Introduction to Electric Vehicles  Ed Ristad Alternative Fuel Vehicle Instructor Santa Rosa Junior College altfuels@sonic.net Solar Living Institute.

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Presentation transcript:

Introduction to Electric Vehicles  Ed Ristad Alternative Fuel Vehicle Instructor Santa Rosa Junior College altfuels@sonic.net Solar Living Institute EV101 January 31, 2009 9 AM - 5 PM Green Building Exchange, South San Francisco This presentation is dated 1/28/09 and posted at www.nbeaa.org/osev/presentations/ev_intro.pdf.

> Introduction to EVs What do You Want in an EV? What are Your EV Choices? The Economics of EVs The EV Conversion Process EV Resources

Introduction to EVs Why EVs? Types of EVs EV History EV Charging

Why EVs? All of these issues showed up in the paper one morning.

Why EVs? Energy Independence Greenhouse Gas Reduction 60% of 2006 US oil consumption was imported per the US Government Energy Information Administration Basic Petroleum Statistics, www.eia.doe.gov/neic/quickfacts/quickoil.html. Greenhouse Gas Reduction Transportation accounted for 42% of greenhouse gas emissions in Sonoma County in 2000, according to the Climate Protection Campaign’s January 2005 report “Greenhouse Gas Emission Inventory for all sectors of Sonoma County, California”, www.climateprotectioncampaign.org/news/documents/AP_INVEN.PDF. Air and Water Pollution Reduction Asthma cost $12.7B in 1998 and can be caused by vehicle exhaust, per the Center for Disease Control “Asthma Speaker’s Kit”, www.cdc.gov/asthma/speakit/default.htm. See www.nbeaa.org/bev_faq.htm for more frequently asked EV questions.

Why EVs? EV Energy Consumption 100% 71% Non-Renewable Energy Consumed: 24% 0% Efficiency: Petrol ICE EVs charged by ICE grid EVs offset by PVs made by ICE grid EVs offset by PVs made by PV grid Combustion 15% 35% n/a Grid 90% Energy Generation 300% Charger Battery AC Drive System 85% TOTAL 21% 63% Infinite for 5.5B years Efficiency of fuel input to motor shaft output only. Energy to make EV can be higher, but it makes up a small amount of the total energy consumed from cradle to grave of an ICE.

Types of EVs Hybrid Plug-in Hybrid Battery Only Fuel Cell Ford Escape HEV Toyota Prius PHEV conversion Battery Only Fuel Cell Tesla Roadster BEV Honda FCX hydrogen FCV

Examples of low speed past production EVs EV History: Examples of low speed past production EVs 1914 Detroit Electric: 80 mile range, 20 MPH, NiFe batteries 1980 Commuter Vehicles CommutaCar: 30 MPH, 40 mile range, PbA batteries 1974 Zagato Elcar: 35 MPH, 35 mile range, PbA batteries

EV History: Examples of high speed past production EVs that were sold that can still be found for sale used 1997 Chevrolet S10 EV: 95 mile range, NiMH batteries 1998 Ford Ranger EV: 82 mile range, NiMH batteries 1998 Solectria Force: 84 mile range, NiMH batteries 2002 Toyota RAV4 EV: 94 mile range, NiMH batteries

EV History: Examples of high speed past production EVs that were leased only and can not be found used 1999 Chrysler EPIC: 79 mile range, NiMH batteries 1999 General Motors EV1: 140 mile range, NiMH batteries 2000 Th!nk City: 55 MPH, 45 mile range, NiCd batteries 1999 Honda EV Plus: 80 mile range, NiMH batteries

EV History: Range Record Holders Phoenix Motorcars SUT: charged 50 times in 10 minutes with no degradation in 2007; 130 mile range AC Propulsion tZero: drove 302 miles on a single charge at 60 MPH in 2003, Lithium Ion batteries Solectria Sunrise: drove 375 miles on a single charge in 1996, NiMH batteries DIT Nuna: drove 1877 miles averaging 55.97 MPH on solar power in 2007, LiPo batteries

EV History: Speed Record Holders link to video link to video Motorcycle: Killa-Cycle, 7.890 seconds and 167.99 MPH quarter mile in 2008 with A123 Systems nano-LiFePO4 batteries Dragster: Current Eliminator V, 7.956 seconds and 159.85 MPH quarter mile in 2007 with Altairnano Li4Ti5O12 batteries link to video link to video Modified Conversion: Smoke Screen S10, 11.083 seconds and 119.91 MPH quarter mile in 2008 with AGM batteries Pro Street Conversion: White Zombie, 11.466 seconds and 114.08 MPH quarter mile in 2007 with A123 Systems nano-LiFePO4 batteries

EV Charging At home At an RV park At a public on-grid PV charging station in Vacaville From an off-grid PV generator trailer

