subject: The Advantages And Disadvantages Of Ni-mh Battery [print this page] Nickel metal hydride batteries and nickel-cadmium batteries are similar shape, and nickel-metal hydride batteries and nickel-cadmium battery cathode basically the same, are based on nickel hydroxide as the cathode, the main difference is that nickel-cadmium batteries is cadmium negative electrode active material used, but Ni-MH battery based energy storage alloy as negative electrode, the nickel-metal hydride batteries with more energy. At the same time in the electrochemical characteristics of Ni-MH battery with the nickel-cadmium batteries are also similar, so when using NiMH batteries can completely replace the nickel-cadmium batteries, the device without the need for any reform.
The main characteristics of Ni-MH battery:
1, Ni-MH battery energy density than nickel-cadmium batteries great times;
2, can reach 500 full charge and discharge;
3, with a special charger can fast charge in one hour;
4, self-discharge characteristics of a good than the nickel-cadmium batteries, charged to retain longer;
5, up to 3 times the continuous high-rate discharge; can be applied range: cameras, video cameras, mobile phones, cordless phones, walkie-talkies, laptop, PDA, a variety of portable devices and electric power tools.
Second, the advantages and disadvantages of Ni-MH battery
Advantages:
The discharge curve is very smooth to the consumption of electricity is about to complete, the voltage will suddenly drop. Ni-MH is a nickel hydroxide for the cathode to high hydrogen storage alloy as negative electrode, high-energy hydrogen storage alloy material makes nickel-hydrogen batteries have more energy. At the same time in the electrochemical characteristics of nickel-hydrogen batteries and nickel-cadmium batteries are also similar, so when using NiMH batteries can completely replace the nickel-cadmium batteries, the device without the need for any reform. Laptop battery
