Ah Boy are you still using this same car or already sold?

Same car la ayam happy with this car why sell

jgn jgn, other ev also do this same stunt lol 

Tesla woso


https://www.facebook.com/share/p/18spa5etRV/

Told you it wasn't the 12V battery. While the whole /k talk about 12V the battery, I was the one who mentioned it cannnot be the 12v battery.

Where is that guy who managed a fleet of cars and claim how he know best and wanted to put me in my place when I said it wasn't due to the 12V battery. Need to dig back the post.

Common sense will tell you that 12V battery is expected to fail and the software algorithm will not be so stupid the allow such a simple battery malfunction to cause emergency brake.

Told you it wasn't the 12V battery. While the whole /k talk about 12V the battery, I was the one who mentioned it cannnot be the 12v battery.

Where is that guy who managed a fleet of cars and claim how he know best and wanted to put me in my place when I said it wasn't due to the 12V battery. Need to dig back the post.

Common sense will tell you that 12V battery is expected to fail and the software algorithm will not be so stupid to allow such a simple battery malfunction to cause emergency brake.

Don't have to reply to that idiot.

The ps is very clear its the battery

the car put itself in Electronic Parking Brake when I open the door, while it is in Drive.

Safety feature to prevent run a way car. Driver cannot simply just wedge a stick and jump out from driver door.

Do a door sensor need to be that sophisticated? What the door sensor use for?

1) door sensor can be just a contact switch. An On/Off signal to the ECU. No electronic require inside. Keep it simple, cheap and failsafe.

2) If there require some crazy electronic stuff inside the switch, the circuit can be design to take wide range of voltage. 10-14.4v is enough to operate and tackle the low/high voltage of the battery. Battery don't drop dead till 0v.

.
Fyi, .......

Gemini AI Overview

Yes, a weak 12V battery can potentially cause door sensors to fail or malfunction. Sensors rely on a consistent and adequate voltage supply to operate correctly. If the battery is weak or failing, it may not provide the necessary voltage for the door sensor to function properly.

Here's why a weak battery can affect door sensors:
- Insufficient Voltage:
Sensors require a specific voltage to operate. A weak battery may not provide enough power, leading to unreliable or inaccurate readings from the sensor.
- Intermittent Operation:
Even if the battery isn't completely dead, it might fluctuate in voltage, causing the sensor to operate intermittently or incorrectly.
- System Malfunction:
A weak battery can also affect other vehicle systems, including the car's computer, which might influence the operation of the door sensors.
- Other Factors:
While a weak battery is a common cause, other factors like wiring issues, sensor failures, or problems with the vehicle's computer can also contribute to sensor problems.

If you're experiencing issues with your car's door sensors, it's always a good idea to have your battery checked and ensure it's providing the necessary voltage. 
.

Nope.

Sensors if they are electronics, usually 5V and 3.3V requires to be regulated. This regulation comes from buck converters. 
When the EV is powered on the onboard DC/DC takes over , and the battery acts more like a capacitor rather than a battery.

Nope . Electronic sensors are regulated.
A car computer or ECU do not use direct 12V. It goes through buck conversion or down conversion. 
The regulator will work all the way down to 6-7V assuming the output is 5V.
And all this design criterias like load dump, voltage fluctuations are all already taken care off by the ECU power supply unit.

Also it is CLEARLY stated in the article , that it is not caused by the 12V battery.  So why are you trying so hard to try to link it back to the 12V battery again?

I think so.. the emas system is the same lah.

But BYD if the big battery below 20% charge, it wont charge the small 12v battery, dunno if geely program it to be the same

In a already started car ...NO. The DC/DC converter will take over the battery when it is started.
Guess what, the ATTO3 was moving at 100km/h an hour, it has started.
This is a perfect example of not understanding the article.
You are taking a parked, standby vehicle scenario where the main battery is disconnected .
When the main battery is disconnected there is no DC/DC charging to the lead acid battery. This behavior is exactly the same as in an ICE car. If it is dead the car cannot start and a warning would be given.

