Hybrid Battery

[Darnon]

Your drive battery under the vehicle is fine. Your 12V battery under the rear seat is not charging correctly. Have you had all the recalls done? The latest one reprograms the battery management to charge better, and if this is a 22 then there is an overlay battery cable installed to work around a poor connection inside the factory cable.

The BMS recall was more for the EcoBoosts. Underhood temps can damage the battery (especially early production with SLA vs AGM batteries), resulting in it dropping voltage during operation that the BMS may not detect and compensate for.

And the '22 battery cable typically presents as a totally dead vehicle, not necessarily degraded charging.

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[AVC]

Now, I wanted to talk about hybrid battery temperature.


Up to 102°F I infer the coolant pump is not pumping.

104°F to 111°F I infer the coolant pump is pumping to the battery radiator and return.

111°F and above I infer the coolant pump is getting help from the freon circuit OR the pump sped up to about double speed.

On the cool down, last few data points I was parked in my driveway with hood open. Right at 102°F internal battery temperature I could hear a circulation pump turn off.

I haven't found anywhere where Ford or a 3rd party confirms the exact lithium chemistry used for the Mav. You? From unofficial references to cell counts versus pack operating voltages, it *appears* to be 3.7v Li-ion, but maybe modified chemistry or construction to tolerate higher operating temps without significant cycle life penalties?

Don't suppose you also graphed SOC PID for these temps? Lower SOC's (under 60/70%) would also allow somewhat higher operating temps without significant cycle life penalties.

I assume there is also a pump PID, either in percent or current draw, or at minimum on/off ?

 

[Ozarkbeard]

Between 30-70% is ballpark normal for the HV battery. The system will not let it get outside these percentages, for best HV battery health and possibly 20 year lifetime.

Your "need to drive the truck" message is referring to the 12 battery.

As others suggested, get a NOCO battery maintainer and use it, if you get that 12v low battery message. It will prolong your 12v battery's lifetime.

 

[Stoutwall]

Your drive battery under the vehicle is fine. Your 12V battery under the rear seat is not charging correctly. Have you had all the recalls done? The latest one reprograms the battery management to charge better, and if this is a 22 then there is an overlay battery cable installed to work around a poor connection inside the factory cable.

I got all recalls done however I did not know about the overlay for battery cable. This is something I need to look into.

 

[Master Blaster]

I got all recalls done however I did not know about the overlay for battery cable. This is something I need to look into.

The CSP is 22B39
https://www.mavericktruckclub.com/f...mer-satisfaction-program-delivery-hold.32720/

 

[zweber21]

Now, I wanted to talk about hybrid battery temperature.

ON A RECENT DRIVE HOME I did something unusual for this ~53 MPG guy. I put it in Sport and pressed "L" at the same time. Jackrabbit starts. Maximum regen. City.
62°F day

HV battery Temp vs Battery Coolant Temp

°F. °F
94. 68
96. 68
99. 68
100. 68
102. 68
104. 75
106. 77
108. 77
111. 75
113. 72
115. 72
115. 72
115. 70
117. 70
115. 70
113. 70
111. 70
108. 72
104. 79
102. 79
102. 81
99. 79

Park. Cold soak 12 hours.
61. 61. Outside air 61

Morning drive. Normal Mode. No L.
61°F. 61°F start.
19 minutes. 10.7 miles. 3.9 miles EV
91°F. 64°F end.
Outside air 62

Up to 102°F I infer the coolant pump is not pumping.

104°F to 111°F I infer the coolant pump is pumping to the battery radiator and return.

111°F and above I infer the coolant pump is getting help from the freon circuit OR the pump sped up to about double speed.

On the cool down, last few data points I was parked in my driveway with hood open. Right at 102°F internal battery temperature I could hear a circulation pump turn off.

What is this mod you've done? Is there a guide you followed? This looks so cool.

 

[The Real Maverick]

What is this mod you've done? Is there a guide you followed? This looks so cool.

www.scangauge.com

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