Introduction to EVs > What do You Want in an EV? What are Your EV Choices? The Economics of EVs The EV Conversion Process EV Resources

What do You Want in an EV? Students to brainstorm key features:

What do You Want in an EV? Students to brainstorm key features: Payload

What do You Want in an EV? Students to brainstorm key features: Range

What do You Want in an EV? Students to brainstorm key features: Speed

What do You Want in an EV? Students to brainstorm key features: Charge Time

Introduction to EVs What do You Want in an EV? > What are Your EV Choices? The Economics of EVs The EV Conversion Process EV Resources

What are Your EV Choices? Buy 2, 3 or 4 wheel limited or full speed Make Conversion Overview Donor Vehicle Batteries Drive System Charging System Examples Wait EV Research

Examples of Current Production 4 Wheel EVs Buy: Examples of Current Production 4 Wheel EVs www.acpropulsion.com www.teslamotors.com AC Propulsion eBox conversion: 120 mile range, LiIon batteries; $55K plus Scion xB Tesla Motors Roadster: 220 mile range, LiIon batteries; $109K www.venturifetish.fr www.commutercars.com Commuter Cars Tango T600: 200 mile range, LiIon batteries; $109K Venturi Fetish:155 mile range, LiIon batteries; $400K

Current Production 3 and 2 Wheel EVs www.zapworld.com www.myersmotors.com Zap Xebra conversion: 40 MPH, 25 mile range with AGM PbA batteries; $12K Myers Motors NmG: 45 mile range with LiIon batteries; $30K www.vectrix.com www.thunderstruck-ev.com/Lepton.htm Lepton Scooter: 28 MPH, 30 miles with AGM PbA batteries, $2K Vectrix Motorcycle: 62 MPH, 60 miles with NiMH batteries, $12K

Make: Conversion Overview

Components found on radiator plate Make: Conversion Overview Components found on radiator plate Brusa NLG511

Make: Conversion Overview Major EV components not in radiator box Azure Dynamics AC24LS (DMOC445 Controller not shown) Electro Automotive Custom motor motor to clutch and transmission adapter Valence Technologies U24-12XP console batteries

Make: Donor Vehicle Class Payload after ICE removed vs. weight Space to put EV components Cost of conversion components Scooter ~ + Motorcycle Mini car Compact car Compact truck Mid-size car - Mid size truck Full size car Full size truck

Make: Donor Vehicle

Make: Batteries Type Power Energy Stability Max temp Life Toxicity Cost LiFePO4 + ~ - LiCO2 NiZn NiCd PbA AGM PbA gel PbA flooded Available large format only considered; NiMH, small format lithium and large format nano lithium not included.

Make: Batteries Examples of commonly used EV batteries. Type Makes Models LiFePO4 Thunder Sky Valence Technologies LMP U-Charge XP LiCO2 Kokam SLPB NiZn SBS Evercel NiCd Saft STM PbA AGM BB Battery Concorde EnerSys Hawker Exide Optima EVP Lifeline Genesis Odyssey Orbital Extreme Cycle Duty Yellow Top Blue Top PbA gel East Penn Deka Dominator PbA flooded Trojan US Battery Golf & Utility Vehicle BB Series Examples of commonly used EV batteries. Search EV Discussion List Photo Album at www.evalbum.com for details.

Make: Batteries Calculating Voltage Drop Voltage sags with increased current and internal resistance per Ohm’s Law, robbing potential output power to generate heat. voltage = current x resistance V = I x R Volts = Amps x Ohms 1000 milli-Ohms = 1 Ohm Example voltage drop on 12 Valence U24-12XPs at continuous current rating: 12 x 150 Amps x .006 Ohms = 10.8V on 154V nominal pack = -7%

Make: Batteries Calculating Battery Power Acceleration rate varies with peak power. Top speed and hill climbing ability varies with continuous power. power = current x voltage P = I x V Watts = Amps x Volts 1000 watts = 1 kilo-Watt = 1 kW 1 kW = 1.34 Horsepower Example battery power of 12 Valence U24-12XPs at continuous current rating: 12 x 150 Amps x (12.8 Volts - .006 Ohms x 150 Amps) = 21.4 kW

Make: Batteries Calculating Energy Battery capacity is how much energy it will hold. Capacity = power x time Wh = W x h Watt-hours = Watts x hours 1 Watt-hour is equivalent to 1 Watt drawn for 1 hour 1000 Wh = 1 kWh 1 kWh = 3413 BTUs Example capacity of 12 Valence U24-12XPs at continuous current rating: 12 x 100 Amp-hours x (12.8 Volts - .006 Ohms x 150 Amps) = 14.2 kWh

Make: Batteries Estimating Range Range varies directly with battery capacity. Range varies inversely with DC energy consumption rate. Range = capacity / DC consumption rate = Watt-hours / Watt-hours per mile Example range estimate of Mustang EV: 14,200 Wh / 375 Wh / mi = 37.9 miles with new batteries 37.9 miles x 0.8 = 30.2 miles after 5 years, assuming 4% decline per year See http://www.geocities.com/chris_b_jones@prodigy.net/EV/1.htm for details.

