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Author ：Iflowpower – Portable Power Station Supplier
Lithium battery protective board repair method, voltage poor or abnormal voltage or voltage is very low, first we should adjust the multimeter to a DC 20-volt position, then use red electric meter to touch lithium battery cell positive, black electric sheet pen Contacting the negative electrode, if the multimeter shows that there is no voltage or the voltage is low, then the battery is damaged. Note that the protection board is negatively negitous, if the charger is charged to the lithium battery, it is equivalent to force over. Second, there is no overcurrent protection, there is no overcurrent protection, first to see the circuit of the overcurrent test feet, there is no bad, and some will replace the protection IC.
Third, no resistance or resistance is too large to find the reason for the recognition circuit of the resistance pad, check if there is no deprophy, is there any short circuit or open circuit if there is a short circuit or open. Fourth, not charging first we still use the switch of the multimeter to select the direct current 20V gear, then use the red table pen to contact the positive electrode of the battery or the protective plate, if the multimeter displays the output voltage, we must analyze according to the following : Is there an output voltage? Whether the battery voltage belongs to normal. If the above voltage is not normal, we can basically determine that the protection IC or MOS tube is damaged.
At this time, it is possible to perform the replacement of these two components.
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