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Rivian patent application hints at 900V fast charging capabilities
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.“
- Figure from Rivian’s battery connection switching patent application. | Image: Rivian/USPTO
- Figure from Rivian’s battery connection switching patent application. | Image: Rivian/USPTO
- Figure from Rivian’s battery connection switching patent application. | Image: Rivian/USPTO
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 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.
Elon Musk
Elon Musk’s Starbase, TX included in $84.6 million coastal funding round
The funds mark another step in the state’s ongoing beach restoration and resilience efforts along the Gulf Coast.
Elon Musk’s Starbase, Texas has been included in an $84.6 million coastal funding round announced by the Texas General Land Office (GLO). The funds mark another step in the state’s ongoing beach restoration and resilience efforts along the Gulf Coast.
Texas Land Commissioner Dawn Buckingham confirmed that 14 coastal counties will receive funding through the Coastal Management Program (CMP) Grant Cycle 31 and Coastal Erosion Planning and Response Act (CEPRA) program Cycle 14. Among the Brownsville-area recipients listed was the City of Starbase, which is home to SpaceX’s Starship factory.
“As someone who spent more than a decade living on the Texas coast, ensuring our communities, wildlife, and their habitats are safe and thriving is of utmost importance. I am honored to bring this much-needed funding to our coastal communities for these beneficial projects,” Commissioner Buckingham said in a press release.
“By dedicating this crucial assistance to these impactful projects, the GLO is ensuring our Texas coast will continue to thrive and remain resilient for generations to come.”
The official Starbase account acknowledged the support in a post on X, writing: “Coastal resilience takes teamwork. We appreciate @TXGLO and Commissioner Dawn Buckingham for their continued support of beach restoration projects in Starbase.”
The funding will support a range of coastal initiatives, including beach nourishment, dune restoration, shoreline stabilization, habitat restoration, and water quality improvements.
CMP projects are backed by funding from the National Oceanic and Atmospheric Administration and the Gulf of Mexico Energy Security Act, alongside local partner matches. CEPRA projects focus specifically on reducing coastal erosion and are funded through allocations from the Texas Legislature, the Texas Hotel Occupancy Tax, and GOMESA.
Checks were presented in Corpus Christi and Brownsville to counties, municipalities, universities, and conservation groups. In addition to Starbase, Brownsville-area recipients included Cameron County, the City of South Padre Island, Willacy County, and the Willacy County Navigation District.
Elon Musk
The Boring Company wins key approval for Nashville Music City Loop
The approval allows The Boring Company to use state-owned right-of-way along Tennessee’s highway system.
Tennessee Gov. Bill Lee announced that the Tennessee Department of Transportation (TDOT) and the Federal Highway Administration (FHWA) have jointly approved The Boring Company’s lease application and enhanced grading permit for the Music City Loop.
The approval allows The Boring Company to use state-owned right-of-way along Tennessee’s highway system, clearing a key hurdle for the privately funded tunnel project that aims to connect downtown Nashville to Nashville International Airport in approximately eight minutes, the Office of the TN Governor wrote in a press release.
“Tennessee continues to lead the nation in finding innovative solutions to accommodate growth, and in partnership with The Boring Company, we are exploring possibilities we couldn’t achieve on our own,” Gov. Lee said in a statement.
“The Boring Company is grateful for the leadership and hard work of federal, state, and local agencies in bringing this project to a shovel-ready point,” The Boring Company President Steve Davis said. “Music City Loop will be a safe, fast, and fun public transportation system, and we are excited to build it in Nashville.”
With lease and permitting approvals secured, The Boring Company will move forward with the Loop system’s construction immediately. The first segment of the Loop system is expected to be operational by the end of the year.
The Music City Loop will run beneath state-owned roadways and is designed to connect downtown Nashville to the airport, as well as lower Broadway to West End. The project will be 100% privately funded.
“The Music City Loop shows what’s possible when we leverage private-sector innovation and American ingenuity to solve transportation challenges,” said U.S. Transportation Secretary Sean Duffy. “TDOT’s lease approval will help advance this ambitious project as we work to reduce congestion and make travel more seamless for the American people.”
The Boring Company described the Loop as an all-electric, zero-emissions, high-speed underground transportation system that will meet or exceed safety standards. The Vegas Loop, for one, earned a 99.57% safety and security rating from the DHS and the TSA, the highest score ever awarded to any transportation system.
News
Tesla China extends its 7-year financing promotion once more
The move marks Tesla’s second extension of the program this year.
Tesla has extended its seven-year ultra-low-interest and five-year interest-free financing programs in China once more, pushing the offers through March 31, the end of the first quarter.
The move marks Tesla’s second extension of the program this year. The financing plan was first introduced on January 6 as a strategy aimed at offsetting higher ownership costs ahead of China’s planned 5% NEV purchase tax in 2026.
The original promotion was set to expire at the end of January but was extended to the end of February. This has now been extended again through March.
The repeated extensions reflect growing competitive pressure. Tesla’s 2025 retail sales in China totaled 625,698 units, representing a 4.78% year-on-year decline, as per data compiled by CNEV Post. That being said, this decline is partly caused by the Model Y’s changeover to its new variant in Q1 2025, which resulted in lower sales during the quarter.
In early 2026, the Model Y also lost its position as China’s top-selling EV in January to Xiaomi’s YU7, though this was also a month when Tesla primarily exported vehicles to foreign territories, which pushed local delivery numbers lower.
During January 2026, Tesla China exported 50,644 vehicles, roughly 1.7 times higher than the same month a year ago and more than 15 times higher than December’s level.
Tesla’s financing push has not gone unanswered. BYD this week introduced its own seven-year low-interest plan across its Ocean lineup and Fang Cheng Bao sub-brand, also valid through March 31. Other competitors including NIO, XPeng, Li Auto, and Geely Auto have already rolled out extended-term loan programs as well.


