MAINTENANCE
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
Fig. 2: Five-stage charging curve
Notice:
In different voltage systems, the current is constant, but voltage should vary. For example, in 48V system, the current should be
constant, but voltage should vary as follow: the first stage voltage should be 57.6V, the second and third stage voltage should be
59.3V, the fourth stage voltage should be 60V, and the fifth stage floating charge voltage should be 55.2V.
4.3 Discharge
When the load is operating, the battery is in the discharge stage and over- discharge is strictly prohibited.
To avoid battery over discharge, single-cell protection voltage is 1.75V, 6V battery is 5.25V, 8V battery is 7V, and 12V battery is
10.5V.
See Table 2 for the protection voltage under different voltage systems.
Table 2: Battery power-off protection voltage
Voltage System 2V/Cell 24V System 48VSystem
Power-off protection
voltage (V)
1.75V 21V 42V
Notice:
If the battery is used in the vehicle, do not frequently start the high current,
because high current discharge will lead to the positive plate active substances in the battery late in participate in chemical
reaction, and accelerate the contraction and expansion, and eventually lead to softening and fall off of the active substances,.
If large current is discharge frequently, it will aggravate softening and falling off of active material of the positive plate inside the
battery, and eventually lead to reduction of battery capacity and termination of its life.
Therefore, in daily use of the process, avoid discharge of large current. When starting the vehicle, the accelerator pedal shall be
slowly pressed until the vehicle runs at a constant speed.
It is suggested that the starting current should be less than 1.5C. Uniform running current should be less than 0.5C.
The connection wire should be selected according to continuous climbing current or maximum working current of the vehicle load.
If the wire diameter is too small, in use will overload heat, or even damage the battery or cause fire accidents.
5.Battery use Prevention
5.1Charging Prevention
The quality of battery charging performance plays an important role in battery life and service performance, which must be pay
attention to.
The electrical process is the reverse process of the electrochemical reaction of discharge. If the electrochemical reaction process
58 Owner’s Guid
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