No charging option in condo - Need advice

[motdaeng]

7 minutes ago, matchar said:

Here's your homework for today:

https://youtu.be/QRPze4f0gsQ

 

seriously, this video is 5 years old ...

 

the battery technology is changing and  improving very fast ...

please do update your homework, thank you 

Edited April 26 by motdaeng

[matchar]

14 minutes ago, motdaeng said:

 

seriously, this video is 5 years old ...

 

the battery technology is changing and  improving very fast ...

please do update your homework, thank you 

Why you need to charge LFP to 100%

Ok so I have seen many questions lately about LFP and charging to 100%.

The battery cells do not have an inherent requirement to be charged to 100%

The reason you should still charge to 100% at least once a week, is that the BMS (battery management system) will lose track over time of where the state of charge is.

Why does this happen then, and why don't the non-LFP batteries need it?

It comes down to the voltage curve.

LFP has a very flat curve, or in this extreme example of the attached photo, maybe even fluctuates up in the middle of the discharge curve. (Not very common, but illustrates the issue at hand)

This mean that the BMS cannot rely on voltage alone to determine SoC. However this then means that it has to use the Ah in and out to determine how much is left. The problem with this is that the available Ah also fluctuates with factors like temperature and discharge rate.

This is why you need to charge to 100%, to give the BMS a reliable point to start counting down from. As the battery is charged to full, the voltage spikes, and this tells the BMS that the battery is full.

NMC and most other lithium batteries have a more linear curve, which allows the BMS to use the voltage also to determine the current SoC, which negates the need for this calibration charge.

Hope this helps.

https://www.reddit.com/r/TeslaModel3/comments/1b7dr08/why_you_need_to_charge_lfp_to_100/

 

Updated especially for you already... you're welcome!

[Gweiloman]

22 hours ago, Henryford said:

How many condos would be happy to install a gasoline pump in an underground car park just below occupied condos? That's what most people think about the idea of EV charging stations in their condo.

Unsurprisingly, like a lot of anti-EVers, you don’t know of what you speak.

 

Lots of condos and apartments have chargers installed in their car parks.

https://www.straitstimes.com/singapore/transport/ev-chargers-installed-at-700-hdb-carparks-new-public-fast-chargers-in-toa-payoh-punggol

 

17 hours ago, Robert Paulson said:

Get rid of the ridiculous car you have is my advice 

What’s ridiculous is the amount of air borne pollution caused by ICEVs, especially diesel. I imagine breathing the air in downtown Bangkok nowadays, especially with the heat, must be pretty unbearable.