QUOTE(Area51SE @ Jan 31 2013, 09:40 PM)
Guys, today I was stuck in the jam. Normally driving I would have around 6 bars of battery left (Full is 8 bars). So as I get stuck longer, it drops to 5 bars. Then all of a sudden later it drops to 1 bar which shocked me. After that as I move longer, the battery gets charged very fast and back to 6 bars.
Is this a normal thing? Do you guys encounter the same thing also?
I went back home and started revving the car to 3k RPM to charge the battery fully as I remembered that my SA actually said to do it 1 time every month which I actually forgot. It took quite sometime to actually rev from 7 bars to 8 bars. Does this have any relation to why the battery drops from 5 bars to 1 bar in few seconds?
One thing to note is that the IMA battery readout is not a real-time readout of the battery capacity. There will also be cases where slow drive or car park driving will deplete the IMA battery much faster, due to low rev ranges (IMA motor only helps at lower rev range to propel the car along). High speed runs actually charges the battery faster due to higher RPM on the stator magnets, thus you won't notice that the battery gets depleted. On the opposite end, the battery gets depleted at low rev ranges as the battery could not get charged back in time (low speed at the stator magnets), plus the constant use of the IMA motor to propel the car at low rev ranges.Is this a normal thing? Do you guys encounter the same thing also?
I went back home and started revving the car to 3k RPM to charge the battery fully as I remembered that my SA actually said to do it 1 time every month which I actually forgot. It took quite sometime to actually rev from 7 bars to 8 bars. Does this have any relation to why the battery drops from 5 bars to 1 bar in few seconds?
For example, for my case, i will fully discharge the battery if I drive around Sunway Piramid's car park (just by searching 2 levels) and the auto-charge function will kick in whenever the car stops rolling (stationary). As long as there is no errors being displayed, the IMA is still functioning fine.
Second thing to note in case you are worried, is that the IMA fan have 2 speeds AFAIK, the high and the very high speed. The very high speed makes you think that there is a vacuum cleaner in your boot, but it disappears once the battery has been cooled down and re-charged.
Lastly, I do not see anywhere in the manual to ask us to fully recharge our IMA battery ourselves by revving the car to 3k rpm stationary, any idea if there's any reference materials besides the mechanic's "say-so"? I have never done it before, and don't plan to do it... it defeats the purpose of having a car if we have to constantly do this (hybrid some more, supposed to save the environment by reducing pollution). The main idea of the IMA is to re-cycle the kinetic energy which is normally lost during driving, thus improving fuel economy, but by revving the car stationary it sort of defeats that purpose. I would suggest instead that you enjoy your car every bit of the way... it is a really fun car to drive.
Feb 1 2013, 09:50 AM

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