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How did the SOC and capacity compare on your 5 year old battery?
Right, when you are decelerating or braking, there is free energy available and they try to use this to keep the battery charged rather than using a tiny bit more fuel to do so the rest of the time.The car seems to depend more on the battery than the alternator. It only seems to charge the battery when it needs it. The alternator mostly puts full output out when de accelerating/braking.
Correct. They save a tiny bit of fuel with this nonsense, but at the cost of having to replace the battery more often. I wonder if anyone has analyzed how much energy is consumed in recycling the battery into a new one and how this compares with the energy/fuel savings? Car batteries generally are recycled, but melting and purifying the lead certainly isn't an energy- or pollution-free process.That means the battery is working harder than on older cars where the alternator keeps batteries fully charging at all times. So it’s not surprising a battery after 3 years showing signs of wear.
I've been using a battery voltage monitor plugged into the accessory socket during lockdown. That shows pretty similar results to yours, except when the battery was really discharged when it showed 14.3V for most of a 10 mile drive but on the way back (when the battery was in better charge state) the voltage was 12.7V when on the throttle and 14.3V when off the throttle.Just a bit more info to add, when driving along the voltage at the battery today was a constant 12.9 v ( i believe it’s closer to 14v on old non start stop cars) and then when you release accelerator it jumps to 14.3v. Interestingly when the car was locked up for a few hours the resting voltage reads a healthy 12.7v.
12.9V is not horrible. It's enough to keep the battery from discharging, but it sure isn't going to put a full charge into it either.Just a bit more info to add, when driving along the voltage at the battery today was a constant 12.9 v ( i believe it’s closer to 14v on old non start stop cars) and then when you release accelerator it jumps to 14.3v. Interestingly when the car was locked up for a few hours the resting voltage reads a healthy 12.7v.
I seem to remember reading that the BMS tries to keep the battery no more than 80% charged - to allow room for the "regenerative charging" when off the gas?12.9V is not horrible. It's enough to keep the battery from discharging, but it sure isn't going to put a full charge into it either.
I seem to remember reading that the BMS tries to keep the battery no more than 80% charged - to allow room for the "regenerative charging" when off the gas?
I seem to remember reading that the BMS tries to keep the battery no more than 80% charged - to allow room for the "regenerative charging" when off the gas?
All because the manufacturers need to meet lower emissions targetsyesterday it was mostly charging when deaccerating and braking. A very strange charging system.
Yep, CO2 emissions targets in the EU and Fuel Economy targets (which are essentially the same thing) in the US.All because the manufacturers need to meet lower emissions targets
I hope not - do you mean milli ohm (which is 1,000,000,000 times smaller)Int R : 4.40 mega ohm
Yet some people here complain that the current US administration wants to put a brake on those ever tightening targets.
-Uwe-