A novel approach on range prediction of a hydrogen fuel cell electric truck C.Venkatesh - Manager - Product Development, Sustainable Mobility & Advanced Technologies Abstract: A novel approach on range prediction of a hydrogen fuel cell electric vehicle Abstract: Today's growing commercial vehicle population creates a demand for fossil fuel surplus requirement and develops highly polluted urban cities in the world. Hence addressing both factors are very much essential. Battery electric vehicles are with limited vehicle range and higher charging time. So it is not suitable for the long-haul application. Hence the hydrogen fuel cell based electric vehicles are the future of the commercial electric vehicle to achieve long range, zero emission and alternate for reducing fossil fuels requirement. The hydrogen fuel-cell electric vehicle range, it means the total distance covered by the vehicle in a single filling of hydrogen into the onboard cylinders.
Electrical release machining (EDM), is a material removal procedure whereby a coveted shape is acquired by utilizing electrical releases (sparks). Material is expelled from the work piece by a progression of quickly repeating current releases between cathode and anode, isolated by a dielectric fluid and subject to an electric voltage. At the point when the voltage between the two terminals is expanded, the power of the electric field in the volume between the anodes winds up more prominent than the quality of the dielectric (in any event in a few spots), which separates, enabling current to stream between the two cathodes. This wonder is the equivalent as the breakdown of a capacitor (condenser). Accordingly, material is expelled from the cathodes.
“NuGen Mobility Summit-2019” Paper Title : Determining the State Of Health [SOH] of Li Ion cell Authors: Sushant Mutagekar, Ashok Jhunjhunwala, Prabhjot Kaur Objective Cells age with life. This aging is dependant on various factors like charging/discharging rates, DOD of operation and operating temperature. As the cell ages it undergoes power fade (ability to deliver required power at particular State of Charge [SOC]) and capacity fade (the charge storage capacity of cell). In an Electric Vehicle it is important to know what power shall be demanded from a battery irrespective of what its current SOC is and number of cycles it has undergone. With minimal accuracy and less computational power, it is difficult for a Battery Management System [BMS] to accurately determine SOH; the paper proposes a a precise model that may help.
An electric vehicle is significantly promoted by government and industry to reduce carbon footprint and effective energy management. IC engines get replaced by the battery and diagnosis parameters of engine also need to replace with battery parameters. Main objective is to provide analysis of battery to battery swapping stations. State of charge and state of health plays important role in battery management system and vehicle performance. State of health estimation has many techniques, but large equipment needs for it and become costlier and bulkier. Batteries internal resistance increases as it gets degraded, proposed technique based on adaptive method which didn’t need any extra hardware, this technique identifies the health based on degraded capacity. Cloud platform is used to store the data and process it and display to users and swapping station. Status updating unit located on battery is connected to cloud and it gives complete analysis of battery to vehicle users.
We developed the electric motorcycle model “PCX ELECTRIC” that satisfies usability under the traffic environment in apan and ASEAN’s motorcycle sales major countries. The PCX ELECTRIC features easily removable battery packs, which practically helps eliminate the waiting time associated with charging the battery. The compactly designed EV system, which is efficiently packaged in the vehicle, uses two removable 48 V battery packs connected in series to realize a 96 V system suitable for driving the electric motorcycle. The EV system mounted on the body of the 2018 PCX achieves a motor power of 4.2 kW, top speed of 60 km/h, and cruising range of 41 km (at a steady 60 km/h). In addition, we developed a highly-convenient battery attaching system that enables fixing of the battery to the vehicle body and engaging of the connectors with a single action operation.
Background: Due to Environmental concern worldwide, Mobility is under pressure to shift gear from fossil fuel to Electric. This is Rebirth of Electric Mobility is with state’s initiative, but it is facing bigger challenges than the 1900s era. Fossil fuel vehicles have already carved the benchmark on ease of range per charge, and time of charge (filling of fossil fuel), which needs to be at least matched by Electric Vehicles. The success of electric vehicles will not only be driven by state policy but also by performance and Economic Viability. While at this introduction level state is trying best to offset cost by way of subsidy/tax-sops offering. So, in clear terms “Performance of Electric Vehicles” need to be addressed and enhanced to put them in main stream in place of fossil fuel vehicles. In last 100 years there has been significant technological development in Motors, and Energy Storage, which is base of Electric mobility.
