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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.

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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.

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.

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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.

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 Sweden strikers see tax issues over IF Metall union error

To address the issue, IF Metall is encouraging Tesla strikers to return the refunded tax amounts to the union.

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Credit: Tesla Europe

A tax correction is set to return two years of income tax payments to Tesla strikers in Sweden, after authorities determined that conflict compensation during a labor dispute should not have been taxed.

The issue is caused by a decision by IF Metall to treat strike compensation for Tesla workers as taxable income during the ongoing labor dispute with Tesla Sweden. That approach has now been reversed following guidance from the Swedish Tax Agency.

Strike compensation is typically tax-free under Sweden’s Income Tax Act, as noted in a report from Dagens Arbete (DA). However, two years ago, IF Metall’s board decided to classify payments to Tesla strikers as taxable.

“We did it to secure SGI, unemployment insurance and public pension. Those were the risks we saw when the strike had already dragged on,” Kent Bursjöö, financial manager at IF Metall, stated.

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According to Bursjöö, the union wanted to ensure that members continued to register earned income with the tax agency, protecting benefits tied to income history. At the end of January, however, the Swedish Tax Agency informed the union that compensation during a labor dispute must be tax-free.

“Of course, we knew that it could be tax-free. But we clearly didn’t know that it couldn’t be taxable,” Bursjöö said.

Following discussions with auditors and tax authorities, IF Metall began correcting the payments. As a result, two years of paid income tax will now be credited back to the affected strikers’ tax accounts. The union will also recover previously paid employer contributions.

However, the correction creates secondary effects. Since the payments will now be treated as tax-free, pension contributions tied to those earnings will be withdrawn, potentially affecting state pension accrual and income-based benefits such as parental or sickness benefits.

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To address this, IF Metall is encouraging members to return the refunded tax amounts to the union. In exchange, the union plans to pay 18.5% into occupational pensions on their behalf. “Otherwise, it will be a form of overcompensation when they get the tax paid back,” Bursjöö said.

That being said, the IF Metall officer acknowledged that the union’s legal ability to reclaim the funds from its improperly paid Tesla Sweden strikers is limited. “The legal possibilities are probably limited, from what we can see. But we assume that most people see the value of securing their pension,” Bursjöö said.

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Tesla sues California DMV over Autopilot and FSD advertising ruling

The complaint seeks to remove the agency’s conclusion that Tesla falsely promoted the capabilities of Autopilot and Full Self-Driving.

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Credit: Tesla

Tesla has filed a lawsuit against the California Department of Motor Vehicles (DMV) in an effort to overturn a prior ruling that found the automaker engaged in false advertising related to its driver-assistance systems. 

The complaint seeks to remove the agency’s conclusion that Tesla misled customers about the capabilities of Autopilot and Full Self-Driving.

Tesla’s legal action follows a decision by California’s Office of Administrative Hearings (OAH), which concluded that Tesla’s earlier marketing of “Autopilot” and “Full Self-Driving” violated state law, as noted in a CNBC report. 

While the DMV opted not to suspend Tesla’s license after determining the company had updated its marketing language for its advanced driver-assistance systems, Tesla is asking the court to go further and reverse the agency’s conclusion.

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In its Feb. 13 complaint, Tesla’s attorneys argued that the DMV “wrongfully and baselessly” labeled the company a “false advertiser” for its Autopilot and FSD systems. The filing argued that regulators failed to demonstrate that consumers were actually misled about the capabilities of Tesla’s systems.

According to Tesla’s complaint, the DMV “never proved consumers in the state had been confused about whether its cars were safe to drive without a human at the wheel.”

Tesla’s legal team further stated: “It was impossible to buy a Tesla equipped with either Autopilot or Full Self-Driving Capability, or to use any of their associated features, without seeing clear and repeated statements that they do not make the vehicle autonomous.”

Tesla now promotes its driver-assistance system as “Full Self-Driving (Supervised),” a name that overemphasizes the need for active driver attention.

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Tesla’s autonomous driving program is a pivotal part of the company’s future, with CEO Elon Musk stating that self-driving technology will truly be the solution that will push Tesla into its full potential. The company is currently operating a Robotaxi pilot in Austin and the Bay Area, and the company recently announced that it has produced the first Cybercab from Giga Texas’ production line. 

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Tesla is making two big upgrades to the Model 3, coding shows

According to coding found in the European and Chinese configurators, Tesla is planning to make two big upgrades: Black Headliner offerings and a new 16-inch QHD display, similar to that on the Model Y Performance.

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Credit: Tesla

Tesla is making two big upgrades to the Model 3, one of which is widely requested by owners and fans, and another that it has already started to make on some trim levels of other models within the lineup.

The changes appear to be taking effect in the European and Chinese markets, but these are expected to come to the United States based on what Tesla has done with the Model Y.

According to coding found in the European and Chinese configurators, Tesla is planning to make two big upgrades: Black Headliner offerings and a new 16-inch QHD display, similar to that on the Model Y Performance.

These changes in the coding were spotted by X user BERKANT, who shared the findings on the social media platform this morning:

It appears these new upgrades will roll out with the Model 3 Performance and Tesla’s Premium trim levels of the all-electric sedan.

The changes are welcome. Tesla fans have been requesting that its Model 3 and Model Y offerings receive a black headliner, as even with the black interior options, the headliner is grey.

Tesla recently upgraded Model Y vehicles to this black headliner option, even in the United States, so it seems as if the Model 3 will get the same treatment as it appears to be getting in the Eastern hemisphere.

Tesla Model 3 wins Edmunds’ Best EV of 2026 award

Tesla has been basically accentuating the Model 3 and Model Y with small upgrades that owners have been wanting, and it has been a focal point of the company’s future plans as it phases out other vehicles like the Model S and Model X.

Additionally, Tesla offered an excellent 0.99% APR last week on the Model 3, hoping to push more units out the door to support a strong Q1 delivery figure at the beginning of April.

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