BYD Atto 3 60 kWh battery overheating test

[@ricosun]

These are good feedback to BYD. Make everycar better, so everyone can have an enjoyable drive.

[@Morvis70]

Bjorn is a priceless source of information for automakers

[@p82maarj]

Hope that BYD will take your optimizations and update the firmware because it will probably be the best selled car from BYD. Also I hope they let you the updated fw car to pass the 1000km test again Thanks for your hard work for helping EV world 👏🏼

[@MrVeeBlog]

Maybe BYD should have you on retainer if not to do live testing but to train their testers on how to test and what to look for. They seem to be locked into some methodology that blinds them to how to engineer for the real world. Thanks for this one Bjorn. All the best.

[@youxkio]

Hello Bjørn. I mentioned Thailand as an example because I also live in the tropics of Taiwan. I see this BYD Atto has a quirky heat pump. It cools the battery as it cools the cabin. It probably should be updated over the air to start cooling the battery at 35 degrees during charging. Yeah.... I just checked you have the same opinion. I am writing as I watch your video. Bjørn, I would suggest you make another 1000km next year with this BYD. By that time it may have some over-the-air upgrades.

[@B.O.Z.5]

15:51 I would not repeat the 1k challenge. It took you a lot of time to identify the problem (thanks for this great work and all the effort). And I don't think anyone would do that unless there is as much expertise as you have. And after all, the 1k challenge should be a realistic representation of the car's specs and performance. And these problems are unfortunately the daily business when driving an Atto 3.

[@yhfsywfit]

Bjorn this is another level of EV car review. It seems like you care more about the truth than the BYD engineers.

[@LightningSe7en]

They gotta say stuff to sell

[@nadnerb2k]

Thanks Bjorn! Love my Atto. Yes, it has its flaws, but knowing about them helps. This series has been really informative.

[@flatslide3250]

That's really useful information, thank you Bjorn. Our open road limit is 100km/h and fines start at 5km/h over that. On highway journeys I've not encountered battery overheating/throttling but our fastest chargers are 75kW, with the majority being 50kW. I did experience the disconnection issue with two BP chargers in a row in Christchurch - at different locations. Both being failed handshakes.

[@LuciaGomez-yb3om]

Björn the EV NINJA!

[@GerthebearBrady.]

This shows why Tesla's octovalve makes it much more efficient. It gives vehicles with a single heat pump the ability to heat the cabin and cool the battery (and vice Versa ) at the same time without having to sacrifice one or the other. As most vehicles do not have a comparable system to the octavalve, the results that you see in the test make sense?

[@locksmack]

Excellent video Bjorn. Apparently a software update is coming within a month to address the fogging issues. We can hope!

[@GabrieleBonetti]

The suggestion for BYD in the end is ABC - Always Be Cooling

[@shanestanley3369]

The v1.6 OTA update in Australia has been withdrawn because it moved the fogging issue from one condition to another. But the release said: • Improved ventilation function after Air Compressor shut off to prevent fogging after shut-off in cooler temperatures. • Optimization of DC charging power, extend high-power charging duration. • Improved DC charging gun locking communication. So it would be interesting to know what version is running in Norway. Do you have the option of "Dynamic" range estimation?

[@MrDeferens]

No he didn't have dynamic on the test. Sounds like they are on 1.5.

[@hartoz]

@@MrDeferens i think your correct.

[@Babychickhands]

Had the same fogging issues when we did a trip 2 days after updating to 1.6, I thought he had 1.6, if not then fogging while driving was always there even with 1.5, no longer have fogging issues with 1.6 after parking, dc charging was improved specifically from 95-100%.

[@MancMoto]

Thanks for doing this testing, let’s hope the next update can fix things 👍

[@mishka5152]

Thank you Bjørn! I have the same problem with my Han here in Oslo. This explains why it's charging better in 30 degrees in Germany in the summer than in the winter when I,m using heater instead of cooling in cabin. Eureka! It's because it does not cool the battery good enough in th winter. My Han is stopping charging every time I,m charging after 300 km. on German autobahns. If the battery is cooled down before charging it does not happened.

[@message2prateek]

Thanks for your work, hope BYD fixes these issues. Can't believe that they have not sorted out the firmware yet when the car has been out for a while.

[@BigEightiesNewWave]

I see my future here in USA will be eating meals inside car at Circle-K, while car charges. I am planning for my future lifestyle.

[@alexanderroch1030]

Really cool investigation.

[@hartoz]

Those LED lamps are literally blocking half the airflow to the radiators. If you open the hood and look down, you will see an air duct that runs from where those lamps have been put. That's a really bad decision by the owner to put them there. By restricting the airflow to the cooling system your invalidating all your tests.

