What is the Maximum Discharge Rate of Ni-MH Batteries?

What is the Maximum Discharge Rate of Ni-MH Batteries?

Nickel metal hydride (Ni-MH) batteries are generally not suitable for high-rate charging and discharging, but they are widely used in model toys and electric tools and are safer to use than lithium batteries. The NiMh battery can usually discharge with a maximum 3C rate, but Grepow’s NiMh batteries can achieve the rate of a maximum of 15C.

What are NiMh batteries?

The Nickel metal hydride (Ni-MH) battery is an improvement from nickel-cadmium (NiCd) batteries as it replaces cadmium with a metal that can absorb hydrogen. NiMH batteries can provide higher capacity, have less obvious memory effect, and be more environmentally friendly.

Features

Nominal Voltage: 1.2V

Fully Charged Voltage: 1.4 to 1.45V

Cut-off Voltage: 0.9 to 1.0V

Energy Density / Weight: 60 to 120 Wh/kg

Energy Density / Volume: 140 to 300 Wh/L (504 to 1188kJ/kg)

Power / Weight: 250 to 1000 W/kg

Self-discharge rate: 20% in the first month, continuous decrease by month, 10 to 30% per year for low self-discharge models (depends on temperature)

The life cycles of charge and discharge cycles: above 500 cycles

Maximum 15C discharge rate NiMh batteries

In general, there are three types of discharge rate of NiMh batteries:

LP (Low Power): Medium discharge rate: normally 5C discharge rate

HP (High Power): High discharge rate: normally 10C discharge rate

UP (Ultra Power): Normally 10C or 30A discharge rate, up to maximum 15C rate discharge

High-discharge rate NiMh batteries can be used in applications that require higher power, such as radio control cars, toys, power tools (e.g. electric drill, saws, angle grinders, etc.), and some medical devices.

If you are interested in Grepow’s high-discharge rate NiMh batteries, please feel free to contact us via email: info@grepow.com

Learn more about batteries

Keep an eye out for Grepow’s official blog, where we regularly update industry-related articles to keep you up-to-date.

Grepow website: https://www.grepow.com/

Grepow Blog: https://www.grepow.com/blog/

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