A, Nickel cadmium battery (Nickel – Cadmiun Batteries)
1 nickel cadmium battery can repeat 500 times more charge-discharge, very economy.
2 for small and large internal discharge, and when it changes when discharging voltage, small as dc power is a kind of excellent quality of the battery,
3 because of the sealed, it will not have electrolyte leakage phenomenon, also don’t need to supplement electrolyte,
4 and other types of cells, in contrast, nickel cadmium battery charging resistance or pass electricity, easy to operate,
5 long placed next to performance degradation, when electricity is filled out when the original properties,
6. Can be used in a wide range of temperature range,
7 just because it USES metal containers, and have strong mechanical,
8. Nickel cadmium battery in very strict quality management is manufactured, have very good quality of rice.
Second, nickel cadmium battery discharge properties
1. According to the discharge current discharging voltage difference in how some 1.2 V is around,
2. Ah, the capacity of the battery in mAh units,
3 when the discharge end to discharge the limit when called “discharge termination voltage,” nickel cadmium battery discharge termination voltage 1.0 V/cell,
4 use temperature range – 20 ° ~ 60 degrees, in this range can undertake discharging.
Third, preservation of attention
1 in – 30 degrees c ~ 50 degrees Celsius temperature range, but if it is kept in a long time, please put the case in 35 degrees below preservation,
2 for charging status or discharge of preservation is possible, but compared to discharge capacity can be easily earlier reply and activated,
3 when the battery in long placed before use, must be completely charge before use.
Four, nickel cadmium battery memory effects (effect) with memory
When the nickel cadmium battery repeat after several times of low capacity after, if must do a relatively large discharge battery will not when, this kind of situation we called “memory effects”. Memory effects may be nickel cadmium battery in the most easily misunderstood. High voltage is set to terminate discharge the VCR, with the lower voltage is used, on the surface, but seems as low voltage discharge is 1 ~ 2 times by the discharge completely and solve this phenomenon. Suggestions after ten times a discharge battery, in order to prevent the suggestion.
Lithium batteries,
A, Lithium Ion Lithium Battery (a) features:
1. With high density and high capacity than nickel cadmium battery energy for its volume, weight energy density of 1.5 times for 2 times,
2 high voltage, the average voltage is 3.6 V, nickel cadmium battery nimh batteries, three times (nickel cadmium, nimh batteries voltage of 1.2 V),
3 the use of voltage and high capacity; plain,
4 the load characteristics, can discharge 2C,
5 the extensive use of the temperature – 200c.best ~ 60 ° c
6 good life, through the charging and discharging after discharge capacity of 500 times at least 70%.
Ni-mh battery and lithium battery difference:
A weight
With each unit cell voltage, and nickel cadmium nimh is 1.2 V, and lithium battery is 3.6 V, lithium battery voltage is the other two 3 times. And the same type of lithium batteries battery weight with nickel cadmium battery almost equal, and nickel nimh batteries are heavier. That every cell itself, but the lithium battery weight by 3.6 V output voltage, high voltage under the condition of the same number of individual cells that gives can reduce one-third and make after battery weight and volume decreases.
Second, the memory effects
With ni-cd battery are the same memory effects. Therefore, the regular discharge management is also required. This regular discharge by fuzzy condition belongs to, even some incorrect knowledge under each discharge or use discharge (several times after discharge for company’s varies) this complicated discharge management in use when nimh batteries is inevitable. Relative of lithium battery for no memory effect, because of the very convenient in use. It is not how much heed residual voltage directly, can undertake rechargeable battery can shorten the time nature.
Third, self-discharge rate
Nickel cadmium battery for 15-30% (month). Ni-mh battery for 25 ~ 35% (month), lithium battery for 2 ~ 5 (month). Above the nimh batteries, and is the largest self-discharge lithium batteries with other two kinds of special than batteries discharge rate is extremely low.
Four, charging ways
Ni-mh battery and lithium battery charging can resistance. Therefore, the current nimh batteries to PICK the battery recharging voltage control way in how to reach the highest, stop charging for best charging ways. But while using lithium battery voltage, current, the best way to recharge, if the nickel cadmium battery charger – DV control for ni-mh battery charging words and lithium batteries.