Main features of Ni-Cd battery

Main features of Ni-Cd battery: charge characteristics, discharge characteristics, life cycle characteristics, storage characteristics and security characteristics
1.Charge characteristics
     Charge current, time temperature and other factors influence the charge characteristics of Ni-Cd battery. The charge voltage will rise when charge current increases and the charge temperature falls. Charge efficiency will change as the charge current, time and temperature change. In terms of quick charge, it is necessary to be equipped with the charge control system. Please refer to the following charging methods.

Typical Charge characteristics (The temperature influence the charge voltage)  

2.Discharge characteristics
    Discharge characteristics of Ni-Cd battery will change as the discharge current and temperature change. In general, compared with the primary batteries the Ni-Cd batteries have little change in the process of discharge. Although discharge current is very high, the damage of capacity is neglectable. The "P" series batteries in MIKE  is specially designed for meeting power tools which need high current discharge. In addition, our quick charge batteries with high capacity are specialized in R&D and production for satisfying the high capacity demand of high-tech installation.

Typical discharge characteristics (Different discharge current, different discharge curve)

3.Life cycle characteristics
      The life cycle of Ni-Cd battery is influenced on charge and discharge principles, temperature and methods. When charge and discharge according to IEC standard, the life cycle of charge and discharge will exceed 500. Different charge methods such as quick charge and charge in the operating will influence the real life cycle of batteries.

 Typical life cycle characteristics

4.storage characteristics
    When Ni-Cd batteries are stored under the condition of charge, the capacity will have losing (self-discharge) and the damage degree will increase when the temperature rises. Certainly the capacity losing will be recovered through charging. Although batteries are stored for so long time, the capacity will be recovered if the storage environment is appropriate.

5. Security
    If batteries used improperly, such as overcharge, short circuit and reversed charge led to higher internal pressure of the battery, a recoverable safety-vent valve will open in order to decrease the internal pressure so that prevent the battery from exploding.

The Specification of Ni-Cd

Four specs of McNair Ni-Cd battery:

(1).General type (Standard)
 Features
A.Long life cycle
exceed 500 charge and discharge cycles
B.Avoid maintenance
Simple operation like primary batteries but avoid overcharging and overdischarging (-20℃～+60℃)
C.Stable performance
low  can be applied to a large range of temperature
Applied examples A. Intercom, wireless phone
B. Measuring tools, calculator
C. remote control auto and other power toys
D.Photographic light, searchlight, lawn light
E. Appliances: power shaver, recorder

(2).High capacity type
Features
A.Long life cycle
exceed 500 charge and discharge life cycle
B.high current
To meet discharge in 5C(AAA、AA、A）、 discharge in  10C（SC、C、D）)
C.  To substitute 1.5V primary battery
Although its nominal voltage is 1.2V, this type of batteries can be completely applied to the equipment with 1.5V primary.
Applied examples A. Appliances: power shaver, recorder and so on
B.Earphone stereo system, CD player, radio

C. Measuring tools, calculator

(3)high temperature type
Features: A. Excellent charge and discharge performance at high temperature
Even at the 35 to 70 centigrade high temperature, this type of batteries have high charge efficiency of low current.
B.Long life cycle and excellent reliability
C. Well in bearing overcharge
 Applied examples:

A. Emergency light  B. Guiding light
(4) High power discharge type
Features: A. Excellent discharge performance with high current

Based on the rating capacity with 0.2C discharge,  discharge in 5C can reach 95% and  discharge 10C can reach 85%.
B. Quick charge performance
 charge in 1-2CmA current
C.Low Internal Resistance
D. Long life cycle and excellent reliability
Applied examples

A. power tools: electric drills, screwdriver and electric saw and so on
B. Power toys:  electric auto, electric plans
C. Video cassette recorder
D.Other equipment in high power discharge

Model List

Notes:
L: general batteries with low cap
H: general batteries with high cap
T: High temperature batteries
P: High power batteries