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So I caused a short circuit.
Solution to sparking when charging 7 strings of 18650 batteries with an adjustable voltage charger
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The cause of the problem is the incorrect setting of the charger. Before using the adjustable voltage charger, it must be set correctly to ensure that the charger's parameters match the batteries before connecting the batteries.
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Specific Steps
Turn on the charger device: Turn on the adjustable voltage charger first without connecting the battery.
Setting Charging Parameters: Set the charger parameters according to the specifications of the battery pack. For example, the charging voltage of 7 series of 18650 batteries is 29.4V (4.2V for each battery group). Set the charger voltage to 29.4V.
Set the current: Set the charging current according to the capacity of the battery pack. Generally speaking, the charging current should not exceed 0.5C of the battery capacity. For example, for an 18650 battery with a 3000mAh capacity, it is recommended that the charging current should not exceed 1.5A.
Check the settings: Make sure the voltage and current parameters are set correctly before proceeding to the next step.
Connecting the Battery
Ensure safety: Connect the battery after ensuring that the charger settings are correct.
Observe the situation: After connecting, observe whether the charger and battery pack work normally.
If there are any abnormalities, such as sparks, overheating, etc., disconnect immediately and check the settings and battery status.
Important Tips
Voltage Matching: The charging voltage must match the total voltage of the battery pack. 7 strings of 18650 batteries have a total voltage of 29.4V. If the charger is set to a higher voltage (e.g., 100V), it may lead to bulging or even explosion of the batteries due to the excessive voltage difference.
Current Limit: Do not set the charging current too high. Excessive current can cause the battery to overheat, increasing the risk.
Equipment Check: Check the status of the charger equipment regularly to ensure that it is working properly and to avoid safety problems caused by equipment failure.
This could be a foundation issue. It's hard for newbies.
1718184423611.png
The cause of the problem is the incorrect setting of the charger. Before using the adjustable voltage charger, it must be set correctly to ensure that the charger's parameters match the batteries before connecting the batteries.
_20240702110752.jpg
Specific Steps
Turn on the charger device: Turn on the adjustable voltage charger first without connecting the battery.
Setting Charging Parameters: Set the charger parameters according to the specifications of the battery pack. For example, the charging voltage of 7 series of 18650 batteries is 29.4V (4.2V for each battery group). Set the charger voltage to 29.4V.
Set the current: Set the charging current according to the capacity of the battery pack. Generally speaking, the charging current should not exceed 0.5C of the battery capacity. For example, for an 18650 battery with a 3000mAh capacity, it is recommended that the charging current should not exceed 1.5A.
Check the settings: Make sure the voltage and current parameters are set correctly before proceeding to the next step.
Connecting the Battery
Ensure safety: Connect the battery after ensuring that the charger settings are correct.
Observe the situation: After connecting, observe whether the charger and battery pack work normally.
If there are any abnormalities, such as sparks, overheating, etc., disconnect immediately and check the settings and battery status.
Important Tips
Voltage Matching: The charging voltage must match the total voltage of the battery pack. 7 strings of 18650 batteries have a total voltage of 29.4V. If the charger is set to a higher voltage (e.g., 100V), it may lead to bulging or even explosion of the batteries due to the excessive voltage difference.
Current Limit: Do not set the charging current too high. Excessive current can cause the battery to overheat, increasing the risk.
Equipment Check: Check the status of the charger equipment regularly to ensure that it is working properly and to avoid safety problems caused by equipment failure.
This could be a foundation issue. It's hard for newbies.