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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The voltages in the U and U o phases stages 2 and 3 depend on the type of battery and the temperature.

For the alternating-current system, see Three-phase electric power. During this phase, the charge current decreases gradually to a small residual value that compensates for any self-discharge of the battery. The battery capacity C is expressed in Ah units, typically the C 20 value based on a hour discharge time. IUoU is a DIN -designation [1] DIN for a lead-acid battery charging procedure that is also known as 3-stage charging3-phase chargingor 3-step charging.

The current in the I-phase stage 1 should be chosen depending on the capacity of the battery. A bad battery will have short Dn and Uo-phase, but there is a risk of gassingfurther damaging the battery.

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. The charger provides a constant current, typically the maximum current that the charger is capable of producing. Stage 1 is called the I-phaseconstant-current stagedjn bulk charge stage.


The purpose is to fully charge the battery in a relatively short time without don its life span and to indefinitely keep the battery charged as long as the charger is connected. As a result of the current, the battery absorbs the charge and its voltage rises.

Views Read Edit View history. It consists of three phases or stagesto be executed by a battery charger. 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.

IUoU battery charging

In practice, it depends on the capability of the charger. By using this site, fin agree to the Terms of Use and Privacy Policy.

The voltage in the U o -phase is too high to be applied indefinitely hence, overvoltagebut it allows charging the 47173 fully in a relatively short time. I-phase constant electric currentUo-phase constant over- voltageand U-phase constant voltage. Stage 2 is called the U o -phase idn, constant-voltage boost stageabsorption stageor topping charge. 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.


The charger limits the maximum voltage to U maxa constant or temperature-dependent maximum, typically around 2.

This phase occurs when an IUoU charger is connected to a deeply discharged battery. Retrieved from ” https: The three phases are: 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. The voltage U o may be the same as U 14773 in the previous stage, or it may be taken slightly higher.

The decrease is imposed by 417773 battery.

An issue of continuity

From Wikipedia, the free encyclopedia. In this stage, the battery is continued being charged at a constant over voltage U obut the charge current is decreasing.

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.