Investor's Corner

Tesla explores safer battery production with novel DCM recovery system patent

Published

7 years ago

November 15, 2018

Simon Alvarez

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 DCM treatment system. [Credit: US Patent Office]

: A flow chart illustrating operation of an exhaust treatment system for treating a waste exhaust stream containing dichlorom ethane. [Credit: US Patent Office]

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

Tesla describes conventional DCM treatment systems as follows:

“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.”

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.

Related Topics:Elon Musk Gigafactory Tesla Tesla Model 3 Top Story

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Simon Alvarez

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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Investor's Corner

Shareholder group urges Nasdaq probe into Elon Musk’s Tesla 2025 CEO Interim Award

The SOC Investment Group represents pension funds tied to more than two million union members, many of whom hold shares in TSLA.

Published

1 day ago

August 22, 2025

Simon Alvarez

Credit: xAI/X

An investment group is urging Nasdaq to investigate Tesla (NASDAQ:TSLA) over its recent $29 billion equity award for CEO Elon Musk.

The SOC Investment Group, which represents pension funds tied to more than two million union members—many of whom hold shares in TSLA—sent a letter to the exchange citing “serious concerns” that the package sidestepped shareholder approval and violated compensation rules.

Concerns over Tesla’s 2025 CEO Interim Award

In its August 19 letter to Nasdaq enforcement chief Erik Wittman, SOC alleged that Tesla’s board improperly granted Musk a “2025 CEO Interim Award” under the company’s 2019 Equity Incentive Plan. That plan, the group noted, explicitly excluded Musk when it was approved by shareholders. SOC argued that the new equity grant effectively expanded the plan to cover Musk, a material change that should have required a shareholder vote under Nasdaq rules.

The $29 billion package was designed to replace Musk’s overturned $56 billion award from 2018, which the Delaware Chancery Court struck down, prompting Tesla to file an appeal to the Delaware Supreme Court. The interim award contains restrictions: Musk must remain in a leadership role until August 2027, and vested shares cannot be sold until 2030, as per a Yahoo Finance report.

Even so, critics such as SOC have argued that the plan does not have of performance targets, calling it a “fog-the-mirror” award. This means that “If you’re around and have enough breath left in you to fog the mirror, you get them,” stated Brian Dunn, the director of the Institute for Comprehension Studies at Cornell University.

They don’t even HAVE an investment with Tesla. They are just a political activist group using a loose relationship with a “coalition of unions” to write letters to advance an agenda that IS NOT making Tesla and AI, robotics and energy leader. Their letter does not include any…— Amy (@_SFTahoe) August 21, 2025

SOC’s Tesla concerns beyond Elon Musk

SOC’s concerns extend beyond the mechanics of Musk’s pay. The group has long questioned the independence of Tesla’s board, opposing the reelection of directors such as Kimbal Musk and James Murdoch. It has also urged regulators to review Tesla’s governance practices, including past proposals to shrink the board.

SOC has also joined initiatives calling for Tesla to adopt comprehensive labor rights policies, including noninterference with worker organizing and compliance with global labor standards. The investment group has also been involved in webinars and resolutions highlighting the risks related to Tesla’s approach to unions, as well as labor issues across several countries.

Tesla has not yet publicly responded to SOC’s latest letter, nor to requests for comment.

The SOC’s letter can be viewed below.

Nasdaq+Letter Tsla Socig Final by Simon Alvarez

Investor's Corner

Tesla investors may be in for a big surprise

All signs point toward a strong quarter for Tesla in terms of deliveries. Investors could be in for a surprise.

Published

1 week ago

August 14, 2025

Joey Klender

(Credit: Tesla)

Tesla investors have plenty of things to be ecstatic about, considering the company’s confidence in autonomy, AI, robotics, cars, and energy. However, many of them may be in for a big surprise as the end of the $7,500 EV tax credit nears. On September 30, it will be gone for good.

This has put some skepticism in the minds of some investors: the lack of a $7,500 discount for buying a clean energy vehicle may deter many people from affording Tesla’s industry-leading EVs.

