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Tesla’s 4680 cell production process outlined in Giga Berlin’s revised filings

Credit: Tesla, Tobias Lindh/Twitter

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Tesla’s revised documents for Gigafactory Berlin have been posted online, and they are a treasure trove of information. The documents provided some new details about Tesla’s planned 4680 battery plant in Gigafactory Berlin, which Elon Musk noted is on track to be one of the world’s largest battery production facilities. They also outlined how Tesla’s 4680 cells are produced. 

While sections of the filing pertaining to the planned 4680 battery cell plant in Giga Berlin were blacked out due to sensitive information that could not be made public, the documents show some important tidbits about the upcoming facility. This includes the facility’s cell production operations over four floors, with anode and cathode production on the first floor and tabless cell production on the third floor. The battery plant is massive, requiring large foundations similar to Gigafactory Berlin’s Phase 1 zone. 

Most importantly, Tesla also submitted a simplified diagram of its 4680 battery cell production process, though most of the diagram was blacked out in the revised filing’s public release. However, the company provided a brief overview of how its new battery cell will be produced in the upcoming facility (roughly translated through Google Translate). 

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“The battery the Gigafactory Berlin requires special systems and process steps. The anodes and cathodes consist of coated current collector foils. Copper is used as the material for the anode foil and aluminum is used for the cathode foil. The anode and cathode components are manufactured in mixed processes (A020-01 and A020-02), which only use materials in powder form. The new materials used are tested and approved in our own laboratory (A020-11). 

“In order for the powder coating to adhere to the two films, they must first be pre-coated with a thin layer of adhesive (substrate) (A020-03 and A020-04). This substrate is delivered in containers. The pre-coating is necessary because a dry coating with powder takes place. After the anode and cathode components have been mixed, they are applied as a coating to the respective substrate-coated film in order to establish electrical contact (A020-05 and A020-06). The current collector foils, coated with the anode or cathode components, result in the finished anode or cathode. 

The revised filings also provided a general idea of how Tesla’s tabless cell production works. Among these is the fact that the finished 4680 cells would be subjected to 10 days’ worth of curing after their formation. 

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“The anode or cathode is then cut to the required lengths with a laser in the “tabless process” (A020-08). The anode, the cathode and the separator are alternately placed one on top of the other and rolled up into a roll. This roller is then inserted into a metal housing, which is manufactured from steel rollers in a die-cutting and deep-drawing process (A020-07). In the assembly area, the final assembly and filling of the cell takes place with small amounts of electrolyte (approx. 10% of the cell weight) (A020-09). 

“The electrolyte is absorbed by the electrode coatings and enables the lithium ions to move back and forth between the anode and cathode. The housing is then closed with a lid in a welding process. The last step is the formation (A020-10) of the cell. In the formation process, the cell is electrically started up by charging and discharging it under different temperature conditions. The finished cell remains in this area for approx. 10 days and is then put to further use. The cells produced are subjected to random quality control in our own laboratory (A020-11).” 

A link to Tesla’s filings for Gigafactory Berlin could be found here

Do you have anything to share with the Teslarati Team? We’d love to hear from you, email us at tips@teslarati.com.

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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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Cantor Fitzgerald maintains Tesla (TSLA) ‘Overweight’ rating amid Q2 2025 deliveries

Cantor Fitzgerald is holding firm on its bullish stance for the electric vehicle maker.

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Credit: Tesla China

Cantor Fitzgerald is holding firm on its bullish stance for Tesla (NASDAQ: TSLA), reiterating its “Overweight” rating and $355 price target amidst the company’s release of its Q2 2025 vehicle delivery and production report. 

Tesla delivered 384,122 vehicles in Q2 2025, falling below last year’s Q2 figure of 443,956 units. Despite softer demand in some countries in Europe and ongoing controversies surrounding CEO Elon Musk, the firm maintained its view that Tesla is a long-term growth story in the EV sector.

Tesla’s Q2 results

Among the 384,122 vehicles that Tesla delivered in the second quarter, 373,728 were Model 3 and Model Y. The remaining 10,394 units were attributed to the Model S, Model X, and Cybertruck. Production was largely flat year-over-year at 410,244 units.

In the energy division, Tesla deployed 9.6 GWh of energy storage in Q2, which was above last year’s 9.4 GWh. Overall, Tesla continues to hold a strong position with $95.7 billion in trailing twelve-month revenue and a 17.7% gross margin, as noted in a report from Investing.com.

Tesla’s stock is still volatile

Tesla’s market cap fell to $941 billion on Monday amid volatility that was likely caused in no small part by CEO Elon Musk’s political posts on X over the weekend. Musk has announced that he is forming the America Party to serve as a third option for voters in the United States, a decision that has earned the ire of U.S. President Donald Trump. 

