def get_battery_curve_fig(row: dict, car: Car):
start_date = dash_date_to_datetime(row["start_at"])
stop_at = dash_date_to_datetime(row["stop_at"])
conn = Database.get_db()
res = Database.get_battery_curve(conn, start_date, stop_at, car.vin)
conn.close()
battery_curves = []
if len(res) > 0:
battery_capacity = res[-1]["level"] * car.battery_power / 100
km_by_kw = 0.8 * res[-1]["autonomy"] / battery_capacity
start = 0
speeds = []
def speed_in_kw_from_km(row):
try:
speed = row["rate"] / km_by_kw
if speed > 0:
speeds.append(speed)
except (KeyError, TypeError):
pass
for end in range(1, len(res)):
start_level = res[start]["level"]
end_level = res[end]["level"]
diff_level = end_level - start_level
diff_sec = (res[end]["date"] - res[start]["date"]).total_seconds()
speed_in_kw_from_km(res[end - 1])
if diff_sec > 0 and diff_level > 3:
speed_in_kw_from_km(res[end])
speed = car.get_charge_speed(diff_level, diff_sec)
if len(speeds) > 0:
speed = mean([*speeds, speed])
speed = round(speed * 2) / 2
battery_curves.append({"level": start_level, "speed": speed})
start = end
speeds = []
battery_curves.append({"level": row["end_level"], "speed": 0})
else:
speed = car.get_charge_speed(row["end_level"] - row["start_level"],
(stop_at - start_date).total_seconds())
battery_curves.append({"level": row["start_level"], "speed": speed})
battery_curves.append({"level": row["end_level"], "speed": speed})
fig = px.line(battery_curves, x="level", y="speed")
fig.update_layout(xaxis_title="Battery %",
yaxis_title="Charging speed in kW")
return html.Div(Graph(figure=fig))
def get_battery_curve_fig(row: dict, car: Car):
start_date = dash_date_to_datetime(row["start_at"])
stop_at = dash_date_to_datetime(row["stop_at"])
conn = Database.get_db()
res = Database.get_battery_curve(conn, start_date, car.vin)
conn.close()
res.insert(0, {"level": row["start_level"], "date": start_date})
res.append({"level": row["end_level"], "date": stop_at})
battery_curves = []
speed = 0
for x in range(1, len(res)):
start_level = res[x - 1]["level"]
end_level = res[x]["level"]
speed = car.get_charge_speed(start_level, end_level, (res[x]["date"] - res[x - 1]["date"]).total_seconds())
battery_curves.append({"level": start_level, "speed": speed})
battery_curves.append({"level": row["end_level"], "speed": speed})
fig = px.line(battery_curves, x="level", y="speed")
fig.update_layout(xaxis_title="Battery %", yaxis_title="Charging speed in kW")
return html.Div(Graph(figure=fig))