The API shows a value named "battery health level". What is it?

[AltadenaAir]

I love the Home Assistant integration (thanks for all who contributed!)

One of the values that is reported (and can be graphed) is something called "Battery health level". Mine reports at 96.2%.

Thing is, I had my battery replaced a couple of weeks ago, but the HA historical data shows it was reporting that same (or similar) value from way before the battery reported it was sick.

My naive guess is that a metric with this name would have something to do with how many modules report perfect voltages or something similar. But then it makes little sense that the value was unaffected when my battery became sick or that my new battery has the same value.

Ideas? Direct knowledge?

 

[Bobby]

I love the Home Assistant integration (thanks for all who contributed!)

One of the values that is reported (and can be graphed) is something called "Battery health level". Mine reports at 96.2%.

Thing is, I had my battery replaced a couple of weeks ago, but the HA historical data shows it was reporting that same (or similar) value from way before the battery reported it was sick.

My naive guess is that a metric with this name would have something to do with how many modules report perfect voltages or something similar. But then it makes little sense that the value was unaffected when my battery became sick or that my new battery has the same value.

Ideas? Direct knowledge?

Nobody is exactly sure. At one point, we thought it was related to degradation but we were later told it’s not.

 

[borski]

We don’t know. Anyone that tells you they do and doesn’t work for Lucid is just speculating.

 

[hmp10]

My understanding is that over time battery cells get out of balance and need to go through a protocol to rebalance them. I'm wondering if this has something to do with that, since @Bobby has information that it's not about degradation.

It's odd, though, that they would label it "battery health", because that might sound more ominous to many owners than labeling it as the metric it actually is . . . whatever that is.

 

[tonybot]

I recently had a mobile technician test my battery health while performing another service. He connected to the car using Ethernet, worked with someone from engineering, and collected a bunch of diagnostics. He confirmed that the battery health is indeed at 95.5%, which is within spec and not unusual for my 3-month-old car. I don’t know exactly how this percentage is calculated and whether it excludes the reserves, but I wanted to share that the API number and the diagnostics they performed showed the same numbers.

 

[Bobby]

My understanding is that over time battery cells get out of balance and need to go through a protocol to rebalance them. I'm wondering if this has something to do with that, since @Bobby has information that it's not about degradation.

It's odd, though, that they would label it "battery health", because that might sound more ominous to many owners than labeling it as the metric it actually is . . . whatever that is.

To be clear, I didn’t say it’s not about degradation… I think it actually is… We are just not privy to the calculations and the accuracy of the number.

 

[Adnillien]

Thing is, I had my battery replaced a couple of weeks ago, but the HA historical data shows it was reporting that same (or similar) value from way before the battery reported it was sick.

For most of the recent battery replacements, Lucid is using refurbished modules from prior battery replacements. My service center told me that the replacement battery is selected to have very similar degradation to the battery being replaced. Hence, you will only see a slight change.

 

[borski]

For most of the recent battery replacements, Lucid is using refurbished modules from prior battery replacements. My service center told me that the replacement battery is selected to have very similar degradation to the battery being replaced. Hence, you will only see a slight change.

Remanufactured, not refurbished. Important distinction.

 

[Adnillien]

Remanufactured, not refurbished. Important distinction.

Yes agreed, it is full remanufactured with new BMS components.

 

[Bus Driver]

For most of the recent battery replacements, Lucid is using refurbished modules from prior battery replacements. My service center told me that the replacement battery is selected to have very similar degradation to the battery being replaced. Hence, you will only see a slight change.

This must be a really recent development. I had my battery back replaced earlier this year. Lucid Service in Costa Mesa CA assured me that it would be a brand new battery, and not a refurbished or remanufactured, or re-anything one.

 

[SaratogaLefty]

If it was replaced this year it most likely was a remanufactured battery.

 

[larrycpa]

Driving Your EV Like A Lunatic Might Help Its Batteries Last Longer: Stanford Study - The Autopian

Researchers at the SLAC-Stanford Battery Center have found that we might be testing EV battery cell lifespan all wrong.

www.theautopian.com

 

[ME2U]

Like the way they think ! That's how I use my EV's so good for me (us).

 

[Bus Driver]

For most of the recent battery replacements, Lucid is using refurbished modules from prior battery replacements. My service center told me that the replacement battery is selected to have very similar degradation to the battery being replaced. Hence, you will only see a slight change.

Ah. Different from what I was told this time last year, that I would be getting “a brand new battery”.

I pressed the point with the Lucid service advisor I was working with at the time in Costa Mesa. I asked him to confirm that it was a brand new battery I was getting. And he blithely did so.

Needless to say I was a little puzzled to see that only a month after my brand new battery replacement, my API “battery healthy” showed 96%. I believe that’s where it still is, one year later.

 

[Bobby]

Ah. Different from what I was told this time last year, that I would be getting “a brand new battery”.

I pressed the point with the Lucid service advisor I was working with at the time in Costa Mesa. I asked him to confirm that it was a brand new battery I was getting. And he blithely did so.

Needless to say I was a little puzzled to see that only a month after my brand new battery replacement, my API “battery healthy” showed 96%. I believe that’s where it still is, one year later.

Mine also shows 96% as of today. It's the original battery after 2 years, 4 months, and 32k miles.

 

[Buffalo Bob]

For anyone who may be interested, here is the battery data for my 2023 Pure AWD at 13 months and 12.7k miles, along with a few comments...

"batteryState": {
"range": 532, (Kilometers, so 331 miles.)
"chargePercent": 81.60000121593475, (331 miles range at 81.6% SOC suggests 405.3 EPA miles at 100% vs. window sticker 410 EPA miles, or 98.9%.)
"kwHr": 70.56999842263758,
"capacityKwHr": 86.49999806657434, (Would be interesting to know how this compares to the car's stated 92 kWh battery)
"batteryHealth": "WARNING_OFF",
"lowChargeLevel": "WARNING_OFF",
"criticalChargeLevel": "WARNING_OFF",
"unavailableChargePercent": 0,
"batteryPreconStatus": "BATTERY_PRECON_UNAVAILABLE",
"batteryPreconTimeRemaining": 255,
"batteryHealthLevel": 97.4000014513731, (Would be interesting to know how this percentage (if it even is a percentage) is determined.)
"evsePowerLimited": 0,
"bmuSoftwareVersionMajor": 4,
"bmuSoftwareVersionMinor": 13,
"bmuSoftwareVersionMicro": 34,
"batteryCellType": "BATTERY_CELL_TYPE_LG_M48",
"batteryPackType": "BATTERY_PACK_TYPE_AIR_18",
"maxCellTemp": 32.100001968443394, (Would be interesting to know if this is from the last drive or the life of the vehicle. Parked vs. active?)
"minCellTemp": 29.10000192373991 (Same as above.)

 

[ME2U]

How do get those infos or what tool do you use ? I'm looking all over the places to find them

 

[Buffalo Bob]

How do get those infos or what tool do you use ? I'm looking all over the places to find them

Run the following URL, using your Lucid Motors (not forum) login... https://testmycode.cc/

 

[ME2U]

Run the following URL, using your Lucid Motors (not forum) login... https://testmycode.cc/

Works great ! Thanks Thanks Thanks and BRAVO to those who worked on it.

 

[segbrk]

"maxCellTemp": 32.100001968443394, (Would be interesting to know if this is from the last drive or the life of the vehicle. Parked vs. active?)
"minCellTemp": 29.10000192373991 (Same as above.)

These are from whenever the car was last awake. Interesting to watch while preconditioning or charging.