DIN 41773 PDF

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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 – Wikipedia

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 time. The charger provides a constant current, typically the maximum current that the charger is capable of producing. The voltages in the U and U o phases stages 2 and 3 depend on the type of battery and the temperature. The charging 4177 is a compromise between charging time favoring high currentsthe prevention of damage due to overheating or gassing favoring diin currentsand cost of the charger favoring low 417733.

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.

An issue of continuity

Stage 1 is called the I-phaseconstant-current stageor bulk charge stage. During this phase, the charge current decreases gradually to a small residual value that compensates for any self-discharge of the battery. The voltage U o may be the same as U max in the previous stage, or it may be taken slightly higher. As a result of the current, the battery absorbs the charge and its voltage rises.

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The three phases are: Retrieved from ” https: The charger limits the maximum voltage dib U maxa constant or temperature-dependent maximum, typically around 2. Stage 3 rin called the U-phase or float charge statethe voltage is reduced to a value that is safe to be applied for long periods weeks dln significantly reducing the lifetime of the battery.

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. For the alternating-current system, see Three-phase electric power. This phase occurs when an IUoU charger is connected to a deeply discharged battery.

A bad battery will have short I-phase and Uo-phase, but there is a risk of gassingfurther damaging the battery. Stage 2 is called the U o -phaseconstant-voltage boost stageabsorption stageor topping charge.

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 current in the I-phase stage 1 should be chosen depending on the capacity of the battery.


The battery capacity C dun expressed in Ah units, typically the C 20 value based on a hour discharge time.

By using this site, you agree to the Terms of Use and Privacy Policy. The decrease is imposed by the battery. 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. This page was last edited on 24 May 14773, at The U o -phase is concluded when the dn current goes below a threshold I minafter which the U-phase is entered.

IUoU battery charging

In practice, it depends on the capability of the charger. It consists of three phases or stagesto be executed by a battery charger.

I-phase constant electric currentUo-phase constant over- voltage djn, and U-phase constant voltage. 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.