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Rivian patent application hints at 900V fast charging capabilities

The Rivian R1T. | Image: Dacia J. Ferris/Teslarati

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A recently published Rivian patent application titled “Configurable Battery Pack for Fast Charge” describes a method of switching between battery pack connection types to allow for both 450V and 900V fast charging without the need for specialized components. The invention was filed in both the US and internationally, and both applications just published today as US Patent Publication No. 2019/0126761 A1 and International Publication No. WO/2019/084507 A1.

Rivian’s application sets out to solve three specific issues with electric vehicle battery charging. First, increases in charging rates typically require more expensive parts that are rated for the higher current requirements. Second, electronic devices operated while a battery is charging may be impacted via increased voltage when a battery’s charging rate is increased. Finally, when a fault occurs in a battery module, a battery system often needs to be completely disconnected from any loads or the charging voltage must be changed.

The basic concept of the application purports to solve the above-referenced problems. As described, the invention claims that battery modules connected in parallel achieve a targeted maximum high voltage for an electric load (such as 450V), but when connected in series that voltage can be doubled (900V). Details of why this is advantageous are explained in the application as follows:

A configurable battery system allows the techniques of [this invention] to be applied to an electric vehicle…to more fully utilize a battery charger’s potential [where] it is desirable to achieve a particular charging target. For example, a charging target of 150 kW at 450 V may require a current of 334 A…[and] components may need to be sourced to handle up to 400 A continuously to handle the charging….If a battery system were able to take advantage of charging at 900 V, the charging target of 150 kW could be achieved at just 167 A, which may allow for more numerous, better quality, or cheaper options for charging components. For example, a current of 167 A may allow different hardware to be used than if the current were nearer to 400 A.

The application also includes a battery management system to determine which connection should be used at a given point and switch the connection type accordingly. This same management system is also used to detect faults in the system while charging and use the switching capability to handle them accordingly rather than disconnecting any battery loads.

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The US application for this invention was filed June 8, 2018 and thus has not yet been examined. However, in the international version, an examiner has already searched for related inventions based on the first 10 claims of Rivian’s application. These claims only describe “a configurable battery system in which connection of two batteries can be switched between a series and a parallel connection”, which is not considered novel on its own.

This kind of finding is not uncommon for applications undergoing the international filing process and will be further addressed once filed in specific countries. Three other inventions were determined to be present in the application which will likely be incorporated with the first ten as the invention’s proceedings continue.

Rivian Battery Lab Pack Assembly | Image: Rivian

Rivian aims to be the leading expert on battery technology, and patent applications such as this one are a nod towards that innovation goal. The Michigan-based all-electric car maker runs a battery lab in Irvine, California where it has picked up several engineers from renowned supercar brand McLaren. This talent pool includes hypercar engineer Richard Farquhar who is their VP of Propulsion, leading Rivian’s battery and powertrain development.

Currently, each Rivian battery module holds 864 cells, stacked evenly on top of one another, with a thin 7mm aluminum plate with liquid coolant in between. In addition to connection testing, the company uses machine learning to adjust battery cell settings to build predictive models and tune the cells based on situations that may be encountered, such as weather conditions.

Altogether, Rivian’s aim to achieve a level of battery technology that’s reliable and optimal for the electric outdoor adventure branding it has embraced looks to be moving in a promising direction.

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Accidental computer geek, fascinated by most history and the multiplanetary future on its way. Quite keen on the democratization of space. | It's pronounced day-sha, but I answer to almost any variation thereof.

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Tesla eyes two new states for Robotaxi

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Credit: @TerrapinTerpene/X

Tesla has officially shown that it is eyeing two new states for Robotaxi operation in the U.S., as it hopes to add the new areas to its ever-growing list of places where the suite is either active or in the testing phase.

Tesla first launched its Robotaxi suite in Austin, Texas, in late June. It expanded the suite to the San Francisco Bay Area just a month later. Since then, it has not launched any public rides in any other states, but it has gained several approvals for early testing.

Tesla officially launches Robotaxi service with no driver

In preparation for operation in new states, Tesla routinely lists job postings on its Careers website, which helps align potential employees with opportunities ahead of regulatory approvals. This is a strategy that allows Tesla to start operations immediately upon licensing for testing.

