Download Citation | Abnormal self-discharge in lithium-ion batteries | Lithium-ion batteries are expected to serve as a key technology for large-scale energy storage systems (ESSs), which will
Customer ServiceBattery failure primarily occurs due to specific intrinsic factors that result in performance degradation or abnormal operation. Common failures of lithiumion batteries include capacity
Customer ServiceBased on the proposed abnormal aging prognosis model and EOL prediction model, only partial discharge V-Q data of one cycle is needed to accurately detect whether
Customer ServiceBattery fault analyses using new sensors have also been reported. Cai et al. (Cai et al., 2021) used nondispersive infrared (NDIR) CO2 sensor to detect vent-gas and battery fail-ure. An overcharging experiment leading to cell venting was conducted using a prototype gas sensor suite. However, most existing studies focused on vehicle operating conditions and high-energy
Customer ServiceImpact energy is identified as the primary factor governing battery failure, overshadowing the role of impact velocity, though velocity still influences battery behavior. This energy-dominated threshold can serve as a dynamic failure criterion for lithium-ion batteries under impact loading, offering new perspectives on mechanical safety evaluation.
Customer ServiceAbnormalities in individual lithium-ion batteries can cause the entire battery pack to fail, thereby the operation of electric vehicles is affected and safety accidents even occur in severe cases. Therefore, timely and accurate
Customer ServiceBattery TR, an irreversible disaster-causing failure mode, occurs when a battery experiences a specific type of abuse [10,11]. Mechanical abuse (chassis deformation and foreign body infiltration
Customer ServiceThe invention and widespread use of lithium-ion batteries have played a pivotal role in advancing electric vehicle technology on a global scale. 1, 2 Nonetheless, the safety concerns associated with lithium-ion batteries, particularly in electric vehicles, cannot be overlooked, as they can undergo thermal runaway under extreme conditions. 3 Among the
Customer ServiceThe battery system, as the core energy storage device of new energy vehicles, faces increasing safety issues and threats. An accurate and robust fault diagnosis technique is crucial to guarantee the safe, reliable, and robust operation of lithium-ion batteries. However, in battery systems, various faults are difficult to diagnose and isolate due to their similar features
Customer ServiceAbnormal failure of the pin fin heat sink for new energy vehicle was comprehensively analysed. Four kinds of typical manufacturing defects were systematically characterized and discussed. Causes of defects were all determined and corresponding countermeasures were proposed.
Customer ServiceBased on the data of the internet of vehicles platform, this paper proposes an improved isolated forest power battery abnormal monomer identification and early warning method, which uses the sliding window (SW)
Customer ServiceThe aim of this paper is to analyze the potential reasons for the safety failure of batteries for new-energy vehicles. Firstly, the importance and popularization of new energy
Customer ServiceLithium-ion batteries are expected to serve as a key technology for large-scale energy storage systems (ESSs), which will help satisfy recent increasing demands for renewable energy utilization. Besides their promising electrochemical performance, the low self-discharge rate (<5% of the stored capacity over 1 month) of lithium-ion batteries is one of their most
Customer ServiceThe first layer strategy is like the threshold-based fault detection method, if the battery voltage is lower than the discharge cut-off voltage, the battery is considered to have an over discharge fault. Otherwise, the battery data is fed into the eXtreme Gradient Boosting (XGBoost) algorithm [108].
Customer ServiceA new pathway to self-discharge leading to battery degradation. While the inner workings are more complicated, batteries basically convert electrochemical energy directly to electrical energy. Batteries consist of an anode, electrolyte, separator and cathode. The electrolyte transfers ions, or charge-carrying particles, between the cathode and anode that
Customer ServiceTaking lead-acid batteries as an example, this paper analyzes the discharge characteristics of new energy batteries, points out the direction for battery product design optimization,
Customer ServiceThrough we had carried out cycle experiments of 100 % SOC charge and 120 % SOC over-discharge at the different rate for our lithium-ion battery, we found that apparent charge and discharge failure of the battery always occurred in the charge process of over-discharged in which the batteries go along with rapid temperature rising, sudden changing of the internal
Customer ServiceLithium-ion batteries are expected to serve as a key technology for large-scale energy storage systems (ESSs), which will help satisfy recent increasing demands for renewable energy utilization. Besides their promising
Customer ServiceAs one of the most popular energy storage devices, lithium-ion batteries have dominated the consumer electronics market and electric vehicles on account of high energy density and long lifespan [[1], [2], [3]].The safety, durability, and reliable operation of battery systems attract more attention [4] pared with normal batteries, abnormal degradation
Customer ServiceOwing to their characteristics like long life, high energy density, and high power density, lithium (Li)–iron–phosphate batteries have been widely used in energy-storage power stations [1, 2].However, safety problems have arisen as the industry pursues higher energy densities in Li-ion batteries [3].The public has become increasingly anxious about the safety of
Customer ServiceThe over-discharge can significantly degrade a lithium-ion (Li-ion) batterys lifetime. Therefore, it is important to detect the over-discharge and prevent severe damage of the Li-ion battery.
