Key Takeaway: BYD''s Blade Battery outlasts Tesla''s 4680 Battery in terms of longevity. Part 4. Space utilization. BYD Blade Battery: BYD''s cell-to-pack (CTP) design eliminates traditional modules, arranging cells as flat, blade-like structures. This innovation minimizes unused space within the battery pack. Tesla 4680 Battery:
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,...
Tesla 4680 and BYD Blade battery are competing to outperform each other with distinctive features. The electric car scenario is playing out quite aggressively across the globe. Tesla is the biggest auto giant in the space, while the BYD is an upcoming worthy Chinese competitor.
As discovered on a German TFF forum, and previously reported by German publication Teslamag , the new BYD battery cells seem to stay at their peak charging rate for much longer than CATL''s LFP...
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 ’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.
In the rankings of the next-generation batteries, the 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.
WatchThe Limiting Factor‘s full analysis in the video below.
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There''s now a Tesla Model Y being produced at Gigafactory Berlin that''s fitted with battery cells from BYD. This likely won''t matter to the masses, but it''s well worth looking into.
Tesla and BYD are seen as rivals, though CEO Elon Musk has made it clear that the two competing companies are on positive terms. In fact, Musk has lots of respect for some of Tesla''s China-based rivals, much like he has respect for Ford in the US, though he only sees China''s brands as true competitors.
We reported some time ago that there might be Tesla Model Y crossovers produced in Berlin with BYD battery cells. While this may have come as a surprise to some folks, it makes enough sense. Tesla gets battery cells from multiple sources, and it has recently started using different battery chemistries in different versions of its various models.
Last year, it became known, or at least assumed, that Tesla was purchasing battery cells from BYD. Details were slim, but Electrek reported that Tesla may be using the BYD "Blade battery." It''s an LFP cell that''s in a longer format, much like a blade. Once it was established that Tesla was actually producing cars with some form of BYD battery cells, it piqued the interest of fans and experts.
As discovered on a German TFF forum, and previously reported by German publication Teslamag , the new BYD battery cells seem to stay at their peak charging rate for much longer than CATL''s LFP battery cells. The two different cell brands and formats appear to have a comparable upper charging rate, however:
Nonetheless, the early assessments show that the BYD cells have a slightly higher upper charge rate, and can maintain it for a longer period of time over the higher state. In the end, this would suggest that the BYD battery cells will charge more quickly than the CATL cells.
If you''ve checked out any of our very long and detailed EV charging curvevideos/articles, you likely know that this is a complex subject. There are many variables involved, and to get a real grasp on how the Model Y charges with the two different cells would require an entire charging curve analysis of each example in the same conditions.
Regardless, it''s interesting to learn not only that Tesla is using the BYD cells, but also that they may have advantages that will appeal to owners. Let us know your thoughts in the comment section below. In the future, do you think car buyers will go so far as to choose an EV based on its battery cells?
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On March 29, 2020, BYD unveiled its groundbreaking Blade Battery at a Shenzhen TV event, bringing lithium batteries into the spotlight. Produced at the Chongqing facility, this battery uses lithium iron phosphate (LiFePO4) and made its debut in the BYD Han electric vehicle.
The Blade Battery is aptly named for its slender, blade-like shape (typically 13.5mm*90mm*960mm). It employs a unique stacking technique, with electrode sheets stretching beyond 900mm in length. These Blade Batteries are integrated into the base of the battery pack, eliminating traditional modules and improving space utilization by approximately 50%.
Key Advantages of the Blade #Battery:
1. Outstanding Space Utilization:
Unlike traditional battery packs that have a cell-module-pack assembly structure with around 40% space utilization, the Blade Battery uses a cell-pack assembly, achieving approximately 60% space utilization. It serves both as an energy provider and structural support.
2. Impressive Strength:
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