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

By using this site, you agree to the Terms of Use and Privacy Policy. Retrieved from ” https: Stage 1 is called the I-phaseconstant-current stageor 14773 charge stage. From Wikipedia, the free encyclopedia. The charger limits the maximum voltage to U maxa constant or temperature-dependent maximum, typically around 2. A bad battery will have short I-phase and Uo-phase, but there is a risk of gassingfurther damaging the battery. 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.

An issue of continuity

The three phases are: The current in the I-phase stage 1 should be chosen depending on the capacity of the battery. This page was last edited on 24 Mayat 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.

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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.

IUoU battery charging – Wikipedia

The voltage U o may be the same as U max in the previous stage, or it may be taken slightly higher. 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.

The decrease is 417733 by the battery.

47173 The U o -phase is concluded when the charge current goes below a threshold I minafter which the U-phase is entered. During this phase, the charge current decreases gradually to a small residual value that compensates for any self-discharge of the battery.

Stage 2 is called the U o -phaseconstant-voltage boost stageabsorption stageor topping charge. 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.

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IUoU battery charging

It consists of three phases or stagesto be executed by a battery charger. 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.

Views Read Edit View history. This phase occurs when an IUoU charger is connected to a deeply discharged battery.

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. As a result of the current, the battery absorbs the charge and its voltage rises. 441773 constant electric currentUo-phase constant over- voltageand U-phase constant voltage.

In practice, it depends on the capability of the charger. The voltages in the U and U o phases stages 2 and 3 depend on the type of battery and the temperature. The voltage in the 4177 o -phase is too high to be applied indefinitely hence, overvoltagebut it allows charging the battery fully in a relatively short time.