With the proliferation of Li-ion batteries in smart phones, safety is the main concern and an on-line detection of battery faults is much wanting. Internal short circuit is a very critical issue ...
Battery protection unit The battery protection circuit disconnects the battery from the load when a critical condition is observed, such as short circuit, undercharge, overcharge or overheating. Additionally, the battery protection circuit manages current rushing into and out of the battery, such as during pre-charge or hotswap turn on. BMS IC ...
The effective fault diagnosis method is a key measure to enhance the safety of lithium-ion batteries (LIBs). Nevertheless, it is challenging for conventional threshold diagnosis methods to detect minor faults in the early stages. Herein, an incipient multi-fault diagnosis method based on data-driven with incremental-scale is proposed. …
In this paper, a novel broken line detection circuit for multi-cells Li-ion battery protection ICs is proposed, which can reliably detect broken lines in a wide cell voltage range. The …
Based on this theory, the energy consumption and capacity of a lithium battery can be optimized by adjusting the charging current, thereby increasing the efficiency and capacity of the battery pack. A corresponding optimization method is proposed in this paper to solve the excessive energy consumption and capacity squeeze of the lithium ...
In order to suppress leakage current caused in the traditional multi-cells series Li-ion battery pack protection system, a new battery voltage transfer method is presented in …
A novel voltage protection method for three-cell lithium-ion battery protection IC (Integrated Circuit) is proposed in this paper. A new voltage protection …
Abstract: The effective fault diagnosis method is a key measure to enhance the safety of lithium-ion batteries (LIBs). Nevertheless, it is challenging for …
battery pack. Therefore, the broken line detection is essential to Li-ion battery protection ICs. In addition, the low power consumption of the protection IC is another important factor to be considered. A typical method discussed in literature [19, 20] has certain ability to achieve broken line detection, but the power dissipation is larger
Aging diagnosis of batteries is essential to ensure that the energy storage systems operate within a safe region. This paper proposes a novel cell to pack health and lifetime prognostics method based on the combination of transferred deep learning and Gaussian process regression. General health indicators are extracted from the partial …
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 …
1. Introduction. 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 …
The high-precision lithium ion battery management system (BMS) is proposed to solve the charging and discharging protection problem of multiple lithium batteries. In order to …
In this article, two cell balancing objectives, including balancing time reduction and cells'' temperature rise suppression, are taken into consideration simultaneously. Furthermore, …
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 …
Lithium batteries have been widely used in portable electronic devices and other electric products. To ensure safety and long life, a lithium battery needs to be equipped with a protection chip. A novel voltage protection method for three-cell lithium-ion battery protection IC (Integrated Circuit) is proposed in this paper. A new voltage …
Electrochemical impedance spectroscopy (EIS) is a measurement method widely used for non-destructive analysis and diagnostics in various electrochemical fields. From the measured dependence of the battery impedance on the frequency, it is possible to determine the parameters of various equivalent electrical circuit models of the battery. …
The controller discharges the battery pack until the current SOC of most-depleted cell (SOC min) reaches to 30%. Similarly, the controller charges the battery pack until the SOC max reaches greater than 99% (~100%). Two flags CH and DC are used to determine whether balancing need to be performed in charging period or in discharging …
Lithium Ion Battery Management and Protection ...
The mileage and performance of an Electric Vehicle depends on the capacity and efficiency of its Battery Pack. To maintain the battery pack in full health is the responsibility of the Battery Management System (BMS). A BMS is a sophisticated unit in an EV which does a lot of activity like monitoring the cells, balancing them and even …
Studying the uncertainty propagation starting from the calendering process to the battery pack inconsistency is a high nonlinear problem involving multi-level and multi-physics fields as shown in Fig. 1.The multi-level physics coupling model contains the calendering process model, electrode microstructure model, electrochemical-thermal …
Sensor fault detection and isolation for a lithium-ion battery pack in electric vehicles ... The UDDS cycle that is a velocity profile [30], was translated and scaled into a current profile for the battery pack experiments. Before loading the UDDS profile, the SoC of each cell is balanced to 90% to ensure each cell has the same initial states ...
Limited by the "weakest cell", the maximum available capacity of battery pack without equalization in Case 1 and Case 2 are only about 642mAh and 588mAh, respectively. With the designed equalization strategy, the maximum available capacity of battery pack in those two cases can be further improved 10.29% and 10.25%, …
This study focuses on a charging strategy for battery packs, as battery pack charge control is crucial for battery management system. First, a single-battery model based on electrothermal aging coupling is proposed; subsequently, a battery pack cooling model and battery pack equilibrium management model are combined to form a …
Safety and life are two pivotal pain points facing the development of current battery technology. This section will primarily focus on intelligent battery management related to battery safety and life based on multi-dimensional sensing and artificial intelligence, as shown in Fig. 10. Download: Download high-res image (452KB)