Regen Braking Observations

I would really, REALLY like to see those same graphs after the brake ECU fix...

 

I took this voltage data almost two years ago. It shows Prius battery voltage while driving along with SOC as exhibited by the dashboard display. Beyond the article it appears in I don't want to offer any interpretation. By considering the voltage, the battery internal resistance, and a using a bit of imagination, perhaps it will be of modest value.

See RIKLBLOG - My Commute As A Voltage Graph

Richard

 

A newton-meter is a measure of energy. 1 Newton-Meter is one Joule.

Rate of energy per second is Watts.

So, 1 Nm/s = 1 Joule/s = 1 Watt.

Now, I'm a little confused, too. Sixty miles per hour down to 0 mph in one hour dissipates a certain number of Joules (or Newton-meters, if you want) into the brakes. So does sixty miles per hour down to 0 mph in one second, and it's the same number of Joules. However, the watts (Joules/s) is very different for the two.

I would guess that the OP meant N-m/s, that being the "rating" for the brakes, right? Maximum energy dissipated per second?

KBeck.

 

Regenerative braking on the Prius is limited by the ability of MG2 to generate electricity and the ability of the HV battery to absorb the generated electricity. For a given speed and battery SOC this is a steady number, so you can express the maximum regenerative braking figure as energy or power. Both will be equivalent.

Tom