After the battery is discharged to the termination voltage, it continues to discharge and becomes overdischarge. Over-discharge will seriously damage the battery, which is extremely detrimental to the electrical performance and cycle life of the battery. The internal resistance of the battery is large when the battery is discharged to the final voltage, and the electrolyte concentration is very thin, especially the plate hole and surface are almost neutral. The internal resistance of over-discharge has a tendency to heat, and the volume expands. When the discharge current is large, it will obviously heat up ( Even heat deformation occurs), which makes the concentration of lead sulfate extremely large, and the possibility of short-circuiting of the production of crystal branches increases. Moreover, lead sulfate will crystallize into larger particles at this time, which will form irreversible sulfation, which will further increase the internal resistance and charge Resilience is poor, even beyond repair. When the battery is in use, it should be prevented from over-discharge, and under-voltage protection is a very effective measure. In addition, because the under-voltage protection of electric tricycle
s is controlled by the controller, other devices outside the controller, such as voltmeters, indicator lights, and other power-consuming appliances, are powered by batteries, and their power supply is generally not controlled by the controller. , Once the electric tricycle lock (switch) is closed, it starts to use electricity. Although the current is small, over-discharge will occur if it is discharged for a long time (1~2 weeks). Therefore, do not open the lock for a long time, and turn it off immediately when not in use.
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