Generally, a DC power supply is used to connect low-voltage batteries in series, or a load meter is used to connect high-voltage batteries in series to lower the voltage in order to 'achieve battery voltage balance. .
If the voltage difference is tens of millivolts, charging or discharging is not easy to operate. Someone has to watch her, otherwise she will easily charge more or less. Obviously, this method of maintenance. is very annoying; the efficiency is also low. You cannot repair several sets of lithium batteries in one day.
Precautions for using 48V lithium batteries
The lifespan of electric vehicle batteries is very long. Lithium iron phosphate batteries should be charged and discharged frequently and should not be stored for long periods of time. . When you drive un electric vehicle, you should get into the habit of recharging it after 80% of the battery is used. Regardless of the distance traveled, it is best to recharge the battery and not wait until it is exhausted to recharge it.
When charging the electric vehicle battery in the vehicle, the electric door lock must be closed. Do not charge the battery backwards. Try to fully charge it at the same time when the electric vehicle battery is not in use. for a long time, it should be charged once a month. Store the battery once it is fully charged. Do not store it in an exhausted state.
How to repair the electric vehicle lithium battery protection board that cannot be charged and discharged?
Lithium battery maintenance technology is to repair lithium batteries.
Repair itBattery repair refers to the general term for the repair of secondary rechargeable batteries whose performance has been degraded or failed by physical or chemical means. Repair can restore battery capacity, extend battery life, and improve performance. There are many methods to repair lead-acid batteries, including "water therapy", "shallow cycle high current charging method", "nano carbon ground battery activator repair ”, “pulse battery repair instrument repair”, “battery repair fluid repair”, etc.
Note
Low temperature can change the electrolyte inside the lithium battery and promote chemical reactions in the newly-used battery. 'be frozen. When a lithium battery is placed in a low temperature environment, the microstructure of the lithium battery filmlithium and the electrolyte on the surface of the lithium battery, as well as their interface, will undergo significant changes, resulting in temporary inactivity inside the battery and a reduction in leakage current. Therefore, after recharging again, the waiting time will increase.
First of all, we need to analyze why it is not loading. \x0d\ Reasons: 1) The battery is unbalanced ---------a battery or multiple batteries have reached the overload protection voltage of the protection board. \x0d\2) The mos in the charging direction of the protection board is broken. \x0d\3) The integrated protection circuit is broken. \x0d\4) The device between the IC mos command is broken. \x0d\5) The NTC resistance of the protection board is broken or the resistance value is incorrect --- which makes the IC think that the battery is in a high temperature state - charging is prohibited. \x0d\The problems aboves may prevent the battery from charging. It is easy to fix the above problems if you can detect them. . . . \x0d\Basically, these problems need to be handled by professionals, otherwise it will easily cause the battery to short circuit and burn the protection board or burn out. The battery core may even cause fire, etc. . . . .