Make: Batteries

AC: regen, efficient, brushless Make: Drive System Controller Power AC: regen, efficient, brushless Safety Available Cost Solectria ~ + MES-DEA - Siemens AC Propulsion Curtis

Make: Drive System Calculating Motor Power Motor Power varies with power input and drive system efficiency. output power = input power x efficiency Po = Pi x Eff Watts = Watts x efficiency ratio Example peak motor shaft power of Mustang EV : 325 Amps x 12 x (12.8 Volts - .006 Ohms x 325 Amps) x 75% = 31.7 kW = 42.5 Horsepower Note: this propels a 3000 pound car 0-60 MPH in 23 seconds, approximately at the flow of traffic – much less than the peak rating of gasoline cars.

Make: Note: EV motors have wider RPM torque band so they better compare to ICE motors with ~25% more torque and horsepower.

Power Factor Correction Make: Charging System Brand power isolated Input voltage range Power Factor Correction Sealed UL, FCC cost Brusa ~ + - DeltaQ Zivan Manzanita Micro Russco

Make: Charging System Estimating Charge Time Charge time varies with charger output power. charge time ~= battery capacity / charger power t = Wh / W hours = Watt-hours / Watts Example charge time of Mustang EV : 12 x 12.8 Volts x 100 Ah / 3300 W ~= 4.7 hours

Make: Examples John Warobiew’s 1983 Volkswagen Rabbit GTI, 35 mile range, PbA batteries Chris Jones’ 1966 Ford Mustang Convertible, 33 mile range, LiFePO4 batteries Peter Oliver’s 1956 Porsche 356 Speedster replica, 100 mile range, LiFePO4 batteries Ed Ristad’s 1990 Volkswagen Cabriolet, in process

Wait: EV Research Stanford University Silicon Nanowire electrodes: 3X capacity improvement expected for Lithium batteries MIT Nanotube ultracapacitors: very high power, 1M+ cycle energy storage approaching Lithium battery capacity

What do You Want to Do? Students to brainstorm their thoughts about their own EV plans, including: Make Buy Wait

Introduction to EVs What do You Want in an EV? What are Your EV Choices? > The Economics of EVs The EV Conversion Process EV Resources

The Economics of EVs: Worst Case Example 2008 Mustang Convertible ICE 1966 Mustang Valence LiFePO4 EV Conversion Durable hardware cost, excluding batteries $24K new Kelley Blue Book value $13K conversion components $5K conversion labor $10K donor car $28K subtotal: $4K more Battery amortization n/a $17K every 5 years Financed at 5% APR $12 per day Fuel efficiency 20 MPG 2 miles per kWh Fuel cost $2 per gallon 12 cents per kWh Fuel cost per mile 10 cents 6 cents Daily ongoing cost at 20 miles per day $2 $13.25: $11.25 more per day Assumes maintenance cost is low for both vehicles.

The Economics of EVs: Ways to break even Gas price rises 6.5X to $13 per gallon Gas is now $10 per gallon in England Battery price reduced 85% to $2.6K PbA achieves this, but significantly reduces available payload for passengers and cargo, is toxic, and requires hydrogen gas management; Loose LiFePO4 cells are cheaper, but reliability and BMSs just being proven; volume discounts could help Battery life extended 6.5X to 33 years Government Incentives for EVs were $4K per year Or some combination of the above.

Introduction to EVs What do You Want in an EV? What are Your EV Choices? The Economics of EVs > The EV Conversion Process EV Resources

The EV Conversion Process Preparation Fabrication and Assembly Machining Welding Metalworking Wiring Installation in to Vehicle Test

Preparation: Refurbish non-ICE systems including brakes, steering, suspension, electrical, interior and exterior, then measure ride height

Preparation: Make transmission locating fixture

Preparation: Pull transmission and measure depth from flywheel to block, then pull motor, radiator, exhaust system and gas tank

Fabrication and Assembly: Have custom motor adapter ring, plate and hub with pilot bushing made, then assemble ring and plate to motor

Install taper lock bushing Fabrication and Assembly: Install taper lock bushing

Loosely attach hub to taper lock bushing Fabrication and Assembly: Loosely attach hub to taper lock bushing

Loosely install flywheel and set to proper depth from plate Fabrication and Assembly: Loosely install flywheel and set to proper depth from plate

Remove flywheel, torque hub, then check dimensions Fabrication and Assembly: Remove flywheel, torque hub, then check dimensions Note: adapter plate was off .062” that caused clutch scraping in this example.

