Adding external charger to hybrid battery.

[Mavster Mechanic]

Sounds like exactly the time to waste a bunch of energy when parked doing some emissions junk, but no, it does that when the HVB SoC is already low.

Not sure what you mean.

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[wax87]

Watched a YouTube video where they added an external charger to an older Ford Escape hybrid high voltage battery. The job was kind of sketchy but it made me wonder if it could be done to add plug in capability to a Maverick hybrid.

Plug in in over night a start each day with a full battery charge.

Any opinions?

Does that Escape have a 12 V battery as well?

 

[dwinch53]

Not sure which post you are commenting on, OP talking about the HVB, or this most recent comment.
As noted in post before yours - that is also about the HVB.

No battery tender helping in either case.

Just use a Tender every now and then on the 12 volt battery

 

[Ranko Kohime]

Not sure what you mean.

I think it was in this thread, but I've noted before parking above 40% SoC, and overnight I'll wind up in forced recharge (around 33%) immediately upon restarting, vs. every single time I end up with a high state of charge (around 65%), it rises overnight rather than fall.

 

[Mavster Mechanic]

Battery level is all a guess.
Same in full EV's.

Only thing known with certainty is when a battery is full or empty.

Anything in the middle is a guess.
Always.

In EV's it's recommended to do a full charge at least once a month. You only get a real percent calibration after a full charge.

Being 20% off after a month of "partial charges" is pretty common.

The first generation of Ford Hybrid with NiMH battery cells (330v) would do a full charge to 100% every 10,000 miles.

Calibrates the meter AND balances the cells.

Not sure what the Maverick does.

 

[Escapologist]

Not related to temperature.

It is based on really high charge which usually happens only after a long episode of regen charging. Then you have to turn the truck off and back on. Then it only persists for several seconds. Easy to overlook.

But we do get double the EV power for a short time indicating they really don't want the battery to stay highly charged for very long.

IDK if I just wasn't looking for it before or didn't hit the right situation. Saw it yesterday, though situation was not something that had happened. Had to do a few errands, temps were few degrees below freezing, drives were short between stops, wind was enough to chill everything down again while I was at the stops for 15 mins. So it was running the IC for heat all the damn time, thus no bleeding down charge, and I was seeing big bar, but only for seconds as I set off and then it decided it needed heat again, gah.

I was hoping I put it to bed with a massive charge in and with temps just above freezing today, I'd get a bit of a drive out of it on a big bar, but nope. I muffed it. Had to go out and get something and turned accessory mode on, then didn't realise it didn't turn off when I fob locked it. Also seemed to go more than the 30mins ppl say it lasts because nearly an hour later when I got back in truck it was still on. Anyway, don't know if I wasted it all on accessory mode for long time.

 

[HeyBales]

IDK if I just wasn't looking for it before or didn't hit the right situation. Saw it yesterday, though situation was not something that had happened. Had to do a few errands, temps were few degrees below freezing, drives were short between stops, wind was enough to chill everything down again while I was at the stops for 15 mins. So it was running the IC for heat all the damn time, thus no bleeding down charge, and I was seeing big bar, but only for seconds as I set off and then it decided it needed heat again, gah.

I was hoping I put it to bed with a massive charge in and with temps just above freezing today, I'd get a bit of a drive out of it on a big bar, but nope. I muffed it. Had to go out and get something and turned accessory mode on, then didn't realise it didn't turn off when I fob locked it. Also seemed to go more than the 30mins ppl say it lasts because nearly an hour later when I got back in truck it was still on. Anyway, don't know if I wasted it all on accessory mode for long time.

That bar was for the HVB.

The screen in Accessory mode is the 12V battery.
You drained your 12VB for the time it was on, not the HVB.

Unless this was on your Lariat with push-button start - in which case there is no Acc mode, only Off, On, and Started. (see manual)
In which case it timed out from being On when fob left (should have), and merely brought up the last screen to be shown.

And it's up to 75 min on pre-25MY that systems may stay active, appears to be 60 min 25MY.

 

[Escapologist]

Well it calls it accessory mode if you button it with no pedal.

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