What is floating charge of a battery? What is the purpose of floating charge?

There is a continuous, long time of constant voltage charging method. In order to balance the battery for battery capacity loss caused by self-discharge, it needs a continuous, long constant voltage charging. This is float charging mode, and is also known as the floating charge and continuous charge. Float charging voltage is slightly more than a trickle charge enough to compensate loss of battery self-discharge and is able to quickly back to nearly full charge state after the battery discharge the battery. It is also known as the continuous charging. This way of charging is mainly used for telephone switching station, uninterruptible power supply (UPS) and various kinds of standby power.

After fully charged battery, switch to small current to the battery to charge, this is known as the floating charge, also known as trickle charging. The small current general is not arbitrary, but after the voltage setting of float charging voltage (such as to the 12 v battery as an example, the float charging pressure), within the range of 13.2 V to 13.2 V batteries have adequate electricity, can accept the current is very small, is automatically formed float charging flow.

There are three: the purpose of the floating

1, keep the battery voltage in the scope of float charging voltage, the battery plate gate (is the conductive plate skeleton) corrosion is in a state of the slowest, can prolong battery life.

2, added capacity loss caused by the battery self-discharge, maintain sufficient power.

3, inhibit recrystallization caused by the sulfuric acid salinization of active material.

There are no limits to the floating time of the battery, as long as the voltage in a float charging voltage range, lead-acid battery is not afraid of floating, such as communication systems use long life battery, warranty period are more than 8 years, the whole life period in addition to the mains failure is used and regular maintenance, remain the state of floating.

Floating is a kind of battery for electrical works (put), the system will be a battery connected to the power line parallel to the load circuit, it is a constant voltage in general, only slightly higher than the battery terminal voltage, by the power circuit for a small number of current compensation for the loss of battery local effects, so that it can often keep in charge to meet state without charge.

Floating feature: the battery is charging device, in addition to the conventional load power supply, battery was provided with floating charge flow. This operation is called the floating works, referred to as "floating operation.

Therefore, the battery can be charge according to the power line voltage fluctuate. When the load is lighter and higher power line voltage, the battery is recharged, when load heavier or power accident interrupt, battery to discharge, share some or all of the load. In this way, the battery voltage stabilizing effect, and is in standby state.

Floating power supply works can be divided into half floating and floating. As part of the time (when the load is heavier) floating power supply, and the other part of the time (when the load is lighter) by the battery power supply way of working alone, called a floating works, or floating work regularly. If all the time all by parallel floating power supply circuit and battery power supply, it is called a full floating works, or continuous floating way to work.

Batteries used in floating work way, its life is generally all put working way is longer, and can switch to smaller capacity battery instead. This way of floating power supply work more power for power plants spare power and telephone office phone normal power supply.

Float charging pressure refers to the communication power supply system, the rectifier and battery and the feed line, when the mains is normal, the rectifier power supply, but also to the tiny battery supplement current rectifier output voltage, in the process of says this style of power supply is called floating at the same time.

Based on voltage is within the scope of the work voltage charging pressure, equilibrium voltage and termination voltage 3 kinds.

When the batteries are in a state of full, the charger will not stop, will provide a constant float charging pressure and small float charging flow supply battery, because, once the charger to stop, the battery will naturally release energy, so use floating, balance the natural discharge.

All charge

A battery charging mode. With constant current and constant time of the battery, charging quickly. Compared with floating charging voltage. In professional maintenance staff often used at the time of the battery maintenance, charging mode, the model and to activate the chemical properties of the battery.

floating

A battery for electrical works (put), is connect the battery and power supply line parallel to the load circuit, it is a constant voltage in general, only slightly higher than the open circuit voltage of battery, by the power circuit for a small number of current compensation for the loss of battery local effects, so that it can often keep in charge to meet state without charge. Therefore, the battery can be charge according to the power line voltage fluctuate. When the load is lighter and higher power line voltage, the battery is recharged, when load heavier or power accident interrupt, battery to discharge, share some or all of the load. In this way, the battery voltage stabilizing effect, and is in standby state.(for spare batteries)

Floating power supply works can be divided into half floating and floating. As part of the time (when the load is lighter) floating power supply, and the other part time (when the load is heavier) by the battery power supply way of working alone, called a floating works, or floating work regularly. If all the time all by parallel floating power supply circuit and battery power supply, it is called a full floating works, or continuous floating way to work.

