A critical element of a hybrid-electric-vehicle (HEV) propulsion system is the battery management system (BMS), which controls the performance of the HEV battery, the costliest and heaviest component of the propulsion system. This paper examines the relevance and criticality of an HEV BMS as a whole; that is, its general functions and “responsibilities”. Of these, its ability to accurately esti...

In electric vehicles, the battery pack is one of the most important components that strongly influence the system performance. The battery thermal management system (BTMS) is critical to remove the heat generated by the battery pack, which guarantees the appropriate working temperature for the battery pack. Air cooling is one of the most commonly-used solutions among various battery thermal man...

This paper provides a preliminary battery assessment mechanism to address the hypothetical ECO-America EV Challenge. Several battery parameters are discussed in relation to pack needs, in addition to vehicle and environmental considerations. An evaluation method is provided, with a vision based on success and a metric for battery evaluation for the ECO-America Challenge. Five in-house testing p...

This paper has applied battery pack technologies in battery system based on the characteristics of charging and discharging process and composed big battery pack from single battery cells with MSP430 as micro control unit (MCU). The paper has also designed the monitoring hardware system of main control unit, data monitoring module, as well as the monitoring software of upper computer of CAN com...

The battery management system (BMS) is a core component to ensure the efficient and safe operation of electric vehicles, practical evaluation key BMS functions thus great importance. However, testing with actual packs suffers from poor repeatability long status transition time due uncontrollable degradation systems environment variations. In this paper, overcome challenge, we propose an framewo...

Battery-powered wireless sensor networks are prone to premature failures because some nodes deplete their batteries more rapidly than others due to workload variations, the many-to-one traffic pattern, and heterogeneous hardware. Most previous sensor network lifetime enhancement techniques focused on balancing the power distribution, assuming the usage of the identical battery. This paper propo...

Proper electric and thermal management of an HEV battery pack, consisting of many modules of cells, is imperative. During operation, voltage and temperature differences in the modules/cells can lead to electrical imbalances from module to module and decrease pack performance by as much as 25%. An active battery management system (BMS) is a must to monitor, control, and balance the pack. The Uni...

Battery systems are affected by many factors, a key one being the cells unbalancing. Without the balancing system, the individual cell voltages will differ over time, battery pack capacity will decrease quickly. That will result in the failure of the total battery system. Thus cell balancing acts an important role on the battery life preserving. Different cell balancing methodologies have been ...

In this paper, a single-phase multilevel inverter with battery balancing is proposedThe voltage source inverters produce a voltage with levels either 0 or ±V dc they are known as two level inverters.To obtain a quality output voltage or a current waveform with a minimum amount of ripple content, they require high switching frequency along with various pulse width modulation (PWM) strategies.As ...

In this paper the design and the operation of the drive system in a Fuel Cell Electric Vehicle (FCEV) is presented. The system consists of a Proton Exchange Membrane Fuel Cell (PEMFC) stack, an interleaved boost converter, battery pack connected via a bidirectional buck-boost converter and a brushless DC motor (BLDC) driven by a three phase inverter. A basic analysis of each component of the in...