Extended Status - OVMS User Manual

OVMS: Renault Twizy User Guide

Extended Status

The Twizy includes the following information in the SMS command "
battery status text messages sent to the App:
Charge state: one of
•
◦ "Not charging"
◦ "Charging"
◦ "Charging Stopped" – if charge was interrupted
◦ "Charging, Topping off" – charge process is in last stage (constant voltage)
◦ "Charging Done" – if fully charged
Charge power sum (Wh)
•
◦ ...at the battery plus grid energy estimation in Wh (V3.6)
Time estimation for full charge (minutes)
•
Range (unit as configured)
•
SOC (State of charge in %)
•
Odometer (unit as configured)
•
SOH (State of health in %) (V3.8.3)
•
Battery capacity estimation in % and Ah (V3.6)
•
Being able to rely on a charge working as planned is crucial. If charging is interrupted, the OVMS
will automatically send the extended status message by SMS and/or IP (as configured). So you'll be
informed immediately if some fuse blows or someone pulls the plug.
The status message will also be sent if charging starts after an interrupt, and when fully charged.
You may also configure a minimum SOC alert (using standard
sufficient range and/or SOC (see "Charge alerts").
Since V3.6 there's also an option to request the status message for every charge start. This is useful
to monitor remote or time controlled charging, for example in combination with the EDImax or
Homematic home automation scripts. To let the module send the charge start status message, add 64
to #14 (car bits). Since
FEATURE
off" stage.
Charge time estimation
The SOC value of the Twizy (any Lithium SOC value to be precise) is a battery model based
estimation and will be quite wrong sometimes (too low normally, especially on low temperatures).
The Twizy recalibrates it's SOC to 100% when full charge is reached.
As the charge time estimation is designed to be on the safe side, times normally will be better by 5-
30 Minutes depending on the actual cell state and the amount of error in the Twizy estimation.
Due to the Lithium chemistry and battery pack structure (cell balancing), the charge speed is nearly
linear up to ~94% SOC and much slower on the last ~6%. A typical charge curve looks like this:
V3.8.3 this also enables the notification for entering the "topping
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" response as well as
STAT?
#9), and a charge alert for a
FEATURE