In the Electric Car industry, the development of battery technology is the core issue, so the series balance of battery packs is a difficult problem. Battery packs in the same batch may not be in the same state. There are many reasons for this, such as There are no strict controls or raw material usage issues in production.
First, the battery should be charged normally, and then discharged with current at a rate of 2 hours. When discharging, test the flowing voltage of the battery, screen out some with lagging capacity, add 1.0 sparse acid until the current level is just enough to see the electrolyte appear, and continue charging for more than 10 hours. When charging, the temperature should not be too high. After charging, leave it for 0.5-4 hours and repeat the 2-hour rate discharge. If the test voltage value still does not reach the single cell voltage of 1.6V, you need to repeat the above operation method until it meets the standard. If the battery capacity is still around 0V and low voltage after repeated charging or discharging, the battery may have a short circuit, serious loss of active material, severe irreversible sulfation, etc. It cannot be repaired and can basically be scrapped.
Before driving the Electric Car every day, check whether the battery is sufficient, whether the brake performance is good, whether the screws are loose, etc. If there are any faults, they should be repaired and eliminated in time. Only when the inspection is completed and there are no faults can the Electric Car be driven out. When repairing the charging part or replacing the charging fuse, you must first Unplug the 220V power plug and do not work with power on; you must turn off the power switch every time you park, pull out the key, move the gear switch to the neutral position