Tesla Car Technology Presentation by

Syed Furqan Rafique （舍耶特）

Tesla Car Technology

Agenda IntroductionSpecialty of Tesla MotorsSuper charging capabilityFastest Battery SwappingTesla innovations in its EVs Exquisite Interior Safety standardsFuture of EVsReferences

Introduction

Introduction• Tesla Motors, Inc. is an American

company that designs, manufactures, and sells Electric Vehicles.

• Get attention with its famous and fully electric sports car Tesla Roadster.

Continued…• Award winning Tesla Model S , a fully electric luxury

sedan, and its next two vehicles are the Models X and 3.

Specialty of Tesla Technology• 60 kWh microprocessor controlled, lithium-

ion battery• Three phase, four pole AC induction motor

with copper rotor.• Drive inverter with variable frequency drive

and regenerative braking system.• Tesla starts with thousands of best-in-class

Lithium-ion cells and assembles them into a liquid-cooled battery pack, wrapped in a strong metal enclosure. The battery is optimized for performance, safety, longevity, and cost.

Super charging capability• The Supercharger is a proprietary DC rapid-

charging station that provides almost 100 kW of power, giving 85 kW·h vehicles an additional 150 mi (240 km) of range in about 30 minutes.

Innovative Battery Swapping • Tesla designed its Model S to allow fast

battery swapping, which also facilitates vehicle assembly. In June 2013, Tesla announced their goal to deploy a battery swapping station in Tesla stations. At a demonstration Tesla showed a battery swap operation taking just over 90 seconds, about half the time it takes to refill an empty gas tank.

Panoramic view of Tesla Supercharger rapid charging station in Tejon Rench, California.

Tesla Innovations in EVs

Battery life optimization • Number of factors limit the battery service

life 1. Number of charging cycle that battery

subjected to.2. Rate of charging (slow Vs fast charge).3. Level of charging i.e. 75% of full

charge ,full charge or over charge.4. Level of discharging before charge i.e.

completely depleted ,still charge or full charge.

5. Internal temperature during use and nonuse as well as mechanical and chemical instability.

1. Rigid cell separation from avoiding thermal runaway

• Lithium ion battery have problem of thermal runaway hence the spacer assembly maintain the position of cells within battery ensuring the cooling system works well all the time.

Patent # US2013078494A1

2. Vehicle battery pack thermal barrier

• Integrated thermally mounted assembly for battery pack located between floor panel and driving surface that provide noise isolation ,thermal isolation and vibration damping as well as hard enough in case of accidents.

Patent # US2013153317A1

3. Battery humidity control • Control the humidity of the battery pack using

selective removal of water vapour by using desiccant chamber .

• Patent # US8247097B1

4. Cell failure indication within Battery pack

• Monitor the electrical isolation resistance with in the battery in order to check the cell failure from thermal runaway.

Patent # US2013049971A1

5.Battery pressure monitor for thermal events

• Use sensors within battery pack to check the pressure within the cells due to thermal runaway and check the data results with preset values.

Patent # US2013260192A1

6. Set DC charge current • Conventional on board charger in EV

are usually charged via battery charger request to use DC charge current from the outlet and cant use the full AC wall power that is the drawback in charging .

Patent # US2012091953A1

7. Range Extender Option• Use an extra fuel engine to

charge the battery if fall below level of particular charging percentage.

Patent # US2013066506A1

8. Control Dual motor drive system

• Check the speed of the back wheels using a sensors and adjust the torque provided by each motor in order to minimize wheel slip.

Patent # US2013241445A1

9. Fast charge mode for extended trip

• Method implemented in the vehicle for early identification of fast charge station and prepare battery cells for fast charge.

Patent # WO2014070654A1

Tesla Model S

Exquisite Innovative Interior

Safety Standard • On August 19, 2013, based on

NHTSA safety ratings, a Tesla press release claimed that the Model S had achieved the best safety rating of any car ever tested.

Future Of EVs

Model X ..a Future car

Generation 3 . EVs for Mass Market

References

References• http://en.wikipedia.org/wiki/

Tesla_Motors#Battery_technology• http://en.wikipedia.org/wiki/Tesla_Model_S• http://www.teslamotors.com/fr_CH/forum/

forums/battery-management-system-bms• http://www.teslamotors.com/roadster/

technology/battery