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US 10,328,807 B2Granted
Method for operating a battery charger, and a battery charger
AssigneeCTEK Sweden AB
InventorsPer Eriksson, Linus Eriksson, Hans-Olof Frojd
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Abstract
The present invention relates to a method for operating a battery charger, and a battery charger. The method comprising the steps of determining a capacity of the battery, determining an initial charging current, apply the calculated initial charging current as a charging current to the battery, determining the voltage change with time ΔV/Δt for the voltage over the battery, adjusting the charging current based on the ΔV/Δt.
Claims20
A method for operating a battery charger configured to be connected to a battery, comprising the steps of:
- connecting the battery to the battery charger;
- determining a capacity (C) of the battery, wherein the step of determining the capacity (C) of the battery comprises applying an electrical pulse to the connected battery, calculating a conductivity (G) of the battery using a voltage difference (ΔV12) between a first voltage (V1) and a second voltage (V2) measured during and after said pulse and calculating the capacity (C) using a capacity function that determines the capacity (C) of the battery for the given conductivity (G);
- determining an initial charging current using the capacity (C) of the battery;
- applying the determined initial charging current as a charging current to the battery;
- determining the voltage change with time ΔV/Δt over the battery;
- adjusting the charging current based on the voltage change with time ΔV/Δt to obtain a predetermined rate of change of the output voltage ΔV/Δt.
3 more elements
Dependencies are inferred from the claim text.