Lithium battery is a kind of rechargeable battery. It has characteristics like high energy density, high current charge and discharge, no memory effect and low cost of raw materials.
What’s more, it is environment-friendly. So it is highly favored ever since it is produced. Since it came out in the 1990s, it has been used in electronic products like button batteries, mobile phones and DC digital products. It is also used in electric bicycles. But the cost of lithium-ion battery accounts for one-third to one-half of the cost of electric vehicles, which is far greater than the proportion of lead-acid battery in the whole vehicles. Moreover, due to the high specific energy and poor material stability, lithium batteries are prone to safety problems. With the development of technology, mature lithium-ion batteries will become the choice of high-quality electric vehicles.
The working principle of lithium-ion battery is: when the battery is charged, the Li-ion lithium in the positive material comes out and goes through the diaphragm into the negative graphite; when the battery is discharged, the li-ion comes out from the negative graphite and goes back to the positive material. With the progress of charge and discharge, Li-ions are constantly embedded and separated from the positive and negative electrodes.
Proper use of battery.
When the batteries are used in series, the internal resistance of each battery cell should be the same. Or the terminal voltage of the batteries varies when charging and discharging. which will eventually lead to the failure of the whole set of batteries because of lower charging. Therefore, the balance consistency of the battery pack has a considerable impact on the life of the electric bicycle battery. For consumers, how to use it also has a certain impact on the life of a new battery. According to our years of researches and use of batteries, here are some tips for you:
Cycling Speed: 20-25km/h
Riding distance: 10-30km /day, discharge depth less than or equal to 70% (full charge and discharge once every 2 months)
Charging frequency:once a day
Carrying capacity: single rider (or carry one child under 10 years old )
According to the above principles, an electric bicycle with good quality can be used normally to 3-4 years, or even 5 years. And the battery can be used for about 1.5 years. The smaller the discharge depth of the battery, the longer the cycle life of the battery and the longer the service life of the battery. Therefore, what consumers generally think that charging once is a cycle is wrong. In order to prolong the battery life, they must always keep the battery in a fully charged state. In a long time of power loss, the negative plate of the battery will salinized easily, resulting in the loss of battery capacity, then affecting the service life of the battery.
The service life and performance of qualified battery for electric bicycle depend on the use and maintenance of consumers to some extent.
Charger matches battery
The battery used for electric bicycle is damaged by charging, not by using. So it is important of matching charger and battery. There are two cases: one is that the new charger does not match the parameters provided by battery manufacturer; the other is that the quality of the charger components is poor. At the beginning, it is still matched. As time goes on, the components are aging as the temperature continue rises , resulting to unstable charging voltage and conversion current, then the battery is damaged.
Charge regularly and in time
Some consumers usually have a misunderstanding about the nominal cycle life in the user’s manual. They think that once the battery is charged, the life of the battery will be reduced once.They won’t charge until it reaches the controller protection voltage of 31.5V. However, it can’t protect the battery, but shorten its life. So please remember to charge the battery timely if possible.
It is forbidden to continue riding when the indicator light shows out of power. You should not continue riding even if it can go after taking a short rest. It does great harm to the battery.
It’s better to use our feet or pedal assist when electric vehicles are just starting, climbing or overloading.
Try to avoid the switch and connector getting wet in rainy days to prevent electric leakage