12V lead-acid battery? Its charger needs to be selected as follows:
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The first is the choice of charging voltage: as we all know, the 12V lead-acid battery is made of exactly the same 6 lead-acid batteries with a nominal voltage of 2V in series. The theoretical voltage value of each lead-acid battery is 2.4V when it is fully charged. Six is 14.4V. But consider that when the lead-acid battery is about to be full, a large amount of electricity is not used to decompose lead sulfate, but to electrolyze water. As a result, the water in the electrolyte decreases and the electrolyte concentration increases. In turn, the plate and separator are damaged, and the battery life is shortened. However, if the charging voltage is too low, the battery will not be charged, and the lead sulfate on the plate can not be completely decomposed, resulting in lead sulfate crystallization. Vulcanize the battery and scrap it. Therefore, choosing a work area that can be basically fully charged, but does not electrolyze a lot of water is the most ideal solution. According to a large number of tests show that: the nominal value of 12V lead-acid battery, the use of DC 13.5V charging, can take into account the capacity and life.
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Talking about voltage, we have to talk about current. For common 12V lead-acid batteries, the capacity is only a few ampere-hours, such as motorcycle batteries; Large capacity is hundreds of ampere-hours, such as loader batteries. You can't change everything with the same thing, can you? Everything must have a formula, otherwise it is unreliable. As far as lead-acid batteries are concerned, the charging current is generally one-tenth to one-twentieth of its capacity is most appropriate: when the initial charging current is one-tenth of an amp, when the battery voltage is 13.5V, it is more appropriate to change the current to one-twentieth of an hour. For example, 100AH battery, the first stage of charging can use 10A; When the voltage at both ends of the battery is 13.5V, switch to 5A charging until the current is less than 500mA. In this way, it is full and avoids the lead sulfate caused by excessive charging current, which is surrounded by other substances without time to decompose, causing crystallization vulcanization problems. Just like a farmer using 镢头 to plough the ground, if he probes far, there will be some places where the soil has not been turned. The formation of a hard threshold.
12V dry battery can use 13-15V charger, usually 14V car. A single lead is nominal at 2v, undercharged at 1.8v and saturated at 2.25v (2.2v for colloidal batteries). 12v battery has 6 monomers: undervoltage is 1.8*6=10.8v; Saturation voltage is 2.25*6=13.5v.
In general, when the 12v battery is fully charged, it should be in the range of 12.5-13.1 volts, if it is lower than 12.5V, it needs to be charged in time, otherwise it is easy to have a difficult situation. However, do not overcharge after full charge, although the current generated by the charger is not very large, but because the electrolyte is in a boiling state for a long time, not only the fine particles on the surface of the active substance are easy to fall off, but also the oxidation of the grid, resulting in loose stripping of the active substance and the grid. 12v battery is fully charged, usually there is a multi-color indicator lamp on the charger, when the battery is being charged, it will be shown in red. After full charge will be directly converted to green, so when you see the green light, you can stop charging. The chargers on the market are now very intelligent, and when fully charged, the words \"full\" will be displayed directly on the display screen, which can be said to be more intuitive than the indicator.
The 48 Ann charger is the fastest, if you choose, you can choose the 48 Ann charger, so that the battery car is also enough. And this battery belongs to a small battery, we do not need to use a large charger, otherwise it is easy to charge the charger battery, and we want to configure, you can configure a. 48 is good enough. That's it.
To charge the battery, the charging current is selected for one-tenth of the battery capacity, that is, to fast charge the battery, to one-twentieth of the battery capacity, that is, to slow charge the battery. If the charging current of the battery is too large, it is easy to cause the battery liquid to boil, which is not good for the battery and will affect the life of the battery. The charging current is too small, although it is good for the battery, but the charging time is too long and it is not convenient to use.
It is best to have a small current and charge the battery for such a long time. Generally, one-twentieth of the battery capacity should be used to charge, and the charging time is appropriate for about 24 hours.
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