This requires careful thermal management, which can be achieved through a combination of conduction and convection circuits. In this paper, a 1D-3D simulation study has been performed on a 12V 4s-4p pack by varying the thickness of HV busbars and temperature localization effects and temperature uniformity has been observed. The holder has 16 ...
And adaptive thresholds are set for the detection and localization of faulty cells. To the best of our knowledge, the discrete Fréchet algorithm is presented for the first time in the field of faulty detection of battery packs. The remainder of this paper is organized as follows.
By analyzing the abnormalities hidden beneath the external measurement and calcg. the fault frequency of each cell in pack, the proposed algorithm can identify the faulty type and locate the faulty cell in a timely manner. Exptl. results validate that the proposed method can accurately diagnose faults and monitor the status of battery packs.
The notion behind evaluation of natural frequencies of battery pack enclosure is to check if these are in the range of 7–200 Hz, which is in the range of vibration frequencies of electric vehicle during its normal operation. The purpose is to maximize the minimum natural frequency observed in each of the case.
Finally, to achieve automatic fault detection and localization, the discrete Fréchet algorithm is proposed, and the extracted new features are used as the input to the algorithm. And adaptive thresholds are set for the detection and localization of faulty cells.
Battery management system is used to measure arc signals, fuse multidimensional arc information, and identify arc processes in battery systems. However, the arc detection and warning technology has high requirements for the sampling accuracy and calculation speed of the battery management system.
A protection scheme was devised by considering the voltage levels of the cell, module, and pack, as well as considering the voltage resistance of the battery at different locations, the insulation material used to isolate the arc, the gap width inside the pack, and the effective battery series and parallel connection method.
This requires careful thermal management, which can be achieved through a combination of conduction and convection circuits. In this paper, a 1D-3D simulation study has been performed on a 12V 4s-4p pack by varying the thickness of HV busbars and temperature localization effects and temperature uniformity has been observed. The holder has 16 ...
According to the simulation results about the localized abnormal high-rate discharge events of the battery pack, it was discovered that the abnormal cell had minimal impact on the surrounding batteries with the coolant flow rate of 0.6 L/min, and the temperatures of the surrounding batteries were maintained within the optimal temperature range ...
According to the simulation results about the localized abnormal high-rate …
In this paper, based on the analysis and comparison of various equalization topologies, an active equalization topology based on flyback transformer is proposed, and the SOC (state of charge) of lithium-ion battery is used as the equalization variable to formulate the corresponding equalization strategy. Finally, the effectiveness of the ...
In this paper, an initial microfault diagnosis method is proposed for the data of electric vehicles in actual operation. First, a robust locally weighted regression data smoothing method is proposed that can effectively remove noisy data and retain fault characteristics.
This research article proposes a synthetic methodology for an advanced design of battery pack and its components by incorporating optimal scenario of materials selection for battery electrodes, SOH estimation, configurations (assembly) of cells, thermal (air and liquid cooling) design, battery pack casing mechanical safety, and recycling aspects...
This research article proposes a synthetic methodology for an advanced design of battery pack …
Thermal fault diagnostics specific to large format pouch or prismatic batteries have been …
Such inconsistency is unavoidable and constitutes the initial imbalance throughout the battery pack. On the other hand, external factors arising from the different cooling potential of each cell, localization of cells in the battery pack and, charge/discharge current lead to variations on temperature and depth of discharge (DOD) [10, 11].
As shown in Figure 11(a), the figure identifies 1 is the drive power module, mainly used for charging each battery in the battery pack; 2 for the electronic load module, model N3305A0 DC electronic load on lithium batteries for constant current discharge operation, input current range of 0–60 A, voltage range of 0–150 V, measurement accuracy of 0.02%; 3 for the …
Usually, the capacity of a single battery is small, so it is often used in series/parallel to form a battery pack to improve the power supply capacity. In this case, with the use of the battery, the performance of each battery will gradually become inconsistent, resulting in an imbalance of the battery''s power, which will cause overshoot or overdischarge of the single …
The abnormality detection and localization of battery systems are receiving …
To verify the effectiveness of the proposed method, the battery pack of 96 …
Three-dimensional electrochemical-magnetic-thermal coupling model for lithium-ion batteries and its application in battery health monitoring and fault diagnosis
In this paper, an initial microfault diagnosis method is proposed for the data …
In this paper, based on the analysis and comparison of various equalization topologies, an …
In this study, a design optimization methodology is proposed to optimize the …
Abstract: Due to the monomers difference caused during the production process, the inconsistencies of Lithium batteries in remaining capacity can affect the service life of battery packs and cause damage or even explosions. A new mod-ulnar equalization circuit, composed of improved DC-DC converters with the adaptive equalization control strategy based on ant coloy …
Internal short circuit (ISC) is a serious safety hazard for lithium-ion battery …
In this study, a design optimization methodology is proposed to optimize the features of mechanical design (e.g. minimization of mass, maximization of minimum natural frequency and minimization of maximum deformation) of the battery pack enclosure. The proposed methodology is comprised of four phases.
To verify the effectiveness of the proposed method, the battery pack of 96 series-connected cells evenly distributed in ten modules is designed in MATLAB/Simulink software for both charging and...
Summary The multi-mode-adaptive estimation (MMAE) algorithm lacks the noise suppression capability as impacted by the isolation of each model, which reduces the accuracy of fault diagnosis and caus...
Li, M., Tang, Z., Rao, W. et al. Research on optimization algorithms for localization and capacity determination of chargers considering the spatiotemporal distribution of electric vehicles.
The abnormality detection and localization of battery systems are receiving more and more attention. In this article, the spatiotemporal entropy is proposed to detect and locate thermal abnormalities of LIB packs. Based on the Karhunen–Loève (KL) decomposition, the spatial entropy and temporal entropy can be constructed from ...
Internal short circuit (ISC) is a serious safety hazard for lithium-ion battery packs. How to comprehensively detect and evaluate ISC in battery packs remains a challenging problem. Motivated by this, this paper proposes an ISC detection method based on the transformation matrix and an ISC resistance calculation method based on an improved ...
Thermal fault diagnostics specific to large format pouch or prismatic batteries have been under-explored. There are a few works in the area of fault detection and localization in battery packs. Authors in [23] monitor the wire harnesses in battery pack to obtain thermal hot-spots and localize faults based on the change in thermal ...
For a battery pack composed of n cells, the topology in [20] requires 4 windings, the topology in [21] requires n + 1 windings, and the topology in [22] requires 2n windings. Moreover, transformer spike voltage and magnetic leakage phenomena should not be neglected. Based on the feature that the equalization energy transfer process of inductive energy storage …
This review provides a comprehensive overview of the current research status on DC arc faults in battery systems. However, its primary focus lies in examining arc mechanisms, detection, early warning, and protection within battery systems. The study of arc mechanisms encompasses various aspects, including arc composition, classification, and ...
This review provides a comprehensive overview of the current research …
Structure, improve circuit switch network structure, reduce the number of switches and capacitors in the circuit, simplify the equalization structure, combined with the advantages of bidirectional DC-DC converters can be used in both directions, according to the difference between the average voltage of the battery pack and the voltage of each cell. Any …
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