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Dissecting Tesla Model 3’s 2170 lithium ion battery cell, what’s inside?

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A teardown video featuring Tesla Model 3’s 2170 lithium-ion battery cell was recently uploaded on YouTube, showing the components of the cylindrical cell and how it stacks up against the Model S and Model X’s 18650 battery cell.

Aries RC, a channel dedicated to battery improvements in the remote control aircraft market, indicated that they acquired a 2170 lithium-ion cell from Tesla’s Gigafactory in Nevada.  The host noted that the first thing he did was to connect the battery to a resistor, in order to completely drain the cell. Next, he made a cut at the positive terminal of the battery unit to expose a plastic dielectric barrier on the cell. This barrier is utilized by Tesla as a means to prevent the jelly roll inside from physically touching the top of the battery, which would cause a short circuit. As noted by the YouTube channel’s host, the negative terminal of the 2170 lithium-ion cell also features a similar dielectric barrier.

The Model 3’s 2170 cell features a thin layer of insulation on its interior, which, according to the RC enthusiast, is an outer layer of material that protects the cell wall’s integrity during a thermal runaway. In instances when the lithium-ion cell does heat up, however, Tesla has implemented a safety system in the form of three small cooling holes at the top of the battery. These small holes are about 0.5 mm wide, and are designed to vent out gases when the cell reaches high temperatures.

The jelly roll of the 2170 battery is wrapped in a copper sheet, which acts as a ground for the battery. A grounding strip is also attached to the copper strip using tap welding, which, according to the YouTube channel’s host, is particularly impressive, since tap welding is notoriously difficult to accomplish on thin pieces of metal.

The jelly roll of the Model 3’s battery cell features a lithium-nickel-cobalt-aluminum oxide that’s responsible for storing energy in the battery. Fully unrolled, the strip fitted with the compound measured roughly 32 inches long, roughly a third longer than the strip in Tesla’s 18650 battery, which is roughly 24 inches long.

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RELATED: Watch this Tesla Model S battery teardown performed by veteran EV modders

As could be seen in a side-by-side comparison of the jelly rolls of the 2170 and 18650 cells, Tesla’s newest form factor 2170 cell features a roll that is significantly longer and thicker than the latter. Overall, the YouTube host suggested that Tesla seems to be accurate in its estimates that the 2170 cell carries roughly 30 percent more charge than the 18650 lithium-ion cell in the Model S and X.

Tesla uses thousands of 2170 cells to enable its mass market Long Range Model 3 to travel up to 310 miles on a single charge. Produced in partnership with Panasonic at the Nevada Gigafactory, Tesla’s 2170 lithium-ion battery modules proved to be one of the sources of the Model 3’s production bottlenecks last year. As revealed by recent building permits, however, Tesla is currently conducting large-scale improvements to the Gigafactory, aimed at automating its battery module production line.

Apart from the Model 3, Tesla also uses its 2170 lithium-ion cell for its Powerpack and Powerwall battery solutions. As confirmed by Tesla CEO Elon Musk through Twitter, however, the 2170 cells will not be making their way to the Model S and X, at least as of writing. 

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Simon is an experienced automotive reporter with a passion for electric cars and clean energy. Fascinated by the world envisioned by Elon Musk, he hopes to make it to Mars (at least as a tourist) someday. For stories or tips--or even to just say a simple hello--send a message to his email, simon@teslarati.com or his handle on X, @ResidentSponge.

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Tesla’s Giga Berlin director responds to anti-Musk criticism

Tesla’s Gigafactory Berlin Director weighs in on Elon Musk, sales in Germany, and more: “We focus on what we do best”

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Following Tesla’s third anniversary of the opening of its plant in Grünheide, Germany, Tesla’s head of manufacturing for the facility has responded to questions about Elon Musk’s recent political alignment with U.S. President Donald Trump, a potential trade war, struggling sales in Germany, and several other topics.

