Connect with us
Tesla-4680-battery-cells-3 Tesla-4680-battery-cells-3

News

Tesla 4680 cells compared with BYD Blade and CATL Qilin structural batteries

Image used with permission for Teslarati. (Credit: Tom Cross)

Published

on

The battle for the dominance of the electric vehicle sector would likely be determined by the market’s key battery makers. With this in mind, companies such as BYD, CATL, and Tesla — all of whom are exploring the structural battery form factor — have the chance to become the trailblazers of the next generation of electric car batteries. 

During its Battery Day event, Tesla announced its 4680 cells, which are used alongside the company’s structural battery pack. BYD, on the other hand, has also released its Blade batteries, which also adopt a non-modular approach. CATL’s Qilin batteries are in the same segment, with its structural battery design. 

Electric vehicle battery enthusiast Jordan Giesige of YouTube’s The Limiting Factor channel recently conducted a comparison of the advantages and disadvantages of Tesla, BYD, and CATL’s next-generation structural packs. Each battery pack was evaluated according to several factors, such as design, rigidity, packing and energy density, and safety, before being ranked. It should be noted that the figures used in the comparisons are drawn from estimates and materials released by Tesla, BYD, and CATL themselves, not current real-world observations. 

As noted by Giesige, Tesla’s 4680 structural battery packs utilize hundreds of cylindrical cells with a cooling ribbon in between every other row of cells. A lid is then placed on top and polyurethane foam is injected into the pack. This polyurethane hardens, and the combination of the foam and the battery cells forms a rigid, honeycomb-type structure. 

CATL Qilin batteries, which could be fitted with both nickel and iron-based cells, integrate thermal pads, the liquid cooling plate, and the cross bracing to create what could be described as structural cooling. The structural cooling is placed between each row of prismatic battery cells, and the cells themselves are placed into the pack directly without any modules. BYD Blade batteries use iron-based prismatic cells, though these cells are longer and thinner than those used by CATL. The cells are then stretched across the BYD Blade battery pack, allowing the cells themselves to replace conventional steel beams. 

Advertisement
Credit: The Limiting Factor/Twitter

In the rankings of the next-generation batteries, the YouTube host noted that Tesla’s 4680 structural battery pack would likely be the most rigid among its peers. Tesla’s 4680 pack loses out in terms of packing density, however, as BYD and CATL’s use of prismatic cells maximizes volumetric energy density. With this in mind, and considering that CATL’s Qilin batteries can be fitted with high-energy density nickel-based cells, a nickel-based Qilin battery would likely be more energy dense than a nickel-based Tesla 4680 pack or a BYD Blade structural battery, which uses less energy dense iron-based cells.

As for cooling, Giesige noted that the BYD Blade batteries’ plate cooling would likely fall short of the Tesla 4680 pack and CATL Qilin battery’s cooling systems. In its marketing materials, CATL highlighted that cooling the sides of the Qilin battery increases the pack’s cooling area four times. Tesla’s 4680 battery also uses better cooling than BYD’s Blade batteries with its side cooling system, though it would likely not be as good as the cooling of CATL’s Qilin structural packs

While BYD’s Blade batteries lose out in cooling, they are also likely the safest among its peers. This is because the BYD Blade battery uses iron-based cells, which have a higher decomposition and lower heat release temperature than the nickel-based cells used in Tesla’s 4680 cells and CATL’s nickel-based Qilin batteries. An iron-based Qilin battery comes second to the BYD Blade, partly due to its use of shorter and thicker prismatic cells, which may trap more heat. 

A Qilin pack with nickel-based cells was ranked last in terms of safety by the battery enthusiast, as Tesla’s 4680 pack with nickel-based cells features several safety systems, such as an overpressure mechanism on the bottom of the cells themselves. Since 4680 cells are also smaller than the prismatic cells used in the BYD Blade and CATL Qilin, they contain less energy. The 4680 cells themselves are enclosed in a thick shell as well, which are about 2-3 times thicker than a conventional battery. 

Overall, Giesige noted that Tesla’s 4680 cells are likely the best all-rounder compared to its peers in the structural battery segment. The overall scores of the BYD Blade and CATL Qilin batteries bode well for Tesla’s future, however, as the companies could become suppliers of the EV maker in the future. CATL is already supplying Tesla with LFP batteries today, and BYD is heavily rumored to be a Tesla supplier as well. In a way, the analysis of the next-generation structural EV batteries shows that Tesla is not alone in pushing the battery industry forward. 

Watch The Limiting Factor‘s full analysis in the video below. 

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

Advertisement

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.

Advertisement
Comments

Elon Musk

The Boring Company begins hiring for Nashville’s Music City Loop

Tennessee Gov. Bill Lee expressed strong support for the project.

Published

on

Credit: The Boring Company/X

Elon Musk’s The Boring Company has started recruitment efforts for the Music City Loop, an underground tunnel system designed to link downtown Nashville with Nashville International Airport. 

Tennessee Gov. Bill Lee expressed strong support for the project, describing it as a cost-free alternative to traditional mass transit systems that could ease traffic congestion in the city. Initial digging began in mid-August, with visible progress reported by September 1, as noted in a WKRN report.

Job creation and project scope

The Boring Company is currently seeking engineers, electricians, mechanics, and operations coordinators as part of its hiring drive for the Music City Loop in Nashville. Gov. Lee emphasized that unlike large-scale transit projects that typically cost billions, the tunnel system will not burden taxpayers.

