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GM’s Ultium Cells battery plant under investigation over chemical spill

Credit: Ultium Cells LLC

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General Motors’ Ultium Cells LLC battery plant in Warren, Ohio, is currently under investigation by federal regulators following a chemical spill at the facility. Ultium has noted that no employees were exposed or injured due to the incident.  

The chemical spill was reported to the Occupational Safety and Health Administration (OSHA) on Monday. An investigation is underway, with OHSA set to collect details of the incident, such as Ultium Cells’ response to the spill and whether the plant’s employees are still at risk. OHSA is investigating the extent of any exposure from the spill as well. 

As per a report from The Detroit News, the slurry that spilled on the ground and around equipment in the Ultium Cells plant contained n-Methylpyrrolidone (NMP). NMP is typically used for cathode production to create a polymer that holds active and conductive battery materials. The US Environmental Protection Agency (EPA) has noted that NMP presents an “unreasonable risk” to human health, though there is no federal permissible exposure limit for the chemical under OSHA.

Greg Less, technical director at the University of Michigan Battery Lab, noted that NMP can be quite dangerous. “That stuff is pretty nasty. It’s got a lot of safety concerns with it,” he said. 

Ultium Cells has noted that mixing operations have been halted at the facility for now. The company also used a third-party company to help clean up and contain the spill. Operations at the area of the plant where the spill happened remain paused, at least until the area has been inspected and deemed safe

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Ultium spokesperson Katie Burdette, for her part, noted that the incident shows that the company has the right safety and reporting procedures in place. “We believe this incident demonstrates that we have the right safety and reporting procedures in place and our teams are sufficiently trained to follow them. We are grateful to our team members for their swift and responsive action,” Burdette said. 

The United Auto Workers (UAW), however, has expressed its disdain at the incident. In a statement about the chemical spill, UAW President Shawn Fain criticized General Motors for prioritizing Ultium Cells’ bottom line instead of its workers’ safety. 

“This is the latest in a long line of serious health and safety hazards our members have had to endure at Ultium and underscores why it is critically important that Ultium adopt the health and safety standards that generations of auto workers have fought for and won at General Motors. These accidents are preventable and manageable. Sadly, Ultium is choosing to prioritize their bottom line over human safety,” Fain said. 

Don’t hesitate to contact us with news tips. Just send a message to simon@teslarati.com to give us a heads-up. 

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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 aims to combat common Full Self-Driving problem with new patent

Tesla writes in the patent that its autonomous and semi-autonomous vehicles are heavily reliant on camera systems to navigate and interact with their environment.

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Credit: @samsheffer | x

Tesla is aiming to combat a common Full Self-Driving problem with a new patent.

One issue with Tesla’s vision-based approach is that sunlight glare can become a troublesome element of everyday travel. Full Self-Driving is certainly an amazing technology, but there are still things Tesla is aiming to figure out with its development.

Unfortunately, it is extremely difficult to get around this issue, and even humans need ways to combat it when they’re driving, as we commonly use sunglasses or sun visors to give us better visibility.

Cameras obviously do not have these ways to fight sunglare, but a new patent Tesla recently had published aims to fight this through a “glare shield.”

Tesla writes in the patent that its autonomous and semi-autonomous vehicles are heavily reliant on camera systems to navigate and interact with their environment.

The ability to see surroundings is crucial for accurate performance, and glare is one element of interference that has yet to be confronted.

Tesla described the patent, which will utilize “a textured surface composed of an array of micro-cones, or cone-shaped formations, which serve to scatter incident light in various directions, thereby reducing glare and improving camera vision.”

The patent was first spotted by Not a Tesla App.

The design of the micro-cones is the first element of the puzzle to fight the excess glare. The patent says they are “optimized in size, angle, and orientation to minimize Total Hemispherical Reflectance (THR) and reflection penalty, enhancing the camera’s ability to accurately interpret visual data.”

Additionally, there is an electromechanical system for dynamic orientation adjustment, which will allow the micro-cones to move based on the angle of external light sources.

This is not the only thing Tesla is mulling to resolve issues with sunlight glare, as it has also worked on two other ways to combat the problem. One thing the company has discussed is a direct photon count.

CEO Elon Musk said during the Q2 Earnings Call:

“We use an approach which is direct photon count. When you see a processed image, so the image that goes from the sort of photon counter — the silicon photon counter — that then goes through a digital signal processor or image signal processor, that’s normally what happens. And then the image that you see looks all washed out, because if you point the camera at the sun, the post-processing of the photon counting washes things out.”

