Batteries.... ?

[BLK HMMWV]

Will a LiFePO4 battery with the following description work for the battery in an Hmmwv:

(It is listed as 24V 300Ah LiFePO4 Battery Built-in BMS Lithium Iron Phosphate Cells.)

Product details:
Delivery date: 2023
Battery type: 3.2V Lifepo4 battery
Fixed amount: 300AH
Nominal voltage: 25.6V
Maximum charging current: 50a
Instantaneous discharge current: 200a
Continuous discharge current: 100A
Life: 6000 cycles or more
Size: 535*215*207mm (+/-10mm)
Charge temperature: 0 to 45 ° C
Discharge temperature: -20 to 60 ° C
Storage temperature: -20 to 65 ° C
Operating voltage range: 20V to 29.2V
Electrical voltage: 29.2V
Overload protection voltage: 29.2V / 0.05 V
Protective voltage for overload: 20V / 0.05 V
Protect the battery temperature: 60 ° C Plusmn 5 ° C
Output and Parameters: High Current Positive / Negative Connection column (red positive, black).

Short answer NO

 

[Coug]

Will a LiFePO4 battery with the following description work for the battery in an Hmmwv:

(It is listed as 24V 300Ah LiFePO4 Battery Built-in BMS Lithium Iron Phosphate Cells.)

Product details:
Delivery date: 2023
Battery type: 3.2V Lifepo4 battery
Fixed amount: 300AH
Nominal voltage: 25.6V
Maximum charging current: 50a
Instantaneous discharge current: 200a
Continuous discharge current: 100A
Life: 6000 cycles or more
Size: 535*215*207mm (+/-10mm)
Charge temperature: 0 to 45 ° C
Discharge temperature: -20 to 60 ° C
Storage temperature: -20 to 65 ° C
Operating voltage range: 20V to 29.2V
Electrical voltage: 29.2V
Overload protection voltage: 29.2V / 0.05 V
Protective voltage for overload: 20V / 0.05 V
Protect the battery temperature: 60 ° C Plusmn 5 ° C
Output and Parameters: High Current Positive / Negative Connection column (red positive, black).

Slightly longer answer, the specs above list it as max charging of 50a, and even the oldest HMMWV has at least a 60 amp alternator, and newer ones can have up to 400 amps.
The starter is also going to draw more than 200a.

That battery appears to be a deep cycle version, not a starting battery, so it isn't designed for heavy loads like a starter, but rather a smaller, longer discharge. Trying to use it in a starting application may result in fire or explosion.

Plus for the price you could easily buy multiple 6TAGM batteries and a top of the line charger for them.


Some info from the BatteriesPlus website:

Starting
When you hop in the car and turn the key, the starting battery needs to release a very large amount of current to get the starter motor spinning to crank the engine. This extremely large amount of current, even if it only lasts for a second or two, will activate the battery management system (BMS) in the lithium iron phosphate battery, rendering the battery useless requiring a replacement battery to be installed.

https://www.batteriesplus.com/blog/power/lithium-starting

 

[Mogman]

Welcome to the SS forum!!

 

[Mullaney]

Will a LiFePO4 battery with the following description work for the battery in an Hmmwv:

(It is listed as 24V 300Ah LiFePO4 Battery Built-in BMS Lithium Iron Phosphate Cells.)

Product details:
Delivery date: 2023
Battery type: 3.2V Lifepo4 battery
Fixed amount: 300AH
Nominal voltage: 25.6V
Maximum charging current: 50a
Instantaneous discharge current: 200a
Continuous discharge current: 100A
Life: 6000 cycles or more
Size: 535*215*207mm (+/-10mm)
Charge temperature: 0 to 45 ° C
Discharge temperature: -20 to 60 ° C
Storage temperature: -20 to 65 ° C
Operating voltage range: 20V to 29.2V
Electrical voltage: 29.2V
Overload protection voltage: 29.2V / 0.05 V
Protective voltage for overload: 20V / 0.05 V
Protect the battery temperature: 60 ° C Plusmn 5 ° C
Output and Parameters: High Current Positive / Negative Connection column (red positive, black).

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Welcome to the Outfit!

Don't take it personal when everybody answers up with a NO to your question. That is what this place is all about. Ask a question, Get an answer. Sometimes it isn't as "cut and dried" as this one - but we all enjoy being able to help and steer folks in the right direction.

Welcome to the group and post us up a few pictures...

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[Eddy1947]

Thank you all for your quick answers. I am not put off by a quick "no" as that is exactly what I needed to hear. The answer with all of the details that followed will help me make a wise choice going forward. Again, thank you all.