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Tesla explores safer battery production with novel DCM recovery system patent

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In what appears to be yet another step towards its goal of operating the safest car factory in the industry, Tesla has been granted a patent that could pave the way for a safer process in battery production. Published today, the electric car maker’s recent patent describes a system to treat and recycle Dichloromethane (DCM), which is among the materials used in the production of electric car batteries.

DCM is utilized in a variety of industrial processes, particularly in chemical plastic welding, wherein softened plastic pieces or surfaces are welded together. The material is also used to soften plastic sheets for stretching or shaping, and as a solvent to remove unwanted compounds. In Tesla’s case, DCM is among the materials used in the forming of a separator base film for an electric car’s battery system. While DCM is invaluable in manufacturing, though, the material carries some health risks.

Dichloromethane is the least toxic among the simple chlorohydrocarbons, but its high volatility makes it an inhalation hazard nonetheless. Prolonged skin contact with DCM could also result in the material dissolving some of the skin’s fatty tissues, causing irritation or chemical burns. With these risks in mind, the manufacturing industry employs ways to recover DCM. Tesla notes that current systems for DCM treatment and recovery are capital intensive, particularly since the process involves expensive components such as activated carbon beds, condensers, steam boilers and distribution systems, density separation vessels, and waste water treatment systems.

Tesla’s diagrams outlining its Dichloromethane recovery system. [Credit: US Patent Office]

Tesla describes conventional DCM treatment systems as follows:

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“The DCM itself may then be removed through a heating and/or evaporation process with the exhaust collected. This exhaust containing DCM is then combined with the exhaust from other tools and systems used in the manufacturing process. The combined exhaust may then be fed to a recovery plant to recover DCM. In the recovery plant, the waste exhaust stream is typically treated with activated carbon. This scrubbing process requires high capital expenditure (many expensive components), high operating cost (extensive steam and cooling water consumption which accounts for >20% of total process cost), large footprint requirements, and large amounts of waste water that need to be processed. In order to address these cost and environmental-remediation issues, an improved process for the removal of DCM from exhaust streams is needed.”

Tesla’s take on DCM treatment and recovery utilizes a wet scrubber and a density separator vessel as key components of the system. The wet scrubber in Tesla’s patent has a scrubbing chamber, where water is utilized to scrub the waste exhaust stream containing the DCM. Tesla notes that the wet scrubber could adopt a variety of designs to remove DCM from the waste exhaust stream, including a venturi scrubber design, a condensation scrubber design, an impingement-plate scrubber design, or a packed bed tower design, among others.

Tesla’s use of a density separator vessel is described in the following section from the patent.

“The density separator vessel has an inlet to receive the liquid water and DCM mixture, an outlet to expel DCM, and an outlet to expel waste water. The DCM may be routed back to the industrial process for reuse and/or collected for later use. The waste water may be routed back to the wet scrubber, as shown along (the) waste water return loop. Waste water may also or alternately be routed to waste water treatment system for processing for subsequent treatment by (the) waste water treatment system.

“Typically, a large portion of the waste water is returned to the wet scrubber via (the) waste water return loop and a small portion of the waste water is treated by the waste water treatment system. Even though the waste water may contain small amounts of DCM, the waste water will still retain its ability to scrub the exhaust containing DCM. An advantage of the wet scrubber over the activated carbon beds is that all or most of the water used by the wet scrubber is the waste water from the density separator vessel, resulting in substantial savings of water and energy, and resultantly, substantial cost savings.”

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Tesla states that compared to more traditional exhaust treatment systems, the DCM treatment and recovery model outlined in its patent effectively eliminates the use of steam and cooling, while also reducing the amount of throughput needed by a waste water system. With these efficiencies in mind, Tesla notes that it could reduce capital expenditures and operating costs “for the same amount of DCM processed processing.” The increased simplicity of the system and reduced airflow rates are expected to help the company get more savings in both capital expenditures and operating costs as well.

More than a way to optimize its operations, Tesla’s recent patent is also a notable way for the company to keep its battery production lines safer for its employees. Such a system would definitely be invaluable for the company, particularly as Tesla is now preparing the Model 3 for a global rollout. With the Model 3 ramp ever-expanding, and with high-volume vehicles like the Model Y and possibly the Tesla pickup truck in the pipeline, optimizations such as a better DCM treatment and recovery system are all but necessary.

Tesla’s recently published patent on its DCM treatment system could be accessed here.

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 investors will be shocked by Jim Cramer’s latest assessment

Jim Cramer is now speaking positively about Tesla, especially in terms of its Robotaxi performance and its perception as a company.

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Credit: CNBC Television/YouTube

Tesla investors will be shocked by analyst Jim Cramer’s latest assessment of the company.

When it comes to Tesla analysts, many of them are consistent. The bulls usually stay the bulls, and the bears usually stay the bears. The notable analysts on each side are Dan Ives and Adam Jonas for the bulls, and Gordon Johnson for the bears.

Jim Cramer is one analyst who does not necessarily fit this mold. Cramer, who hosts CNBC’s Mad Money, has switched his opinion on Tesla stock (NASDAQ: TSLA) many times.

He has been bullish, like he was when he said the stock was a “sleeping giant” two years ago, and he has been bearish, like he was when he said there was “nothing magnificent” about the company just a few months ago.

Now, he is back to being a bull.

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Cramer’s comments were related to two key points: how NVIDIA CEO Jensen Huang describes Tesla after working closely with the Company through their transactions, and how it is not a car company, as well as the recent launch of the Robotaxi fleet.