Future Hardware iterations, like Hardware 5 and Hardware 6, could also integrate better solutions for the sunglare issue, such as neutral density filters or heated lenses, aiming to solve glare more effectively.

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Delaware Supreme Court reinstates Elon Musk’s 2018 Tesla CEO pay package

The unanimous decision criticized the prior total rescission as “improper and inequitable,” arguing that it left Musk uncompensated for six years of transformative leadership at Tesla.

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Gage Skidmore, CC BY-SA 4.0 , via Wikimedia Commons

The Delaware Supreme Court has overturned a lower court ruling, reinstating Elon Musk’s 2018 compensation package originally valued at $56 billion but now worth approximately $139 billion due to Tesla’s soaring stock price. 

The unanimous decision criticized the prior total rescission as “improper and inequitable,” arguing that it left Musk uncompensated for six years of transformative leadership at Tesla. Musk quickly celebrated the outcome on X, stating that he felt “vindicated.” He also shared his gratitude to TSLA shareholders.

Delaware Supreme Court makes a decision

In a 49-page ruling Friday, the Delaware Supreme Court reversed Chancellor Kathaleen McCormick’s 2024 decision that voided the 2018 package over alleged board conflicts and inadequate shareholder disclosures. The high court acknowledged varying views on liability but agreed rescission was excessive, stating it “leaves Musk uncompensated for his time and efforts over a period of six years.”

The 2018 plan granted Musk options on about 304 million shares upon hitting aggressive milestones, all of which were achieved ahead of time. Shareholders overwhelmingly approved it initially in 2018 and ratified it once again in 2024 after the Delaware lower court struck it down. The case against Musk’s 2018 pay package was filed by plaintiff Richard Tornetta, who held just nine shares when the compensation plan was approved.

A hard-fought victory

As noted in a Reuters report, Tesla’s win avoids a potential $26 billion earnings hit from replacing the award at current prices. Tesla, now Texas-incorporated, had hedged with interim plans, including a November 2025 shareholder-approved package potentially worth $878 billion tied to Robotaxi and Optimus goals and other extremely aggressive operational milestones.

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The saga surrounding Elon Musk’s 2018 pay package ultimately damaged Delaware’s corporate appeal, prompting a number of high-profile firms, such as Dropbox, Roblox, Trade Desk, and Coinbase, to follow Tesla’s exodus out of the state. What added more fuel to the issue was the fact that Tornetta’s legal team, following the lower court’s 2024 decision, demanded a fee request of more than $5.1 billion worth of TSLA stock, which was equal to an hourly rate of over $200,000.

Delaware Supreme Court Elon Musk 2018 Pay Package by Simon Alvarez

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Tesla Cybercab tests are going on overdrive with production-ready units

Tesla is ramping its real-world tests of the Cybercab, with multiple sightings of the vehicle being reported across social media this week.

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Credit: @JT59052914/X

Tesla is ramping its real-world tests of the Cybercab, with multiple sightings of the autonomous two-seater being reported across social media this week. Based on videos of the vehicle that have been shared online, it appears that Cybercab tests are underway across multiple states.

Recent Cybercab sightings

Reports of Cybercab tests have ramped this week, with a vehicle that looked like a production-ready prototype being spotted at Apple’s Visitor Center in California. The vehicle in this sighting was interesting as it was equipped with a steering wheel. The vehicle also featured some changes to the design of its brake lights.

The Cybercab was also filmed testing at the Fremont factory’s test track, which also seemed to involve a vehicle that looked production-ready. This also seemed to be the case for a Cybercab that was spotted in Austin, Texas, which happened to be undergoing real-world tests. Overall, these sightings suggest that Cybercab testing is fully underway, and the vehicle is really moving towards production.

Production design all but finalized?

Recently, a near-production-ready Cybercab was showcased at Tesla’s Santana Row showroom in San Jose. The vehicle was equipped with frameless windows, dual windshield wipers, powered butterfly door struts, an extended front splitter, an updated lightbar, new wheel covers, and a license plate bracket. Interior updates include redesigned dash/door panels, refined seats with center cupholders, updated carpet, and what appeared to be improved legroom.

There seems to be a pretty good chance that the Cybercab’s design has been all but finalized, at least considering Elon Musk’s comments at the 2025 Annual Shareholder Meeting. During the event, Musk confirmed that the vehicle will enter production around April 2026, and its production targets will be quite ambitious. 

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