1. Overcharging and Over-discharging: When using lithium-ion and polymer batteries for electric vehicles, it is crucial to avoid overcharging and over-discharging. After fully charging, allow for an additional hour of supplementary charging, but avoid overcharging and over-discharging. Overcharging and over-discharging can cause permanent damage to the positive and negative electrodes. Over-discharging causes the carbon layer structure of the negative electrode to collapse, preventing lithium ions from inserting during charging; overcharging causes excessive lithium ions to embed into the carbon structure of the negative electrode, resulting in some lithium ions never being released.
2. Charger: Use the specially designed charger.
3. Short circuit: Short circuits can easily occur during charging. These include internal and external short circuits, so extra caution should be taken.
4. Storage requirements: Polymer batteries: Store in an environment with a temperature of 25±5℃ and humidity not exceeding 50%;
Lithium-ion batteries: in an environment with a temperature of 20±5℃ and a humidity not exceeding 50%.
When storing or not using electric vehicle lithium-ion and polymer batteries for extended periods, they should be fully charged and placed in a dry, cool place. It should be noted that after a period of storage, the battery enters a dormant state, at which point its capacity is lower than normal, and its usage time is also shortened; this is normal.
What are the precautions for using lithium-ion batteries in electric vehicles?
When the battery is not in use for an extended period, disconnect it from the vehicle and periodically recharge it to prevent self-discharge or over-discharge by the protection board.
Lithium-ion battery charging facilities have safety features, but the grid load is lighter late at night, causing the voltage to rise and potentially exceed the charger's set automatic shut-off voltage, resulting in overcharging. It is recommended to use a timed charging switch during the night.
If the indicator light does not turn on after 10 hours of continuous charging, charging should be stopped immediately. Check if the temperature of the electric vehicle's lithium-ion battery is hot. If it is hot, it should be sent for repair as soon as possible. If it cannot be sent for repair immediately, the total charging time should be controlled to not exceed 8 hours, otherwise the battery will be damaged due to expansion and deformation.
Accelerate slowly to reduce the impact of high current on the battery, controller, and motor. Riders should take good care of the battery, use a tow wheel or pedal assist when going uphill, avoid frequent discharge, and start slowly without sudden acceleration. These measures will effectively extend the battery's lifespan.
It is strictly forbidden to drive electric vehicles with lithium-ion batteries that are completely depleted: Some users continue to charge their electric vehicles until they can no longer be driven, which seriously damages battery performance. Repeated deep discharges will greatly shorten battery life. If the battery is low on the road, it is best to pedal in advance to prevent deep discharge. Always charge the battery fully. Using the vehicle before it is fully charged will reduce the lifespan of the lithium-ion battery. Try to avoid charging at fast charging stations as much as possible.
What are the precautions for using polymer batteries?
Using polymer lithium-ion batteries until they are completely depleted is quite damaging; they should generally be recharged when the charge reaches 20%. Except for the initial activation, normal use only requires charging to 100% and then unplugging. Excessive heat or cold can also damage the battery, but temperatures between 0-35 degrees Celsius are not a major concern.
The charging current must not exceed the maximum charging current specified in the product specification. Using a current higher than the recommended value for charging may cause problems with the charging and discharging performance, mechanical performance, and safety performance of the battery cell, and may lead to overheating or leakage.
Polymer batteries are significantly damaged if completely drained during use; they should generally be recharged when the charge reaches 20%. Except for the initial activation, normal use only requires charging to 100% and then unplugging. Excessive heat or cold can also damage the battery, but temperatures between 0-35 degrees Celsius are not a major concern.
Before using polymer batteries, observe their appearance. If bulging is observed, further inspection is needed to determine if it is normal. Of course, some batteries have two aluminum sheets wrapped around the outside of the battery pack, so slight bulging may not be visible.