Jensen Huang’s Tesla Narrative

Cramer says that the narrative on quarterly and annual deliveries is overblown, and those who continue to worry about Tesla’s performance on that metric are misled.

“It’s not a car company,” he said.

He went on to say that people like Huang speak highly of Tesla, and that should be enough to deter any true skepticism:

“I believe what Musk says cause Musk is working with Jensen and Jensen’s telling me what’s happening on the other side is pretty amazing.”

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Tesla self-driving development gets huge compliment from NVIDIA CEO

Robotaxi Launch

Many media outlets are being extremely negative regarding the early rollout of Tesla’s Robotaxi platform in Austin, Texas.

There have been a handful of small issues, but nothing significant. Cramer says that humans make mistakes in vehicles too, yet, when Tesla’s test phase of the Robotaxi does it, it’s front page news and needs to be magnified.

He said:

“Look, I mean, drivers make mistakes all the time. Why should we hold Tesla to a standard where there can be no mistakes?”

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It’s refreshing to hear Cramer speak logically about the Robotaxi fleet, as Tesla has taken every measure to ensure there are no mishaps. There are safety monitors in the passenger seat, and the area of travel is limited, confined to a small number of people.

Tesla is still improving and hopes to remove teleoperators and safety monitors slowly, as CEO Elon Musk said more freedom could be granted within one or two months.

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Investor's Corner

Tesla gets $475 price target from Benchmark amid initial Robotaxi rollout

Tesla’s limited rollout of its Robotaxi service in Austin is already catching the eye of Wall Street.

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Credit: Tesla

Venture capital firm Benchmark recently reiterated its “Buy” rating and raised its price target on Tesla stock (NASDAQ: TSLA) from $350 to $475 per share, citing the company’s initial Robotaxi service deployment as a sign of future growth potential.

Benchmark analyst Mickey Legg praised the Robotaxi service pilot’s “controlled and safety-first approach,” adding that it could help Tesla earn the trust of regulators and the general public.

Confidence in camera-based autonomy

Legg reiterated Benchmark’s belief in Tesla’s vision-only approach to autonomous driving. “We are a believer in Tesla’s camera-focused approach that is not only cost effective but also scalable,” he noted. 

The analyst contrasted Tesla’s simple setup with the more expensive hardware stacks used by competitors like Waymo, which use various sophisticated sensors that hike up costs, as noted in an Investing.com report. Compared to Tesla’s Model Y Robotaxis, Waymo’s self-driving cars are significantly more expensive.

He also pointed to upcoming Texas regulations set to take effect in September, suggesting they could help create a regulatory framework favorable to autonomous services in other cities.

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“New regulations for autonomous vehicles are set to go into place on Sept. 1 in TX that we believe will further help win trust and pave the way for expansion to additional cities,” the analyst wrote.

https://twitter.com/herbertong/status/1938287117441855616?s=10

Tesla as a robotics powerhouse

Beyond robotaxis, Legg sees Tesla evolving beyond its roots as an electric vehicle maker. He noted that Tesla’s humanoid robot, Optimus, could be a long-term growth driver alongside new vehicle programs and other future initiatives.

“In our view, the company is undergoing an evolution from a trailblazing vehicle OEM to a high-tech automation and robotics company with unmatched domestic manufacturing scale,” he wrote.

Benchmark noted that Tesla stock had rebounded over 50% from its April lows, driven in part by easing tariff concerns and growing momentum around autonomy. With its initial Robotaxi rollout now underway, the firm has returned to its previous $475 per share target and reaffirmed TSLA as a Benchmark Top Pick for 2025.

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Tesla blacklisted by Swedish pension fund AP7 as it sells entire stake

A Swedish pension fund is offloading its Tesla holdings for good.

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tesla
(Credit: Tesla)

Tesla shares have been blacklisted by the Swedish pension fund AP7, who said earlier today that it has “verified violations of labor rights in the United States” by the automaker.

The fund ended up selling its entire stake, which was worth around $1.36 billion when it liquidated its holdings in late May. Reuters first reported on AP7’s move.

Other pension and retirement funds have relinquished some of their Tesla holdings due to CEO Elon Musk’s involvement in politics, among other reasons, and although the company’s stock has been a great contributor to growth for many funds over the past decade, these managers are not willing to see past the CEO’s right to free speech.

However, AP7 says the move is related not to Musk’s involvement in government nor his political stances. Instead, the fund said it verified several labor rights violations in the U.S.:

“AP7 has decided to blacklist Tesla due to verified violations of labor rights in the United States. Despite several years of dialogue with Tesla, including shareholder proposals in collaboration with other investors, the company has not taken sufficient measures to address the issues.”

Tesla made up about 1 percent of the AP7 Equity Fund, according to a spokesperson. This equated to roughly 13 billion crowns, but the fund’s total assets were about 1,181 billion crowns at the end of May when the Tesla stake was sold off.

Tesla has had its share of labor lawsuits over the past few years, just as any large company deals with at some point or another. There have been claims of restrictions against labor union supporters, including one that Tesla was favored by judges, as they did not want pro-union clothing in the factory. Tesla argued that loose-fitting clothing presented a safety hazard, and the courts agreed.

tesla employee

(Photo: Tesla)

There have also been claims of racism at the Fremont Factory by a former elevator contractor named Owen Diaz. He was awarded a substantial sum of $137m. However, U.S. District Judge William Orrick ruled the $137 million award was excessive, reducing it to $15 million. Diaz rejected this sum.

Another jury awarded Diaz $3.2 million. Diaz’s legal team said this payout was inadequate. He and Tesla ultimately settled for an undisclosed amount.

AP7 did not list any of the current labor violations that it cited as its reason for

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