low temperature LifePo4 too good to be true?

[MartyGras]

It’s just too good to be true they clean their batteries can be used down to -20° C

100AH Low Temperature RV Boat Lithium Ion Bluetooth Battery | LiFeBlue Battery

LiFeBlue 100AH Battery The Smartest Bluetooth Lithium Ion Battery for RV and Marine Use!

www.lifebluebattery.com

 

[Forbisher]

It’s just too good to be true they clean their batteries can be used down to -20°

Their battery has a built in heating system so why do you doubt their claim?

Low Temperature Version - Built in heating system
Automatic safe charging and use of your battery down to -20°C!

 

[MartyGras]

Perhaps because as an example every time Will tests something with a low temperature disconnect it fails... I’m not saying that this isn’t exactly what it says but history shows when it comes to LifePo4 batteries that claims and reality can be two very different things

 

[Forbisher]

Perhaps because as an example every time Will tests something with a low temperature disconnect it fails... I’m not saying that this isn’t exactly what it says but history shows when it comes to LifePo4 batteries that claims and reality can be two very different things

The low temperature disconnect worked on Wills battery video tests for:
Battle Born 100A
Lion Energy 1200 UT
Renogy "Smart" 100Ah LiFePO4 and maybe others.

So while others like Expert Power and Ruixu failed more drop in type batteries have passed.

Besides the LifeBlue built in heating system will ensure that their batteries keep
charging even when the temp goes below the low temperature disconnect cut off
so their claim of automatic safe charging and use of your battery down to -20°C really
has nothing to do with the usual cut off temp.

Battle Born is coming out with built in heating and other features.

 

[Forbisher]

https://www.lifebluebattery.com/ewExternalFiles/Low%20Temperature.pdf

Irreversible damage can happen to any Li-ion battery that is charged when frozen.
LiFeBlue PCLT and HCLT model batteries have an internal heater and controller that is managed by the BMS.

How It Works
When you begin to charge the battery and the cell temperature is below 26°F, charge current is diverted to the heater and cell charging is inhibited. The Event page will display "Low-Temp when charging”.
After the cells reach a safe temperature to begin charging, current is redirected to the cells.
No current for the heater is taken from the battery during Standby or Discharge modes.
Each battery in parallel requires a minimum amount of power for the heaters.
The heater will attempt to power on but if current is too low, the BMS will start a 5 minute delay and then retry.

This will continue until the following power levels are available to each battery:
12V100Ah: 78W (about 6A)
12V150Ah: 96W (about 8A)
12V200Ah: 128W (about 10A)
12V300Ah: 192W (about 15A)

Standard Batteries
All other LiFeBlue Battery models have freeze protection built in. If the cells are below 26°F, charge current will be inhibited until the cell temperature is safe to recharge.