Cont: Electric Vehicles II

[Dabop]

If we add 300kWh going from 10%-70% that battery is a 500kWh pack, and would probably have a mass over 2500kg. That is what needs to absorb the 10MJ. So it has somewhere to go.

Your weights are a bit high lol as are your battery capacities...

The Gen 3 Atto 3 here in Australia doesn't weigh that much for the entire car- and the Premium version released here back in early 2026 already has the 800v battery pack voltage needed for 'full bore' megacharging...
(the 400v battery versions can 'use' a mega charger, but their charging speed is reduced to compensate- it will take a bit longer to charge the same amount of kWh- the 800v battery pack is essential to these charging speeds)

2026 BYD Atto 3 Debuts - 4.7m Length, 68.54 kWh, 630 Kms Range

The new-gen Atto 3 is offered with two battery options – 57.54 kWh and 68.54 kWh, both based on BYD’s updated Blade Battery technology

www.rushlane.com

https://www.vehiclesizes.com/cars/byd/atto-3/atto-3-evo-suv-2026

Hell the whole car doesnt weigh that much (1990kg/1.99 tonnes/4387 lbs)...
630km/391 miles range, under 9 min on a Flash charger to full, 6 mins to 80% from 10% with its 68.5kWh battery pack in the Premium version....

 

[Dabop]

There's a lot of 'guessing' going on in this thread- BYD don't screw around (they have been building BEVs since 2009, and BYD trucks and buses started being sold in 2012- they build their own batteries themselves (in fact the non US made Teslas use their Blade 1 battery packs in their cars lol)

The new Blade 2 LFP is chemically doped, and can handle up to a 10C rating....
(and BYD is sold in most of the world save for 'one country' lol- if they were ◊◊◊◊◊◊◊◊◊◊◊◊ their figures, it would soon become apparent as they sell far more EVs than Tesla do worldwide...)

BYD Blade Battery 2.0: 10C Charging & 1000km Range

Deep dive into BYD Blade Battery 2.0 with LMFP chemistry, 10C fast charging, 1000km range, safety tests, and real-world performance.

bydcarchina.com

 

[SpuriusMaximus]

If we add 300kWh going from 10%-70% that battery is a 500kWh pack, and would probably have a mass over 2500kg. That is what needs to absorb the 10MJ. So it has somewhere to go.

Well, I'm just shooting from the hip based on the numbers in the press releases. They did mention reducing range anxiety, so I have no idea what the capacity and weight are. Maybe they did make a bigger battery for range. I don't know.

Still, if just the battery is two and a half tons? By Lucifer Morningstar. That car could plough straight through a schoolbus. Forget worrying about SUVs, that thing is gonna hit you like a tram.

 

[Here_to_learn]

Your weights are a bit high lol as are your battery capacities...

Absolutely - I'm just continuing the calculation from the post I quoted.

A 500kWh battery would go in a truck or bus.

But for a smaller battery, like that BYD you still would not have a problem with the temperature rise, since you would add propotionally less heat to it.

 

[Dabop]

BYD also make Denza EVs (its the 'luxury' brandname for the BYD) and they DO have a 1000km range (well thats using the 'optimistic' CLCT range- in real world driving its closer to 800km from a 122kWh battery pack, but still with sub 9 minute charging...

https://www.whichcar.com.au/news/denza-z9-gt-claims-astounding-1000km-plus-ev-range

Another thing to note- the Flash charging is capped by the battery capacity- so the smaller Atto 3 battery will not use the 'full' speed of the Flash chargers- its important to note that the 1.2/1.5/2/2.5MW is the MAXIMUM at which it can charge, not what it always WILL charge at- that maximum rate is set by the car itself (and its battery capacity)- nothing to do with the chargers maximum rate...

 

[Dabop]

AFAIK, the BYD trucks still use the 400v/Blade 1 battery packs- this one for example is a 'short range' local city delivery 2x4 version, and its still only half your battery capacity lol

They have been on the market since 2023- that's a 2024 model...
(BYD do make larger 'semi' prime movers as well, sold tens of thousands around the world- they sold their 100th one just in the US alone in 2020... by that stage they had sold over 12000 worldwide (and the Tesla semi wasn't even off the design papers by that stage lol)

Be interesting to see what the Flash chargers could do on a BYD truck with Blade 2 battery packs...

