Just to be clear I don't have an issue with my 12v battery but I'm sure one day it will have to be changed regardless. M

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Damir
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Joined: Mon Aug 15, 2022 7:48 pm

Post by Damir »

Just to be clear I don't have an issue with my 12v battery but I'm sure one day it will have to be changed regardless. My question is for you smart cookies in attoland can the 12v lead acid battery be swapped for a lithium battery assuming the onboard charger is suitable?
Daniel
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Joined: Fri Feb 18, 2022 6:26 am

Post by Daniel »

Lithium ion batteries operate at higher voltage, and the onboard charger voltage would need to be increased to satisfy the requirement for lithium ion battery.

In short, no.
Gary
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Joined: Sun Jul 31, 2022 7:52 am

Post by Gary »

BYD service or roadside assist like the NRMA would be the best option for a replacement if or when required

Don’t mix systems
You could void your warranty
David
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Joined: Thu Jun 02, 2022 6:16 am

Post by David »

Lead acid and Lithium share some similarities in their charging profile but should not be interchanged. A lead acid has 3 basic charging stages.
1. Constant current unitil a specified voltage is reached.
2. Constant voltage until another specified voltage is reached.
3.Float charge at yet another voltage.
A Lithium battery uses the first two charge stages but with no float stage.
The problem arises with the "specified voltages", they are different for lithium.
The rule is to never substitute lithium for lead. A lithium charger also has a number of safety features not used with lead.
Steven
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Joined: Sun Jul 18, 2021 5:56 am

Post by Steven »

Modern drop in lithium replacement batteries have on-board BMS that will normally compensate for the lead acid charging profile. However, from what I've seen of the Atto 3 charging system, the computer 'talks' to the battery to see it's charged state then charges as required. Would the lithium BMS confuse the computer?
Kai0
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Joined: Sun Aug 01, 2021 9:25 pm

Post by Kai0 »

A decent 12v lithium CAR battery can manage itself as a regualr battery with onboard BMS. But even LFP lithium ,still have risk due to impact and other factor . So I think this is not good idea . If you do replace 12v lead battery every 3 years, for long term it should be similar cost vs lithium .
Alex
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Joined: Fri Nov 05, 2021 11:26 pm

Post by Alex »

Didn't someone battery die after a week when it was delivered. And BYD service centre replaced it with a lithium battery under warranty . This happened early day of all delivery of car's
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