When the lead-acid battery is charged, the positive and negative electrodes are reversed, which will make the battery charged back, so that the positive and negative electrodes almost become coarse grain PbSO4, resulting in insufficient battery charge capacity, can not work normally, and even lead to the battery scrap. The positive and negative electrodes in the battery are opposites, but they participate in chemical reactions at the same time. When the battery is discharged, the load of the external circuit is connected, and the electrons flow from the negative plate to the positive plate through the load of the external circuit, so that the potential of the positive plate decreases. If the positive and negative electrodes of the lead-acid battery are changed, the original negative electrode will become positive, the original positive electrode will become negative, and the terminal voltage will be negative. Extended documents Water refill for lead-acid batteries:
1, in normal use, in a charge and discharge cycle, the water loss of a unit battery is about 4ml \/100Ah of water. For example, a 500Ah cell battery should be supplemented with approximately 20 ml of pure water.
2. After water refill, the battery liquid level must not exceed 10mm of the splash pad. The reason is that the liquid level is too high, which will cause the battery liquid to splash out during the electrochemical reaction, resulting in a decrease in the concentration of battery liquid, thereby reducing the battery capacity and battery voltage, and the spilled battery liquid will cause corrosion to the car body and battery.
3, if the battery level is insufficient, when the battery is used, the upper part of the battery plate will be exposed to the battery liquid, which reduces the area of the battery plate to participate in the electrochemical reaction, thereby reducing the capacity of the battery.