Tesla warns consumers of huge, time-sensitive change coming soon

The focus on quarterly deliveries, while potentially waning in terms of importance to the future, is still a big indicator of demand, at least as of now. Of course, there are other factors, most of them economic.

The big push to make the most of the final quarter of the EV tax credit is evident, as Tesla is reminding consumers on social media platforms and through email communications that the $7,500 discount will not be here forever. It will be gone sooner rather than later.

It appears the push to maximize sales this quarter before having to assess how much they will be impacted by the tax credit’s removal is working.

Delivery Wait Time Increases

Wait times for Tesla vehicles are increasing due to what appears to be increased demand for the company’s vehicles. Recently, Model Y delivery wait times were increased from 1-3 weeks to 4-6 weeks.

This puts extra pressure on consumers to pull the trigger on an order, as delivery must be completed by the cutoff date of September 30.

Delivery wait times may have gone up due to an increase in demand as consumers push to make a purchase before losing that $7,500 discount.

More People are Ordering

A post on X by notable Tesla influencer Sawyer Merritt anecdotally shows he has been receiving more DMs than normal from people stating that they’re ordering vehicles before the end of the tax credit:

Anecdotally, I’ve been getting more DMs from people ordering Teslas in the past few days than I have in the last couple of years. As expected, the end of the U.S. EV credit next month is driving a big surge in orders.

Lease prices are rising for the 3/Y, delivery wait times are… pic.twitter.com/Y6JN3w2Gmr

— Sawyer Merritt (@SawyerMerritt) August 13, 2025

It’s not necessarily a confirmation of more orders, but it could be an indication that things are certainly looking that way.

Why Investors Could Be Surprised

Tesla investors could see some positive movement in stock price following the release of the Q3 delivery report, especially if all signs point to increased demand this quarter.

We reported previously that this could end up being a very strong rebounding quarter for Tesla, with so many people taking advantage of the tax credit.

Whether the delivery figures will be higher than normal remains to be seen. But all indications seem to point to Q3 being a very strong quarter for Tesla.

Elon Musk

Tesla bear Guggenheim sees nearly 50% drop off in stock price in new note

Tesla bear Guggenheim does not see any upside in Robotaxi.

Published

1 week ago

August 14, 2025

Joey Klender

Credit: Tesla

Tesla bear Guggenheim is still among the biggest non-believers in the company’s overall mission and its devotion to solving self-driving.

In a new note to investors on Thursday, analyst Ronald Jewsikow reiterated his price target of $175, a nearly 50 percent drop off, with a ‘Sell’ rating, all based on skepticism regarding Tesla’s execution of the Robotaxi platform.

A few days ago, Tesla CEO Elon Musk said the company’s Robotaxi platform would open to the public in September, offering driverless rides to anyone in the Austin area within its geofence, which is roughly 90 square miles large.

Tesla CEO Elon Musk confirms Robotaxi is opening to the public: here’s when

However, Jewsikow’s skepticism regarding this timeline has to do with what’s going on inside of the vehicles. The analyst was willing to give props to Robotaxi, saying that Musk’s estimation of a September public launch would be a “key step” in offering the service to a broader population.

Where Jewsikow’s real issue lies is with Tesla’s lack of transparency on the Safety Monitors, and how bulls are willing to overlook their importance.

Much of this bullish mentality comes from the fact that the Monitors are not sitting in the driver’s seat, and they don’t have anything to do with the overall operation of the vehicle.

Musk also said last month that reducing Safety Monitors could come “in a month or two.”

Instead, they’re just there to make sure everything runs smoothly.

Jewsikow said:

“While safety drivers will remain, and no timeline has been provided for their removal, bulls have been willing to overlook the optics of safety drivers in TSLA vehicles, and we see no reason why that would change now.”

He also commented on Musk’s recent indication that Tesla was working on a 10x parameter count that could help make Full Self-Driving even more accurate. It could be one of the pieces to Tesla solving autonomy.

Jewsikow added:

“Perhaps most importantly for investors bullish on TSLA for the fleet of potential FSD-enabled vehicles today, the 10x higher parameter count will be able to run on the current generation of FSD hardware and inference compute.”