Hayk

iTrader: (1)

2010 RX450h
44,700 miles

I noticed the traction battery level indicator doesn’t fill all the way up, so I did some live data for State of Charge with a BlueDriver OBD2 scanner and with Toyota Techstream. During an extensive drive on the highway and around town I tried to charge it back up by coasting and braking as much as possible. The highest battery percentage I reached was 79.6%. Most of the time the battery sits at around 60%.

Is this a sign of a deteriorating traction battery or is the car designed to never go above a certain SoC by design?



BlueDriver Live Data. BAT PWR is the SoC.

Techstream Hybrid Control 1/3

Techstream Hybrid Control 2/3

Techstream Hybrid Control 3/3

Hayk

iTrader: (1)

Found some threads regarding this in the 4th gen RX forums. The consensus is that the batteries are designed to stay under 80% charge during normal operation to leave enough room for regenerative braking. So I guess this must be normal for the 3rd gen as well.

NickSP

Interesting. Will check on my drive home and report here.

NickSP

This is the level on mine

Droid13

The operating range is 40% to 80% when monitored via ODB port. The energy monitor screen presents only the operating range: 80% chg = max bars.

ukrkoz

I had mine several times to full charge. Rolling down long hill in B mode does that. But yes, they are designed to never be fully charged and those gauges are for lay reference only.