Normal. At present, the self-discharge of batteries is generally relatively large. According to your calculation, the theoretical self-discharge will be completed in 60 days (in fact, the self-discharge is faster at full power, and the self-discharge duration is faster). the discharge speed will decrease when it reaches 60%-70%, so the time is not an accurate estimate).
In addition, it is difficult to determine the self-discharge using the voltage difference. After all, the overall stability is not sufficient and the discharge curves of different battery brands are different.
Due to self-discharge, the voltage gradually decreases when the voltage is lower than the minimum threshold voltage set by the lithium battery protection board (usually batteries lithium range from 2.5 V). at 3.0 V), the output power will be automatically cut off. Currently, a multimeter cannotmeasure the voltage outside the lithium battery and a cell phone or universal charger cannot be used to charge it. This is called battery hibernation.
Charge with a charger slightly higher than the normal charging voltage of the mobile phone, perform strong activation, repair and wake up the lithium battery which is dormant due to excessive self-discharge .
Lithium battery capacity discharge process of electric vehicle
1. The voltage across the lithium battery of the electric vehicle drops quickly in the initial phase. The higher the discharge rate, the faster the voltage drops. .
2. The lithium battery voltage of electric vehicles is entering a slow change phase. This period is called the battery plateau zone. The lower the discharge rate, the longer the plateau area lasts. more tensionn of the platform is high, and the voltage decline is slower. In the actual use of lithium-ion batteries, it is hoped that lithium batteries will work in the platform area as much as possible.
3. When the lithium battery is almost discharged, the lithium battery charging voltage begins to drop sharply until it reaches the discharge cut-off voltage. From the capacity test results, the curved relationship between discharge current and capacity can also be obtained.
The relationship between different discharge currents and capacities of lithium batteries for electric vehicles. The discharge current of lithium batteries will directly affect the actual capacity of the battery. The higher the discharge current, the lower the battery capacity, which shows that the higher the discharge current, the shorter the time to reach the final voltage. HASTherefore, when we talk about battery capacity, it is necessary to specify its discharge current (discharge rate).
Experience in charging and discharging lithium batteries for electric vehicles
Based on the editor's years of experience in using electric vehicles, here are the Most important tips for charging and discharging lithium batteries in electric vehicles. Vehicles during use Yes
1. Charge according to the standard time and procedure indicated in the electric vehicle lithium battery manual, even for the first times.
2. When the electric vehicle finds that the battery is too low, you should try to start charging the electric vehicle's lithium battery as soon as possible.
3. According to electric vehicle lithium battery wholesale market experts, activating lithium batteries does not require special methods.Lithium batteries will be activated naturally during normal electric vehicle use. If you insist that it will be fully charged for 12 hours when you first use it, that's actually not scientific.