Latest Dr Prius SOC vs Car SOC

This relationship is not linear at all. So, I don't know if I trust the Dr. Prius SOC. What is it at 0%?

 

Add voltage at SOC for a more comprehensive / relative analysis.
Historically, PIP and Prime were around 15% to 85% of the total packs capacity using non OEM tools.

 

And pack voltage is 265 V fully charged? What is the voltage when the engine switches on?

measuring voltage is easier the slower you can drive / no traffic ot other distractions.

 

No, lithium-ion cells are always specced to be 3.7 V, just like carbon–zinc and alkaline cells are always specced to be 1.5 V. The actual voltage will differ depending on SOC. 72 cells × 3.7 V = 266.4 V. Each cell is 51.0 Ah, which is 51.0 Ah × 3.7 V = 189 Wh; therefore, the total capacity of 72 cells is 13.6 kWh.

 

I wonder if Toyota's 2023 Prime Spec sheet here
https://www.toyota.com/content/dam/toyota/brochures/pdf/2023/priusprime_ebrochure.pdf
is off on the traction pack info.
check this out??

SE --- XSE --- Prime-ium​

Dimensions
EXTERIOR (in.)
Overall height/width/length 55.9/70.1/181.1 56.3/70.2/181.1 56.3/70.2/181.1
Wheelbase 108.3 108.3 108.3
Track (front/rear) 61.5/62.2 61.5/62.2 61.5/62.2
Overhang (front/rear) 38.5/34.3 38.5/34.3 38.5/34.3
Ground clearance 5.6 6.0 6.0
Coefficient of drag (Cd) 0.27 0.29 0.29​

​

INTERIOR (front/rear) (in.)
Head room 38.0/36.4 38.0/36.4 38.0/36.4
Shoulder room 55.3/52.8 55.3/52.8 55.3/52.8
Hip room 54.7/51.7 54.7/51.7 54.7/51.7
Leg room 43.2/34.8 43.2/34.8 43.2/34.8​

​

WEIGHTS AND CAPACITIES
Curb weight (lb.) 3461 3516 3571
Seating capacity 5 5 5
EPA-estimated passenger volume (cu. ft.) 91.2 91.2 91.2
EPA-estimated cargo volume (cu. ft.),15 seats up 20.3 20.3 20.3
EPA-estimated interior volume (interior passenger volume + cargo volume) (cu. ft.) 111.5 111.5 111.5

Battery capacity (kWh) 13.6 13.6 13.6
Battery weight (lb.) 284 284 284
Fuel tank (gal.) 10.6 10.6 10.6​

​

TIRES
Size: 195/60R17 S
Size: 195/50R19 S S Spare:
Tire Repair Kit S S S​

​

MILEAGE ESTIMATES
EPA-estimated hybrid mode mpg (city/highway/combined)2 53/51/52 50/47/48 50/47/48
EPA-estimated MPGe2 127 114 114
EPA-estimated EV Mode driving range1 44 mi. 39 mi. 39 mi.​

​

BATTERY CHARGING TIME
Charging time (hr.) (120V66/240V) ~11:00/~4:00 hr. ~11:00/~4:00 hr. ~11:00/~4:00 hr\

________________________________________________________________________

I think shots of DrPrius for the Prime look better in landscape. But that's just me, ya know ?
I finished a drive at 38% SOC and 347.75 volts and Dr Prius said blade voltage was 3.62
3.62 x 95 = 343.9 - I'm not that picky since Dr Prius is supporting so many Toyota hybrid models now.
When / If I get techstream connected, that'll be another story.

I hesitate to post DrPrius screenshots for our Gen 4, I just don't want to confuse things any more than I'm confused already. I hope Profes John does a 2023 Prime traction battery deep dive one of these days. ​

​

 

I don't know if you guys care about how the traction pack cells are configured, size weight, number of banks / blocks / stacks (whatever you want to call them), If there are only 72 cells in series or if it's a 72s 2p pack or if the individual cells are bigger and or heavier than the Gen 4 Prime cells, cause the weight of the 2023 Prime pack is about 5 lbs heavier than than the straight 95s pack of the Gen 4 Prime.

I do like the "cell diff" spec showing in your DrPrius shots. Mine has been holding steady at 0.01 ever since Dr Prius started supporting Gen 4 Prime, and cell stack #2 shows on the DrPrius graph as noticeably lower voltage even at 0.01 volts cell voltage difference, both fully charged all the way down to fully discharged.
Internal Resistance is tricky and can be hard to track, but it can show when the pack gets stressed and when it recovers form that stress (if it ever does).

 

Gen 4 has 95 25.0-Ah prismatic cells, yes, which makes it 8.79 kWh. So, Gen 5's 51.0-Ah prismatic cells are bigger. They probably have a higher energy density because it has been six years.

I don't know what you mean by straight pack. Gen 4 has five 19-cell stacks. Gen 5 perhaps has six 12-cell stacks of its 72 cells, but I am only speculating. At the end, they are all connected in series; so, one bad cell will ruin it all.

 

This was the part of the Gen 5 spec sheet I wanted to post back in #12 that lists the traction pack voltage at 351.5 volts nominal, just like the Gen 4 traction pack. Who knows maybe the spec sheet is wrong?


Mechanical/Performance SE XSE XSE Premium

POWER OUTPUT
Hybrid system net power: 220 hp (90 kW) S S S

ENGINE
2.0-Liter, 4-Cylinder DOHC 16-valve with Variable Valve Timing with intelligence (VVT-i), 150 hp @ 6000 rpm,
139 lb.-ft. @ 4400-5200 rpm S S S
Compression ratio: 13.0:1 S S S
Induction system: Sequential multi-point EFI with Electronic Throttle Control System with intelligence (ETCS-i) S S S

EMISSION RATING
SULEV30 with Transitional Zero Emission Vehicle (TZEV) S S S

ELECTRIC MOTOR
Motor type: Permanent magnet AC synchronous motor S S S
Voltage: 600V maximum S S S



TRACTION BATTERY
Type: Lithium-ion (Li-ion) S S S
Voltage: 351.5V S S S




TRANSMISSION
Electronically controlled Continuously Variable Transmission (ECVT) S S S

DRIVETRAIN
Front-Wheel Drive S S S

SUSPENSION
Independent MacPherson strut front suspension and multi-link rear suspension with front and rear stabilizer bars S S S

STEERING
Electric Power Steering (EPS); power-assisted rack-and-pinion S S S
Turning circle diameter, curb to curb (ft.) 33.4 33.4 33.4

BRAKES
Power-assisted ventilated front disc brakes; solid rear disc with integrated regenerative braking
and Star Safety System™ S S S

 

Yes, that 351.5V is wrong. I guess they missed that number when revising the G4 table cos it's not actually in the table proper, but in a heading. That's the G4 number (95*3.7). G5 nominal voltage is 266.4V (72*3.7). It's 3*24 in series.

They also didn't update the motor voltage - it's been raised to 650V in the G5 Prime (not non-Prime).