8/12/2019 ERDT Poster

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BATTERY PERFORMANCE AND MANAGEMENT

SYSTEM OF E-VEHICLES IN THE PHILIPPINES

William F. INFANTE, Sherdon Nio Y. UY, Nathaniel Joseph C. LIBATIQUE, and

Gregory L. TANGONAN

Ateneo de Manila University, Quezon City, Philippines

Manila Observatory, Quezon City, Philippines

As hybrid electric vehicles and electric vehicles rise in the interna-

onal market as well as localized versions such as e-Jeepneys and e-

Tricycles, their feasibility as future transport system becomes signi-

cant. Part of the deciding factor is the storage system and thus, it is

imperave to have an energy management system for electric vehi-

cles in the Philippines.

Dual-source storage system (lead-acid baeries and supercapaci-

tors) has been of research interest because of their capability of

handling voltage spikes and sll have stable open circuit voltage;

however, current deployments of e-tricycles in the Philippines only

provide lead-acid baeries as their baery source.

Aside from this, mainstream monitoring of the baeries only ob-

serve open circuit voltage but other state parameters are needed

such as the state of charge, state of health, and temperature varia-

on for beer feedback.The proposed research presents a more pragmac way of monitor-

ing the energy management system through the evaluaon of dual-

source systems and inclusion of addional parameters such as tem-

perature for e-vehicle baery monitoring in the Philippines.

Simulaons using Simulink in MATLAB suggests that hybrid system

can improve the eciency of vehicles in stop-start condions. A

lookup table has also been proposed for dynamic baery diagnosc

tesng of e-vehicles for addional performance tests such as two-

pulse load tests for nding the state of health

ABSTRACT

METHODOLOGY

RESULTS

CONCLUSION RECOMMENDATION

In the parallel setup, the increase in eciency is because of the

use of the engine as a prime mover in addion to running the elec-

tric generator.

Dierent drive cycle input can vary the duraon the vehicle can

avoid operang the internal combuson engine. Since the engine

runs the vehicle while charging the baery, the amount of fuelconsumed is higher than a serial hybrid vehicle with a similar e-

ciency.

The serial hybrid vehicle have the lowest average fuel consump-

on among the three when in heavy trac condion. In terms of

energy recovered, the energy recovered in the NEDC cycle is great-

er than the Jeepney driving cycle. A serial hybrid vehicle is best

suited for stop and go condions.

In terms of the baery state of charge, the Gardens table in re-

lang electrolyte temperature with state of charge has been mod-

ied into a dynamic lookup table to provide a diagnosis if furthertest are needed such as a two-pulse load test for tesng the State

of Health

The hybrid vehicles had simulaons resulng in beer eciency especial-

ly in the frequent start-stop condions in the Philippines. For connuing

this research, a modular approach prototype with dual source modules of

lead-

acid baeries and supercapacitors would provide empirical tesngfor addional validaon such as the switching speeds.

The foundaon of this ongoing research involves making simulaons

of convenonal, serial hybrid and parallel vehicles. A comparison is

targeted for comparing the advantages of using hybrid vehicles with

dual source system in the trac condions on the road in the Philip-

pines. The QSS-TB from the Swiss Federal Instute of Technology

was used as a toolbox integrated with Simulink and MATLAB. Auto-

maon and empirical validaon with baery parameters such as

state of charge and state of health has also been explored for e -

vehicles. A lookup table for diagnosc tesng has also been pro-

posed if further parameters are needed as an indicaon of charging

and or replacement.

A third part is modeling simple baery failure in e-vehicle. The rst

step involves varying internal resistance is varied. As the baery de-grades, there will come point where the demanded power of the

electric motor is not met. The baery also discharges at a faster

rate. To accommodate the baery failure simulaon, modicaons

were made from the QSS-TB.

Comparison of Convenonal, Serial and Hybrid Vehicles us-

ing Jeepney and the New European Drive Cycles

Energy recovery of a serial and a parallel hybrid vehicleSummary of average fuel consumpon of a conven-

onal, serial, and parallel hybrid vehicle with NEDC

and Keepney drive cycle input

Baery State of Charge

Baery Failure Simulaon

ACKNOWLEDGMENT

State of Charge Denion

State of Charge Approximaon

Given the driving cycle of the Jeepney transportaon in the Phil-

ippines where start and stop condions are frequent, the serial

hybrid simulaon is the most ecient in terms of fuel consump-

on compared to the convenonal, and parallel hybrid electricvehicles.

In determining the state of the baeries, nested test using a

lookup table was also constructed for faster diagnosis of the lead

-acid baeries used in e-vehicles.

Baery failure has also been explored and compared to the per-

formance of a normal baery. It has been shown in the simula-

on that the recovered energy of the electric motor is also wast-

ed.

Average Fuel Consumpon of the Jeepney in

Stop and Go Condions