When it has started and moving at 100km/h like the ACTUAL SCENARIO with the BYD ATTO3 , the battery behaves like a capacitor, whatever consumed will be replenished by the onboard DC/DC converter. You're talking as though the 12V is an AA battery where it never gets recharged and once it dies in the middle of the road it dies. First things first do you understand what a dc/dc converter does? It takes the main battery and charges the 12V lead acid while it's on the go. So if the whole system is powered by the on board DC/DC converter and charging the lead acid battery, why would the battery fail while it is moving?
.

"The 2 could be very related". Yes and my headache could also be related to the 12V battery fault.LOL.
Official explanation already there and you still want to try to plotek.
Are you so afraid of BYD damaged reputation?

Another perfect example of not understanding the scenario.

BYD will not charge the 12V battery below 20% in a PARKED, STANDBY scenario. . 
In a car parked standby scenario, the main battery will "periodically" charge the 12V battery once the 12V battery crosses a certain voltage threshold.
The 12V will still drain.. slowly because it needs to keep the main computer alive.
These periodic charging will drain the Main battery until 20% ( i think should be lower than this), and then stop "topping up" the 12V battery once it goes below a certain %.

https://www.geekzone.co.nz/forums.asp?forum...&topicid=303207
You can read about it here.
This rule DOES NOT apply to a car turned on and running on the highway.

Why would they stop charging the battery at 20% and keep air-cond on ? They let you drive at 100km/h but stop charging the battery ? LOL  
Air cond consumes like 10X-20X more power and the software choose to keep air cond alive and stop charging the 12V while moving at 100km/h?
Seriously you guys actually believe that the software will keep all the non-critical system alive but stop charging the 12V battery?
With the air cond blower , In car entertainment, lcd screen coming from 12V, how long do you think it will last? The batteries are a lot smaller then ICE cars . How long do you think it will last?

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From your geekzone forum link on page 2, .......

arthurgeek:

One or two BYD Atto 3 owners have mentioned in FB posts that, if the main battery falls to a state of charge of less than 15%, the 12V battery will no longer be topped up by the main battery. 

If this is true, it might pay owners to make sure the main battery is immediately charged up once it gets to a SOC of less than 15%. Can anyone confirm whether EVs stop charging the 12V battery when the SOC of the main battery drops to quite a low level.


Obraik:

A Tesla will. Once the main pack gets low (I can't remember the exact number, but it's very low) it will stop maintaining the 12v/15v battery and it will warn that if you leave the car that it might not start again if you don't charge it.

= it seems, even when being driven (= eg EV car not being charged at home), the 12V battery will not be charged by the BIG battery when the latter has <15%-20% charge.

Gemini  AI Overview

Yes, the 12V battery in a BYD Atto 3 can fail while driving, though it's not necessarily the primary cause of sudden braking issues reported by some owners. A low 12V voltage can potentially cause the vehicle to stall or experience other power-related problems. 
.

No,  Where does it says it was being driven? What logic is if EV car not being charged at home = it is being driven. You cannot park the car , lock the car without charging the car? 

Yes , you leave the car parked and not charged with sentry mode on for eg you leave it for a week at 30% charge , after it reaches 15% charge it will not charge the battery while it is parking.

Same story here when parked.

It's funny the whole thread is about jumpstarting their 12V battery and not being able to start their car, which means they can't even start their car in the first place but you chose to believe the narrative that BYD will keep the aircond, allow you to blast the music , allow you to drive at 100km/h but not charge the 12V while on the move. 

.
No. Where does it says it was being parked.?

Where does the whole thread say it is about jumpstarting the 12V battery after BYD Atto 3 cars broke down while being parked and not while being driven.?

Fyi, .......

https://evpowerhouse.com.au/blog/byd-atto-3...ems-and-issues/ - Common BYD Atto 3 Problems and Issues - 29 Dec 2023
.... Power failure issue

Some owners have experienced a terrifying situation – the car suddenly losing power with no warning. The culprit? A depleted starter battery with a critically low voltage reading. While a simple recharge solved the immediate issue, concerns remain about customer support’s handling of battery replacement options. ...

.... Owners have also noticed the 12V battery draining more quickly, particularly when the main traction battery has a low charge. While the exact cause remains under investigation, these two issues could be pointing towards a potential problem with the car’s electrical system. ...

