Temperature charging protection LiFePo4

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strike asked Dec 25, '22

Temperature charging protection LiFePo4

Could anyone explain how the temperature charge protection of a LiFePo4 battery works? Despite the fact that the BMS says that charging has been disabled due to low temperature, the battery is charged. See both pictures.

(For examination purposes I set the minumum temperature on a save level of 8 degrees and checked wether the battery would be charged or not, and it actually did.)

Does “disabled” mean that the charge current is brought to a save level and will be brought back completely for temperatures below zero degrees?

Thanks in advance!

battery charging temperature

6b7ac76d-629b-497e-9ce0-ca277f3140ac.png (88.9 KiB)

92f456d1-570e-4a0e-a7fb-d3166c0eb596.png (84.9 KiB)

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Answer 1 · 2022-12-25T13:04:12Z

Matthias Lange - DE answered · Dec 25, 2022 at 01:04 PM

Where is the charging current coming from? Maybe the charging source is not controlled by the BMS? What components do you have in your system?

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Answer 2 · 2022-12-25T13:15:38Z

strike answered · Dec 25, 2022 at 01:15 PM

The charging current comes from a Victron charger. The charger doesn’t have bluetooth. So it is not part of the V.E. Network

But the solar panels charge the battery as well, despite the fact that the MPPT is part of the V.E. Network with temperature protection. (But that was only a low current, in any case due to a lack of sunshine.)

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