“We’ve been trying to find ways, Metro Nashville has in particular, to develop transit in the city for a long time. It costs billions and billions of dollars to build out transit systems. We now have an opportunity to have a transit system that costs the taxpayers nothing,” Lee said, calling the effort the fast lane to the city’s future.

The Music City Loop aims to provide a quick and efficient link between the city center and the airport, similar to The Boring Company’s other tunnel projects like the Las Vegas Convention Center Loop. Officials have praised the company for cooperating with state permitting and regulatory requirements, suggesting that the Nashville Loop project is advancing in line with established processes.

Advertisement

Community reactions and concerns

While officials are optimistic, community response has been mixed. Some residents have raised concerns about the speed of approval and a lack of public discussion before construction began.

Nashville resident Taylor John cited environmental impacts and worries that the tunnel could primarily serve tourists rather than local commuters. “I have a lot of concerns, first of all, by how fast this decision was made, I don’t think there was a lot of discussion from the members of the community before this decision was made. It’s going to impact us,” the resident stated.

Others, however, see the project as an innovative leap forward. “There’s a whole untapped potential underneath our feet,” resident Nathaniel Lehrer stated. “Anything that can save time when picking up family or friends or you need to catch a flight, it’d be an awesome option to have.”

Continue Reading

News

Miami Beach Mayor considering Elon Musk’s Boring Company tunnels

Miami Beach faces unique constraints, including chronic flooding, porous limestone foundations, and its low elevation near sea level.

Published

on

the-boring-company-tesla-robotaxi
(Credit: The Boring Company

Miami Beach Mayor Steven Meiner has asked city commissioners to consider whether underground transit tunnels could be a feasible solution to the city’s worsening traffic. 

The proposal reflects growing interest in exploring unconventional transit options, especially after city leaders rejected plans to extend the downtown Miami Metromover to South Beach.

New transit alternatives

In a memo, Meiner noted that his request is not tied to a single project but is intended to open a broader discussion on engineering challenges, environmental impacts, potential funding, and integration with existing transit systems. Miami Beach faces unique constraints, including chronic flooding, porous limestone foundations, and its low elevation near sea level, according to Axios.

The tunnel idea is not entirely new. In 2022, Meiner suggested reaching out to Elon Musk’s The Boring Company to discuss potential projects, citing the firm’s work on the Vegas Loop in Las Vegas. At the time, the city passed a resolution to study tunnels further, though it remains unclear whether any formal discussions with the tunneling startup actually took place.

Previous proposals

The Boring Company has shown interest in South Florida before. In 2021 and 2022, it submitted plans for Tesla-powered tunnel systems in Fort Lauderdale and North Miami Beach. While the Fort Lauderdale project was later suspended, reports suggest the North Miami Beach proposal remained active into 2023. Musk also met with Miami Mayor Francis Suarez in 2021 to discuss tunnel systems, though no progress has been reported since.

Advertisement

The Boring Company has garnered some experience with consumer tunnels over the years, thanks in no small part to the Las Vegas Convention Center and Vegas Loops, which use Tesla vehicles. The greater Vegas Loop is still being expanded today, and efforts are underway to transition the Teslas being used in the tunnels to use Unsupervised FSD.

Continue Reading

News

Tesla owners are celebrating Model Y L first deliveries

The timing of the Model Y L’s release aligns with growing demand for Tesla vehicles in China.

Published

on

Credit: @LuisZhu/X

Tesla customers in China seem to be loving the Model Y L. This was hinted at in posts from the electric vehicle maker on Chinese social media platform Weibo.

The Model Y L is Tesla’s entry into China’s competitive six-seat crossover SUV segment, which has previously been out of reach for the standard Model Y.

Model Y L delivery celebrations

Tesla Model Y L owners in China have been sharing enthusiastic reviews following the delivery of their vehicles. Many cited the SUV’s safety, practicality, and family-friendly design as key reasons for choosing the vehicle. Several noted that they placed orders for the vehicle without seeing the Model Y L in person, while others highlighted that they “only trust Tesla for its safety and technology.”

“For our two kids and two grandparents, the six-seater Model Y L is perfect for our family of six. Because we trust Tesla’s safety and intelligent features, we placed a blind order to be among the first owners to take delivery!” one Model Y L owner stated, as translated by Tesla watcher @tslaming.

Owners praised the six-seater’s handling, spaciousness, and advanced features, with one calling it “perfect” compared to competitors. Families highlighted the Model Y L’s suitability for accommodating children and grandparents, while others described upgrading from previous Teslas as a natural choice. Some even made long trips to pick up their vehicles, eager to take road trips across China in the new model.

Advertisement

“This is my second Tesla, and I specially took the high-speed train to pick it up! The first thing I’ll do with my new car is take my family and dog on a road trip to Xinjiang, and travel all over China with the Model Y L,” another Model Y L customer wrote. 

Tesla Model Y specs

Unveiled on August 19, the Model Y L joins Tesla’s existing five-seat variants in China, offering a larger footprint and additional seating. Priced from RMB 339,000 ($47,460), the vehicle is positioned above the RWD and long-range AWD five-seat versions. The Model Y L is longer than the standard Model Y, with a wheelbase extended to 3,040 mm.

The timing of the Model Y L’s release aligns with growing demand for Tesla vehicles in China. Recent insurance registration data showed 12,500 Tesla units recorded last week, a 21% increase from the previous week’s 10,300 units. Analysts expect the addition of the six-seat SUV to broaden Tesla’s appeal to families seeking larger electric options, further boosting sales momentum this third quarter.

Continue Reading

Trending