 

[acbytesla]

Fastest charging EV by C rate

The fastest mass-produced electric vehicles by C-rate (the rate at which a battery can charge relative to its total capacity) reach up to 5.5C.

Top C-Rate EV Leaders

• Zeekr 007 and Zeekr 7X: These models (equipped with Zeekr’s second-generation Golden Battery LFP chemistry and 800V/900V architecture) support a 5.5C maximum charging rate. When plugged into a high-output ultra-fast charger (such as Zeekr's V3 piles), they can charge from 10% to 80% in about 9.5 to 10.5 minutes.
• CATL Shenxing-powered EVs (e.g., Zeekr 001 and select partners): Support 5.5C or 5C peak charging rates, delivering around 310 miles of range in roughly 12 minutes under ideal conditions.
• BYD New Platforms (Han L / Tang L): Utilizing upgraded blade batteries and high-voltage platforms, BYD models push high-rate flash charging up to 10C manufacturer-claimed peak tiers for brief windows, though typical production operating rates cluster around 5C+ speeds.

Western Market Comparison

For context, mainstream Western and North American EVs generally charge at lower C-rates:
• **Hyundai Ioniq 6 / Hyundai Ioniq 5: Peaks around 3.3C (~260–350 kW architecture), doing 10–80% in roughly 18–20 minutes.
• Porsche Taycan: Peaks around 2.7C (~270–320 kW), doing 10–80% in under 20 minutes.
• Tesla Model 3 / Model Y: Generally peak around 2.4C to 2.5C.

A 5.5C rate is impressive. But that is a very long ways away from 22 C.

 

[Dabop]

Fastest charging EV by C rate

The fastest mass-produced electric vehicles by C-rate (the rate at which a battery can charge relative to its total capacity) reach up to 5.5C.

Top C-Rate EV Leaders

• Zeekr 007 and Zeekr 7X: These models (equipped with Zeekr’s second-generation Golden Battery LFP chemistry and 800V/900V architecture) support a 5.5C maximum charging rate. When plugged into a high-output ultra-fast charger (such as Zeekr's V3 piles), they can charge from 10% to 80% in about 9.5 to 10.5 minutes.
• CATL Shenxing-powered EVs (e.g., Zeekr 001 and select partners): Support 5.5C or 5C peak charging rates, delivering around 310 miles of range in roughly 12 minutes under ideal conditions.
• BYD New Platforms (Han L / Tang L): Utilizing upgraded blade batteries and high-voltage platforms, BYD models push high-rate flash charging up to 10C manufacturer-claimed peak tiers for brief windows, though typical production operating rates cluster around 5C+ speeds.

Western Market Comparison

For context, mainstream Western and North American EVs generally charge at lower C-rates:
• **Hyundai Ioniq 6 / Hyundai Ioniq 5: Peaks around 3.3C (~260–350 kW architecture), doing 10–80% in roughly 18–20 minutes.
• Porsche Taycan: Peaks around 2.7C (~270–320 kW), doing 10–80% in under 20 minutes.
• Tesla Model 3 / Model Y: Generally peak around 2.4C to 2.5C.

A 5.5C rate is impressive. But that is a very long ways away from 22 C.

BYD Blade 2 is up to 10C for extended time (nothing 'claimed' about it- theres literally tens of thousands of these chargers already in use in China, and Australia's are just about to start operating too lol)
No-one claiming 22C on charging...

Like ALL chargers- the actual charge rate will depend on battery state of charge (the higher the battery is in charge, the slower the charge rate becomes)- which is why seasoned EV owners don't charge to 100% on fast chargers on long trips- that last 20% takes as long as the previous 60% does!!!! on long trips, do the 20% to 80% and then start driving again...

The charger also monitors the battery pack temperature- if it starts to rise above its programmed limits, it will 'throttle' the packs charge rate down to keep the battery from overheating....
(The Atto 3 EVO (Gen 3) does 20-80% in 6 minutes, and to 100% in 9 minutes)- the older (2022-2026 in Australia) Gen 2 models with their 400v architecture do 20%-80% in 20 mins, to 100% in 40 minutes...)


from https://bydcarchina.com/byd-blade-b...y-behind-1000-km-range-and-9-minute-charging/

 

[acbytesla]

2. 2 megawatt charging for a 100KWh battery pack is 22C. Charging 50KWh of a 100KWh pack would be 11C.