Replace flywheel and torque to specification Fabrication and Assembly: Replace flywheel and torque to specification

Check flywheel for dimensions Fabrication and Assembly: Check flywheel for dimensions

Fabrication and Assembly: Assemble clutch

Fabrication and Assembly: Lube clutch fingers; install clutch pivot fork, throw out bearing and dust boot; attach bell housing to plate; attach transmission to bell housing

Fabrication and Assembly: Place drive train in car; mount transmission end; use transmission fixture to align transmission; weld and paint motor mount adapters; attach motor mount adapters to plate and motor

Fabrication and Assembly: Weld and paint accessory battery mount and hold down; install accesory battery where starter battery was

Fabrication and Assembly: Weld and paint front battery mounts and hold downs and attach them to motor mount adapter; install front batteries, assemble radiator plate and connect accelerator rod to pot box

Fabrication and Assembly: Weld and paint rear rack; make, rubber paint and mount rear splash shield on to rear rack; install where gas tank was

Assemble front to rear underbody conduit subassembly Fabrication and Assembly: Assemble front to rear underbody conduit subassembly front end rear end

Install conduit assembly in to car Fabrication and Assembly: Install conduit assembly in to car

Machine and assemble AC inlet Fabrication and Assembly: Machine and assemble AC inlet

Install rear batteries and AC inlet Fabrication and Assembly: Install rear batteries and AC inlet

Wire up rear batteries and AC inlet; fabricate and install trunk floor Fabrication and Assembly: Wire up rear batteries and AC inlet; fabricate and install trunk floor

Fabricate AC extension cord and adapters Fabrication and Assembly: Fabricate AC extension cord and adapters

Fabrication and Assembly: Install trunk floor pad, trunk rug and spare tire; place AC extension cord and AC adapters in trunk

Fabricate, wire up and install console and interconnecting wire looms Fabrication and Assembly: Fabricate, wire up and install console and interconnecting wire looms

Fabrication and Assembly: Verify no ride height change; align wheels to 1/16” toe-in; program motor controller, charger, and BMS as necessary; charge pack then each cell individually

Test: Attach data acquisition system to vehicle; drive vehicle around town, on the freeway and up hills at varying speeds; drive until the first cell drops to manufacturer’s minimum specification but no further to avoid permanent damage

Verify key parameters meet or exceed expectations. Test: Verify key parameters meet or exceed expectations. Parameter Expected Measured Weight, pounds: curb resulting payload 2975 704 TBD 0-60 MPH, seconds 23 Top Speed, MPH 70 Range, miles 38 40 Battery capacity: Ah kWh 100 14.2 104 15.1 Battery current at 65 MPH, Amps 150 144 Charge time, hours: 240V 120V 5 20 Example results for Mustang EV with new battery pack.

Introduction to EVs What do You Want in an EV? What are Your EV Choices? The Economics of EVs The EV Conversion Process > EV Resources

EV Resources EV Conversion Classes General EV Information Santa Rosa Junior College DET 193 all semester long Saturday class, busapp02.santarosa.edu/SRweb/SR_CourseOutlines.aspx?CVID=18632&Semester=20087 Solar Living Institute EV201 1 week class, http://www.solarliving.org/store/product.asp?catid=13&pid=2009 General EV Information Electric Auto Association, www.eaaev.org; a local chapter www.nbeaa.org EV Tradin’ Post electric vehicle classified ads, www.austinev.org/evtradinpost/ Vacaville PV EV incentives and charging stations: www.cityofvacaville.com/departments/public_works/evprogram.php EV World Magazine www.evworld.com Idaho National Laboratory and National Renewable Energy Laboratory Advanced Vehicle Testing EV test data, avt.inel.gov/fsev.shtml

EV Resources Local Custom EV Conversion Shops EV Component Suppliers Make Mine Electric www.makemineelectric.com Thunderstruck Motors www.thunderstruck-ev.com EV Component Suppliers Electro Automotive www.electroauto.com Metric Mind www.metricmind.com PV Information Solar Rover mobile power systems, www.solarover.com

EV Resources Fast Charging EV Components EV Racing A123 Systems nano LiFePO4 batteries, www.a123racing.com Altairnano nano LiIon batteries, www.altairnano.com/markets_energy_systems.html AeroVironment off-board charger, www.avinc.com/PosiCharge.asp Phoenix Motorcars SUT using Altairnano batteries, www.phoenixmotorcars.com EV Racing Delft University of Technology (Netherlands) solar powered race car, en.wikipedia.org/wiki/Nuna4 National Electric Drag Racing Association, www.nedra.com EV Research Stanford University silicon nanowire battery electrodes, news-service.stanford.edu/news/2008/january9/nanowire-010908.html Massachusetts Institute of Technology nanotube ultracapacitors, web.mit.edu/erc/spotlights/ultracapacitor.html