DIN 41773 PDF

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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dkn The charger provides a constant current, typically the maximum current that the charger is capable of producing. 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.

The U o -phase is concluded when the charge current goes below a threshold I minafter which the U-phase is entered.

The purpose is to fully charge the battery in a relatively short time without reducing its life span and to indefinitely keep the battery charged as long as the charger is connected. This phase occurs when an IUoU charger is connected to a deeply discharged battery. The 41773 in the U and U o phases stages 2 and 3 depend on the type of battery and the temperature. 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. The three phases are: Stage 1 is called the I-phaseconstant-current stageor bulk charge stage. Retrieved from ” https: This page was last edited on 24 Mayat The charging current is a compromise between charging time favoring high currentsthe prevention of idn due to overheating or gassing favoring low currentsand cost of the charger favoring low currents. The current in the I-phase stage 1 should be chosen depending on the capacity of the battery.

In practice, it depends on the capability of the charger. From Wikipedia, the free encyclopedia.

IUoU battery charging – Wikipedia

Batteries have varying numbers of cells typically six for an automotive battery and may be flooded-cell, absorbed-glass-matt AGMor gel-electrolyte types. IUoU is a DIN -designation [1] DIN for a lead-acid battery charging procedure that is also known as 3-stage 417373-phase chargingor 3-step charging.

For the alternating-current system, see Three-phase electric power. The battery capacity C is expressed in Ah units, typically the C 20 value based on a hour discharge time. The charger limits the maximum voltage to U maxa constant or temperature-dependent maximum, typically around 2. I-phase constant electric current sin, Uo-phase constant over- voltageand U-phase constant voltage.

By using this site, you agree to the Terms of Use and Privacy Policy. It consists of three phases or stagesto be executed by a battery charger. The voltage U o may be the same as U max in the previous stage, or it may be taken slightly higher.


During this phase, the charge current decreases gradually to a small residual value that compensates for any self-discharge of the battery. The decrease is imposed by the battery. As a result of the current, the battery absorbs the charge and its voltage rises. The voltage in the U o -phase is too high to be applied indefinitely hence, overvoltagebut it allows charging the battery fully in a relatively short ddin.

An issue of continuity

Stage 2 is called the U o -phaseconstant-voltage boost stageabsorption stageor topping charge. Stage 3 is called the U-phase or float charge statethe voltage is reduced to a value that is safe to be applied for long periods weeks without significantly reducing the lifetime of the battery.

A bad battery will have short I-phase and Uo-phase, but there is a risk of gassingfurther damaging the battery.