[@jovceata]

100% correct

[@bjornnyland]

What if I test another Atto 3 and find out that it still overheats?

[@hartoz]

@@bjornnyland then you have a valid test. Would you test an ice car with a sock in the intake? Take any EV and block off part of the air intake and its not going do as well.

[@etsiej]

​@bjornnyland for some reason, I don't think its going to make much of a difference. I get this effect on my atto3 on a 75kwh tritium charger (when it works). It's nice to see some data that backs this up. There is definitely some firmware work to do for BYD. Hopefully your videos on this issue get some attention over in China.

[@shanestanley3369]

@@bjornnyland It would still be likely to overheat, but it would take longer to happen, and may even recover a bit quicker. Ventilation is so important when charging, and they're blocking an awful lot. It still needs fixing, but I suspect those lights have skewed your times a bit.

[@keithwilson1554]

A/C needs to be on Recycle and slightly cooler temperature but run with the upper and lower outlets/fans working. No Defroster on the Windscreen. Thats more for icy weather.

[@peteglass3496]

I had one of those short test drives at Fully Charged Live and found the Atto3 a pretty dull experience, not really enough time though to get a proper feel of the car and check out the tech. Mind you not many are as wild a drive as my normal i3! 😁

[@SripalTAD]

Asia ( india , china, thailand etc) are very particular about fast charging cost and saving energy so may they dont want to run cooling most of the time And most chargers are only 50kw so doesn't matter

[@chengcao418]

Well engineered car should know how much power is coming in

[@SustainableGal]

BYD need to wake up and fix these really silly mistakes, I dont understand how automakers can still be messing up software in 2023, Its getting rediculous, wont be long before Elon starts selling Tesla OS licenses lol

[@FutureSystem738]

Sooo glad my budget was such that I was able to chose a Tesla, no issues like this at all.

[@knightjocke]

I don't think you should need to do all the workarounds as an owner of the car. And that's why I don't think you should rerun the 1000km

[@gzcwnk]

For the fogging there is a OTA update to fix this I believe.

[@s.kxx1956]

Im wondering if the fogging is the result of some poor heat scavenging or something venting heat from the outside in

[@MichaelEricMenk]

It's because the heat pump is being used in heating mode. When it is damp and chilly outside, you want to use a heat pump to cool down the air, and then heat it again. This dries the air, so it does not condense on cold surfaces. I have the AC on all year round except in summer. This is so the air dries the interior. My AC compressor automatically turns off at 3°C, so no worries about water freezing on the evaporator.

[@ianemery2925]

A constantly fogging windscreen is often a clogged pollen filter, or the filter itself may be wet due to a clogged drain gully. Thank you for the honest review - so many people bow to the keyboard warriors the CCP deploy when someone says anything negative about their products. The battery over-heating issues sounds like a few corners have been cut where normal reviewers, and many customers, wouldnt see them. As for the rest, Chinese software always seems buggy - speaking as someone with a lot of exposure to products made originally for the Chinese market - including living there for a while.

[@elmohead]

BYD is not the CCP. They're one of the few Chinese companies that are mostly privately owned.

[@ianemery2925]

@@sammaimas155 , errr, not a Tesla fanboi, I think they are overpriced penis extensions. I drive a KIA Soul EV.

[@ianemery2925]

@@elmohead EVERYTHING that can reflect badly on China is of interest to the CCP; and despite being a "Private" company, they will have a CCP oversight presence on the company board; after all, the CCP has thrown billions of Dollars at them and other tech companies in the recent past. BYD Blade batteries have been spontaneously exploding for months - how much coverage have you seen outside of the last few weeks ??

[@bydman5320]

@@ianemery2925😂😂😂

[@ianemery2925]

@@bydman5320 Yeah...... You would think I would have learnt my lesson after the first time I forgot to close the roof. On that occasion, I opened the door in the morning to find an owl had shat all over the passenger seat.

[@Lewis_Standing]

It's basically missing an octovalve, where it could pull heat out of the battery and put it in the cabin, or out of the motor and into the battery etc. That and a decent software for running it appropriately. But in your charging test you did show that despite this, it charged better than the Mégane up to high SOC despite that having higher headline rate of charge.

[@shanestanley3369]

@Lewis_Standing It does have hardware that does much, if not most, of what the octovalve does. That's what that block of valves and the heat-exchanger under them do. The software is the issue here.

[@slipperygrenade3802]

Which app does he use to display this info?

[@golfzaaaa]

what was the app you are using?

[@kelvinpalattao4644]

what happens when you turn both defogger and ac at the same time?

