Charging lithium ion cells is quite simple and requires a charger that can handle constant current (CC) during the initial stage and constant voltage (CV) during the final stage of the charging cycle.
During charging, the maximum charge current must not normally exceed 0.5C (which corresponds to the current needed to discharge a fully charged battery in two hours).
Charging beyond 0.5C is possible, but cooling of the battery is required. Examples of this is the so-called super charging used by TESLA for their electric cars, but this is obviously beyond the scope for e-bikes and e-trikes.
Når man begynder at oplade, vil opladeren være i CC-tilstand, og når spændingen når 4,2 volt for cellen, skifter opladeren til CV-tilstand, og CV-tilstanden holdes, mens strømmen reduceres, indtil den når 0,1C, og hvilken punkt cellen er fuldt opladet (se graf nedenfor)
As can be seen, the standard charger of 8A that we provide is a safe choice for all batteries. For all but the smallest battery the 18A is also a good choice.
For maximum charging speed we provide a charger of 27A, which is well suited for the 3 largest batteries.