Lithium-ion battery, as the power source for electric vehicles (EVs), has hitherto been a dominating choice of the industry, which can be largely attributed to the high efficiency and high energy density of the battery [1], [2], [3], [4].However, the somewhat frequent unfortunate incidents of EVs reported over the recent years, as caused by lithium-ion battery faults, have …
Furthermore, the arrangement of lithium-ion battery packs in parallel modular architecture dramatically increases the complexity of the controller as well as the cost of implementation. An adequately engineered parallel modular battery pack system can improve overall reliability and safety. This paper uses a voltage-controlled bidirectional ...
The Li-ion battery pack is made up of cells that are connected in series and parallel to meet the voltage and power requirements of the EV system. Due to manufacturing …
Safety risk evaluation of battery pack. To evaluate the safety risk of the battery pack, the critical ambient temperature and operating power need to be coupled for thermal safety analysis. Based on the randomness and distribution types of parameters in Table 2, the Monte Carlo method is used for combined sampling.
Uneven electrical current distribution in a parallel-connected lithium-ion battery pack can result in different degradation rates and overcurrent issues in the cells. Understanding the electrical current dynamics can enhance configuration design and battery management of parallel connections. This paper presents an experimental investigation of the current distribution for …
Mechanical phenomena play an important role when it comes to battery module operation and safety requirements. During operation battery modules are exposed to dynamic loading and random vibrations, which may cause short circuits and fire (Shui et al., 2018).Random vibrations have a particularly high influence on modules with a large number of single cells due …
Here we present experimental and modeling results demonstrating that, when lithium ion cells are connected in parallel and cycled at high rate, matching of internal resistance is important …
cylindrical cells are chosen. 20 battery cells are connected in parallel to form a battery submodule, and 13 battery submodules are connected in series to form a battery pack. The battery pack design process mainly includes positioning and connection of battery cells, heat dissipation mechanism, cabling and inside the pack. The above ...
Recently, the need for thermal management of lithium-ion batteries in electrical transportation engineering has received increased attention. To get maximum performance from lithium-ion batteries, battery thermal management systems are required. This paper quantitatively presents the effects of several factors on both maximum battery …
connected battery pack are simulated and studied using the battery pack simulation model. The effectof Ohmic resistance differentialon the current and SOC (state of charge) of the parallel-connected battery pack, as well as the effectof an aging cell on series−parallel battery pack performance, are investigated. The group optimization idea of ...
For example, "Battery Pack, lithium-ion battery, Electric Vehicle, Vibration, temperature, Battery degradation, aging, optimization, battery design and thermal loads." As a result, more than 250 journal papers were listed, and then filtered by reading the title, abstract and conclusions, after that, the more relevant papers for the research were completely read for the …
Battery abuse faults include, in the main, over-charging, over-discharging, external short circuits, and internal short circuits (ISCs). Among them, the ISC is one of the most common causes of thermal runaway in lithium-ion batteries, typically triggered by various abusive conditions during operation [8], [9].Mechanical abuse, such as collision, extrusion, or …
Effect of parallel connection on 18650-type lithium ion battery thermal runaway propagation and active cooling prevention with water mist . Appl. Therm. Eng., 184 (2021) Google Scholar [66] S.T. Plunkett, et al. Enhancing thermal safety in lithium-ion battery packs through parallel cell ''current dumping'' mitigation. Appl. Energy, 286 (2021) Google Scholar [67] Z. An, …
Large-format Lithium-ion battery packs consist of the series and parallel connection of elemental cells, usually assembled into modules. The required voltage and capacity of the battery pack …
Here we present an experimental study of surface cooled parallel-string battery packs (temperature range 20–45°C), and identify two main opera-tional modes; convergent …
The safety issue of lithium-ion battery packs has become a major threat for battery application and directly affects the driving safety of electric vehicles. In parallel battery pack, connection fault is hard to be detected through the parameters directly measured by the battery management system (BMS), which will lead to serious damage such as accelerated …
In order to meet the energy and power requirements of large-scale battery applications, lithium-ion cells have to be electrically connected by various serial-parallel connection topologies to form battery pack. However, due to the cell-to-cell parameters variations, different connection topologies lead to different performance of the battery pack.