12V battery issue

Frequent complete discharges of the 12V battery, leaving the car stranded, are a recurring problem. While trickle charging offers a temporary fix, the battery quickly drains again. Owners are seeking information about the 12V battery’s charging cycle in EVs and when it receives a top-up from the main battery. ...
.

So are you saying the problem that he is having is while driving ? So you cannot understand  from his text that it is happening during standby mode?
lockout  = James May was outside the car and cannot get into the car. Not driving. Cannot understand this ? 
So are you saying you cannot understand what change into gear or locked in P means? So you conclude that they are driving at 100km/h based on this statement ? LOL

Please show me exactly where in the evpowerhouse link above said that low 12V battery would cause an emergency brake from 100km/h in 6 seconds. 

.
Fyi, .......

https://evpowerhouse.com.au/blog/byd-atto-3...ems-and-issues/ - Common BYD Atto 3 Problems and Issues - 29 Dec 2023
.... Power failure issue

Some owners have experienced a terrifying situation – the car suddenly losing power with no warning. The culprit? A depleted starter battery with a critically low voltage reading. While a simple recharge solved the immediate issue, concerns remain about customer support’s handling of battery replacement options. ...

Yes . The BMS is not agressive enough in checking the state of the 12V battery when the car is parked. Byd released a firmware fix to increase the frequency of checks and top-ups when the car is parked and standby. Nothing in this statement shows that 12V battery will cause an emergency brake. Why are you highlighting random statements that doesn't support what you are claiming.

.
SteveNXZ

.... The BMS is not aggressive enough in checking the state of the 12V battery and recharging it from the traction battery.  BYD are releasing a firmware fix for this issue in early February.  This will increase the frequency of checks and top-ups, but doesn’t mention whether the low voltage threshold (around 11.5V) will be changed. ...  

Gemini AI Overview

The traction battery charges the 12V battery in electric vehicles when the 12V battery voltage drops below a certain threshold. This typically occurs when the car is not plugged in and parked for a few days, or when the 12V battery is not being adequately recharged by regenerative braking.  The Hybrid/EV Powertrain control module (HPCM2) monitors the 12V battery and will initiate a "battery maintenance" mode to charge it if necessary. 

https://www.facebook.com/share/p/15QFWeVTzf/

AI TLDR:


Original Text:
Pengalaman paling MENGERIKAN bagi kami sekeluarga apabila kereta BYD Atto 3 secara tiba-tiba brek mengejut ketika sedang memandu di lorong kanan lebuhraya!

Pada 1 May lalu, kami dalam perjalanan dari Melaka ingin pulang ke kampung di Penang dan singgah di Kajang sebentar untuk menghadiri rumah terbuka. Sewaktu di lebuhraya Cheras-Kajang, kereta dengan secara tiba-tiba brek mengejut tanpa ada sebarang amaran atau apa-apa 'indicator'. Di skrin panel kereta pula menunjukkan "Power System Failure" dan keempat-empat tayar kereta seperti di kunci. ...

Pada 4 petang mereka memberitahu kereta kami mempunyai masalah bateri 12V dan memerlukan masa beberapa hari untuk membaik pulih dan melakukan pemeriksaan. ....


Sekian dari encik husband (pengguna Byd 10 bulan).

.
Fyi, .......

https://evpowerhouse.com.au/blog/byd-atto-3...ems-and-issues/ - Common BYD Atto 3 Problems and Issues - 29 Dec 2023
[color=green] .... Power failure issue

Some owners have experienced a terrifying situation – the car suddenly losing power with no warning. The culprit? A depleted starter battery with a critically low voltage reading. While a simple recharge solved the immediate issue, concerns remain about customer support’s handling of battery replacement options. ...

Inaccurate The article did not say the terrifying situation is an emergency brake from 100km/h in 6s.
Can you show me exactly the full statement and sentence stating that the terrifying situation is an emergency brake from 100km/h and not create from your own stories or assumption.

Inaccurate The BMS detection for low voltage is only for when the car is parked and standby. When the car is being driven , a constant voltage of 13.8V is being delivered  to the battery which means is continuously charge. No waiting for it to be low voltage .
It is 2 different modes for 2 different scenarios.  Try to think why they use periodic mode for parked and not for driving.

Here is a guy who logs his battery voltage for the past 3 days and he clearly explains what is going on. And it perfectly shows that during driving the voltage is constant 13.8V which means continuously charging. 