Engineering objective Light Electric Vehicles (LEV) with Li-ion batteries suffer from short battery life and poor efficiency, due to low grade electronics. Battery management systems (BMS) cannot always keep the pack in balance, and after cell voltages drift, capacity of the pack diminishes and some cells may destruct, causing a fire. The paper describes a novel approach to LEV powertrains using parallel connected battery cells & control methodology that keep cells in balance naturally, thereby eliminating BMS and hence safer to use. Li-Ion cells with different chemistries can be used and superior thermal management reduces temperature rise, resulting in longer battery life. Methodology Based on the original invention by the author, the system circuit schematics was designed and simulated using OrCAD PSpice. After obtaining results from the simulation, the first prototype device was constructed and tested in laboratory.
Objective : Objective of the paper is to acquaint the audience with the concept of electric vehicles, Powertrain components used in an electric bus, Siemens contribution to the field of Electromobility, Typical configurations used in an electric bus, challenges and current limitations, emerging Technologies, future, how to address the future charging infra requirement. Methodology : The subject shall be discussed with the audience through a presentation coupled with Explanation by the presenter. The topic shall be opened with the concept of electromobility followed By history of electromobility at Siemens, contribution to the field of electro mobility, typical configurations of electric vehicles, Advantages of electric vehicles vis a vis conventional diesel buses, typical configurations of an electric bus, feasibility of electric buses for various transport services. Comparison of induction motor Vs.
E-Rickshaws are receiving considerable attention as a sustainable passenger transportation in Indian mobility space. As per the recent reports, more than 1.5 million e-rickshaws are currently operating in the country. These are quieter, cleaner and convenient mode for last mile connectivity and are typically used for short distance (<10Km) commutation. For owners, these vehicles offer value in terms of affordability and operating cost. Challenge for manufacturers is to design a vehicle which balances the requirements of both passengers and owners. Energy efficiency (Energy consumption per Km) influences such critical decisions. There is always a difference between the catalog value and actual on-road Energy efficiency figures and therefore it's important to really understand owner requirements w.r.t. market where vehicle is going to be operated.
Introduction: The advent of electric mobility is changing the conventional mobility techniques and their application in automobiles across all segments. This development comes with challenges ranging across varied sub -systems in a vehicle including Power Train, HVAC, Accessories, etc. Objective: This paper would concentrate on the Power train related sub systems & improvement of the same both in terms of Efficiency & Performance. Methodology: The electric power train consists of three major sub parts: 1. Motor Unit 2. Controller with Power electronics 3. Battery Pack with BMS We would concentrate on improving the overall efficiency and performance of all these subsystems while they perform in vehicle environment and work in tandem by deploying following techniques: a. Improved Regenerative Braking for converting vehicles Kinetic energy into electrical energy using specific algorithms and control techniques b.
Two wheelers are the major mode of single transport in the metros of India. They contribute about 70 % of the auto market unit wise. Also it is proved from the research that for per unit energy consumption they contribute more to the environment emission. Conventional IC engine based energy supply unit can be replaced with an electric DC motor with chargeable battery as the energy source for the two wheelers present in the market. In the current research, engine is replaced with the motor, batteries and controller. The above system is placed on the space emptied by the conventional engine, The design developed is tested on different gradients for identifying the motor torque for minimum and maximum resistances available on the road. The paper provides an insight on the of the torque requirements based on variable resistances required for two wheelers. Also the system will be used as a retrofit for the existing IC engine bikes to be converted in electric bikes.
As electric vehicles are working on stored energy in batteries or cells. These units needs to be regulated by cool down or heat up to perform utmost and to ensure individual cell life. Battery cooling systems are installed on vehicles to regulate the temperature around these packs. To ensure maximum performance of these units, numerical simulation is performed. Optimization (includes study of cover design, number of openings, area & position of openings around the cover in which unit is mounted) of flow rate as well as flow path into battery cooling systems is carried out. This study is carried to design a stable unit.
