resulted in a faster temperature increase in the batteries. Moreover, the following temperatures increased: Tu, at which the voltage decreased to 0 V; Ti, at which the current decreased to 0 A; and the maximum temperature during the battery overdischarge (Tm). The following times decreased: tu, when the voltage decreased from 3 to 0 V, and ti, when the current decreased to 0 A. The discharge capacity of the batteries was 3.06–3.14 Ah, and the maximum discharge depth of the batteries was 105.51–108.27%. Additionally, the characteristic overdischarge behavior of the batteries in a high-temperature environment (55 °C) was investigated. At high temperatures, the safety during overdischarging decreased, and the amount of energy released during the overdischarge phase and short-circuiting decreased significantly. Shallow overdischarging did not significantly affect the battery capacity recovery. None of the overdischarging cases caused fires, explosions, or thermal runaway in the batteries. The NCM811 batteries achieved good safety performance under overdischarge conditions: hence, they are valuable references for battery safety research.

show abstract

Fault mechanism study on Li‐ion battery at over‐discharge and its diagnosis approach

Cited by 24 publications

References 40 publications

Challenges and needs for system-level electrochemical lithium-ion battery management and diagnostics

Challenges and needs for system-level electrochemical lithium-ion battery management and diagnostics

Advanced Fault Diagnosis for Lithium-Ion Battery Systems

Effects of Overdischarge Rate on Thermal Runaway of NCM811 Li-Ion Batteries

Contact Info

Product

Resources

About