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There have been a few issues with charging the 12V battery in PHEV cars. In PHEVs, the 12V battery still powers all the 12V equipment in the car; lights, locks (!), heat/cool, fans, stereo, wiper motors etc. PHEVs normally don't have alternators charging the 12V battery, but have a DC-DC charger that charges the 12V battery from the hi-voltage Li-Ion battery.
In the Volvo T8 (PHEV) set up, this is how the charging take place:
- The hi-voltage Li-ion battery is charged when the external charging cable is connected, when the engine is running, or when breaking.
- The 12V battery is charged through the DC-DC charger only when the engine charges the hi-voltage Li-ion battery pack.
So when the Volvo runs in pure EV mode, the 12V battery is being drained until the motor starts. Many Volvo XC90 T8 owners are complaining about not being able to unlock the car after parking for a while. http://forums.swedespeed.com/showthread.ph...ttery-list The local Volvo dealer told me that one needed to charge the 12V battery "once in a while" with a CTEK charger or similar...
The Mitsubishi Outlander PHEV has in addition to the Volvo the following charging mode:
- Every day (at 2 PM) the 12V battery is topped up by the DC-DC charger pulling power from the hi-voltage Li-Ion battery pack, as long as there are > X % (25?) power left, and the car is locked.
That's why Outlander PHEV owners has reported that they've been able to unlock and start their cars after 120 days of long term parking.
So the big question is how LR have implemented the charging of the 12V battery in the new P400e? We know that ffrr's have a lot of thirsty 12V equipment, and it would be good to know if one can expect hassle free unlocks and starts in the new P400e models after parking - or will the P400e owners need to plug in a CTEK charger as well each fortnight?
Anyone who knows? (LR locally don't have this information)[/list]
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1st Nov 2017 6:03pm
