Hybrid Battery

[Stoutwall]

After driving for 2hrs @65mph with AC off. I parked the truck for 15mins. Did a EV battery test and the hybrid battery SOC was 39%. Plus after a day or 2 of not driving the app tells me I need to drive the vehicle to reconnect. I believe Ford needs to change my hybrid battery because why the state of charge is so low.

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[Sykotyk]

The hybrid battery is very small. It uses power even when driving with the engine on.

 

[MakinDoForNow]

After driving for 2hrs @65mph with AC off. I parked the truck for 15mins. Did a EV battery test and the hybrid battery SOC was 39%. Plus after a day or 2 of not driving the app tells me I need to drive the vehicle to reconnect. I believe Ford needs to change my hybrid battery because why the state of charge is so low.

The ice comes on to charge at 30% soc and stops charging at 40%soc. The Regen braking charges from 30% to 70or 72% soc and the electric drive will try to use the 30-70% stored electric as soon as possible to lower the time the ice is running. If you coasted downhill for a couple of miles before checking your HVB you should find it over the 40%. Your hybrid is working as designed.
Edit to add:
The "drive to reconnect" message is related to the doc of the 12v battery. Either drive quite a bit or better put a 4amp maintainer on the jump pins under the hood.

 

[The Real Maverick]

After driving for 2hrs @65mph with AC off. I parked the truck for 15mins. Did a EV battery test and the hybrid battery SOC was 39%. Plus after a day or 2 of not driving the app tells me I need to drive the vehicle to reconnect. I believe Ford needs to change my hybrid battery because why the state of charge is so low.

Your hybrid battery is normal.

40% is the nominal set point.
This level is really gentle on THIS TYPE of battery and will make the battery last 15 years or more.


This is different chemistry than a 12 volt flooded lead acid battery where 40% would be very bad.

These trucks do have some issues with low 12 volts batteries. But hey, they are relatively cheap and easy to replace.

 

[The Real Maverick]

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.

 

[NedF]

After driving for 2hrs @65mph with AC off. I parked the truck for 15mins. Did a EV battery test and the hybrid battery SOC was 39%. Plus after a day or 2 of not driving the app tells me I need to drive the vehicle to reconnect. I believe Ford needs to change my hybrid battery because why the state of charge is so low.

I think I am a little confused... 1st. if by EV battery/ hybrid battery you mean the High Voltage battery then this is normal as the battery will fluctuate between approx. 28% - 72% depending on many factors (ICE running, regen braking and electric motor use). Where the SOC is when you park it is a crap shoot.

The Ford app telling you that you need to drive more is solely on the 12v battery under the back seat. That is a whole different can of worms and I suggest you search out one or all of the threads on this subject.

 

[710-oil-614]

Agree with what others have said. Driving sustained 65mph for 2 hours would not increase the SoC.

 

[AutobahnSHO]

After driving for 2hrs @65mph with AC off. I parked the truck for 15mins. Did a EV battery test and the hybrid battery SOC was 39%. Plus after a day or 2 of not driving the app tells me I need to drive the vehicle to reconnect. I believe Ford needs to change my hybrid battery because why the state of charge is so low.

That's where it should be! The battery is meant to get charged up while braking, enough to "help" get you back up to speed and/or very slow driving. It's only a 1.1kWh battery- Teslas have 60+kWh

BTW Lithium Ion (Li-On) batteris in phones, laptops, smart watches, tablets- actually get "worn out" going over 80%. Fast charging also kills them.

 

[Stoutwall]

Ok, thanks everyone for input on this matter. Now I know not to worry about the EV battery SOC.

 

[The Real Maverick]

Take a look at post #5 updates.

 

[inline_five]

Take a look at post #5 updates.

What do you see on normal highway speeds? Is battery temp high (>100*) or does it stay relative stabile.

This is great info, I wish Ford would publish it in tech documentation somewhere. Also about how the A/C works.

 

[The Real Maverick]

What do you see on normal highway speeds? Is battery temp high (>100*) or does it stay relative stabile.

This is great info, I wish Ford would publish it in tech documentation somewhere. Also about how the A/C works.

Regen and boost during acceleration heats up the battery. City Stop n Go heats up the battery.

Highway in general does not.
Towing in general does not.

Driving around in "L" all the times heats it up. Maybe you'd want that in winter. Above 50°F I'd avoid it. Personally, I'd skip the "L" unless you are going downhill and really need it.

 

[Master Blaster]

... Plus after a day or 2 of not driving the app tells me I need to drive the vehicle to reconnect. I believe Ford needs to change my hybrid battery because why the state of charge is so low.

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.

 

[MakinDoForNow]

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.

Please repeat the battery vs coolant temps readings this winter starting near your annual low (20°F if possible).

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