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What amp rate should I use to charge my NiMH batteries?
High performance battery chargers like the Traxxas EZ-Peak line with a minimum charge rate of 4 amps are recommended to completely charge high-capacity (3000 – 5000 mah) NiMH batteries in one cycle.
What rate should I charge NiMH?
Fastest Charging If a temperature monitor is used NiMH batteries can be charged at rates up to 1C (in other words 100% of the battery capacity in amp-hours for 1.5 hours).
What kind of charging is best for NiMH?
Fast charging: If the NiMH cells can be fast charged, then they are best charged in this mode. It is easier to detect the end of charge point when charged in this way. Up to around 70% charge the charging efficiency is close to 100% and the battery remains cool.
What’s the best charge rate for a NiMH battery?
Slow charging NiMH batteries: NiMH battery slow charging is not to be recommended. Using charge rates of between 0.1 and 0.25C do not provide the indicators needed to detect the end of charge.
How is a NiMH nickel metal hydride battery charged?
Unfortunately charging NiMH nickel metal hydride batteries is not as easy to achieve compared to other types of cell or battery. The NiMH cells, like NiCds require charging using a constant current. The rate of charge is normally specified on the case of the cell and this rate should not be exceeded.
How does thermal detection work on NiMH batteries?
Thermal detection: Detection of the end of charge of an NiMH cell by detecting the cell temperature also poses difficulties. While the cell will often feel warm when it is being overcharged, sometimes the temperature rise can be difficult to assess accurately as the centre of the cell will be much hotter than the exterior.
How is the charging efficiency of nickel based batteries?
It is interesting to note that the charging efficiency of nickel-based batteries of all forms is close to 100% up to about 70% of the full charge. This means that initially there is little temperature rise, but later as the charge level rises, the efficiency drops and heat is generated, raining the temperature of the cell.