For a parallel-connected battery pack, the negative feedback formed by the coupling of parameters between individual cells can keep the current stable before the end of charge and discharge. However, the current …
The promotion of electric vehicles (EVs) is important for energy conversion and traffic electrification, and the amelioration of fossil energy exhaustion and greenhouse gas emissions [1].Lithium-ion batteries, used in EVs, have the advantages of cleanliness, high energy density, and low self-discharge rate [2].The battery pack for EVs usually contains …
Li et al. (2021b) established a complete battery pack model by combining the cell model, battery pack cooling model, and battery pack balance management model. In addition, a fast charging strategy based on the shortest charging time was proposed. The results showed that the fast charging strategy could significantly shorten the charging time but would …
This paper proposes a novel method to diagnose connection faults in parallel-connected battery packs by estimating the current distribution through terminal voltage, total …
Effect of parallel connection on 18650-type lithium ion battery thermal runaway propagation and active cooling prevention with water mist Author links open overlay panel Tong Liu a, Jian Hu a, Changfa Tao b, Xiaolong Zhu a, Xishi Wang a
Handbook On Lithium Battery Pack Design 1 ... single cell or multiple cells connected in a series or parallel configurations. Batteries are categorized as being either primary or secondary systems. For instance, primary batteries are commonly known as disposable batteries and are not engineered for recharging (doing so may result in an explosion). Conversely, secondary …
This paper studies the characteristics of battery packs with parallel-connected lithium-ion battery cells. To investigate the influence of cell inconsistency pr.
As the key component of EVs, the battery system consists of several LiB packs, and each LiB pack has hundreds or thousands of cells, sensors, and connection resistances, which are monitored and controlled by a battery management system (BMS). However, safety accidents caused by LiB pack faults have frequently occurred, leading to public concerns …
The operation safety of battery systems is one of the main issues hindering application and market penetration of E-scooters and EVs. In addition to the built-in fault diagnosis system in BMS of battery packs, a real-time management platform that can monitor battery operation and provide decision-making reference for end-users and manufacturers is also a …
For the first time, the engineered fuse nail penetration tests conclusively demonstrated the ability to prevent current dumping in lithium-ion battery packs. To achieve this safety capability, comprehensive understanding of the trigger cell short-circuit resistance, along with the internal resistance of the neighboring cells was necessary.
This study numerically investigates a 4P6S battery module with two connection topologies: 1) a straight connection topology, where the sub-modules consist of parallel-connected cells that are ...
Most of us know the basics of building packs of lithium-ion batteries. We''re familiar with cell balancing and the need for protection circuitry, and we understand the intricacies of the vario…
Internal short circuit is one of the unsolved safety problems that may trigger the thermal runaway of lithium-ion batteries. This paper aims to detect the internal short circuit that occurs in battery pack with parallel-series hybrid connections based on the symmetrical loop circuit topology. The theory of the symmetrical loop circuit topology ...
Multi-fault diagnosis for series-connected lithium-ion battery pack with reconstruction-based contribution based on parallel PCA-KPCA Mina Ma a, Xiaoyu Li b, Wei Gao c, Jinhua Sun d, Qingsong Wang d, Chris Mi c, * a School of Safety Engineering and Emergency Management, Shijiazhuang Tiedao University, 050043, China b Tianjin Key Laboratory of Power …
Propagation of Lithium-ion battery pack thermal runaway is a major safety concern for battery manufacturers and consumers. The comprehensive cell current …
1 Shandong University of Science and Technology, Qingdao, China; 2 School of Control Science and Engineering, Shandong University, Jinan, China; 3 Dalian University of Technology, Panjin, China; In order to meet the energy and power requirements of large-scale battery applications, lithium-ion batteries have to be connected in series and parallel to form …
The connection faults between the cells of a battery pack can increase contact resistance and thus result in abnormal heating at the connections, which can seriously damage or even fail the battery pack. This work therefore proposes a novel connection fault diagnosis method based on mechanical vibration signals rather than voltage and current measurements. …
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