Hello all, I am working on a project with Gen 4 Prius Prime cells and I would like to know if anyone knows what the terminal voltage is at full charge for Prime cells? I'm guessing it will be conservative close or equal to 4.10v but I would really like to know if anyone has scanning software and thus has a hard number for me. I do not need nor want general numbers. I need an exact number hot off the charger. Trying to estimate range in my application based on comparison or Prime to my car at full charge voltage. I cannot divulge what I am working on. Thanks! Jim
It conservative for a reason. It's a small pack for a car of it's size that'll drive at 84 mph in EV mode, if you don't care how long the pack is gonna last. It's not to hard to get the numbers when DrPrius, ScanGauge, Hybrid Assistant or Car Scanner is connected.
Thank you. So, so helpful. Based on measurements I have taken, most manufacturers charge up to 4.07-4.17v to use more of the battery capacity. It isn't too surprising that Toyota is being conservative. It's just how conservative is that which surprises me. They don't want that battery to sit with a high state of charge, ever.
If watching close enough with an app that shows SOC accurately you'll see the first 10% SOC gets used faster than the second 10% SOC and the second 10% gets used up faster than the 3rd 10% SOC. The Primes last 10% SOC flattens out the discharge curve quite noticeably especially when compared to the first 20 or 30%. Not that knowing this would mean much to a normal driver, though could shine some light for somebody interested in pack internals and performance.
