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Competition in the aircraft industry market and global warming has driven the industry to think along economic and environmental lines. This has resulted in the emergence of more electric aircraft (MEA). The increase in the power demand of aircraft, especially in the last two decades, coupled with advancement in battery materials and technology has led to the development of many high energy density...
Li-Ion batteries are suitable rechargeable choices for electric and hybrid electric vehicle (EV/HEV) applications due to their relatively high level of energy and power density. Development of an efficient method for monitoring their online state-of-charge (SOC) and state-of-health (SOH) is of high importance for vehicular applications. The methods used for SOH estimation are mostly based on discharge...
Plug-In Hybrid Electric Vehicles (PHEVs) are a promising mid-term solution to reduce the energy demand in the personal transportation sector, due to their ability of storing energy in the battery through direct connection to the electrical grid. However, an important aspect to a successful market acceptability for these vehicles is related to the reliability of the energy storage system. In this scenario,...
In this paper, we adopt the Taxes IC BQ2954 to design a switching type battery charger that is very light, high efficiency, and very fast. The charger is able to fully charge a 36V/5.6AH Li-ion battery within 30 minutes.
Battery management system (BMS) is an integral part of the electric vehicle (EV) and the hybrid electric vehicle (HEV).The BMS performs the tasks by integrating one or more of the functions, such as sampling the voltages of the battery cells and the temperatures in the battery module, sampling the voltage of the battery, sampling the current of the battery, as well as cells balancing and determining...
This paper studies the optimal sizing and the experimental verification of a vehicle-used hybrid energy storage system (HESS). To determine the optimized combination that maximizes the traveling distance at an FTP driving pattern, an exhaustive search method was employed. Under constraints of cost, vehicle acceleration, and HESS gross weight, the optimal sizing can be derived. Next, for the purpose...
This article highlights the Nanchang University, Chang-Da on the 1st series and parallel using a group of 3.3V Li-ion battery boxes made of 288V, to a three-phase brushless DC motor to drive, and by TMS320LF2407A DSP to control the PWM output, and then adopted by the IGBT device composed of three-phase full-bridge circuit to drive the brushless DC motor speed, thus ensuring the motor speed control...
For verifying the strategy of the vehicle control unit(VCU), a real-time simulation environment needs to be established in advance. It is modified from our in-house simulator for the electric vehicle (EV) based on the hardware in-the-loop(HIL) structure and constrained by several communication devices, e.g. CAN bus, AI/O, DI/O, etc.. A dual energy storage system (DESS) has been modeled in this simulator...
Lithium-ion batteries exhibit high levels of energy and power density among electrochemical batteries. This attribute makes them suitable for being selected as the energy storage system in electric, hybrid electric vehicle, and plug-in vehicles (EV/HEV/PHEV). One of the important issues in automotive batteries is to monitor their online state-of-charge (SOC) and state-of-health (SOH). Open circuit...
Because of overcharge for Li-ion battery is forbidden, there is no natural mechanism to equalize the difference among the cells, so effective balancing method is required to improve the performance of battery and prolong its life time. There are two classifications of balancing methods: passive balancing and active balancing. In this paper, the advantages and disadvantages of these two methods are...
Modeling the dynamic characteristics of the battery pack for EV during charge and discharge is an important aspect in the modeling for the battery pack. The dynamic characteristics of the Li-ion battery pack's loaded voltage were analyzed by means of pulsed-charging and pulsed-discharging the battery pack. A mathematic model was produced to describe variation process of the battery pack's loaded voltage...
An integral battery charger is proposed for an electric scooter with Li-Ion batteries and Interior-permanent-magnet (IPM) traction motor. The battery charger is integrated in the power hardware of the scooter, with the IPM traction drive that operates as three-phase dc-dc converter with power factor correction (PFC) capability. The control of the PFC battery charger is also integrated into the traction...
The pressing need to decrease the greenhouse gases and to improve the efficiency of the existing fleet of vehicles it is imperative that they use some cleaner energy to run the vehicle. Electrical energy can be used in addition with gasoline used by the internal combustion engine of a conventional vehicle to supplement the incremental demand of power above the average power required by the vehicle...
In response to typical issues concerning lithium-ion battery systems for HEVs, a cell-control specialized IC and a scheme for the entire circuit mounting the IC (namely, no isolation and a ldquodaisy-chainrdquo communication architecture) were devised. The circuit was configured with the cell-control specialized ICs with 350 nm, BiDMOS, 50 V/3.3 V analog-digital mixed process. But the circuit can...
Production alternatives for single-walled carbon nanotubes (SWCNT) such as chemical vapor deposition, laser, arc and flame, vary widely in material and energy yields, catalyst requirements and product characteristics. The overall environmental profile must be assessed relative to performance in a specific end-use application, such as lithium ion batteries for electric or plug-in hybrid vehicles. Although...
In this paper, a 2006 GEM eL Golf car was first analyzed and designed for similar vehicle requirements. Placement of vehicle components have been calculated and proposed. An automatic hybrid controller for the vehicle power management is also proposed. Further, the preliminary design is simulated as a series hybrid fuel cell li-ion battery vehicle model in PSAT software. The power flow among vehicle...
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