Customer ServiceDuring the process of discharge, the stored Li-ions move back from anode to cathode. In both processes, Li-ions are extracted from and stored in host materials and this process of ion insertion from one electrode to another is termed intercalation. Every component used will contribute towards battery performance and safety, and finding out the best possible combination will
Customer ServiceLithium-ion batteries (LIBs) are susceptible to mechanical failures that can occur at various scales, including particle, electrode and overall cell levels. These failures are influenced by a combination of multi-physical fields of electrochemical, mechanical and thermal factors, making them complex and multi-physical in nature. The consequences of these
Customer ServiceLithium-ion batteries are expected to serve as a key technology for large-scale energy storage systems (ESSs), which will help satisfy recent increasing demands for renewable energy utilization. Besides their promising electrochemical performance, the low self-discharge rate (<5% of the stored capacity over 1 month) of lithium-ion batteries is one of their most
Customer ServiceThe aim of this paper is to analyze the potential reasons for the safety failure of batteries for new-energy vehicles. Firstly, the importance and popularization of new energy batteries are introduced, and the importance of safety failure issues is drawn out. Then, the composition and working principle of the battery is explained in detail, which provides the basis
Customer ServiceCompared to new batteries, the aged batteries tested did not exhibit more harmful failure reactions. Therefore, during the −5 ℃ cycle aging process, either no lithium plating occurred or lithium plating reactions occurred during the storage period between aging and thermal runaway experiments. The batteries were stored at 25 ℃ for three months before
Customer ServiceHerein, contrary to conventional belief, we report that the self-discharge of LIBs can be abnormally accelerated when the battery has been exposed even to a routine short
Customer ServiceThe global shift towards renewable energy sources has heightened interest in energy storage technologies, particularly lithium-ion batteries (LIBs). Boasting high energy density, low self
Customer ServiceBy examining an actual case of TR in new energy vehicles, Gao et al. [93] examined the battery''s TR progression, pinpointing crucial time nodes within the runaway event, such as abnormal starting points in temperature and voltage. The study postulates that TR is caused by battery overcharge and ISC. Furthermore, the research scrutinizes anomalous cell
Customer Servicedischarge.1–5 An LIB may experience overcharge or over-discharge when it is used in a battery pack because of the capacity variation of different batteries in the pack and the difficulty in maintaining identical SOC of every single battery. The battery in the pack will inevitably experience overcharge or over-discharge to a certain degree
Customer ServiceThrough comprehensive analysis of operation data of the battery pack in E-scooters, we use the statistical technology to analyze the distribution characteristics of each parameter in battery packs and design the abnormal state detection coefficients. For the systemic fault diagnosis, by incorporating a data visualization technique, the proposed algorithm can
Customer ServiceThey constitute a promising solution to a set of global challenges such as climate change and air pollution. 2 Developing new energy vehicles has been a global consensus, and developing new energy vehicles with pure electric characteristics has become China''s national strategy. 3 Due to its advantages of high energy density, low self-discharge rate, high cycle
Customer ServiceHere, we propose an over-discharge strategy to understand the mechanism of heat generation and battery failure. 36 Ah pouch-type battery is charged at 1C (36 A) current density, and is discharged for 1.5 h at 1C (36 A) with 0.5 h over-discharge degree. The battery was disassembled and analyzed by X-ray diffraction (XRD), Raman test, scanning electron
Customer ServiceHerein, contrary to conventional belief, we report that the self-discharge of LIBs can be abnormally accelerated when the battery had been exposed even to a routine short
Customer ServiceLithium-ion battery energy storage systems have achieved rapid development and are a key part of the achievement of renewable energy transition and the 2030 "Carbon Peak" strategy of China. However, due to the complexity of this electrochemical equipment, the large-scale use of lithium-ion batteries brings severe challenges to the safety of the energy storage
Customer ServiceIn this paper, the state-of-the-art battery fault diagnosis methods are comprehensively reviewed. First, the degradation and fault mechanisms are analyzed and
Customer ServiceCompared with normal batteries, abnormal degradation batteries reach the discharge cut-off voltage faster under the same charge/discharge conditions, which may induce power failure of battery systems. Therefore, it is critical to diagnose potential failure of batteries to ensure the safety of lithium-ion battery systems throughout the entire lifespan [[5], [6], [7]].
Customer ServiceHowever, the working environment of EVs is complex and variable, and the factors leading to LiB failure are complicated.According to the information of the National Big Data Alliance of New Energy Vehicles, batteries are one of the main causes of EVs failures, causing more than 50% of fires .
The causes of LiB failure are multidimensional, multi-causal, and multi-layered which can be congenital, such as defects in the battery, differences in the cells within the pack, or can be related to the cyclical aging of the battery and abuse in use.
Therefore, this study first analyses the possible failures and their mechanisms during the battery's full life cycle, including not only failures caused by abuse, but also failures caused by abuse and failures that may occur during production defects, normal use and aging.
This is due to the fact that LiB combustion will produce a large amount of heat and gas which rapidly raises the pressure inside the battery shell, the explosion will happen when the pressure increases to the level exceeding the discharge capacity of the safe valve.
Subsequently, the battery rapidly generates heat, which in turn will trigger reactions between the battery components, trigger more side reactions and cause thermal runaway with the electrolyte and electrode ejecting from the safety valve and penetration site, forming a jet flame. EV collision mostly leads to deformation and fracture of a battery.
Due to the existence of the coupled and complicated side reactions throughout the entire battery service life, battery would endure continuous performance degradation such as capacity fade and internal resistance increase. Furthermore, manufacturing defects and maloperations may lead to accelerated aging.
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