Main Characteristics of Ni-Cd Batteries
|
1. Charge Characteristics
The charging characteristics of Ni-Cd are quite affected by the charging current, ambient temperature, charging time and other factors. Normally, in the same ambient temperature, the higher of the charge current , the higher the charge voltage will be. On the other hand, the lower of the ambient temperature, the higher of the charge voltage in the condition of same charging current.
|
|
2. Discharge Characteristics
The discharge characteristics will also vary upon the discharge current , temperature, and other elements.
|
|
Note: Discharge end voltage: in some application that need batteries high rate discharge (for example, 10C), the end discharge voltage is recommended as
below: |
| For cell and battery pack within 6 : (number of batteries x 1.0) V |
For battery pack including 7 to 20: ((number of batteries ? ) x 1.2 )V
|
3. Cycle Life Characteristics:
Cycle life is the number of the charge and discharge that a battery can achieve before the battery capacity drops to 60% of its nominal capacity, and it will be wellaffected by the charge and discharge conditions, the ambient temperature and andothers. Normally the batteries can reach 500-1000 cycles with apply with the IEC charge and discharge specification, but the actual cycle life will vary according to the batteries actually used in a different condition. |
|
4. Storage Characteristics:
The batteries will gradually lose its capacity during storage in a charged state even without loading. And this tendency become greater if in an higher temperature location , but after several charge and discharge cycles, the nominal capacity can be restored. |
|
|
5. Safety:
The battery safe vent will function to release the pressure to prevent the battery from bursting when the battery are improper used like overcharged, reverse charged or short-circuit
|
|
