Float voltage is the voltage at which the battery is maintained after it is fully charged to maintain the capacity by compensating for the battery's own discharge. Voltage can be maintained constant for the entire duration of cell operation (as in automotive batteries) or it can be held for a certain phase charging by the charger. Proper float voltages vary significantly with chemical and battery construction, and ambient temperature.
With voltages suitable for battery types and with appropriate temperature compensation, the floating charger can stay connected indefinitely without damaging the battery.
However, it is important to understand that the floating voltage concept does not apply at all to some battery chemists. For example, lithium ion cells can not safely drip the load at any voltage, because the chemical system inside the cell will be damaged to some extent by doing so. Some lithium ion variants are less tolerant than others, but generally overheat possibilities and fire and explosion are not uncommon. This is important to ensure that the battery cells involved can safely drip charged, and that the charger circuit that automatically enters the trickle filling mode is safe and appropriate in each case.
Video Float voltage
Lead-acid batteries
Accepted the average floating voltage for lead-acid batteries at 25 Â ° C can be found in the following table:
- Temperature compensation
Compensation per cell about -3.9 mV/Â ° C (-2.17 mV/Â ° F) of temperature rise is required.
- Contoh 1
Battery 12 V (6-cell) at 30 Â ° C (86 Â ° F) (5 Â ° C change):
(- 3.9 mV/Ã, Â ° C) ÃÆ'â € "( 6 cells) ÃÆ'â € "(5 Â ° C changed) = -117 mV
13.4 V (float battery) (-117 mV) = 13.28 V
- Example 2
Battery 12 V (6-cell) at 20 Â ° C (68 Â ° F) (-5 Â ° C change):
(- 3.9 mV/Ã, Â ° C) ÃÆ'â € " (6 cells) ÃÆ'â € "(-5 Â ° C change) = 117 mV
(13.4 V floating battery) (117 mV) = 13,52 V
Not compensating for the temperature will shorten the battery life with the advantages or disadvantages of charging.
Maps Float voltage
See also
- Trick charging
References
Source of the article : Wikipedia
0 Comments