With net works using the battery, its life is generally all put working way is longer, and can switch to smaller capacity battery instead. This way of floating power supply work more power for power plants spare power and telephone office phone normal power supply.

At present, the power plant and substation dc system fixed type lead-acid batteries selected float charging voltage 2.15 V battery is basically all of them.

But some unit after test and running, on the basis of the experiences that raise the float charging voltage is beneficial, such as Chongqing institute of battery electrolyte specific gravity of 1.212 (25 oc) is put forward when the float charging voltage 2.16 V, when the electrolyte specific gravity of 1.240 (25 ℃) with 2.1 sV float charging voltage, when this does not consider the change of room temperature. Float charging pressure also has relationship with plate of the composition, formation type plate and lead calcium alloy plate gate because there was no antimony pollution, so the over potential won't change, float charging voltage can use a 2.25 V, 2.17 while lead antimony alloy type appropriate USES from 2.15 V to 2.17 V. State-run Yangtze river power plant research institute of the experiment proved that after many years of fixed type lead-acid battery of float charging voltage from 2.15 V to 2.17 V slightly low, when the battery of the sulfuric acid electrolyte specific gravity of 1.215, take 2.18 a battery of floating charge pressure 2. ZOV is more appropriate.[1]

Float charging voltage related to electrolyte specific gravity. Float charging voltage contains had potential, and the potential value between floating current value and the wireless sex, so floating

Between voltage and electrolyte proportion also should not have linear relation. If electrolyte with high proportion, float charging voltage can be slightly higher accordingly. In addition, the float charging pressure also have a close relationship with floating current value. Our hospital in 1978 with the Shenyang institute of battery has carried on the various features to GGF type series battery test and discussion. To GGF 10 type battery charged under different float charging pressure values measured float charging flow as shown in table 2.The floating current value is listed in table 2 in May choose float charging battery charging pressure measured, and usually say float charging flow refers to the corresponding charging voltage. The battery for a stable and constant charging current value. Visible from table 2

A. when float charging down float charging flow is small, on the contrary, float charging at high pressure float charging current is larger.

B. in the float charging battery operation, is actually under the given value of constant voltage charging, so when the charging current value stable, indicates that the battery is already in full charge state.

C. equilibrium under the voltage of 2.4 V battery charging again after floating in 2.15 V voltage, the current value is lower than with 2.15 V voltage floating charge current directly.[1]

Floating refers to a continuous, long time of constant voltage charging method. Float charging voltage slightly more than a trickle charge enough to compensate loss of battery self-discharge and be able to quickly after the battery discharge the battery back to nearly full charge state. Also known as the continuous charging. This way of charging is mainly used for telephone switching station, uninterruptible power supply (UPS) and various kinds of standby power.

Floating charge is existed between plate capacitor, capacitance between the plate is not large, floating charge also known as floating on the surface of electricity. Discharge it will soon be able to put out the battery work absolutely cannot rely on the floating electricity can only rely on the liquid and plate chemical reaction only chemical reactions to store chemical energy can ensure sufficient discharge capacity.

(1) battery at ordinary times should be in the online floating state.

(2) battery float charging voltage of 2.23 V/single (25 ℃).

(3) floating operation six months after the battery terminal voltage between the same group of maximum deviation should be no greater than 100 mv/single.

(4) floating process normally float charging flow or less 1 ‰ C10.

(5) float charging pressure should be adjusted with the temperature, temperature compensation coefficient of general press 2 v series adopts - 3 mv / ℃, the single, 6 v, 12 v series using 4 mv / ℃, the single (25 ℃ as basis points).

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