GregH
Well-known member
I think Sparky nailed it on the 0x5bc "SOC" number...
From what I've observed the last few days on my car and gleaned from the service manuals, this number is the Remaining Capacity (in Ahs)
It seems to be scaled to 1/4 Ah and has a very heavy hysteresis (tons of regen needed to bump the number up!)
During charge I observed the number increasing at about 90 second intervals when the pack is low and 100 second intervals when closer to full (approximately).
This would be true as the pack voltage increases under a constant power charge... the current would lower and the Ahs would accumulate slightly slower.
I know many of you with slightly more mature packs are getting 281, but mine is still 278.. actually 277 today (!)
The service manuals talk about a Remaining Capacity CAN message from the battery system, but no mention of "SOC" (which we typically think of as a number from 0 to 100%)
The service manuals talk of a nominal pack voltage of 345 volts (3.6V/cell) and a max 393V (4.1V/cell) and absolute max 403V (4.2V/cell) which is all reasonable for a Lithium magnate chemistry.
24000kWh/345V = 69.5Ah... x4 = 278.
I'm guessing each cell in the 4-cell modules is rated at roughly 35Ah and 3.6V nominal.
Now of course Remaining Ah Capacity and State of Charge are pretty much the same thing other than the scale..
I think on my display I'm going to stick with the raw number which I'm calling Remaining Ah Capacity (RAhC) rather than scaling to 100% and calling it SOC...
Thoughts?
From what I've observed the last few days on my car and gleaned from the service manuals, this number is the Remaining Capacity (in Ahs)
It seems to be scaled to 1/4 Ah and has a very heavy hysteresis (tons of regen needed to bump the number up!)
During charge I observed the number increasing at about 90 second intervals when the pack is low and 100 second intervals when closer to full (approximately).
This would be true as the pack voltage increases under a constant power charge... the current would lower and the Ahs would accumulate slightly slower.
I know many of you with slightly more mature packs are getting 281, but mine is still 278.. actually 277 today (!)
The service manuals talk about a Remaining Capacity CAN message from the battery system, but no mention of "SOC" (which we typically think of as a number from 0 to 100%)
The service manuals talk of a nominal pack voltage of 345 volts (3.6V/cell) and a max 393V (4.1V/cell) and absolute max 403V (4.2V/cell) which is all reasonable for a Lithium magnate chemistry.
24000kWh/345V = 69.5Ah... x4 = 278.
I'm guessing each cell in the 4-cell modules is rated at roughly 35Ah and 3.6V nominal.
Now of course Remaining Ah Capacity and State of Charge are pretty much the same thing other than the scale..
I think on my display I'm going to stick with the raw number which I'm calling Remaining Ah Capacity (RAhC) rather than scaling to 100% and calling it SOC...
Thoughts?