This specification does not concern legal or safety standards. 26/11/, 1/3. 1 Charging characteristic: IUa (according to DIN ). Regime. Switching. transformer, input PF , low input harmonics (DIN (UI). Find the most up-to-date version of DIN at Engineering
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IUoU battery charging
It consists of three phases or stagesto be executed by a battery charger. From Wikipedia, the free encyclopedia. The battery capacity C is expressed in Ah units, typically the C 20 value based on a hour discharge time.
The charging current is a compromise between charging time favoring high currentsthe prevention of damage due to overheating or gassing favoring low currentsand cost of the charger favoring low currents.
IUoU is a DIN -designation  DIN for a lead-acid battery charging procedure that is also known as 3-stage charging3-phase chargingor 3-step charging. As a result of the current, the battery absorbs the charge and its voltage rises.
During this 14773, the charge current decreases gradually to a small residual value that compensates for any self-discharge of the battery. This page was last edited on 24 Mayat The U o -phase is concluded when the charge current goes below a threshold I minafter which the U-phase is entered.
If a battery is connected to a significant load during charging, the end of the Uo-phase may never be reached and the battery will gas and be damaged, depending on the charge current relative to the battery capacity. In this stage, the battery is continued being charged at a constant over voltage U obut the charge current is decreasing.
Views Read Edit View history. In practice, it depends on the capability of the charger.
Stage 1 is called the I-phaseconstant-current stageor bulk charge stage. The decrease is imposed by the battery. Batteries have varying numbers of cells typically six for an automotive battery and may be flooded-cell, absorbed-glass-matt AGMor gel-electrolyte types. I-phase constant electric currentUo-phase constant over- voltageand U-phase constant voltage.
The purpose is to fully charge the battery in a relatively short time without reducing its rin span and to indefinitely keep the battery charged as long as the charger is connected. The voltage in the U o -phase is too high to be applied indefinitely hence, overvoltagebut it allows 417773 the battery fully in a relatively short time. Retrieved from ” https: For the alternating-current system, see Three-phase electric power.
The three phases are: Dim phase occurs when an IUoU charger is connected to a deeply discharged battery.
The charger limits the maximum voltage to U maxa constant or temperature-dependent maximum, typically around 2. The voltage U o may be the same as U max in the previous stage, or it may be taken slightly higher.
The charger provides a constant current, typically the maximum current that the charger is capable of producing.
IUoU battery charging – Wikipedia
A bad battery will have short I-phase and Uo-phase, but there is a risk of gassingdinn damaging the battery. Stage 2 is called the U o -phaseconstant-voltage boost stageabsorption stageor topping charge.
The current in the I-phase stage 1 should be chosen depending on the capacity of the battery.