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 CCP EV emergency brake on highway, almost accident, Guess the brand

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mac_mac21
post May 6 2025, 10:34 AM

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But why a drain out 12v battery will trigger emergency brake?


mac_mac21
post May 6 2025, 10:57 AM

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QUOTE(DogeGamingPRO @ May 6 2025, 10:37 AM)
Not emergency brake, just motor lose power and cuz EV motor so instead of cruise it just decelerates, but probably to the driver felt like emergency brake cuz stopped abruptly and can’t move

The 12v controls the connection between the main battery and the motor, so when 12v gone then motor also will lose power from main battery
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But 12v is only for backup if main battery is not functioning

During operation , only main battery is use , while 12v battery is being charge

Got converter to power all the 12v accessories when car is in operation

No way a small 12v battery is responsible for the main operation of an EV during driving

This post has been edited by mac_mac21: May 6 2025, 10:58 AM
mac_mac21
post May 6 2025, 11:07 AM

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QUOTE(Roman Catholic @ May 6 2025, 11:01 AM)
Didn't someone write earlier that once it's below 20%, it will stop providing power ?

Are you sure that the 12V battery is NOT responsible for the main operation ?
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Because got converter to power 12v

Unless the converter is the one that faulty , then power is suck directly from 12v battery , then in the middle of the road 12v battery drain out completely

So complete no 12v for entire system

This post has been edited by mac_mac21: May 6 2025, 11:09 AM
mac_mac21
post May 6 2025, 11:17 AM

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QUOTE(Roman Catholic @ May 6 2025, 11:12 AM)
I thought on the 5 May the SC already determined that it was the fault of the 12V battery. Heck even they identified that on the 2 May itself. Surely if the DC-DC converter was at fault, surely that would be mentioned too no ?
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May be connection between converter to 12v battery is faulty , but to make it sound sensible to end user , just say 12v battery drain out

12v battery have at least 18th month life span even for ICE car with start stop function
mac_mac21
post May 6 2025, 11:29 AM

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QUOTE(DogeGamingPRO @ May 6 2025, 11:21 AM)
From the half-ass service by SC mentioned by the OP I won’t trust it 100% lol

Now escalated to Sime Darby HQ pretty sure end up later will come out with different response
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Of course official statement wont narrow down the specific problem

Im sure they will use common ICE vehicle problem as a comparison to make sure public understand is just a small matter and case is close

No further action
mac_mac21
post May 6 2025, 11:31 AM

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QUOTE(Roman Catholic @ May 6 2025, 11:24 AM)
That is correct generally speaking but on the other side of the coin, there are occasion where batteries lasts just about 12 months period only and when check properly, the mileage had far exceeded 2 or 3 times the warrantied mileage. That is why battery companies placed a restriction on vehicles uses for commercial basis.

If it was the connection that was the issue and blame was intentionally placed on the battery, that is deceit and one must be careful because that is slander already, no ?
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Of course we public will never know unless got internal leak in information
mac_mac21
post May 6 2025, 12:00 PM

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QUOTE(Boy96 @ May 6 2025, 11:56 AM)
After digging thru reddit and seeing similar post
Seal
https://www.reddit.com/r/BYD/s/975nKj0PVn

Sealion7
https://www.reddit.com/r/BYD/s/XP53q9uRLE

Bukan masalah 12v, but masalah with the high voltage system that links the electric motor.

Ofcourse the car wont move anymore once stopped, but the emergency braking part doesnt happen
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Means its the main battery module faulty

But blame it on the small 12v lead acid battery laugh.gif
mac_mac21
post May 6 2025, 12:02 PM

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QUOTE(TheEvilMan @ May 6 2025, 11:59 AM)
Release slow it goes slow, release completely it "brake" or stop, maciam ur rc car lo
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For electric forklift or reach truck, the brake is always on , need to depress pedal to release the brake

Same like dead man switch
mac_mac21
post May 6 2025, 12:04 PM

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QUOTE(yhtan @ May 6 2025, 12:01 PM)
Yes, i read on the manual and it stated there.

It also stated that the LFP battery is recommended to full charge at least once per week.
I guess EV owner has to prevent its battery drop below 20% for safety precautious
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EV owner need to stop thinking 20% battery = 20% fuel in tank petrol laugh.gif
mac_mac21
post May 6 2025, 12:33 PM

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QUOTE(Roman Catholic @ May 6 2025, 12:19 PM)
20% = 20% same what ?

Why battery cannot use until completely Kong ? Last time pakai ICE use until Kong, ok je.
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Then EV owner will kong kali kong on the right lane with surprise pikacu face

 

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