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Basic terms in electrical engineering: N - R (Glossary) |
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| Negative electrode In a source of power the negative electrode (negative pole) is called the anode. Nominal capacity The Capacity defined by standards or the manufacturer under certain conditions (charge method, discharging current, time, end-point voltage, temperature). Nominal voltage System voltage as defined by standards or the manufacturer. Nickel Nickel Nickel-cadmium accumulator Nickel-cadmium accumulator Nickel-metal hydride accumulator Nickel-metal hydride accumulator No-load voltage The no-load voltage is the unloaded voltage of a cell or battery, also called the terminal voltage. Oxidation Oxidation was originally understood as a chemical reaction with oxygen. Today, all reactions that release electrons are called oxidation. The opposite of oxidation is Reduction. Platinum Platinum is a rare and thus very expensive, silvery-white and heavy precious metal that is very important in numerous technical applications as a Catalyst. Plutonium Plutonium is a radioactive and very toxic heavy metal. In battery technology it is only important as a raw material for Atomic batteries. PCM 'Protection Circuit Module' - electronic circuits, normally in conjunction with Li-ion packs to monitor under and over-voltage, short-circuit and temperature. Positive electrode In a source of power the positive electrode (positive pole) is called the cathode. Power density The power density describes the maximum power (I U) of a battery per unit of weight (W/kg) or as volumetric power density per unit of volume (W/l). This maximum power can only be drawn from the battery for a very short period of time. Power, electrical The electrical power is (with direct current) the product of the voltage (U) and the strength of current (I). It is expressed in watts (W) or Joule/s. PTC switch PTC stands for 'Positive Temperature Coefficient Resistance Switch'. This is an electronic fuse in Li-Ion accumulators based on a temperature-dependent conductive polymer. Reduction Reduction was originally understood as a chemical reaction that separated oxygen. Today, all reactions in which electrons are absorbed are referred to as reduction. The opposite of reduction is Oxidation. Regenerative battery Launched onto the market at the end of the 90-ies, also under the name Boomerang-batteries, limited rechargeable Alkali-manganese battery Unlike accumulators, these batteries can only be recharged around 25 times. These batteries were generally sold with special chargers. RTG Atomic battery © Marc Stenzel
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