Battery recharge basic knowledge

2023-01-30 14:45
(1) need to add electricity situation
The battery loaded in the car is recharged by the cars generator. The generator needs to output the current needed for driving and the current to keep the battery in a charged state. However, as shown in the following environment, the battery can not be fully charged even if the charger or the controller is normal, resulting in difficulty in starting the generator. At this moment, need to use other charger to replenish the battery.
Need to add electricity situation

※ Please pay attention to the following before adding electricity:
● Check the appearance of leakage, damage and other issues.
● Wipe the dust or dirt adhering to the battery with a damp cloth to remove the rust and dirt on the terminal parts.
● If the liquid level is low, please add pure water. During charging, the liquid level will rise, so when adding pure water, pay attention to the liquid level is not higher than the specified liquid level line.
(2) Charging method (normal charging and quick charging)
Charge method is divided into ordinary charge and fast charge 2 kinds.
● Normal charge
Definition: Charges for a long time using a current smaller than the battery capacity (about 1/10 of the capacity).
Purpose: The basic battery can be restored to full state of 00%.
Advantages: If you can ensure the correct current and charging time for charging, less damage to the battery.
Disadvantages: charging time-consuming.
● Fast charging
Definition: Use a large current with the same degree of battery capacity for a short period of time. Purpose: To restore the battery in case of emergency to ensure that the engine starts.
Advantages: a short time to complete the charge (up to 30 minutes)
Disadvantages: If the charging time is more than 30 minutes or the number of charging too much will damage the battery.
Charging conditions

(3) charging current, charging time standard
Charging current, charging time must be based on the battery capacity and discharge status adjustment.
Inadequate charging (current, time) not only causes the battery to run out of capacity faster, but also allows it to be used in a partially discharged state, resulting in deterioration of the plates and loss of life. In addition, too much charge (current, time) may also lead to deterioration of the plate, cell deformation and other battery failure.
Charge when charging current standard

Charging time standard (normal charging case)

(In case of quick charge)
Regardless of the size of the battery, the charging time must not exceed 30 minutes!
(4) Note when charging:
● If charging the battery directly after loading, you must first remove the negative terminal and then charge it.
● When removing the liquid port plug during charging, it may easily cause gas diffusion. Please be careful.
● When the battery level rises after charging, liquid overflow often occurs. Please note.
● As hydrogen and oxygen are generated during charging, it may cause fire, explosion and other hazards.
Therefore, do not approach the fire (smoke, matches, sparks, etc.) and ensure that no short circuit occurs.
● When charging, if the battery temperature exceeds 45 ℃, stop charging.
Note when charging:

※ Charging completed judgment (standard)
● The specific gravity of the electrolyte is between 1.250-1.290 and maintained at a fixed value for more than 1 hour.
● During charging, the voltage is between 2.5V-2.8V / single cell and remains at a constant value for more than 1 hour.
● All cells begin to generate a large amount of gas.
● The amount of charge (charging current X charging time) reaches 1.2-1.5 times the discharge capacity (Ah).
● VRLA (valve control) battery open circuit voltage (no load) in 12.8V above.