Andre Thierig, Senior Director of Tesla’s Gigafactory Berlin, spoke in an interview with German news outlet the Frankfurter Allgemeine this week, noting that the electric vehicle (EV) maker isn’t concerned about the recent political climate surrounding Musk and Trump. Rather, Thierig echoes a goal regularly stated by some of Tesla’s top executives and designers—that the company is simply hyper-focused on making great vehicles.

“We as a company and even more so as a factory location have never positioned ourselves politically,” Thierig said, as translated from German, when asked if the politicization of Musk was harming the brand or factory. “We focus on what we do best, namely to build cars, and very good and very many. For us, this is about production at the site and not in politics. We can separate that well.”

The interviewer also asked about the arson attacks from environmental activists last March, whether or not Tesla is expecting more situations like that, and if the company has taken any measures to increase security given the recent uptick in vandalism and protests worldwide.

Thierig notes that Giga Berlin has “further improved [its] network for sharing relevant information in order to be able to able to respond more quickly” to such attacks. He also says that employees on-site would take action if necessary.

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READ MORE ON TESLA GERMANY: Tesla Giga Berlin ramping to optimum production capacity: plant manager

Regarding Tesla’s decline in February sales in Germany, Thierig points to the shift to producing the new refreshed Model Y from the legacy version, which required the factory to shut down production for a few days. He also notes that he can’t directly comment on how many pre-orders Tesla received for the new Model Y, pointing out that his team and the factory were focused on production, instead leaving sales up to the sales division.

“We in the Gigafactory do not sell, we produce,” Thierig explains. “The sales figures are the responsibility of our sales organization. However, we know our production figures and our production planning, and we are currently moving production further high. Our delivery locations here and on the airport site in Neuhardenberg are relatively empty, so the cars are quickly entering the market.”

When asked if he was concerned about incoming tariffs from the Trump administration, Thierig says that the factory increased localization of suppliers with the recent switch to the new Model Y, adding that 92 percent of components for the EV now come from somewhere in Europe.

“This makes us even more resilient to disturbances in world trade,” he adds. “In addition, we have a high level of vertical integration at the site, which has already paid off in recent years. Neither the turbulence in the supply chains during the corona pandemic nor the chip crisis or the war in Ukraine have led to production disruptions in our country.”

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The interview also touches on Giga Berlin’s long-awaited expansion plans, recent criticism from union IG Metall, what he expects from the incoming federal government, and how he believes that bureaucracy needs to be reduced in the country, among many other topics still.

Thierig has been with Tesla at Giga Berlin since August 2020, first working as a paint manager, before being promoted to Manufacturing Director and subsequently to Senior Director for the factory in general. Prior to that, Thierig was a 19-year veteran with Ford’s German operations, primarily working in paint engineering.

Tesla shares reservations about Giga Berlin’s revised water contract

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U.S. Secret Service in talks for armored cars with this automaker

The Secret Service says it’s still too early to know the future of a potential deal for these “highly-advanced vehicles.”

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Credit: Jeffrey Sauger (via GM)

The U.S. Secret Service has entered early discussions with one automaker about the potential supply of armored SUVs, as announced by the agency this week.

In a post on X on Friday, the Secret Service account posted that Director Sean Curran recently met with executives from General Motors (GM) to discuss a potential next-generation of armored SUVs. The post also included photos of a Cadillac Escalade SUV, along with a few of executives talking about and showing off hardware from the next-gen platform.

“Countering evolving threats require us to constantly explore new innovations and improvements to our armored fleet of protective vehicles,” the account wrote in the post. “Director Sean Curran met with GM executives to discuss advancements that could benefit the next generation of armored SUVs.”

Credit: U.S. Secret Service | X

Credit: U.S. Secret Service | X

Currently, U.S. President Donald Trump typically utilizes an armored Chevy Suburban to get around, and the Secret Service said that it isn’t yet clear when such a next-gen “presidential limousine” could be added to the fleet. The news also comes after GM CEO Mary Barra met with Trump last week, reportedly also to discuss armored SUVs.

