Nickel-metal hydride batteries and lithium batteries differences
Nickel-metal hydride batteries and lithium batteries differences:
1, the weight, view of each battery voltage of a unit, the nickel-metal hydride and nickel-cadmium are both 1.2V, while the lithium battery is 3.6V, lithium battery voltage is 3 times as the other two. And the weight of the same type of battery, lithium batteries and nickel-cadmium batteries are almost equal, while Ni-Ni-MH battery is heavier. We can see that the battery itself, the weight of each one different, but the high-voltage lithium batteries because of 3.6V, in the case of the output voltage is equal to the number of combinations of a single cell can be reduced after the third and make the forming battery weight and size reduction.
2, the memory effect, nickel-metal hydride batteries and nickel-cadmium batteries both have the memory effect. Therefore, the regular discharge management is necessary. This regular discharge management are fuzzy state has been dealt with, or some even discharge under the incorrect knowledge conduct (each discharge or discharge use after a few times were a result of the company’s vary). This cumbersome discharge management can not be avoided in the use of nickel-metal hydride batteries. In terms of relative lithium batteries because of no memory effect, very convenient and simple in use. It is completely without regard to the residual voltage is how much, can be charged directly, charging time can be shortened nature.
3, self-discharge rate, nickel-cadmium batteries is 15 ~ 30% (months). Ni-MH battery is 25 ~ 35% (month), lithium battery is 2 ~ 5% (months). The nickel-metal hydride batteries self-discharge rate is the highest, while the lithium battery expertise discharge rate is very low compared to the other two types of battery.
4, charging, nickel-metal hydride batteries and lithium batteries can not be resistant to overcharge. Therefore, the nickel-metal hydride batteries for constant current charging PICK CUT control mode, when the charging voltage is the highest, to stop the charge is the best way of charging. The lithium batteries using constant current, constant voltage charging mode the best, if nickel-cadmium battery charger-DV controlled manner, then pairs of nickel-metal hydride rechargeable batteries and lithium batteries.
