3S 40A INTRODUCTIONProduct Name : 3 string 12.6V 40A lithium battery protection boardCharging voltage : DC 12.6V-13 6VContinuous discharge current : 40A maximum( if the heat dissipation environment is not good , please reduce the load current )Continuous charging current : up to 20ABalance Version Product size : 41*61* 4mmEnhance Version Product size : 41*55*4mmApplicable choice : applicable to the nominal voltage of 3.7V , fully charged 4.2V lithium battery( including 18650 , 26650 , polymer lithium battery ) , can be drilled below 170W

NOTENote 1 : Successfully start the drill requires 3 10C-20C power batteries , or 6 5C-10C powerbatteries ( recommended power battery models : sony vtc4 , VTCAA , vtca , vtc ) OV and 12.6v cable , use Copper wire of 3 square millimeters or more ( nickel sheets cannot be used)Note 2 : Strictly connect 0V , 4.2V , 8.4V , 12.6V according to the diagram . Do not touch any components on the board when soldering the wire . Do not intentionally short circuit.Note 3 : When soldering the battery for the first time or when charging is in progress , as long as the single battery exceeds 4.2V , the " 430 resistor will heat up and discharge ( discharge to about 4.19V to stop heating ) . If the " 430 " resistor is severely hot , check if the wrong line is connected.

HARDWARE PREPARATIONPrepare 3S 12.6V 40A lithium battery protection module , battery , power supply , high power load resistor.

The figure below shows the module discharge diagram . The battery is 3 strings . The connected battery needs to meet the 40A discharge current . It can be realized by paralleling the battery or purchasing a battery with a large discharge current For example , if the battery is 2000MAH and the discharge multiple is 10C , then only 3 strings of 2 are needed and the discharge current is 40A.

The figure below shows the battery charging diagram . The charging voltage is DC12.6v ~ 13.6V . The charging current depends on the battery connected , and the maximum is no more than 20A . The module has a balanced charging path , and the equalization function works only when the battery performance is not much different.

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