What are the performance characteristics and parameters of a small sealed lead-acid battery?
In recent years, small sealed lead-acid batteries have been widely used in many aspects, such as household appliances, audio and video equipment, electric toys, electronic instruments, and standby power supply for the application.
l The performance characteristics of small sealed lead-acid batteries
1.Maintenance-free.
Because the gas generated by the battery is not discharged from the battery, it is absorbed by the polar plate and then reduced to the electrolyte. So the electrolyte will not be reduced, the use of the process do not have to do the liquid level inspection and replenishment.
2. No leakage.
Due to the use of high performance partitions and safety valves, the battery will not leak even if it is inverted.
3 .Full Sealing.
Because there is no gas discharge in the normal use process, there is no acid mist overflow, so the effect of complete sealing can be achieved, and the corrosion of equipment can be avoided.
4 .High Energy.
Because the internal resistance of the battery is very small, the assembly is compact, so it has a high energy density. In particular, the high current emergency discharge performance is excellent. The power it can drive is about 60 % higher than that of an ordinary battery with the same capacity.
5 .Long Life.
The use of corrosion-resistant alloys for the manufacture of plate sheds. Improve the life of the battery. The floating charge can be used for 3 to 5 years and can be recycled more than 300 times. Because the lead calcium alloy is used to replace the traditional ladder gold flow plate, the self-discharge is small and is suitable for long-term placement.
l The parameters of a small battery
The basic parameters of the battery are rated capacity and rated voltage.
This article describes the basic parameters of the battery are rated capacity and rated voltage.
Because the battery is based on the basic single cell battery to make a certain specifications of the product. The rated voltage of each single cell battery is 2V, for example, the 6V battery is composed of three single cells, and the 12V battery is composed of six single cells, so the capacity of the battery is greater, the bigger the volume. The capacity of a lead-acid battery is the storage capacity of the battery. A battery that is usually fully charged is expressed in terms of the amount of electricity generated by the constant discharge of a certain amount of current to the specified termination voltage.
Numerically, the capacity is equal to the product of discharge current and discharge time, and its unit is AH.
In terms of manufacturing technology, the capacity of lead-acid batteries is proportional to the consumption of metal lead used to make electrode plates. At present, the lead consumption of the electrode plate of each small sealed lead-acid battery is 40 ~ 50g / AH. It can be seen that the heavier the lead-acid battery, the greater its capacity. The rated capacity is usually expressed in terms of 20h capacity. For example : 6V, 10AH single grid, is that the battery to 10AH20h = 0.5A battery discharge, to each single cell average termination voltage of 1.75V.It can be continuously discharged for 20 hours.
The rated capacity and rated voltage of the battery, the manufacturer will be marked on the battery slot. The open-circuit voltage of the new battery is about 2.15V per cell, but the storage period is more than half a year, and the capacity will decrease. After 3 to 5 years of use, the battery will also decrease by 10 % to 20 %. In order to maintain the battery capacity, the new battery storage time is too long, before the initial use and after the battery discharge must be charged in a timely manner, replenish power.
l Maintain and detect small sealed lead-acid batteries
( 1 ) Minitype sealed lead-acid batteries maintain the maintenance of small sealed lead-acid batteries, mainly to supplement electric energy, and should be charged with constant voltage. At the beginning of charging, the current is large, and the battery voltage rises and the charging current decreases with the increase of charging time. There are two ways to add electricity.
1)Floating charging or trickle charging as a backup power source for UPS and other equipment. The characteristic of this charging method is that after the emergency discharge of the storage battery, when the external circuit restores the power supply, the battery can be automatically transferred and charged with a small current until the next one secondary discharge. The charging voltage is 2.25 ~ 2.30 volts / single case, or is specified by the manufacturer. The initial charge current is generally less than 0.3 times the rated capacity.
2)As a supplementary charge for the cycle of charging and discharging. This refers to the sealed lead-acid batteries used for portable electrical appliances such as portable lighting, audio and video equipment, etc, and should be discharged at a maximum of 60 % of the rated capacity, and immediately carry out supplementary electricity. The charging voltage is 2.40 ~ 2.50V, or is specified by the manufacturer. The initial charge current is generally less than 0.3 times the rated capacity. In order to prevent overcharge, you should install the timing or automatic trickle charging method as far as possible. When the charging current is stable for 3 hours, it can be considered that the battery is fully charged. The amount of electricity needed to replenish electricity is 1.2 to 1.3 times the amount of electricity generated.
( 2 ) The common failure of the small sealed lead-acid battery is that the internal electrode is open or breakdown and the terminal of the pole is damaged. Open or breakdown of internal electrodes, no charging current or very small. When the breakdown current, the charging current is big, will burn the charger's insurance, needs to replace the new battery.
If you want to know more, our website has product specifications for the battery, you can go to ALLICDATA ELECTRONICS LIMITED to get more information