How to keep the eBike battery
DMove eBike School: how to keep the eBike battery
Because of the cold or too many commitments, it may happen that an eBike remains stationary for a long time. Here’s how to properly store the battery
After dealing with electric motors and Kashima treatment for forks and other components, the focus of our eBike phonebook goes to a fundamental component: the battery. As in all electric vehicles, including cars, motorcycles and scooters, a certain care of the accumulator is necessary to avoid subjecting the cells to unexpected stresses, and thus shortening their performance and useful life.
Let’s start by understanding what the potential risk factors for a battery are. First of all is the use itself, since the lithium cells are certified for a certain amount of cycles, after which they naturally start to degrade. During this period, the degradation will be less when more high-power charges and discharges will be avoided. This means that recharging the battery at low powers (when times allow it) is an optimal practice, as well as avoiding brutal energy supplies.
Another very important factor is the recharging state, often abbreviated as SOC (State of Charge), especially what the battery should have when it was disconnected from the bike. This practice should be taken into consideration especially when you think to leave the eBike steady for a long time: leaving the battery connected may expose it to damaging environmental conditions, such as cold and humidity. The degradation of the battery is accentuated when the state of charge is near its extremes, ie 0% and 100%. So before placing the battery in an appropriate place it is good to make sure that the charge is in an intermediate value: ideally 80% is the state that ensures a longer storage without damage.
In case you have often taken your battery to extreme values, do not worry too much. It is good practice for manufacturers to program a certain margin through the Battery Manage System (BMS). This means that when the battery shows, for example, the state of charge of 0%, it is actually not completely empty, but it is at zero level only for the part that the manufacturer has made usable. In truth, a small part is not affected and is not visible to the user except through special software.
The last precaution concerns the temperatures at which the battery can be exposed. As well as charging extremes, even extreme temperatures are harmful to the chemistry of lithium cells. Conditions below 0 ° Celsius or above 40 ° are to be avoided, even if still not devastating. Much worse if the temperatures were much below zero or above 60 °. It goes without saying that therefore an unused battery should be stored in places with mild and possibly dry temperatures. In any case, to avoid oxidation on the electrical contacts, it is advisable to protect them with a light coat of contact grease.
By following all these indications your battery will surely have a long life and will ensure good performance for many hours of rides.
Source: Il quotidiano della mobilità smart (Dmove.it)