Inaccurate . No it is not similar.
The article did not say the terrifying situation is not similar emergency brake from 100km/h in 6s.
Can you show me exactly the full statement and sentence stating that the terrifying situation is an emergency brake from 100km/h and not create from your own stories or assumption.
Can you tell me also why did you create the link door sensor malfunction is due to 12V battery.
If it was failing it would have not been able to start. And it shows that you were wrong when you made the statement below.

Irellevant statements. So? it drops the range so ?  of course you're using power to heat up the cabin. Also EV uses heatpump which is powered by the main traction battery not 12V.
Even the irrelevant statements that you make is not accurate.

And... what does it prove? Are you claiming because the 12V battery fail in an abnormally long ship freight from China therefore it must be the same rootcause here?  Critical thinking is lacking don't you think.
You are currently randomly showing 12V failures and then say see if other people 12V can fail , this must be the exact rootcause of the BYD atto3 failure in the malaysia scenario.

No, it's very similar lar.

.
It proves that the 12V battery in EV cars can fail for various abnormal reasons, resulting in car breakdowns while parked or driving, .......

https://insideevs.com/news/752720/ev-12-vol...ttery-problems/ -
The big, expensive batteries are dead reliable. It's the puny 12-volts that are causing problems. - 6 March 2025
.

No it's not.

Yes but in the case of the current atto3 it is not. You can't take another incident and say this atto3 which happen in Malaysia must have the same issue.
Your gemini AI has been proven wrong many times. Why are you still using it when it is so unreliable?

Again you are creating failure links by yourself

eg:-

Why would 12V battery fail when it is powered by Dc/DC converter at 13.8V. So Inaccurate. 

Any electronic door sensor are voltage regulated. So inaccurate.

You can go round and round and repeat your same story and I will counter you the same way.

I also can create stories :-
12V battery fail ---> LCD light flikering ---> I get headache. LOL

.Repeating. Countered.

Yes if you use your critical thinking and common sense, it is also logical that the whole LCD screen all the lights and everything will also fail. Means nothing will turn on. Suddenly only door sensor fail but all the processor , memory , radio system is working .. LOL.
But the LCD screen is still on, the processor is still working. So your logic fail again. Btw there's no 5V battery , I understand similar to the bozo Catholic guy who claims to know electrical systems, you cannot understand what voltage regulated system means.

Man I can't believe a Christian claiming to be an expert of electrical system managing a "fleet of cars" got himself wrong when he doesn't even know a DC/DC converter is the one powering the whole car up when it is running.
I wonder if he knows that you can remove the battery after the car is running because the alternator is the one keeping the system alive.
LOL, imagine thinking asking a group of people to change battery makes him an electrical expert... LOL.
It's like saying he cooks Maggi mee at home and therefore he's a Michelin star chef. 
And then when he can't counter with facts, there comes the name calling.
Imagine a Christian after their arrogance and mistakes , can't take the ego bruise and resort to sex toy name calling.
Well it looks like even the Christian thing is a facade.

 

Inaccurate. Repeating the same story and not recognizing parked and turn on scenario. Countered and explain many times before.

Also noticed I used the word alternator instead of DC/DC converter because I was referring to engine cars , they are powered by alternators not DC/DC converters.

BYD already sell like what? 10 thousands of cars the past 3 years in Msia?

If a simple 12v battery failure caused this, there should be at least few hundred cases like this have occured 🤔

When you are selling batteries, it's in their best interest to scare consumers to change their batteries every 6 months.

Just like another guy ifourtos or something like that, works as a solar system salesman, therefore constantly promoting the use of EV.

It's funny that some Christian battery seller who claims to be an electrical expert , did not believe the onboard DC/DC converter is the one taking over the charging and powering up the whole system when it is on.

Here is one example where a dead battery and main traction battery below 20% occurred while parking.
The solution? Jumpstart the battery and once it is turned on the DC/DC converter took over and provided a constant 13.8V even when the main traction battery was below 20%.
(this proves lurkingaround and the Christian battery seller inaccurate).

The whole DC/DC system with main traction battery below 20% was able to keep the battery up and allowed the owner to drive home and charge the battery.
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