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by CZeroOwner
Wed Dec 12, 2018 1:31 am
Forum: Driving the iMiev - Range - Energy Efficiency - Operating Cost
Topic: How good is the car's range prediction
Replies: 6
Views: 94

How good is the car's range prediction

https://i.ibb.co/G0RbdNG/True-Distance-Error.jpg This graph shows the error in the rest or remaining range (RR) predicted by the car. Each dot is a "trip" consisting of continuous data. I found them by dividing my recorded data into trips in which the largest change in the odometer (odo) ...
by CZeroOwner
Sun Dec 09, 2018 12:47 pm
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 34
Views: 12358

Re: Battery Capacity Testing

https://i.ibb.co/0tnrbFd/German-Data1.jpg The black dots in the graph above are battery capacities for 44 German owned iMiev/CZero/iOns collected by datom. There is a link in his post above. The green curve is my model (Ah = 50.4 -1.14*ln(km)) for battery aging discussed in an earlier post. It look...
by CZeroOwner
Tue Dec 04, 2018 1:04 pm
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 34
Views: 12358

Re: Battery Capacity Testing

datom's German data shows a much more drastic decline in capacity than I'm predicting. I seem to remember reading that a Li-ion battery can have a long period with constant capacity followed by a sudden decline. The German data supports this.
by CZeroOwner
Tue Dec 04, 2018 12:01 am
Forum: Batteries and Battery Management
Topic: Battery Capacity Testing
Replies: 34
Views: 12358

Re: Battery Capacity Testing

https://i.ibb.co/BKyFkC9/Capacity-Odometer-graph.jpg In an earlier post BlueLightning suggested measuring the fully charged battery capacity by comparing the change in kWh with the change in SoC while charging. I have done something similar using measurements of amps to the battery and the SoC coll...
by CZeroOwner
Thu Nov 29, 2018 9:41 am
Forum: Batteries and Battery Management
Topic: When and how the car adjusts its estimate of the battery capacity
Replies: 2
Views: 185

Re: When and how the car adjusts its estimate of the battery capacity

I'm fairly sure that canion reports SoC 1 because it never exceeds 100%. SoC 2 does on occasion. EvBatMon reports both and so does OBDZero. I used OBDZero to collect the data.
by CZeroOwner
Thu Nov 29, 2018 7:58 am
Forum: Batteries and Battery Management
Topic: [Solved: Piev's Strange New Pack] Voltage vs SOC graph or table ?
Replies: 13
Views: 561

Re: Pack Voltage versus SOC graph or table ?

If the charger charged the battery to more than 4,1 volts per cell then that would speed up battery aging.
by CZeroOwner
Thu Nov 29, 2018 4:46 am
Forum: Batteries and Battery Management
Topic: [Solved: Piev's Strange New Pack] Voltage vs SOC graph or table ?
Replies: 13
Views: 561

Re: Pack Voltage versus SOC graph or table ?

https://i.ibb.co/XV1ZQmD/Voltage-So-C-1-amp.jpg Here is some data from my car. All of these measurements were recorded when the load on the battery was less than 1 amp. The spread is probably due to varying temperatures. Apparently a combination of 352 volts and 67 % SoC is possible. However 330 vo...
by CZeroOwner
Mon Nov 26, 2018 12:00 pm
Forum: Batteries and Battery Management
Topic: [Solved: Piev's Strange New Pack] Voltage vs SOC graph or table ?
Replies: 13
Views: 561

Re: Pack Voltage versus SOC graph or table ?

https://i.ibb.co/YDdvTXR/So-CVoltage.jpg Here is a graph of Voltage as a function of SoC and current at 25oC. It’s based on lab data for a new LEV50 cell shown in the technical report “Development of a Large Sized Lithium Ion Cell “LEV50” and its Battery Module “LEV50-4” for Electric Vehicle” by Ki...

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