Does a series-connected lithium-ion battery pack have a fault?
In this study, small-scale fault experiments that consider the inconsistency among cells, virtual connection fault, and external short circuits of the series-connected lithium-ion battery pack are carried out under laboratory conditions to verify the proposed method.
Who is Guangdong matrix New Energy Group?
Guangdong Matrix New Energy Group Co., Ltd. is a national high-tech enterprise whose main business is the R&D, design, production and sales of lithium battery packs. It is a leading provider of lithium battery solutions and PACKs in China and is committed to serving customers with safe, environment- friendly and durable lithium batteries.
What is a multi-fault diagnostic strategy for series-connected lithium-ion battery pack?
A multi-fault diagnostic strategy for the series-connected lithium-ion battery pack is proposed. The contribution-based PCA is adopted to detect the fault of the battery. The reconstruction-based parallel PCA-KPCA is used to estimate the fault waveform. Inconsistency, connection fault, and external short circuit are comprehensively diagnosed.
What are lithium-polymer (LiPo) battery management systems?
Abstract – Battery Management Systems are the key modules for Lithium-Polymer (LiPo) batteries.
Why are lithium-ion batteries used in EVs?
Lithium-ion batteries are widely used in EVs owing to the advantages of high energy and power density, long lifespan, low self-discharging, and environmental benefits , , . However, the safety issue of the battery system has restricted the rapid penetration of EVs.
How many cells are in a battery pack?
The battery pack with eight cells in series is conducted DST cycle at room temperature. The recorded terminal voltage considers the connection resistance of cell-to-cell. In the schematic diagram, the resistors, R1,2, R2,3, …, R6,7, R7,8, are used to represent the connection resistance between cells.
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SOC Estimation of Lithium-Ion Battery Pack Considering Balancing ...
SOC Estimation of Lithium-Ion Battery Pack Considering Balancing Current Abstract: The state-of-charge (SOC) estimation approaches based on the pack model can hardly provide precise estimation due to cell difference, while the approaches based on each cell cost high computation resource, which are not suitable for real-time application. The ...
Get Price →Design of a Battery Management System based on …
To improve the reliability and capacity of Li-Po battery pack, this paper propose a novel battery management system, on which, individual battery cell can be dynamically …
Get Price →A novel matrix-vector-based framework for modeling and simulation …
The matrix-vector-based structure of the model framework allows a real-time simulation of the battery pack on a regular mobile processor with a frequency of 100Hz. ... B.J. Yurkovich, S. Yurkovich, Modeling and experimental validation of series connected battery pack modules: Kohala coast, hawai''i, august 27-30, 2017 : Ccta 2017, 2017, 859 ...
Get Price →Switch Matrix Algorithm for Series Lithium Battery Pack …
ResearchArticle Switch Matrix Algorithm for Series Lithium Battery Pack Equilibrium Based on Derived Acceleration Information Gauss-Seidel YewenWei,1,2 ShuailongDai,1,2 …
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Get Price →A double-layer ring-structured equalizer for series-connected lithium ...
According to the energy dissipation form, the battery equalization can be divided into two categories: passive equalization and active equalization [8, 14].Passive equalization consumes the excess energy from the battery pack by resistors [9].The shunting resistor equalizer has a simple circuit and low cost, but the slow equalization speed and serious heating become …
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Get Price →A Framework for Analysis of Lithium-Ion Battery Pack …
A Framework for Analysis of Lithium-Ion Battery Pack Balancing Including Cell Parameter Heterogeneity ... is utilized. As this is a lower triangular matrix, the diagonal entries are the time-varying poles. ... Y.S. and Cheng, M.W. (2005) “Intelligent control battery equalization for series connected lithium-ion battery strings,†IEEE ...
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Get Price →Internal short circuit detection for lithium-ion battery pack …
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 answers the question that: …
Get Price →Design of a Battery Management System based on matrix …
Battery Management Systems are the key modules for Lithium-Polymer (LiPo) batteries. They control the charging /discharging parameters, measure the voltages and state of charge (SOC) of the battery cells, equalize the charge/discharge characterizes of individual battery cells and notify the main controller of the status of the battery pack. They are also the …
Get Price →Impact of Individual Cell Parameter Difference on the …
Lithium-ion power batteries are used in groups of series–parallel configurations. There are Ohmic resistance discrepancies, capacity disparities, and polarization differences between individual cells during discharge, preventing a single cell from reaching the lower limit of the terminal voltage simultaneously, resulting in low capacity and energy utilization. The effect …
Get Price →Design of a Battery Management System based on …
the series are still sufficient to power the system, the battery pack cannot be used either. This will limit the capacity and efficiency of the battery pack. To improve the reliability and capacity of Li-Po battery pack, this paper propose a novel battery management system, on which, individual battery cell can be dynamically connected to or
Get Price →Switch Matrix Algorithm for Series Lithium Battery Pack …
To reduce the influence of the inconsistency of the individual cells in the battery pack, a switch array DC equalization circuit together with an acceleration information Gauss …
Get Price →Design of novel thermal management system for Li-ion battery …
In an EV, the cost of a battery pack is approximately 50–60 % of the total cost of the vehicle. Hence, the customer expects a battery pack which is safe, low cost and can provide longer service life. Li-ion cells are greatly affected by its operating temperature and the power demand (rapid charge/discharge cycle) [6].
Get Price →Battery Pack Cell Balancing
This example shows how to implement a passive cell balancing for a Lithium-ion battery pack. Cell-to-cell differences in the module create imbalance in cell state of charge and hence voltages. ... T points, specified as a matrix. Terminal resistance, R0 - Cell ohmic resistance values at different Vector of state of charge values, SOC and Vector ...
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Get Price →Overview of cell balancing methods for Li‐ion battery …
To increase the lifetime of the battery pack, the battery cells should be frequently equalized to keeps up the difference between the cells as small as possible. There are different techniques of cell balancing have been presented for the battery pack. It is classified as passive and active cell balancing methods based on cell voltage and state ...
Get Price →Machine learning based battery pack health prediction using …
Lithium-ion batteries (LIBs) have become indispensable components in portable electronic devices, electric vehicles (EVs), and grid-scale energy storage systems, owing to their prolonged cycle life, high energy density, and rapid charging capabilities [1] real-world applications, several hundred LIB cells are connected in series or parallel to form a battery …
Get Price →Multi-fault diagnosis for series-connected lithium-ion battery pack ...
We presented a novel multi-fault diagnosis method for a series-connected lithium-ion battery pack with a reconstruction-based contribution based on parallel PCA-KPCA. The …
Get Price →Series‐connected battery equalization system: A systematic …
Series-connected lithium battery packs are widely adopted in industries such as electrical vehicles and large-scale energy storage systems. It is necessary to configure an equalization system for them to reduce the inconsistency of single cells, to ensure the battery pack cycle capacity.
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