What is a Nickel-metal hydride battery and its basic functions?

What is a Nickel-metal hydride battery and its basic functions? />


Similar to lead-acid batteries, a nickel-metal hydride battery is another important type of battery that consumers need to know about. As a battery business, we wish to ensure that our customers have clarity with regards to the options available in the market so we will unpack the key details regarding nickel-metal hydride batteries.

What is a nickel-metal hydride battery?

They are viewed as replacements to the nickel-cadmium batteries where cadmium was replaced by metal hydride as the anode or the negative electrode. The remaining components of the battery include nickel-hydroxide the cathode and alkaline potassium hydroxide as the electrolyte. The nickel-metal hydride battery also makes use of the electrolysis process during charging and discharging.

Research on nickel-metal hydride batteries started for a different purpose in the 1970s. At that time hydrogen was being considered as an alternate source of energy and the nickel-metal hydride cell we know today was touted as a possible means to store hydrogen. In recent years, the nickel-metal hydride battery has become a part of the discussion along with lead-acid batteries and nickel-cadmium batteries due to their comparatively environment-friendly nature.

Nickel – metal hydride also faces stiff competition from lithium-ion batteries. In fact, in most consumer electronics, lithium-ion has almost completely replaced nickel-metal hydride batteries.

In hybrid electric vehicles, the Lithium Ion battery has a track record of providing maintenance-free service for nearly 10 years.

Moreover, with recent refinements, Lithium Ion batteries have eliminated issues such as memory effect and high self-discharge rates. In general, nickel-metal hydride batteries have quite a few features that make them useful. Their average life is reasonably long and can last around 3000 cycles. They have the capability to be deep cycled so there is a possibility to use them in conjunction with solar panels and UPSs.

It's an ever-changing industry that we are involved in. At BatteryPower Zone we aim to answer all your vehicle battery-related problems.