Tesla started hiring Vehicle Operators for Autopilot in Arizona and Nevada months before the company gained any sort of approvals from state governments for Robotaxi. However, those approvals eventually came in the form of testing licenses, which allow the company to perform validation ahead of its public launch.

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Tesla begins validating Robotaxi in a new area, hinting at expansion

Now, Tesla has posted job listings for Vehicle Operators for Autopilot in two new states: Colorado and Illinois. The Colorado job listing is located in Aurora, a suburb of Denver. Tesla is looking for Robotaxi operators in Chicago as well.

These postings hint toward Tesla’s continuing efforts to expand Robotaxi to new places. Earlier this year, CEO Elon Musk said the company would like to have Robotaxi available to at least half of the U.S. population.

It has expanded significantly since its initial launch in late June, but it is still a far way off from where Tesla would like it to be by year’s end.

So far, Tesla has job listings for Autopilot Vehicle Operators in Arizona, California, Texas, Florida, Colorado, Nevada, and Illinois.

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Tesla launched an ad for Elon Musk’s pay package on Paramount+

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Credit: Tesla

Tesla’s advertising strategy has taken a drastic turn as the company’s upcoming Shareholder Meeting will feature perhaps the most crucial vote in its history: the approval of CEO Elon Musk’s new pay package.

For years, the issue of Tesla’s advertising and marketing strategy has been a major point of conversation for investors in fans. It seems to be split right down the middle, with half wanting Tesla to set aside some money for advertising. The other half, just the opposite.

Tesla has been transparent that the money it would spend on advertising, marketing, and public relations is better set aside for the development of future products.

However, it has recently adopted a different tone in advertising, pushing some commercials on social media platforms like X and Instagram.

For the first time, an ad was seen on streaming services like Paramount+, but it wasn’t promoting Tesla’s products directly. Instead, it was more of a message for shareholders to vote on Musk’s pay package, something Tesla feels is a necessity:

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“The future of Tesla is in your hands,” the ad reads at the end. It seems as if Tesla is taking whatever steps it needs to accomplish the task of getting Musk a new pay package and retaining him as its CEO.

On September 5, Tesla officially outlined its plans for a CEO Performance Award for Musk. It would require him to lift Tesla’s market capitalization to about $8.5 trillion, up from the $1.36 trillion it sits at today.

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Elon Musk’s new pay plan ties trillionaire status to Tesla’s $8.5 trillion valuation

It is obvious that Tesla is really hoping to get the pay package passed and is willing to shift some of its budget to encourage shareholders to vote.

However, there are some interesting perspectives on the move, and it’s sort of strange to see Tesla not advertising its vehicles or products, but only its pay package that would get its CEO paid.

Some of those who saw the ad are questioning the strategy:

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Tesla Robotaxi testing in Arizona is ramping up quickly

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Credit: Tesla

Tesla is validating Robotaxi in a new area, and as the company has continued to gain some additional permissions to begin testing in new states, it seems its Full Self-Driving-based ride-hailing project is moving toward a larger footprint.

Two Robotaxi units with LiDAR validation equipment were spotted in Gilbert, Arizona, recently, showing that Tesla is aiming to launch its ride-hailing service in the state soon:

Another unit was spotted in Tempe, Arizona:

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These types of validation vehicles have been spotted in several areas ahead of their launch as a public ride-hailing service for passengers. Tesla first launched Robotaxi in Austin, Texas, back in late June, and since then, it has expanded to the Bay Area of California.

However, Tesla has continued to attempt to expand Robotaxi to other areas as well, including Nevada and Arizona. It has also been working toward approvals in other states based on job postings, as Tesla is hiring for Autopilot Vehicle Operators in New York and Florida, as well.

The expansion of the Robotaxi ride-hailing service has been an effort that Tesla has been spending a lot of time on over the past few months. CEO Elon Musk said the expansion aims to bring Robotaxi to at least half of the U.S. population by the end of the year, but there is still plenty of work to be done.

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Tesla Robotaxi heads to a new major Texas city for the first time

Tesla did make its Robotaxi app public in recent months, allowing more members of the public to experience the suite for themselves, as long as they could get to Austin or the Bay Area.

In the coming months, it seems more apparent that Tesla will take a broader focus on expanding Robotaxi, especially with the fact that these validation vehicles are being spotted throughout different parts of the United States.

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