READ MORE ON U.S. GOVERNMENT: This former Tesla engineer now heads a federal tech department

“We are too far out to speak to any specific costs or dates,” one Secret Service spokesperson told Reuters. “Our engineering, protective operations and technical security teams work for years to develop the state-of-the-art framework that is used to produce these highly advanced vehicles.”

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Many in the thread also said that the Tesla Cybertruck could be a good option for the Secret Service, coming weeks after the U.S. State Department apparently canceled a potential $400 million Cybertruck order after it was widely reported on. State Department officials have since said that the figure listed in documents for the deal, which was first initiated under the Biden administration, were simply an estimate, and the Cybertruck has been removed from the broadly reported procurement list.

CEO Elon Musk also responded to the reports on X, suggesting that they were either misunderstood or false, noting that he was “pretty sure Tesla isn’t getting $400 million.”

“No one mentioned it to me, at least,” Musk added in the post.

The Cybertruck features a stainless steel exterior that has been touted by Tesla as being able to withstand bullets and other potential attacks. Tesla Cybertrucks have also been rolling out to some U.S. Police Departments in recent months, many featuring armored tune-ups from Unplugged Performance’s Up.Fit government and military fleet division.

Irvine PD unveils Tesla Cybertruck DARE program fleet unit

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Tesla Powerwalls to help expand Virtual Power Plant in Colorado

Colorado’s Virtual Power Plant program is about to get even bigger, with the help of Tesla’s Powerwalls.

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Tesla’s Powerwalls are set to help expand a Virtual Power Plant (VPP) program in Colorado, as an announcement this week notes that the company will be partnering with two local energy providers.

In a press release on Thursday, utility provider Xcel Energy and resource management company Itron announced a partnership with Tesla to help expand the existing VPP in Colorado, dubbed the Renewable Battery Connect program. Itron will integrate its IntelliFLEX platform with Tesla’s Powerwall management system, and the partners plan to increase the number of batteries that can be used during times of peak demand, as managed by Xcel.

The IntelliFLEX Aggregator Distributed Energy Resource Management System (DERMS) is designed to let energy providers localize the management of distributed batteries, utilizing a combination of residential battery storage, solar energy, electric vehicle (EV) chargers and other management systems to help balance grid energy more efficiently.

“Our Renewable Battery Connect program creates a new VPP in Colorado and we’re proud to work with Itron and Tesla, who have proven to be trusted industry partners and align with our goals to strengthen the energy grid while maintaining reliability and advancing renewable energy,” said Emmett Romine, Xcel’s VP of Customer Energy and Transportation Solutions. “This collaboration will deliver renewable, solar energy when our customers need it most.”

READ MORE ON TESLA POWERWALLS: Tesla partners up to expand Virtual Power Plant program in Texas

Itron also says the IntelliFLEX system currently helps facilitate around three million distributed energy resource devices for 30 different utilities across the U.S. The company also says the tool will give Xcel more power to manage customers’ residential batteries to help stabilize local grids.

“Integrating our IntelliFLEX solution with Tesla Powerwall demonstrates a shared vision with a leading technology partner who is at the forefront of creating electrification solutions,” said Don Reeves, SVP of Outcomes at Itron. “Through this collaboration, we are excited to bring new capabilities to Xcel Energy as they embark on its energy transition journey.”

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Tesla’s Powerwall home batteries have been utilized in markets around the world, effectively letting owners store and sell stored energy back to the electrical grid in times of peak demand, outages, and other peak use cases. This kind of distributed battery system is being piloted or run in a number of U.S. states, including California, Texas, and Massachusetts, and in a few other countries and territories.

The company currently builds Powerwalls at its Gigafactory in Nevada, and the facility in November celebrated building over 1,000 of the home batteries in a single day as it continues to ramp production. In October, Tesla also said that it had over 100,000 Powerwalls participating in its VPP programs worldwide.

Tesla shows off solar, Powerwall-backed display at Giga Berlin

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