Battery module insulation system

The utility model relates to a battery module insulation system, including a plurality of electric core monomers of being in the same place with copper bar generating line laser welding, its technical essential is: adjacent battery module just, the negative pole connects with the copper bar generating line, bolt and the nut that have insulating sheath, the copper bar generating line is including long copper bar generating line and short copper bar generating line, is equipped with with the corresponding fixed orifices I of battery box on the short copper bar generating line and welds the bolt, is equipped with the fixed orifices II corresponding with the battery box on the long copper bar generating line. Couple together the battery module with the daisy chaining constitution power input/output return circuit through the copper bar generating line to realize insulating protection.