Chemical reaction inside a cell, converts chemical energy into electrical energy and causes electric current to flow. If electric current passes backwards in a cell, it charges the cell. In a Li-Ion battery Lithium ions move from negative electrode to positive electrode during discharge and backwards when charging.
Battery operated vehicle need accurate management system because of its quick changes in State of charge (SOC) due to aggressive acceleration profiles and regenerative braking. Li-ion battery needs control over its operating area for its safe working. So, the main objective of the proposed system is to develop a BMS having algorithms to estimate accurate SOC, predict degradation parameters, balance individual cells, manage cell temperature, and provide safe area of operation defined by voltage and temperature. Proposed methodology uses Model-based Design approach wherein nonlinear behavior of battery is modeled as Equivalent Circuit Model to compute the SOC and degradation effect on battery to decide the end of life of battery, also performing inductive Active balancing on cells to equalize the charge. proposed algorithms communicate with the vehicle ECU through CAN to assist the driver for runtime estimation, time for battery swapping, Alerts.
Objective It is very important to simulate the battery pack being built to understand its behavior when used in applications especially Electric vehicles (EV). All Li-Ion cells are not the same. They need to be characterized before building any battery pack. Hence modeling the battery pack to simulated its performance in the actual conditions becomes important. Methodology To understand the behavior of cells in the on-field environment, they are tested at various conditions like different rates of charging/discharging, various depth of discharge (DOD), ambient temperature, etc. HPPC test is also performed on cells to derive its RC model equivalent model. GT Suite simulation software is used to model the Li-Ion cell using the testing data. Depending on the pack configuration, the modeled cell is connected in the required series and parallel configuration, to study the battery pack with respect to aging, performance and cooling requirements.
Predominantly the biggest question that haunts the EV Market is the charging infrastructure that should eventually ease the nervousness of the consumers and allowing EV to penetrate the Indian market with changes done within urban areas and highways. There are multitude of options available ranging from onboard charging via home charging point to a Fast DC off board charger that can be used to charge an EV. There are multiple factors that can be used to evaluate the options and their pros / cons. Some of these factors are: • Cost, time to charge, health of battery, charging and discharge rate of the battery, etc… • Convenience and availability of charging point • Ease of operation including payment • Safety and Security • Ambient temperature in which charging is done There are mainly these categories of charging options: • Residential charging based on a home charging point. The charger is mounted on the vehicle (onboard) and the EV cable can be connected to the home plug point.
Small electric vehicles are challenging in nature while designing the power train and especially the mounting of batteries within the volume available. In this research, power train of small electric vehicle is designed and it is compared with the electric vehicles. The designed vehicle should meet the requirements of urban car so that it can be preferred in urban mobility. Emphasis is given on studying performance parameters such as motor speed, torque for different urban driving cycles by altering the motor and its no. of poles. Battery pack is designed to fit under the front hood of the vehicle whereas motor is fitted at the rear. Range is estimated using Simulink and it is validated with mathematical calculation using Peukert method performed in MATLAB. It is concluded that the designed vehicle with Switched Reluctance Motor 6/4 configuration of 15 kW, 110 Nm is sufficient to meet the urban car in 2020 targets. NCA battery is preferred for range improvement.
One of the significant challenges in the present scenario is the depletion of fossil fuels. As the use of conventional fuel is increasing day by day, it will lead to the complete depletion of fossil fuel in the future. So, an alternate solution to this problem is the use of electric vehicles which is independent of the dependence on fossil fuels. Electric vehicles (EVs) use batteries to power them and are electric motor driven. One advantage of using these electric vehicles is that they are pollution free and smokeless. One of the critical limitations of these electric vehicles is the low driving range per charge. The main proposal of this paper is the implementation of a regenerative braking system (RBS) which helps in recovering the kinetic energy that gets wasted during braking. RBS will be very useful in hilly terrain areas where much potential energy can get recovered while moving down the hill.