MikkB said:AndyH said:One example of how to abuse a battery of any type: Start with an extremely cold battery pack, don't pre-heat or allow the ICE to run, then drive 20km to work. The poor battery has very high Ri, the chemical reactions are slow, and much of the energy liberated in the cell is converted to heat. Pre-heating or pre-cooling is a battery lifesaver.
Hi AndyH,
I'm struggling to keep up with the technical discussion here, but I'm interested in this comment in the context of the various discussions around how to prevent the ICE from starting up on cold days (not sure if UK cold days qualify as 'cold'). My questions are, if you are able to answer them;
Does the PHEV have battery warming capability, and is this part of why the ICE will sometimes run on startup?
Does an electric 'pre-heat' warm the battery as well as the cabin/windscreen?
How cold does it need to be for battery warming to take place/be required?
Many thanks.
For me 2 points are important :
- Does the lithium m battery suffer any type of damage when used while cold ? (my guess is no ... but happy to be proven wrong)
- What's the point to pre-heat the battery, if battery in cold temperature due to high IR will get automatically warmer ? (unless there is any liquid in the battery which at very low temperature may become solid/crystal , causing some permanent damages like forgetting a beer bottle inside the freezer :mrgreen: )
About our PHEV battery ... as far as I know .. we just have a ventilation system inside the battery compartment ... so no AC with compressor .. no heater in the battery .. as well .. I did not see any air inflow and outflow ... so ... I'm not sure how efficient is our PHEV battery temperature control ....
This battery temperature control ... is also working only when car is charging or active ... in a very hot day, nothing will prevent the battery to get hot inside the PHEV if this is left parked outside under the sun ...
EDIT:
About the ICE kick in ... it has nothing to do with battery ... this is only a design decision from Mitsubishi .. that using electric heater in some condition it will be too slow on heating the cabin, and for this reason, ICE is started for make the cabin warmer in a shorter time.
As far as I know ... AC and Heater for the cabin, are not connected to the battery ventilation ...