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Despite Musk’s controversial nature, some analysts remain bullish on TSLA stock. Apart from Cantor Fitzgerald, Canaccord Genuity also reiterated its “Buy” rating on Tesla shares, with the firm highlighting the company’s positive Q2 vehicle deliveries, which exceeded its expectations by 24,000 units. Cannacord also noted that Tesla remains strong in several markets despite its year-over-year decline in deliveries.

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Tesla Sweden responds to car magazine’s claims that Model 3 has deficient brakes

The company stated that it would be examining the two Model 3s that were used in the magazine’s test.

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Credit: Tesla Asia/X

Tesla Sweden has responded to a car magazine’s claims that the new Model 3 sedan has “deficient” brakes. The all-electric sedan was subjected to the publication’s tests, and its braking distance was reportedly found to be lacking. 

The car magazine’s tests

As noted in a report from Swedish car magazine Teknikens Värld, the new Model 3 Long Range’s braking distance proved subpar when it was tested, with the vehicle reportedly having a braking distance of a whopping 133.2 feet (40.6 meters). The magazine claimed that it repeated the test with another Model 3, and its results were only 5 feet (1.5 meters) better. 

The magazine noted that this was unacceptable since an acceptable braking distance is 124 feet (28 meters), which also happens to be the Model 3’s braking distance when it was tested by Edmunds in the United States. The publication also stated that the Volkswagen ID.7 Tourer, which is equipped with drum brakes at the rear, had a braking distance that’s 16 feet (5 meters) shorter in its tests. 

Tesla Sweden’s response

Tesla Sweden responded to the car magazine’s claims, stating that the all-electric sedan’s alleged braking performance was not consistent with the company’s data, nor does it align with the Model 3’s safety ratings. The company also noted that it would be examining the two Model 3s that were used in the magazine’s test. 

“In the latest braking tests with Model 3, which were conducted by Teknikens Värld 2021, a braking distance of 36.5 meters was measured for Model 3 RWD and 36.7 meters for Model 3 Long Range AWD, so these results are not recognized or consistent with our internal tests.

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“We are examining the two specimens to find out why the braking distances differ. Safety is number one at Tesla. Model 3 comes with all safety features as standard. Independent crash safety organization Euro NCAP recently announced new crash results for cars tested in May 2025. Euro NCAP gives the upgraded Model 3 a 5 out of 5-star safety rating and an overall score of 90%, making Model 3 one of the safest vehicles tested under the latest and most stringent testing protocol ever,” Tesla Sweden stated.

Teknikens Värld digs its heels

While Tesla Sweden has responded to its allegations, the car magazine noted that it will nonetheless stand firm on its claim that the new Model 3 has deficient brakes. 

“The fact that the Model 3 previously passed the brake test is not relevant because today’s generation of the Model 3 is to be considered a new generation, as Tesla themselves often point out. Nor is the result in Euro NCAP relevant because they are different tests. We can therefore conclude that Tesla has deficient brakes on the new Model 3. It is good for everyone to know,” the car magazine wrote.

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Trump pushes back on Elon Musk’s America Party, calls third-party move ‘ridiculous’

The clash marks a notable shift in the relationship between the two former allies.

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MINISTÉRIO DAS COMUNICAÇÕES, CC BY 2.0 , via Wikimedia Commons

United States President Donald Trump sharply criticized Elon Musk’s decision to launch a new political party, calling the move “ridiculous” and dismissing it as a distraction from the two-party system. The rebuke came shortly after Musk announced the formation of the “America Party,” aimed at disrupting what he calls the entrenched Republican-Democrat “Uniparty.”

Tensions escalate between Trump and Musk

The clash marks a notable shift in the relationship between the two former allies. Musk previously headed the Department of Government Efficiency (DOGE) under Trump’s administration, a position aimed at cutting federal spending. The alliance, however, appears to have fractured over policy differences, particularly Trump’s “Big Beautiful Bill,” which Musk notes will increase the country’s debt by $5 trillion.

Speaking to reporters on Sunday before boarding Air Force One, Trump said, “It’s always been a two-party system and I think starting a third party just adds to the confusion.” Hours later, he posted on Truth Social that Musk had gone “off the rails,” accusing him of promoting an “Electric Vehicle Mandate” that would have required all Americans to switch to EVs in a short timeframe. 

Trump emphasized that his latest tax bill deliberately excluded incentives for electric vehicles, saying Americans should be free to choose gasoline-powered, hybrid, or other new technologies without federal mandates, according to a report from the BBC.

Musk outlines goals for America Party

Musk has been open about his support for ending the EV tax credit, as long as the incentives for other industries like oil and gas are removed as well.. The CEO has adopted this stance for several years. He has also not supported the idea of a mandate that forces consumers to purchase electric cars.

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Musk also stated that the newly formed America Party will focus on congressional races in 2025 and 2026, rather than fielding a presidential candidate in the near term. In his post on X, the Tesla and SpaceX CEO criticized both major parties for contributing to the national debt. He also noted that the Department of Government Efficiency’s work will be rendered useless if the US’ debt increases due to Trump’s Big Beautiful Bill.

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