[@slipperyslope3912]

This is a bizarre cooling loop design. In an ICE, the cooling system dumps engine heat into the cab, then the radiator if excess. An EV should do the same for excess motor/battery heat. IE. Heating the cab should USE battery/motor heat, effectively cooling the battery/motors. Not heat the battery too. It's a more complicated cooling/HVAC loop with the bi-directional nature of heat pumps. Since they can both cool AND heat, both the battery and the cab. Lots of variables to build in to the cooling loop design.

[@romsa1977]

Intresting to see same test of Yuan Plus for China market, saw on one chinese car forum photo of Yuan Plus charged at 15% with 106 kw !!! (photo taken in 08/2023), seen from unknow source (hope that info is true) that at 23 degrees this blade cells can accept constant charging current of 1.5C so 100 kw charging possible (but how to keep this battery for long time at this temperature ?)

[@thechipsy]

Which Software version is used. The 1.5 available in australia might have solved it already

[@thechipsy]

Other changes with this OTA software update include the following: Improved ventilation function after the air compressor shuts off to prevent fogging after shut-off in cooler temperatures Optimisation of DC charging power, extending high-power charging duration Improved DC charging gun locking communication Improved capability of wireless charging function

[@Gazer75]

This whole system is kind of silly designed. When heating the cabin the other side of the heatpump would be cold and could be used for cooling the battery. A well designed system would use this to alter between what side is used to cool battery.

[@MaurizioLattuada]

I mean guys, here Bjørn is not doing something super exceptional from an end-user perspective: fast charging and keeping the cabin cold. How the hell such issues are happening?

[@SripalTAD]

What app is this i wanna try it on our BYD e6 in india.

[@buixote]

Anyone miss guages? Now we got all these whizzy graphics that seem to have no input from the human factors team. More time spent gazing at the screen, trying to figure out WTF. Think you want to use the heat pump to *cool* the car... that will give less capacity for cooling the battery... right?

[@Per3110]

At 4:35 you mention cars that rapid gate while cabin cooling and charging. The Tesla do the same in 45 degrees. The 2022 MY LR we have needs 5 kW cooling when charging, and in 45 degrees Celsius is cabin cooling, requiring close to 5 kW. The total cooling system can only provide close to 7 kW, so charging is slowed down a lot to maintain battery temperature when SoC is lower than 60%. Again, this is at extreme temperatures, but in Phoenix, AZ is this potentially for 3 months of the year during the daytime.

[@bjornnyland]

45°C is quite hot. The other cars I mentioned rapidgate in only 10-15°C ambient temperature...

[@Per3110]

@@bjornnyland absolutely. It is not common to have 45 degrees. But more the point that staying in the car while charging is maybe not always the best/possible.

[@BigEightiesNewWave]

If a BEV passes his tests, it is OK to drive!

[@briannissen5762]

It looks like the bz4x, wth the battery temp. Problem,

[@randomdriver]

Sounds like a beta software which has not been tested at all before putting it into production

[@tridrean]

♥♥♥

[@tokepanduro7302]

dont redo the 1000 km challenge - this car has too many problems with the battery, heating/cooling, and moisture.

[@Day-night-9]

Has anyone reached over 50 k miles on one of these?

[@Richie5903]

You keep getting charging errors because the BYD cars battery packs have serious issues. I'm telling you , charging that BYD in your garage especially running the heater under it , is extremely dangerous. In China , BYD cars are catching fire all over the place , while charging , while being transported or just driving down the road.

[@peteglass3496]

are you sure that's not just the plug-in hybrids?

[@AltaSonata]

Chinese government doesn't know how to program electeic car 😅

[@vmafferreira6466]

too complicated adopting this type of new electric cars all of them have all sort of problems not yet solved in order to be praticaly for everyday users only for a few who have lots of money and another ICE real car to use and not everyone i would say the majority have a garage to charge the car.

[@jchung5265]

I detest fueling my ice cars for the last 40+ years under a roof at modern ,clean gas stations ! Ditching the gas line with electric cable is unappealing, doing it in the open is even worse! The only way for me to adopt EV is battery swap!

[@samusaran7317]

Why?

[@jchung5265]

@@samusaran7317 Getting old! In North America we like drive through ‘everything’ ! Nio battery swap is close to ideal

[@dyhppyx]

Conclusion... Car sux

[@carlomorischi3435]

The car is just shit, you should not re-do 1000km challenge

[@Rampage1979]

This car is trash

[@torrhthc4103]

Byd sucks. It is geeyly my friends, geely renamed

[@kelvinkelvin9020]

Joker with no knowledge has jus spoken!

[@tridruankham2657]

♥♥♥