141 views Yuda Electronic (HK) Technology Co.,Limited. 2018-10-04
We often use the power adapter to charge, but do you know what is constant voltage charging? What is constant current charging? Do you know the concepts of open circuit voltage, termination voltage, depth of discharge, over discharge, and overcharge? The phone charger wholesale manufacturer will explain the meaning of these words for everyone.
1, constant voltage charging
The voltage between the two poles of the battery is maintained at a constant value for charging. The battery is also in constant voltage charging while the vehicle is running.
2, constant current charging
The constant current charging method is a charging method that keeps the charging current intensity constant. Constant current chargers typically use a slow charging current.
3, the termination voltage
When the battery is discharged, the voltage drops to the lowest operating voltage value at which the battery should not continue to discharge. Depending on the type of battery and the different discharge conditions, the battery capacity and life requirements are also different, so the specified battery discharge termination voltage is also different.
4, open circuit voltage
When the battery is not discharged, the potential difference between the two poles of the battery is called the open circuit voltage. The open circuit voltage of the battery will vary depending on the material of the positive and negative electrodes of the battery. If the materials of the positive and negative electrodes of the battery are exactly the same, then the open circuit voltage is the same regardless of the size of the battery and how the geometry changes.
5, depth of discharge
The percentage of the battery’s discharged capacity as a percentage of its rated capacity during battery use is called the depth of discharge. The depth of discharge has a deep relationship with the charging life of the secondary battery. When the depth of discharge of the secondary battery is deeper, the charging life is shorter, so deep discharge should be avoided as much as possible during use.
6, over discharge
If the battery exceeds the end voltage value of the battery discharge during the discharge process, it may cause the internal pressure of the battery to rise when the discharge continues, and the reversibility of the active materials of the positive and negative electrodes is damaged, so that the capacity of the battery is significantly reduced.
When the battery is fully charged after charging, if it continues to charge, it may cause the internal pressure of the battery to rise, the battery to deform, etc., and the performance of the battery may be significantly reduced and damaged.
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