IEC 62877-1-2016 pdf download.Electrolyte and water for vented lead acid accumulators – Part 1: Requirements for electrolyte.
This part of IEC 62877 applies to electrolyte and their components used for filling vented lead-acid batteries, for example dry charged cells or batteries, and for electrolyte replacement or electrolyte density adjustment of batteries in operation. This international standard defines the composition, purity and properties of electrolyte to be applied where specific instructions from the battery manufacturer are not available.
2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 62877-2, Electrolyte and water for vented lead acid accumulators – Part 2: Requirements for water.
3 Terms and definitions For the purposes of this document, the following terms and definitions apply
3.1 electrolyte diluted sulfuric acid (H 2 SO 4 ) for lead-acid accumulators Note 1 to entry: The electrolyte is prepared by mixing concentrated sulfuric acid or sulfuric acid with high density of d > 1 ,30 kg/l and purified water to achieve the density values specified by the battery manufacturer or specified in standards related to the type and battery design in question for a defined state of charge. Its purity meet the requirements laid down in Table 3. Note 2 to entry: Concentrated sulfuric acid is a colorless, highly corrosive and etching liquid with a density 1 ,84 kg/l.
3.2 water purified water (H 2 O) used for the preparation of electrolyte for batteries and for the replacement (topping up) of water loss in the operating electrolyte due to decomposition of water by overcharging and evaporation Note 1 to entry: Purified water meet the requirements specified in IEC 62877-2.
3.3 filling electrolyte diluted sulfuric acid to be used for the first filling of batteries or for the replacement of contaminated operating electrolyte
3.4 first filling original filling of a battery carried out by the battery manufacturer or the user in accordance with the applicable manufacturer’s instructions
3.5 operating electrolyte electrolyte present in the battery following the first filling Note 1 to entry: The density values and the degree of purity of the operating electrolyte may deviate from the values of the filling electrolyte due to impurity input from replenishment by water and to elution from e.g. separators, active material and electrode grids.
3.6 electrolyte density value for the mass per volume expressed in kg/l Note 1 to entry: The density varies with the battery´s state of charge, the electrolyte volume variation due to water loss and the temperature.
3.7 specified density density of the battery to be stated by the battery manufacturer valid at the maximum electrolyte level (see 3.1 0 ) at full state of charge of the battery at the reference temperature Note 1 to entry: It is related to the application and design of the battery.
3.8 reference temperature for analytical results reference temperature for analytical results of electrolyte impurities which is 25 °C ± 1 °C Note 1 to entry: Density values measured at temperatures deviating from this reference temperature are adjusted accordingly.
3.9 measurement of the electrolyte density measurement is carried out by densimeters, in which areometers (hydrometers) are used, or by electronic devices based on e.g. on ultrasonic measurements Note 1 to entry: The accuracy of the instrument is better than ± 0,001 kg/l. 3.1 0 electrolyte level position of the electrolyte surface in the cell/battery, where the recommended tidal movements are indicated by maximum and minimum electrolyte level marks to assist in water replenishment.IEC 62877-1 pdf download.