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What are the causes of the discharging heat of lead-acid batteries?
What are the causes of the discharging heat of lead-acid batteries?
If the discharge is too fast, it may be that the lead-acid battery has a small capacity and the discharge current exceeds 0.5C for a long time. It is emphasized here that although the battery consumes a certain amount of electricity after a short journey, there is a recovery process after the battery is stationary, and the electrochemical process of the plate continues.
If the discharge is too fast, it may be that the lead-acid battery has a small capacity and the discharge current exceeds 0.5C for a long time. It is emphasized here that although the battery consumes a certain amount of electricity after a short journey, there is a recovery process after the battery is stationary, and the electrochemical process of the plate is still going on, so the voltage will rise, but it does not mean the capacity will rise; on the contrary, the electrochemical effect of the plate is related to the non-stop of the long journey. There are three situations when the consumption of electricity goes on at the same time:
1. When the rated voltage of the motor is low, the capacity of Xili battery is small and the working current is large, the voltage will be reduced sharply, and the capacity will be consumed quickly, which is the most disadvantageous to the battery.
2. The electrochemical reaction speed of lead-acid batteries can only maintain the driving speed. The batteries have no chance to recover and breathe. They often charge and discharge in the whole cycle. If they are neglected, they will be over-consumed. When facing windward uphill, the power consumption is very high, which forces the battery plate to react rapidly. The heat of the battery shell is high, which will damage the battery, shorten its life, and show that the capacity is not surplus.
3. Ideally, the electrochemical reaction rate of the yuasa battery can supply enough electric energy calmly. The shell of the battery has no abnormal heat, indicating that the capacity of the battery is redundant.
Only the last of the three is ideal for long distance driving. It should be noted that the shell of the battery is obviously heated, and the internal battery itself is much hotter.
What are the causes of battery charging heating?
In the charging process of lead-acid batteries, part of the electric energy is converted to chemical energy, and part of the energy is converted to thermal energy and other energy. The heating of rechargeable batteries is a normal phenomenon, but when the temperature is high, it is necessary to check whether the charging current is too large or whether the short circuit occurs inside the batteries.
The relationship between calorific value and the amount of electrolyte is small. If the internal resistance of sealed battery increases when the amount of electrolyte is small, the temperature of battery will rise and the terminal voltage will be high when charging. Aging of batteries, drying up of electrolyte and short circuit inside also cause fever. Charger can not be constant voltage in the later period of charging, so that the battery voltage exceeds the allowable value, the temperature will rise, serious swelling, the end of life.
In use, try not to put it sideways or upside down to prevent a large amount of gas generated inside the battery from being discharged smoothly from the exhaust valve, especially when charging, otherwise it may cause the shell to burst.
What is the reason for the temperature rise of new lead-acid batteries after adding electrolyte?
After adding electrolyte to the new lead-acid batteries, the temperature rise is related to the internal factors of the new batteries. The temperature of dry-charged batteries increases after adding liquid, but the temperature of batteries is not very obvious. This is because the dry-charged electrode plate has been treated by antioxidant treatment, and the batteries manufactured are in full charge state, which can be loaded after adding liquid. The batteries of ordinary plates are in semi-full charge state without antioxidant treatment, and quite a number of substances are in semi-full charge state. It produces a lot of heat for the reaction of lead oxide with dilute sulfuric acid, so the temperature is very high. Sometimes in summer, the temperature is above 50 C, so manual cooling should be paid attention to when charging.
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