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Fred_H's Recent Activity

  1. Fred_H liked mudder's post in the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    In the context of Voc->SoC lookup: -battery people would call this region 'flat', as the small voltage delta makes SoC estimation...

    Jul 21, 2024 at 8:01 AM
  2. Fred_H liked ChapmanF's post in the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    If the BMS linearizes the input according to a known curve, then it is doing what it's supposed to, and that's not the same as us...

    Jul 21, 2024 at 8:01 AM
  3. Fred_H liked ChapmanF's post in the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    Certainly, in a graph like that, a person could say "this is almost linear", without sounding bonkers, if talking about the portion...

    Jul 20, 2024 at 1:48 AM
  4. Fred_H liked ChapmanF's post in the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    I'm neither on Jack's team nor a customer; the battery in my car is the NiMH one that Toyota put there. I merely made post #96 because...

    Jul 19, 2024 at 3:32 PM
  5. Fred_H liked ChapmanF's post in the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    Maybe it bothers whoever made the graph. That wasn't me. I picked one of the simpler graphs from a quick search like this: nimh...

    Jul 19, 2024 at 3:05 PM
  6. Fred_H liked Xeico's post in the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    Doesn't the fact that you have 100% = 1.33V bother you at all?

    Jul 19, 2024 at 3:04 PM
  7. Fred_H liked ChapmanF's post in the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    For NiMH? Based on the graphs I'm managing to find in a quick search, that seems to make the word 'almost' do quite a lot of work. [img]

    Jul 19, 2024 at 3:03 PM
  8. Fred_H liked mudder's post in the thread Discussion: NexPower V3 Sodium-ion Battery Announcement.

    I've absolutely enjoyed watching the lithium landscape unfold over the past twenty years. For those that don't mind reading text and...

    Jul 19, 2024 at 5:23 AM
  9. Fred_H replied to the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    Thanks, Xeico. I do not have a complete understanding of all the battery math. I am a little confused by why voltage would be used for...

    Jul 19, 2024 at 5:12 AM
  10. Fred_H replied to the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    Thanks, mudder. "Headroom" was the word I was looking for. In only that particular aspect, would you say that it provides a good margin...

    Jul 19, 2024 at 4:05 AM
  11. Fred_H liked Xeico's post in the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    Almost there [ATTACH] [ATTACH]

    nimh.png sodium.png Jul 19, 2024 at 2:23 AM
  12. Fred_H liked mudder's post in the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    Unless V3 has a true BMS that can disable regen, calling it 'inherently safe' is a misnomer. While using a small portion of the SoC...

    Jul 19, 2024 at 2:13 AM
  13. Fred_H replied to the thread Very slight "rubber band in drive train" sensation.

    You might want to check the number of misfires data, and anything to do with throttle position and MAF (mass air flow) sensor.

    Jul 18, 2024 at 5:37 AM
  14. Fred_H replied to the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    Using some of mudder's preliminary estimations: Gen 2 and 3 Prius limit SOC to between 40% and 80% = 40% maximum usable capacity of the...

    Jul 18, 2024 at 5:02 AM
  15. Fred_H liked mudder's post in the thread NexPower V3 hybrid battery unveil - Sodium-ion battery.

    Note: This post contains numerous assumptions. Until I actually evaluate the hardware, I am merely making educated guesses. I agree...

    Jul 18, 2024 at 3:59 AM