The Tesla Roadster Battery System
Tesla Motors
August 16, 2006
By Gene Berdichevsky, Kurt Kelty, JB Straubel and Erik Toomre
Summary
This paper provides details about the design of the Tesla Roadster’s lithium-ion (Li-ion) battery pack (otherwise known as the ESS, or Energy Storage System) with a particular focus on the multiple safety systems, both passive and active, that are incorporated into the pack. This battery pack has been under development and refinement for over three years and is the cornerstone of the Tesla Roadster. The high level of redundancy and multiple layers of protection in the Tesla
Roadster battery pack have culminated in the safest large Li-ion battery that we or many of the experts in the field, with
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The Tesla Roadster battery pack is comprised of about 6800 of these 18650 cells, and the entire pack has a mass of about 450kg.
The engineers at Tesla Motors selected cells from reputable Fortune 500 battery suppliers that have each produced billions of safe, reliable, Li-ion batteries. All the cell manufacturers that
Tesla Motors has considered invest a great deal of money and engineering resources to minimize manufacturing defects within their cells. Overall, the selection criteria used by Tesla Motors included multiple factors, confirmed by extensive internal and external testing, that directly relate to the cell’s overall safety in the Tesla Roadster.
Design Safety Features: Cell Level
Since the 18650 cell is the fundamental building block of the battery pack, it is important that it be fault tolerant. The cells used in the Tesla Roadster all have an internal positive temperature coefficient (PTC) current limiting device. The primary role of this PTC is to limit short circuit current on an individual cell level. It is important to note that this device is completely passive and functions without any inputs from the rest of the battery pack systems.
A second level of protection is provided by the Current Interrupt Device (CID). Each battery cell used in the Tesla Roadster has an internal CID. These devices serve to protect the cell from
Kirsch’s main argument in the article is that there are no better storage batteries for the electric vehicle despite smaller technological changes or improvements that have relatively enhanced the capability of these vehicles. The expectations for better storage batteries were not realized though the electric vehicle was
We design, develop, manufacture and sell high-performance fully electric vehicles and advanced electric vehicle powertrain components. We have established our own network of sales and service centers and Supercharger stations globally thus creating a unique business model in the automobile industry. We
Tesla EV Focus on potential cost saving on gas, reduce cost on service and repair.
Lithium-ion batteries are becoming more common in portable electronic devices due to their high-energy density, lack of memory effect, and high charge and discharge rate capabilities. Research and development work is ongoing to improve safety and increase capacity, charge/discharge rate, and lifetime. Demand for electric vehicle batteries is currently small, but it is expected to grow very quickly. China, Japan, South Korea, France, and the United States are the major lithium-ion battery manufacturers for hybrid and electric vehicle applications.
The paper provides a summary of Tesla Motors, the company outlined. Explaining the relationship between cost-volume-profit analysis is discussed as well as how the company is using this tool to maximize production and profit.
Control software: For the battery pack and the performance safety systems, Tesla vehicles had developed a lot of microprocessors and the sophisticated software. There were different algorithms, which generated a different sensation which drivers expected from an internal combustion engine, without applying pressure on the accelerator.
The purpose of this memo is to compare the financial performance of Tesla Motors Inc. to the Bayerische Motoren Werke AG. BMW AG was selected because they are in direct competition with each other in the fully electric power motor vehicles. BMW has been chosen because they currently offer the most fully vehicles on the market compared to any other automotive manufacturer. BMW is also one of the only manufacturers that has invested resources into developing its electronic drive system (I-Drive) instead of buying an existing model of electronic drive system like other car manufacturers such as Mercedes(TechCrunch). After completing a financial analysis of the two companies it can be concluded that Tesla Motors Inc. is in a weaker financial position compared to BMW AG.
Tesla Motors is anticipated to invest a lot of money in the billions range on an upcoming factory that makes just batteries.
Our goal when we created Tesla a decade ago was the same as it is today: to accelerate the advent of sustainable transport by bringing compelling mass market electric cars to market as soon as possible. If we could have done that with our first product, we would have, but that was
Tesla Motors is a global enterprise specializing in the design, production, and marketing of electric powered vehicles founded in 2003 by the young businessman, Elon Musk. Elon is well known for co-founding paypal, and now he amazes the world again with his incredible vision of Tesla Motors, and being the main product architect. Tesla Motors appeals to the environmentally friendly market, by currently being the only company to sell a zero-emission sports car. Tesla’s fundamental motive and selling point is producing only electric vehicles, as opposed to competing companies, producing a combination hybrid, or diesel car.
Tesla could be considered the car of the future. I has many features that are innovative and defining of Tesla. One such innovation is
Tesla is taking a different approach while designing their self-driving cars. Tesla has introduced the computer vision-based vehicle detection system instead of using the traditional radar. The new Tesla cars contain eight surround cameras which are capable to see 360 degrees around the car. The main forward camera covers 150m of distance. These autonomous cars can see any object within 250 meters of it’s range. Tesla autonomous cars have the ultrasonic sensors and a forward-facing radar which are very advanced technology and they help the car to see through heavy rain and fog. This technology will help prevent road accidents during extreme weathers. Another impressive addition of the new Tesla cars is the neural net for visibility.
Tesla Motors Incorporated, an American company that designs, produces, and sells electric vehicles and their electric components, has become one of the fastest growing car companies in recent history. The company’s main goal was to start creating electric vehicles that were accessible and affordable to the public. Founded in 2003 and taking off successfully by 2009, Tesla Motors started selling the first mass-produced vehicle to use lithium-ion battery cells and hold a range of greater than 200 miles on just one charge. Along with building their own electric vehicle models, Tesla also builds electric powertrain components for vehicles from other automakers including cars such as the Toyota RAV4 electric vehicle. Tesla has begun to maximize
Two parameters define Tesla’s industry competitive environment: what Tesla is today and what Tesla hopes to become in the near future. Today Tesla delivers an EV in the high-end luxury market ($70k+), but plans to deliver an affordable ($35K) small sized sedan in the next few years (Kaufman, 2015). The differences between Tesla’s current and future plans affect the threats and opportunities for potential entrants, industry competitors, and buyers in the near term and long term.
Tesla Motors can design really good cars. The Model S won the 2013 Motor Trend's Car of the Year award, which is a competition that began in 1949, and the Model S might be the safest car ever according to crash tests.